Sawston Stream Catleys Walk
EA name: SAWSTON STR.CATLEYS WALK
Environment Agency sampling point AN-27M38 · 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
- 7 Aug 2026, 12:3955 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 33 since 11 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 (local monitoring)
- Where
- National Grid 548210, 248640As published, to the nearest 10 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 11 m from the line.
- Next gauge downstream
- Dernford On the River Cam · 3.9 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (33 samples)
2 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
56.4%
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in percentage on another sample material (2EZZ): 16 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 56.4 | 56.4% |
| 15 May 2026, 12:32 | 93.9 | 93.9% |
| 27 Apr 2026, 11:40 | 87.4 | 87.4% |
| 3 Mar 2026, 09:26 | 80.5 | 80.5% |
| 9 Feb 2026, 11:03 | 78.9 | 78.9% |
| 16 Jan 2026, 10:53 | 70.7 | 70.7% |
| 4 Dec 2025, 10:39 | 69.9 | 69.9% |
| 17 Nov 2025, 11:37 | 63.2 | 63.2% |
| 3 Oct 2025, 10:40 | 86.6 | 86.6% |
| 3 Sep 2025, 10:51 | 74.6 | 74.6% |
| 1 Aug 2025, 08:31 | 68.7 | 68.7% |
| 1 Jul 2025, 09:00 | 66.3 | 66.3% |
| 3 Jun 2025, 10:49 | 73.7 | 73.7% |
| 7 May 2025, 13:01 | 86.3 | 86.3% |
| 16 Apr 2025, 09:14 | 91.1 | 91.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.76 mg/l
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in milligram per litre on another sample material (2EZZ): 16 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 5.76 | 5.76 mg/l |
| 15 May 2026, 12:32 | 10.1 | 10.1 mg/l |
| 27 Apr 2026, 11:40 | 9.27 | 9.27 mg/l |
| 3 Mar 2026, 09:26 | 9.11 | 9.11 mg/l |
| 9 Feb 2026, 11:03 | 8.88 | 8.88 mg/l |
| 16 Jan 2026, 10:53 | 8.17 | 8.17 mg/l |
| 4 Dec 2025, 10:39 | 8.04 | 8.04 mg/l |
| 17 Nov 2025, 11:37 | 7.11 | 7.11 mg/l |
| 3 Oct 2025, 10:40 | 8.9 | 8.9 mg/l |
| 3 Sep 2025, 10:51 | 7.36 | 7.36 mg/l |
| 1 Aug 2025, 08:31 | 7.12 | 7.12 mg/l |
| 1 Jul 2025, 09:00 | 6.58 | 6.58 mg/l |
| 3 Jun 2025, 10:49 | 7.81 | 7.81 mg/l |
| 7 May 2025, 13:01 | 9.4 | 9.4 mg/l |
| 16 Apr 2025, 09:14 | 10.1 | 10.1 mg/l |
Water temperature
code 0076 · °C
14.3 °C
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in celsius on another sample material (2EZZ): 16 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 14.3 | 14.3 °C |
| 15 May 2026, 12:32 | 12.1 | 12.1 °C |
| 27 Apr 2026, 11:40 | 12.6 | 12.6 °C |
| 3 Mar 2026, 09:26 | 9.8 | 9.8 °C |
| 9 Feb 2026, 11:03 | 10 | 10 °C |
| 16 Jan 2026, 10:53 | 8.9 | 8.9 °C |
| 4 Dec 2025, 10:39 | 9.1 | 9.1 °C |
| 17 Nov 2025, 11:37 | 10 | 10 °C |
| 3 Oct 2025, 10:40 | 14 | 14 °C |
| 3 Sep 2025, 10:51 | 15.9 | 15.9 °C |
| 1 Aug 2025, 08:31 | 13.6 | 13.6 °C |
| 1 Jul 2025, 09:00 | 15.6 | 15.6 °C |
| 3 Jun 2025, 10:49 | 12.6 | 12.6 °C |
| 7 May 2025, 13:01 | 11.4 | 11.4 °C |
| 16 Apr 2025, 09:14 | 10.5 | 10.5 °C |
pH
code 0061
7.6
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in ph units on another sample material (2EZZ): 16 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 7.6 | 7.6 |
| 15 May 2026, 12:32 | 7.82 | 7.82 |
| 27 Apr 2026, 11:40 | 7.8 | 7.8 |
| 3 Mar 2026, 09:26 | 7.6 | 7.6 |
| 9 Feb 2026, 11:03 | 7.6 | 7.6 |
| 16 Jan 2026, 10:53 | 7.6 | 7.6 |
