Pix Brook Outlet Reservoir upstream of Letchworth
EA name: PIX BK.OUTLET RESERVOIR U/S LETCHWORTH
Environment Agency sampling point AN-14M05 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)
These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.
Where and when
- Last sampled
- 10 Jul 2026, 11:273 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 6 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (national agency policy)
- Where
- National Grid 520990, 233450As published, to the nearest 10 m. Open in a map
- River, by its own name
- Pix Brook Outlet Reservoir
- River, by the map
- Pix BrookPlaced on a river whose name partly matches its own, 3 m from the line.
- Next gauge downstream
- Biggleswade On the River Ivel · 15 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (13 samples)
Planned investigation (national agency policy) (6 samples)
Monitoring (national agency policy) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
48.6%
Sampled 10 Jul 2026, 3 months ago · 15 results banked
Also measured in percentage on another sample material (2EAZ): 3 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 48.6 | 48.6% |
| 8 Apr 2026, 09:04 | 82.5 | 82.5% |
| 6 Jan 2026, 13:09 | 95.7 | 95.7% |
| 8 Oct 2025, 08:19 | 58.7 | 58.7% |
| 5 Aug 2025, 08:15 | 61 | 61% |
| 3 Jul 2025, 13:56 | 68.9 | 68.9% |
| 3 Jul 2025, 13:55 | 68.9 | 68.9% |
| 11 Apr 2025, 10:31 | 104.2 | 104.2% |
| 22 Jan 2025, 08:06 | 82.1 | 82.1% |
| 18 Nov 2024, 14:10 | 66 | 66% |
| 3 Oct 2024, 11:27 | 90.3 | 90.3% |
| 1 Jul 2024, 14:58 | 62.5 | 62.5% |
| 2 Apr 2024, 13:18 | 104.8 | 104.8% |
| 4 Jan 2024, 15:32 | 93 | 93% |
| 6 Oct 2023, 09:08 | 42.8 | 42.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.3 mg/l
Sampled 10 Jul 2026, 3 months ago · 13 results banked
Also measured in milligram per litre on another sample material (2EAZ): 3 results, kept apart (see the table).
Every result (13)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 4.3 | 4.3 mg/l |
| 8 Apr 2026, 09:04 | 9.42 | 9.42 mg/l |
| 6 Jan 2026, 13:09 | 13.7 | 13.7 mg/l |
| 8 Oct 2025, 08:19 | 6.21 | 6.21 mg/l |
| 5 Aug 2025, 08:15 | 6.13 | 6.13 mg/l |
| 3 Jul 2025, 13:56 | 6.72 | 6.72 mg/l |
| 11 Apr 2025, 10:31 | 11.5 | 11.5 mg/l |
| 22 Jan 2025, 08:06 | 10.2 | 10.2 mg/l |
| 3 Oct 2024, 11:27 | 9.55 | 9.55 mg/l |
| 1 Jul 2024, 14:58 | 6.24 | 6.24 mg/l |
| 2 Apr 2024, 13:18 | 11.5 | 11.5 mg/l |
| 4 Jan 2024, 15:32 | 10.8 | 10.8 mg/l |
| 6 Oct 2023, 09:08 | 4.42 | 4.42 mg/l |
Water temperature
code 0076 · °C
21.2 °C
Sampled 10 Jul 2026, 3 months ago · 15 results banked
Also measured in celsius on another sample material (2EAZ): 4 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 21.2 | 21.2 °C |
| 8 Apr 2026, 09:04 | 9.4 | 9.4 °C |
| 6 Jan 2026, 13:09 | 0.7 | 0.7 °C |
| 8 Oct 2025, 08:19 | 12.7 | 12.7 °C |
| 5 Aug 2025, 08:15 | 15 | 15 °C |