| 4 Dec 2025, 10:39 | 7.7 | 7.7 |
| 17 Nov 2025, 11:37 | 7.6 | 7.6 |
| 3 Oct 2025, 10:40 | 7.7 | 7.7 |
| 3 Sep 2025, 10:51 | 7.6 | 7.6 |
| 1 Aug 2025, 08:31 | 7.8 | 7.8 |
| 1 Jul 2025, 09:00 | 7.7 | 7.7 |
| 3 Jun 2025, 10:49 | 7.7 | 7.7 |
| 7 May 2025, 13:01 | 7.7 | 7.7 |
| 16 Apr 2025, 09:14 | 7.7 | 7.7 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.065 mg/l
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in milligram per litre on another sample material (2EZZ): 16 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 0.065 | 0.065 mg/l |
| 15 May 2026, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Apr 2026, 11:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2026, 09:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Feb 2026, 11:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jan 2026, 10:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2025, 10:39 | 0.035 | 0.035 mg/l |
| 17 Nov 2025, 11:37 | 0.048 | 0.048 mg/l |
| 3 Oct 2025, 10:40 | 0.14 | 0.14 mg/l |
| 3 Sep 2025, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2025, 08:31 | 0.091 | 0.091 mg/l |
| 1 Jul 2025, 09:00 | 0.11 | 0.11 mg/l |
| 3 Jun 2025, 10:49 | 0.04 | 0.04 mg/l |
| 7 May 2025, 13:01 | 0.039 | 0.039 mg/l |
| 16 Apr 2025, 09:14 | 0.037 | 0.037 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.57 mg/l
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in milligram per litre on another sample material (2EZZ): 15 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 2.57 | 2.57 mg/l |
| 15 May 2026, 12:32 | 7.89 | 7.89 mg/l |
| 27 Apr 2026, 11:40 | 8.59 | 8.59 mg/l |
| 3 Mar 2026, 09:26 | 9.3 | 9.3 mg/l |
| 9 Feb 2026, 11:03 | 8.79 | 8.79 mg/l |
| 16 Jan 2026, 10:53 | 8.19 | 8.19 mg/l |
| 4 Dec 2025, 10:39 | 5.98 | 5.98 mg/l |
| 17 Nov 2025, 11:37 | 2.78 | 2.78 mg/l |
| 3 Oct 2025, 10:40 | 0.867 | 0.867 mg/l |
| 3 Sep 2025, 10:51 | 1.79 | 1.79 mg/l |
| 1 Aug 2025, 08:31 | 1.89 | 1.89 mg/l |
| 1 Jul 2025, 09:00 | 2.08 | 2.08 mg/l |
| 3 Jun 2025, 10:49 | 4.38 | 4.38 mg/l |
| 7 May 2025, 13:01 | 8.19 | 8.19 mg/l |
| 16 Apr 2025, 09:14 | 8.39 | 8.39 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.032 mg/l
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in milligram per litre on another sample material (2EZZ): 15 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 0.032 | 0.032 mg/l |
| 15 May 2026, 12:32 | 0.028 | 0.028 mg/l |
| 27 Apr 2026, 11:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Mar 2026, 09:26 | 0.014 | 0.014 mg/l |
| 9 Feb 2026, 11:03 | 0.018 | 0.018 mg/l |
| 16 Jan 2026, 10:53 | 0.015 | 0.015 mg/l |
| 4 Dec 2025, 10:39 | 0.011 | 0.011 mg/l |
| 17 Nov 2025, 11:37 | 0.015 | 0.015 mg/l |
| 3 Oct 2025, 10:40 | 0.046 | 0.046 mg/l |
| 3 Sep 2025, 10:51 | <0.01 | below 0.01 mg/l (not detected above this) |
| 1 Aug 2025, 08:31 | 0.035 | 0.035 mg/l |
| 1 Jul 2025, 09:00 | 0.039 | 0.039 mg/l |
| 3 Jun 2025, 10:49 | 0.011 | 0.011 mg/l |
| 7 May 2025, 13:01 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Apr 2025, 09:14 | 0.015 | 0.015 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
712 µS/cm
Sampled 4 Jun 2026, 4 months ago · 15 results banked
Also measured in microsiemens per centimetre on another sample material (2EZZ): 16 results, kept apart (see the table).
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Jun 2026, 11:43 | 712 | 712 µS/cm |
| 15 May 2026, 12:32 | 783 | 783 µS/cm |
| 27 Apr 2026, 11:40 | 840 | 840 µS/cm |
| 3 Mar 2026, 09:26 | 845 | 845 µS/cm |
| 9 Feb 2026, 11:03 | 829 | 829 µS/cm |
| 16 Jan 2026, 10:53 | 907 | 907 µS/cm |
| 4 Dec 2025, 10:39 | 889 | 889 µS/cm |
| 17 Nov 2025, 11:37 | 943 | 943 µS/cm |
| 3 Oct 2025, 10:40 | 248 | 248 µS/cm |
| 3 Sep 2025, 10:51 | 634 | 634 µS/cm |
| 1 Aug 2025, 08:31 | 895 | 895 µS/cm |
| 1 Jul 2025, 09:00 | 874 | 874 µS/cm |
| 3 Jun 2025, 10:49 | 879 | 879 µS/cm |
| 7 May 2025, 13:01 | 841 | 841 µS/cm |
| 16 Apr 2025, 09:14 | 782 | 782 µS/cm |
Everything measured here
89 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 177 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 15 | Apr 2025 – Jun 2026 | 56.4% 4 Jun 2026 |
| Oxygen, Dissolved, % Saturation 9901 | Groundwater | 16 | Oct 2023 – Mar 2025 | 93.4% 11 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 15 | Apr 2025 – Jun 2026 | 5.76 mg/l 4 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | Groundwater | 16 | Oct 2023 – Mar 2025 | 10.7 mg/l 11 Mar 2025 |
| Temperature of Water 0076 | River water | 15 | Apr 2025 – Jun 2026 | 14.3 °C 4 Jun 2026 |
| Temperature of Water 0076 | Groundwater | 16 | Oct 2023 – Mar 2025 | 9.3 °C 11 Mar 2025 |
| pH 0061 | River water | 15 | Apr 2025 – Jun 2026 | 7.6 4 Jun 2026 |
| pH 0061 | Groundwater | 16 | Oct 2023 – Mar 2025 | 7.9 11 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Apr 2025 – Jun 2026 | 0.065 mg/l 4 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.03 mg/l 11 Mar 2025 |
| Nitrate as N 0117 | River water | 15 | Apr 2025 – Jun 2026 | 2.57 mg/l 4 Jun 2026 |
| Nitrate as N 0117 | Groundwater | 15 | Oct 2023 – Mar 2025 | 8.9 mg/l 11 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 15 | Apr 2025 – Jun 2026 | 0.032 mg/l 4 Jun 2026 |
| Orthophosphate, reactive as P 0180 | Groundwater | 15 | Oct 2023 – Mar 2025 | 0.028 mg/l 11 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 15 | Apr 2025 – Jun 2026 | 712 µS/cm 4 Jun 2026 |
| Conductivity at 25 C 0077 | Groundwater | 16 | Oct 2023 – Mar 2025 | 806 µS/cm 11 Mar 2025 |
| 1,1,1,2-Tetrachloroethane 6534 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,1,1-Trichloroethane 3268 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,1,2,2-Tetrachloroethane 7531 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,1,2-Trichloroethane 9811 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,1-Dichloroethane 3269 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,1-Dichloroethylene :- {1,1-Dichloroethene} 9836 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,2-Dichloroethane 3272 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 15 | Apr 2025 – Jun 2026 | 210 mg/l 4 Jun 2026 |
| Aluminium 6057 | River water | 14 | Apr 2025 – Jun 2026 | 40 µg/l 4 Jun 2026 |
| Aluminium, Dissolved 6037 | River water | 14 | Apr 2025 – Jun 2026 | below 20 µg/l 4 Jun 2026 |
| Barium 6062 | River water | 14 | Apr 2025 – Jun 2026 | 52 µg/l 4 Jun 2026 |
| Barium, Dissolved 9446 | River water | 14 | Apr 2025 – Jun 2026 | 52 µg/l 4 Jun 2026 |
| Benzene 3781 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Bicarbonate as HCO3 9584 | River water | 15 | Apr 2025 – Jun 2026 | 256 mg/l 4 Jun 2026 |
| Boron 6059 | River water | 14 | Apr 2025 – Jun 2026 | below 100 µg/l 4 Jun 2026 |
| Boron, Dissolved 9447 | River water | 14 | Apr 2025 – Jun 2026 | below 100 µg/l 4 Jun 2026 |