| 3 Jul 2025, 13:56 | 16.4 | 16.4 °C |
| 3 Jul 2025, 13:55 | 16.4 | 16.4 °C |
| 11 Apr 2025, 10:31 | 10.8 | 10.8 °C |
| 22 Jan 2025, 08:06 | 5.8 | 5.8 °C |
| 18 Nov 2024, 14:10 | 9 | 9 °C |
| 3 Oct 2024, 11:27 | 12.7 | 12.7 °C |
| 1 Jul 2024, 14:58 | 15.3 | 15.3 °C |
| 2 Apr 2024, 13:18 | 11.3 | 11.3 °C |
| 4 Jan 2024, 15:32 | 8.9 | 8.9 °C |
| 6 Oct 2023, 09:08 | 13.8 | 13.8 °C |
pH
code 0061
7.77
Sampled 10 Jul 2026, 3 months ago · 15 results banked
Also measured in ph units on another sample material (2EAZ): 4 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 7.77 | 7.77 |
| 8 Apr 2026, 09:04 | 8.2 | 8.2 |
| 6 Jan 2026, 13:09 | 8.3 | 8.3 |
| 8 Oct 2025, 08:19 | 7.9 | 7.9 |
| 5 Aug 2025, 08:15 | 7.8 | 7.8 |
| 3 Jul 2025, 13:56 | 8 | 8 |
| 3 Jul 2025, 13:55 | 7.81 | 7.81 |
| 11 Apr 2025, 10:31 | 8.2 | 8.2 |
| 22 Jan 2025, 08:06 | 7.9 | 7.9 |
| 18 Nov 2024, 14:10 | 7.69 | 7.69 |
| 3 Oct 2024, 11:27 | 8.2 | 8.2 |
| 1 Jul 2024, 14:58 | 8.1 | 8.1 |
| 2 Apr 2024, 13:18 | 8.24 | 8.24 |
| 4 Jan 2024, 15:32 | 8.3 | 8.3 |
| 6 Oct 2023, 09:08 | 7.1 | 7.1 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.4 mg/l
Sampled 10 Jul 2026, 3 months ago · 12 results banked
Also measured in milligram per litre on another sample material (2EAZ): 4 results, kept apart (see the table).
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 0.4 | 0.4 mg/l |
| 8 Apr 2026, 09:04 | 0.23 | 0.23 mg/l |
| 6 Jan 2026, 13:09 | 0.19 | 0.19 mg/l |
| 8 Oct 2025, 08:19 | 0.04 | 0.04 mg/l |
| 5 Aug 2025, 08:15 | 0.16 | 0.16 mg/l |
| 3 Jul 2025, 13:56 | 0.11 | 0.11 mg/l |
| 11 Apr 2025, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2025, 08:06 | 1.6 | 1.6 mg/l |
| 3 Oct 2024, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2024, 14:58 | 0.59 | 0.59 mg/l |
| 4 Jan 2024, 15:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2023, 09:08 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.14 mg/l
Sampled 10 Jul 2026, 3 months ago · 12 results banked
Also measured in milligram per litre on another sample material (2EAZ): 4 results, kept apart (see the table).
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 2.14 | 2.14 mg/l |
| 8 Apr 2026, 09:04 | 3.71 | 3.71 mg/l |
| 6 Jan 2026, 13:09 | 5.04 | 5.04 mg/l |
| 8 Oct 2025, 08:19 | 3.09 | 3.09 mg/l |
| 5 Aug 2025, 08:15 | 3.17 | 3.17 mg/l |
| 3 Jul 2025, 13:56 | 5.2 | 5.2 mg/l |
| 11 Apr 2025, 10:31 | 4.8 | 4.8 mg/l |
| 22 Jan 2025, 08:06 | 3.84 | 3.84 mg/l |
| 3 Oct 2024, 11:27 | 4.58 | 4.58 mg/l |
| 1 Jul 2024, 14:58 | 4.26 | 4.26 mg/l |
| 4 Jan 2024, 15:32 | 5.67 | 5.67 mg/l |
| 6 Oct 2023, 09:08 | <0.196 | below 0.196 mg/l (not detected above this) |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.26 mg/l
Sampled 10 Jul 2026, 3 months ago · 12 results banked
Also measured in milligram per litre on another sample material (2EAZ): 4 results, kept apart (see the table).