| Bromodichloromethane 3282 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Bromoform :- {Tribromomethane} 3283 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Cadmium 0108 | River water | 14 | Apr 2025 – Jun 2026 | below 0.1 µg/l 4 Jun 2026 |
| Cadmium, Dissolved 0106 | River water | 14 | Apr 2025 – Jun 2026 | below 0.01 µg/l 4 Jun 2026 |
| Calcium 0241 | River water | 14 | Apr 2025 – Jun 2026 | 100 mg/l 4 Jun 2026 |
| Calcium, Dissolved 0239 | River water | 14 | Apr 2025 – Jun 2026 | 110 mg/l 4 Jun 2026 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 15 | Apr 2025 – Jun 2026 | 2.4 mg/l 4 Jun 2026 |
| Chloride 0172 | River water | 15 | Apr 2025 – Jun 2026 | 53 mg/l 4 Jun 2026 |
| Chlorobenzene 3290 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Chlorodibromomethane 3292 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Chloroform :- {Trichloromethane} 3373 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Chromium 3164 | River water | 14 | Apr 2025 – Jun 2026 | below 0.5 µg/l 4 Jun 2026 |
| Chromium, Dissolved 3409 | River water | 14 | Apr 2025 – Jun 2026 | below 0.5 µg/l 4 Jun 2026 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | River water | 10 | Apr 2025 – Jun 2026 | 13 µg/l 4 Jun 2026 |
| Copper 6452 | River water | 14 | Apr 2025 – Jun 2026 | 2 µg/l 4 Jun 2026 |
| Copper : BLM Bioavailable 4821 | River water | 14 | Apr 2025 – Jun 2026 | 0.16 µg/l 4 Jun 2026 |
| Copper, Dissolved 6450 | River water | 14 | Apr 2025 – Jun 2026 | 1.5 µg/l 4 Jun 2026 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | River water | 10 | Apr 2025 – Jun 2026 | below 2 µg/l 4 Jun 2026 |
| Ethyl tert-butyl ether :- {ETBE} 9844 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Ethylbenzene 4117 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Fluoride 0177 | River water | 15 | Apr 2025 – Jun 2026 | 0.17 mg/l 4 Jun 2026 |
| Hardness, Total as CaCO3 0158 | River water | 14 | Apr 2025 – Jun 2026 | 291 mg/l 4 Jun 2026 |
| Ionic Balance 7044 | River water | 14 | Apr 2025 – Jun 2026 | -2.86% 4 Jun 2026 |
| Ionic Balance: Dissolved 3386 | River water | 14 | Apr 2025 – Jun 2026 | 0.745% 4 Jun 2026 |
| Iron 6051 | River water | 14 | Apr 2025 – Jun 2026 | 100 µg/l 4 Jun 2026 |
| Iron, Dissolved 6460 | River water | 14 | Apr 2025 – Jun 2026 | 46 µg/l 4 Jun 2026 |
| Lead 0050 | River water | 14 | Apr 2025 – Jun 2026 | below 2 µg/l 4 Jun 2026 |
| Lead : BLM Bioavailable 3377 | River water | 14 | Apr 2025 – Jun 2026 | 0.12 µg/l 4 Jun 2026 |
| Lead, Dissolved 0052 | River water | 14 | Apr 2025 – Jun 2026 | 0.29 µg/l 4 Jun 2026 |
| Lithium 6064 | River water | 14 | Apr 2025 – Jun 2026 | below 100 µg/l 4 Jun 2026 |
| Lithium, Dissolved 4201 | River water | 14 | Apr 2025 – Jun 2026 | below 100 µg/l 4 Jun 2026 |
| Magnesium 0237 | River water | 14 | Apr 2025 – Jun 2026 | 3.9 mg/l 4 Jun 2026 |
| Magnesium, Dissolved 0235 | River water | 14 | Apr 2025 – Jun 2026 | 3.9 mg/l 4 Jun 2026 |
| Manganese 6050 | River water | 14 | Apr 2025 – Jun 2026 | 27 µg/l 4 Jun 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 14 | Apr 2025 – Jun 2026 | 6.5 µg/l 4 Jun 2026 |
| Manganese, Dissolved 6458 | River water | 14 | Apr 2025 – Jun 2026 | 25 µg/l 4 Jun 2026 |
| MTBE :- {Methyl tert-butyl ether} 6656 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Nickel 6462 | River water | 14 | Apr 2025 – Jun 2026 | 2.1 µg/l 4 Jun 2026 |