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 0.26 | 0.26 mg/l |
| 8 Apr 2026, 09:04 | 0.33 | 0.33 mg/l |
| 6 Jan 2026, 13:09 | 0.5 | 0.5 mg/l |
| 8 Oct 2025, 08:19 | 0.46 | 0.46 mg/l |
| 5 Aug 2025, 08:15 | 0.29 | 0.29 mg/l |
| 3 Jul 2025, 13:56 | 0.58 | 0.58 mg/l |
| 11 Apr 2025, 10:31 | 0.32 | 0.32 mg/l |
| 22 Jan 2025, 08:06 | 0.23 | 0.23 mg/l |
| 3 Oct 2024, 11:27 | 0.1 | 0.1 mg/l |
| 1 Jul 2024, 14:58 | 0.46 | 0.46 mg/l |
| 4 Jan 2024, 15:32 | 0.099 | 0.099 mg/l |
| 6 Oct 2023, 09:08 | 0.25 | 0.25 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
745 µS/cm
Sampled 10 Jul 2026, 3 months ago · 15 results banked
Also measured in microsiemens per centimetre on another sample material (2EAZ): 3 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:27 | 745 | 745 µS/cm |
| 8 Apr 2026, 09:04 | 870 | 870 µS/cm |
| 6 Jan 2026, 13:09 | 862 | 862 µS/cm |
| 8 Oct 2025, 08:19 | 744 | 744 µS/cm |
| 5 Aug 2025, 08:15 | 636 | 636 µS/cm |
| 3 Jul 2025, 13:56 | 1082 | 1082 µS/cm |
| 3 Jul 2025, 13:55 | 1082 | 1082 µS/cm |
| 11 Apr 2025, 10:31 | 915 | 915 µS/cm |
| 22 Jan 2025, 08:06 | 2338 | 2338 µS/cm |
| 18 Nov 2024, 14:10 | 506 | 506 µS/cm |
| 3 Oct 2024, 11:27 | 787 | 787 µS/cm |
| 1 Jul 2024, 14:58 | 787 | 787 µS/cm |
| 2 Apr 2024, 13:18 | 831 | 831 µS/cm |
| 4 Jan 2024, 15:32 | 899 | 899 µS/cm |
| 6 Oct 2023, 09:08 | 836 | 836 µS/cm |
Everything measured here
155 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.
Show all 339 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 15 | Oct 2023 – Jul 2026 | 48.6% 10 Jul 2026 |
| Oxygen, Dissolved, % Saturation 9901 | Groundwater - static/unpurged | 3 | Nov 2024 – Nov 2025 | 71% 13 Nov 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 13 | Oct 2023 – Jul 2026 | 4.3 mg/l 10 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | Groundwater - static/unpurged | 3 | Nov 2024 – Nov 2025 | 7.46 mg/l 13 Nov 2025 |
| Temperature of Water 0076 | River water | 15 | Oct 2023 – Jul 2026 | 21.2 °C 10 Jul 2026 |
| Temperature of Water 0076 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 11.3 °C 29 Apr 2026 |
| pH 0061 | River water | 15 | Oct 2023 – Jul 2026 | 7.77 10 Jul 2026 |
| pH 0061 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 7.87 29 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Oct 2023 – Jul 2026 | 0.4 mg/l 10 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.78 mg/l 29 Apr 2026 |
| Nitrate as N 0117 | River water | 12 | Oct 2023 – Jul 2026 | 2.14 mg/l 10 Jul 2026 |
| Nitrate as N 0117 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 4.07 mg/l 29 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Oct 2023 – Jul 2026 | 0.26 mg/l 10 Jul 2026 |
| Orthophosphate, reactive as P 0180 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.36 mg/l 29 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 15 | Oct 2023 – Jul 2026 | 745 µS/cm 10 Jul 2026 |
| Conductivity at 25 C 0077 | Groundwater - static/unpurged | 3 | Nov 2024 – Apr 2026 | 416 µS/cm 29 Apr 2026 |
| 1,1,1,2-Tetrachloroethane 6534 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,1,1-Trichloroethane 3268 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,1,2,2-Tetrachloroethane 7531 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,1,2-Trichloroethane 9811 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,1-Dichloroethane 3269 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,1-Dichloroethylene :- {1,1-Dichloroethene} 9836 | River water | 9 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,2-Dichloroethane 3272 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Nov 2024 – Jul 2025 | below 0.004 µg/l 3 Jul 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Oct 2023 – Jul 2026 | 270 mg/l 10 Jul 2026 |
| Aluminium 6057 | River water | 13 | Oct 2023 – Jul 2026 | 96 µg/l 10 Jul 2026 |
| Aluminium, Dissolved 6037 | River water | 12 | Oct 2023 – Jul 2026 | 22 µg/l 10 Jul 2026 |
| Barium 6062 | River water | 13 | Oct 2023 – Jul 2026 | 64 µg/l 10 Jul 2026 |
| Barium, Dissolved 9446 | River water | 12 | Oct 2023 – Jul 2026 | 66 µg/l 10 Jul 2026 |
| Benzene 3781 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Bicarbonate as HCO3 9584 | River water | 12 | Oct 2023 – Jul 2026 | 329 mg/l 10 Jul 2026 |
| Boron 6059 | River water | 13 | Oct 2023 – Jul 2026 | below 100 µg/l 10 Jul 2026 |
| Boron, Dissolved 9447 | River water | 12 | Oct 2023 – Jul 2026 | below 100 µg/l 10 Jul 2026 |
| Bromodichloromethane 3282 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Bromoform :- {Tribromomethane} 3283 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Cadmium 0108 | River water | 13 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Cadmium, Dissolved 0106 | River water | 12 | Oct 2023 – Jul 2026 | below 0.01 µg/l 10 Jul 2026 |
| Calcium 0241 | River water | 13 | Oct 2023 – Jul 2026 | 130 mg/l 10 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 12 | Oct 2023 – Jul 2026 | 120 mg/l 10 Jul 2026 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 11 | Oct 2023 – Jul 2026 | 3 mg/l 10 Jul 2026 |
| Chloride 0172 | River water | 12 | Oct 2023 – Jul 2026 | 43 mg/l 10 Jul 2026 |
| Chlorobenzene 3290 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Chlorodibromomethane 3292 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Chloroform :- {Trichloromethane} 3373 | River water | 10 | Oct 2023 – Jul 2026 | 0.48 µg/l 10 Jul 2026 |
| Chromium 3164 | River water | 13 | Oct 2023 – Jul 2026 | 0.58 µg/l 10 Jul 2026 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | River water | 8 | Nov 2024 – Jul 2026 | 0.086 µg/l 10 Jul 2026 |
| Chromium, Dissolved 3409 | River water | 12 | Oct 2023 – Jul 2026 | below 0.5 µg/l 10 Jul 2026 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | River water | 9 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Copper 6452 | River water | 13 | Oct 2023 – Jul 2026 | 2.9 µg/l 10 Jul 2026 |
| Copper : BLM Bioavailable 4821 | River water | 11 | Oct 2023 – Jul 2026 | 0.18 µg/l 10 Jul 2026 |
| Copper, Dissolved 6450 | River water | 12 | Oct 2023 – Jul 2026 | 1.9 µg/l 10 Jul 2026 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | River water | 10 | Oct 2023 – Jul 2026 | below 0.2 µg/l 10 Jul 2026 |
| Ethyl tert-butyl ether :- {ETBE} 9844 | River water | 9 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Ethylbenzene 4117 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Fluoride 0177 | River water | 12 | Oct 2023 – Jul 2026 | 0.18 mg/l 10 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 12 | Oct 2023 – Jul 2026 | 317 mg/l 10 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| Ionic Balance 7044 | River water | 12 | Oct 2023 – Jul 2026 | 0.427% 10 Jul 2026 |
| Ionic Balance: Dissolved 3386 | River water | 12 | Oct 2023 – Jul 2026 | -2.83% 10 Jul 2026 |
| Iron 6051 | River water | 13 | Oct 2023 – Jul 2026 | 330 µg/l 10 Jul 2026 |
| Iron, Dissolved 6460 | River water | 12 | Oct 2023 – Jul 2026 | 130 µg/l 10 Jul 2026 |
| Lead 0050 | River water | 13 | Oct 2023 – Jul 2026 | below 2 µg/l 10 Jul 2026 |
| Lead : BLM Bioavailable 3377 | River water | 11 | Oct 2023 – Jul 2026 | 0.11 µg/l 10 Jul 2026 |
| Lead, Dissolved 0052 | River water | 12 | Oct 2023 – Jul 2026 | 0.34 µg/l 10 Jul 2026 |
| Lithium 6064 | River water | 13 | Oct 2023 – Jul 2026 | below 100 µg/l 10 Jul 2026 |
| Lithium, Dissolved 4201 | River water | 12 | Oct 2023 – Jul 2026 | below 100 µg/l 10 Jul 2026 |
| Magnesium 0237 | River water | 13 | Oct 2023 – Jul 2026 | 4.2 mg/l 10 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 12 | Oct 2023 – Jul 2026 | 4.2 mg/l 10 Jul 2026 |
| Manganese 6050 | River water | 13 | Oct 2023 – Jul 2026 | 37 µg/l 10 Jul 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 11 | Oct 2023 – Jul 2026 | 11 µg/l 10 Jul 2026 |
| Manganese, Dissolved 6458 | River water | 12 | Oct 2023 – Jul 2026 | 30 µg/l 10 Jul 2026 |
| MTBE :- {Methyl tert-butyl ether} 6656 | River water | 9 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Nov 2024 – Jul 2025 | below 0.002 µg/l 3 Jul 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Nov 2024 – Jul 2025 | below 0.002 µg/l 3 Jul 2025 |
| National Grid Reference : Whole : Field report 7434 | River water | 3 | Nov 2024 – Jul 2025 | 1 unitless value 3 Jul 2025 |
| Nickel 6462 | River water | 13 | Oct 2023 – Jul 2026 | 3.3 µg/l 10 Jul 2026 |
| Nickel : BLM Bioavailable 3878 | River water | 11 | Oct 2023 – Jul 2026 | 4.2 µg/l 10 Jul 2026 |
| Nickel, Dissolved 3410 | River water | 12 | Oct 2023 – Jul 2026 | 8.8 µg/l 10 Jul 2026 |