| Nickel : BLM Bioavailable 3878 | River water | 14 | Apr 2025 – Jun 2026 | 0.65 µg/l 4 Jun 2026 |
| Nickel, Dissolved 3410 | River water | 14 | Apr 2025 – Jun 2026 | 1.8 µg/l 4 Jun 2026 |
| Nitrite as N 0118 | River water | 15 | Apr 2025 – Jun 2026 | 0.033 mg/l 4 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 15 | Apr 2025 – Jun 2026 | 2.6 mg/l 4 Jun 2026 |
| No flow /No sample 7668 | River water | 2 | Jul 2026 – Aug 2026 | No flow/discharge at sampling point 7 Aug 2026 |
| Potassium 0211 | River water | 14 | Apr 2025 – Jun 2026 | 3 mg/l 4 Jun 2026 |
| Potassium, Dissolved 0209 | River water | 14 | Apr 2025 – Jun 2026 | 3 mg/l 4 Jun 2026 |
| Silica, reactive as SiO2 0182 | River water | 15 | Apr 2025 – Jun 2026 | 14 mg/l 4 Jun 2026 |
| Sodium 0207 | River water | 14 | Apr 2025 – Jun 2026 | 30 mg/l 4 Jun 2026 |
| Sodium, Dissolved 0205 | River water | 14 | Apr 2025 – Jun 2026 | 31 mg/l 4 Jun 2026 |
| Strontium 6063 | River water | 14 | Apr 2025 – Jun 2026 | 510 µg/l 4 Jun 2026 |
| Strontium, Filtered 6693 | River water | 14 | Apr 2025 – Jun 2026 | 520 µg/l 4 Jun 2026 |
| Styrene :- {Vinylbenzene} 9888 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Sulphate as SO4 0183 | River water | 14 | Apr 2025 – Jun 2026 | 58 mg/l 4 Jun 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 14 | Apr 2025 – Jun 2026 | 60 mg/l 4 Jun 2026 |
| tert-Amyl methyl ether :- {TAME} 9839 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | River water | 10 | Apr 2025 – Jun 2026 | 26 µg/l 4 Jun 2026 |
| Toluene :- {Methylbenzene} 3784 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| trans-1,2-Dichloroethylene :- {trans-1,2-Dichloroethene} 6539 | River water | 10 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Trichloroethylene :- {Trichloroethene} 3334 | River water | 10 | Apr 2025 – Jun 2026 | 2.1 µg/l 4 Jun 2026 |
| Trihalomethanes : Total :- {THM} 1200 | River water | 10 | Apr 2025 – Jun 2026 | below 4 µg/l 4 Jun 2026 |
| Vinyl chloride :- {Chloroethylene} 6715 | River water | 11 | Apr 2025 – Jun 2026 | below 1 µg/l 4 Jun 2026 |
| Zinc 6455 | River water | 14 | Apr 2025 – Jun 2026 | 6.5 µg/l 4 Jun 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 14 | Apr 2025 – Jun 2026 | 2.2 µg/l 4 Jun 2026 |
| Zinc, Dissolved 3408 | River water | 14 | Apr 2025 – Jun 2026 | 4.1 µg/l 4 Jun 2026 |
| 1,1,1,2-Tetrachloroethane 6534 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,1,1-Trichloroethane 3268 | Groundwater | 14 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,1,2,2-Tetrachloroethane 7531 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,1,2-Trichloroethane 9811 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,1-Dichloroethane 3269 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,1-Dichloroethylene :- {1,1-Dichloroethene} 9836 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,2-Dichloroethane 3272 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | Groundwater | 16 | Oct 2023 – Mar 2025 | 270 mg/l 11 Mar 2025 |
| Aluminium 6057 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 20 µg/l 11 Mar 2025 |
| Aluminium, Dissolved 6037 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 20 µg/l 11 Mar 2025 |
| Barium 6062 | Groundwater | 16 | Oct 2023 – Mar 2025 | 61 µg/l 11 Mar 2025 |
| Barium, Dissolved 9446 | Groundwater | 16 | Oct 2023 – Mar 2025 | 61 µg/l 11 Mar 2025 |
| Benzene 3781 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Bicarbonate as HCO3 9584 | Groundwater | 16 | Oct 2023 – Mar 2025 | 329 mg/l 11 Mar 2025 |