| Nitrite as N 0118 | River water | 12 | Oct 2023 – Jul 2026 | 0.36 mg/l 10 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Oct 2023 – Jul 2026 | 2.5 mg/l 10 Jul 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Nov 2024 – Jul 2025 | 0.0022 µg/l 3 Jul 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Nov 2024 – Jul 2025 | 0.0033 µg/l 3 Jul 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Nov 2024 – Jul 2025 | 0.013 µg/l 3 Jul 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Nov 2024 – Jul 2025 | 0.00093 µg/l 3 Jul 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Nov 2024 – Jul 2025 | below 0.005 µg/l 3 Jul 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Nov 2024 – Jul 2025 | below 0.002 µg/l 3 Jul 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Nov 2024 – Jul 2025 | 0.0015 µg/l 3 Jul 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Nov 2024 – Jul 2025 | 0.0013 µg/l 3 Jul 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Nov 2024 – Jul 2025 | 0.006 µg/l 3 Jul 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Nov 2024 – Jul 2025 | 0.0032 µg/l 3 Jul 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Nov 2024 – Jul 2025 | below 0.0005 µg/l 3 Jul 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Nov 2024 – Jul 2025 | below 0.002 µg/l 3 Jul 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Nov 2024 – Jul 2025 | 0.0052 µg/l 3 Jul 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Nov 2024 – Jul 2025 | 0.0055 µg/l 3 Jul 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Nov 2024 – Jul 2025 | 0.0021 µg/l 3 Jul 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Nov 2024 – Jul 2025 | 0.00094 µg/l 3 Jul 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Nov 2024 – Jul 2025 | 0.0028 µg/l 3 Jul 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Nov 2024 – Jul 2025 | below 0.006 µg/l 3 Jul 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Nov 2024 – Jul 2025 | below 0.002 µg/l 3 Jul 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Nov 2024 – Jul 2025 | below 0.004 µg/l 3 Jul 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Nov 2024 – Jul 2025 | below 0.001 µg/l 3 Jul 2025 |
| Potassium 0211 | River water | 13 | Oct 2023 – Jul 2026 | 3.3 mg/l 10 Jul 2026 |
| Potassium, Dissolved 0209 | River water | 12 | Oct 2023 – Jul 2026 | 3.2 mg/l 10 Jul 2026 |
| Salinity : In Situ 7608 | River water | 1 | Nov 2024 – Nov 2024 | 0.25 parts per thousand 18 Nov 2024 |
| Silica, reactive as SiO2 0182 | River water | 12 | Oct 2023 – Jul 2026 | 14 mg/l 10 Jul 2026 |
| Sodium 0207 | River water | 13 | Oct 2023 – Jul 2026 | 24 mg/l 10 Jul 2026 |
| Sodium, Dissolved 0205 | River water | 12 | Oct 2023 – Jul 2026 | 24 mg/l 10 Jul 2026 |
| Strontium 6063 | River water | 13 | Oct 2023 – Jul 2026 | 390 µg/l 10 Jul 2026 |
| Strontium, Filtered 6693 | River water | 12 | Oct 2023 – Jul 2026 | 390 µg/l 10 Jul 2026 |
| Styrene :- {Vinylbenzene} 9888 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Sulphate as SO4 0183 | River water | 13 | Oct 2023 – Jul 2026 | 53 mg/l 10 Jul 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 12 | Oct 2023 – Jul 2026 | 53 mg/l 10 Jul 2026 |
| tert-Amyl methyl ether :- {TAME} 9839 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Toluene :- {Methylbenzene} 3784 | River water | 10 | Oct 2023 – Jul 2026 | 0.15 µg/l 10 Jul 2026 |
| trans-1,2-Dichloroethylene :- {trans-1,2-Dichloroethene} 6539 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Trichloroethylene :- {Trichloroethene} 3334 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Trihalomethanes : Total :- {THM} 1200 | River water | 10 | Oct 2023 – Jul 2026 | 0.78 µg/l 10 Jul 2026 |
| Vinyl chloride :- {Chloroethylene} 6715 | River water | 10 | Oct 2023 – Jul 2026 | below 0.1 µg/l 10 Jul 2026 |
| Visible oil or grease, significant trace: Present/Not found (1/0) 0664 | River water | 2 | Jul 2025 – Jul 2025 | Not found 3 Jul 2025 |
| Zinc 6455 | River water | 13 | Oct 2023 – Jul 2026 | 14 µg/l 10 Jul 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 11 | Oct 2023 – Jul 2026 | 5.3 µg/l 10 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 12 | Oct 2023 – Jul 2026 | 11 µg/l 10 Jul 2026 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | Groundwater - static/unpurged | 1 | Apr 2026 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 1,1,1,2-Tetrachloroethane 6534 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 1,1,1-Trichloroethane 3268 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 1,1,2,2-Tetrachloroethane 7531 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 1,1,2-Trichloroethane 9811 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.5 µg/l 29 Apr 2026 |
| 1,1-Dichloroethane 3269 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 1,1-Dichloroethylene :- {1,1-Dichloroethene} 9836 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 1,2-Dichloroethane 3272 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.002 µg/l 29 Apr 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | Groundwater | 2 | Jul 2024 – Oct 2024 | below 0.002 µg/l 3 Oct 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | Groundwater - static/unpurged | 2 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.004 µg/l 15 Jan 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.004 µg/l 29 Apr 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.005 µg/l 15 Jan 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 5:3 Fluorotelomer betaine 2886 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.004 µg/l 29 Apr 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | 0.0012 µg/l 29 Apr 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.01 µg/l 29 Apr 2026 |
| 6:6 Perfluorophosphinic acid 2883 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.004 µg/l 29 Apr 2026 |
| 6:8 Perfluorophosphinic acid 2882 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.01 µg/l 29 Apr 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | Groundwater - static/unpurged | 1 | Apr 2026 – Apr 2026 | below 0.004 µg/l 29 Apr 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| 8:8 Perfluorophosphinic acid 2879 | Groundwater - static/unpurged | 1 | Nov 2025 – Nov 2025 | below 0.01 µg/l 13 Nov 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 270 mg/l 29 Apr 2026 |
| Aluminium 6057 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 100 µg/l 29 Apr 2026 |
| Aluminium, Dissolved 6037 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 20 µg/l 29 Apr 2026 |
| Barium 6062 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 60 µg/l 29 Apr 2026 |
| Barium, Dissolved 9446 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 58 µg/l 29 Apr 2026 |
| Benzene 3781 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Bicarbonate as HCO3 9584 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 329 mg/l 29 Apr 2026 |
| Boron 6059 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 100 µg/l 29 Apr 2026 |
| Boron, Dissolved 9447 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 100 µg/l 29 Apr 2026 |
| Bromodichloromethane 3282 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Bromoform :- {Tribromomethane} 3283 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.12 µg/l 29 Apr 2026 |
| Cadmium 0108 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Cadmium, Dissolved 0106 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.022 µg/l 29 Apr 2026 |
| Calcium 0241 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 140 mg/l 29 Apr 2026 |
| Calcium, Dissolved 0239 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 140 mg/l 29 Apr 2026 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 3.6 mg/l 29 Apr 2026 |
| Chloride 0172 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 77 mg/l 29 Apr 2026 |
| Chlorobenzene 3290 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Chlorodibromomethane 3292 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Chloroform :- {Trichloromethane} 3373 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Chromium 3164 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.8 µg/l 29 Apr 2026 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | Groundwater | 2 | Jul 2024 – Oct 2024 | 0.62 µg/l 3 Oct 2024 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.23 µg/l 29 Apr 2026 |
| Chromium, Dissolved 3409 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.5 µg/l 29 Apr 2026 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Copper 6452 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 3.2 µg/l 29 Apr 2026 |
| Copper : BLM Bioavailable 4821 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.16 µg/l 29 Apr 2026 |
| Copper, Dissolved 6450 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 1.9 µg/l 29 Apr 2026 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.2 µg/l 29 Apr 2026 |
| Ethyl tert-butyl ether :- {ETBE} 9844 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Ethylbenzene 4117 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Fluoride 0177 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.2 mg/l 29 Apr 2026 |
| Hardness, Total as CaCO3 0158 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 374 mg/l 29 Apr 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Ionic Balance 7044 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 1.42% 29 Apr 2026 |
| Ionic Balance: Dissolved 3386 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 1.38% 29 Apr 2026 |
| Iron 6051 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 220 µg/l 29 Apr 2026 |
| Iron, Dissolved 6460 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 30 µg/l 29 Apr 2026 |
| Lead 0050 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 2 µg/l 29 Apr 2026 |
| Lead : BLM Bioavailable 3377 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.07 µg/l 29 Apr 2026 |
| Lead, Dissolved 0052 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.25 µg/l 29 Apr 2026 |
| Lithium 6064 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 100 µg/l 29 Apr 2026 |
| Lithium, Dissolved 4201 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 100 µg/l 29 Apr 2026 |
| Magnesium 0237 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 6.1 mg/l 29 Apr 2026 |
| Magnesium, Dissolved 0235 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 6 mg/l 29 Apr 2026 |
| Manganese 6050 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 17 µg/l 29 Apr 2026 |
| Manganese : BLM Bioavailable 4820 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 5.7 µg/l 29 Apr 2026 |
| Manganese, Dissolved 6458 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 13 µg/l 29 Apr 2026 |
| MTBE :- {Methyl tert-butyl ether} 6656 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.02 µg/l 15 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.02 µg/l 29 Apr 2026 |
| N-methylperfluorooctanesulfonamide 2975 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.02 µg/l 15 Jan 2025 |
| N-methylperfluorooctanesulfonamide 2975 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.02 µg/l 29 Apr 2026 |
| Nickel 6462 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 3.3 µg/l 29 Apr 2026 |
| Nickel : BLM Bioavailable 3878 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 1.1 µg/l 29 Apr 2026 |
| Nickel, Dissolved 3410 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 2.9 µg/l 29 Apr 2026 |
| Nitrite as N 0118 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.13 mg/l 29 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 4.2 mg/l 29 Apr 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0014 µg/l 15 Jan 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0014 µg/l 29 Apr 2026 |
| Perfluorobutanesulfonic acid 2972 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0037 µg/l 15 Jan 2025 |
| Perfluorobutanesulfonic acid 2972 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0025 µg/l 29 Apr 2026 |
| Perfluorobutanoic acid 2995 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.002 µg/l 15 Jan 2025 |
| Perfluorobutanoic acid 2995 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0075 µg/l 29 Apr 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.00058 µg/l 15 Jan 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.00064 µg/l 29 Apr 2026 |
| Perfluorodecanesulfonic acid 2969 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.002 µg/l 15 Jan 2025 |
| Perfluorodecanesulfonic acid 2969 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Perfluorodecanoic acid 8892 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.002 µg/l 15 Jan 2025 |
| Perfluorodecanoic acid 8892 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.002 µg/l 29 Apr 2026 |
| Perfluorododecane sulfonic acid 2968 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.005 µg/l 15 Jan 2025 |
| Perfluorododecane sulfonic acid 2968 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.005 µg/l 29 Apr 2026 |
| Perfluorododecanoic acid 8894 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.002 µg/l 15 Jan 2025 |
| Perfluorododecanoic acid 8894 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Perfluoroheptanesulfonic acid 2967 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluoroheptanesulfonic acid 2967 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluoroheptanoic acid 8889 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0024 µg/l 15 Jan 2025 |
| Perfluoroheptanoic acid 8889 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0018 µg/l 29 Apr 2026 |
| Perfluorohexane sulfonamido amine 2874 | Groundwater - static/unpurged | 1 | Apr 2026 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluorohexanesulfonamide 2965 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluorohexanesulfonamide 2965 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0011 µg/l 15 Jan 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0012 µg/l 29 Apr 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0048 µg/l 15 Jan 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0042 µg/l 29 Apr 2026 |
| Perfluorohexanoic acid 8888 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0029 µg/l 15 Jan 2025 |
| Perfluorohexanoic acid 8888 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0035 µg/l 29 Apr 2026 |
| Perfluorononanesulfonic acid 2963 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.0005 µg/l 15 Jan 2025 |
| Perfluorononanesulfonic acid 2963 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.0005 µg/l 29 Apr 2026 |
| Perfluorononanoic acid 8891 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| Perfluorononanoic acid 8891 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Perfluorooctadecanoic acid 2962 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.002 µg/l 15 Jan 2025 |
| Perfluorooctadecanoic acid 2962 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.002 µg/l 29 Apr 2026 |
| Perfluorooctanesulfonamide 2961 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.001 µg/l 15 Jan 2025 |
| Perfluorooctanesulfonamide 2961 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0036 µg/l 15 Jan 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0047 µg/l 29 Apr 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0043 µg/l 15 Jan 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0054 µg/l 29 Apr 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | Groundwater - static/unpurged | 2 | Nov 2025 – Apr 2026 | 0.01 µg/l 29 Apr 2026 |
| Perfluorooctanoic acid 8890 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0028 µg/l 15 Jan 2025 |
| Perfluorooctanoic acid 8890 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0026 µg/l 29 Apr 2026 |
| Perfluoropentanesulfonic acid 2957 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0008 µg/l 15 Jan 2025 |
| Perfluoropentanesulfonic acid 2957 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.00081 µg/l 29 Apr 2026 |
| Perfluoropentanoic acid 8887 | Groundwater | 3 | Jul 2024 – Jan 2025 | 0.0029 µg/l 15 Jan 2025 |
| Perfluoropentanoic acid 8887 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | 0.0039 µg/l 29 Apr 2026 |
| Perfluorotetradecanoic acid 8895 | Groundwater | 2 | Oct 2024 – Jan 2025 | below 0.005 µg/l 15 Jan 2025 |
| Perfluorotetradecanoic acid 8895 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.006 µg/l 29 Apr 2026 |
| Perfluorotridecanoic acid 2955 | Groundwater | 2 | Oct 2024 – Jan 2025 | below 0.005 µg/l 15 Jan 2025 |
| Perfluorotridecanoic acid 2955 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.002 µg/l 29 Apr 2026 |
| Perfluoroundecane sulfonic acid 2953 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.004 µg/l 15 Jan 2025 |
| Perfluoroundecane sulfonic acid 2953 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.004 µg/l 29 Apr 2026 |
| Perfluoroundecanoic acid 8893 | Groundwater | 3 | Jul 2024 – Jan 2025 | below 0.002 µg/l 15 Jan 2025 |
| Perfluoroundecanoic acid 8893 | Groundwater - static/unpurged | 3 | Dec 2024 – Apr 2026 | below 0.001 µg/l 29 Apr 2026 |
| Potassium 0211 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 3.4 mg/l 29 Apr 2026 |
| Potassium, Dissolved 0209 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 3.4 mg/l 29 Apr 2026 |
| Silica, reactive as SiO2 0182 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 13 mg/l 29 Apr 2026 |
| Sodium 0207 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 45 mg/l 29 Apr 2026 |
| Sodium, Dissolved 0205 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 45 mg/l 29 Apr 2026 |
| Strontium 6063 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 470 µg/l 29 Apr 2026 |
| Strontium, Filtered 6693 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 470 µg/l 29 Apr 2026 |
| Styrene :- {Vinylbenzene} 9888 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Sulphate as SO4 0183 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 67 mg/l 29 Apr 2026 |
| Sulphate, Dissolved as SO4 7859 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 67 mg/l 29 Apr 2026 |
| tert-Amyl methyl ether :- {TAME} 9839 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.16 µg/l 29 Apr 2026 |
| Toluene :- {Methylbenzene} 3784 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| trans-1,2-Dichloroethylene :- {trans-1,2-Dichloroethene} 6539 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Trichloroethylene :- {Trichloroethene} 3334 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Trihalomethanes : Total :- {THM} 1200 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 0.42 µg/l 29 Apr 2026 |
| Vinyl chloride :- {Chloroethylene} 6715 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | below 0.1 µg/l 29 Apr 2026 |
| Zinc 6455 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 20 µg/l 29 Apr 2026 |
| Zinc : BLM Bioavailable 4822 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 6.2 µg/l 29 Apr 2026 |
| Zinc, Dissolved 3408 | Groundwater - static/unpurged | 4 | Nov 2024 – Apr 2026 | 14 µg/l 29 Apr 2026 |
FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.
Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.
Contains OS data © Crown copyright and database rights 2026.