| Boron 6059 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 100 µg/l 11 Mar 2025 |
| Boron, Dissolved 9447 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 100 µg/l 11 Mar 2025 |
| Bromodichloromethane 3282 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Bromoform :- {Tribromomethane} 3283 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Cadmium 0108 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Cadmium, Dissolved 0106 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.01 µg/l 11 Mar 2025 |
| Calcium 0241 | Groundwater | 16 | Oct 2023 – Mar 2025 | 140 mg/l 11 Mar 2025 |
| Calcium, Dissolved 0239 | Groundwater | 16 | Oct 2023 – Mar 2025 | 140 mg/l 11 Mar 2025 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.4 mg/l 11 Mar 2025 |
| Chloride 0172 | Groundwater | 16 | Oct 2023 – Mar 2025 | 35 mg/l 11 Mar 2025 |
| Chlorobenzene 3290 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Chlorodibromomethane 3292 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Chloroform :- {Trichloromethane} 3373 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Chromium 3164 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.5 µg/l 11 Mar 2025 |
| Chromium, Dissolved 3409 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.5 µg/l 11 Mar 2025 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | Groundwater | 14 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Copper 6452 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.5 µg/l 11 Mar 2025 |
| Copper : BLM Bioavailable 4821 | Groundwater | 16 | Oct 2023 – Mar 2025 | 0.37 µg/l 11 Mar 2025 |
| Copper, Dissolved 6450 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.4 µg/l 11 Mar 2025 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.2 µg/l 11 Mar 2025 |
| Ethyl tert-butyl ether :- {ETBE} 9844 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Ethylbenzene 4117 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Fluoride 0177 | Groundwater | 16 | Oct 2023 – Mar 2025 | 0.17 mg/l 11 Mar 2025 |
| Hardness, Total as CaCO3 0158 | Groundwater | 16 | Oct 2023 – Mar 2025 | 374 mg/l 11 Mar 2025 |
| Ionic Balance 7044 | Groundwater | 15 | Oct 2023 – Mar 2025 | -0.81% 11 Mar 2025 |
| Ionic Balance: Dissolved 3386 | Groundwater | 15 | Oct 2023 – Mar 2025 | -0.81% 11 Mar 2025 |
| Iron 6051 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 30 µg/l 11 Mar 2025 |
| Iron, Dissolved 6460 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 30 µg/l 11 Mar 2025 |
| Lead 0050 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 2 µg/l 11 Mar 2025 |
| Lead : BLM Bioavailable 3377 | Groundwater | 16 | Oct 2023 – Mar 2025 | 0.04 µg/l 11 Mar 2025 |
| Lead, Dissolved 0052 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Lithium 6064 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 100 µg/l 11 Mar 2025 |
| Lithium, Dissolved 4201 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 100 µg/l 11 Mar 2025 |
| Magnesium 0237 | Groundwater | 16 | Oct 2023 – Mar 2025 | 6 mg/l 11 Mar 2025 |
| Magnesium, Dissolved 0235 | Groundwater | 16 | Oct 2023 – Mar 2025 | 6 mg/l 11 Mar 2025 |
| Manganese 6050 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 10 µg/l 11 Mar 2025 |
| Manganese : BLM Bioavailable 4820 | Groundwater | 16 | Oct 2023 – Mar 2025 | 2.3 µg/l 11 Mar 2025 |
| Manganese, Dissolved 6458 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 10 µg/l 11 Mar 2025 |
| MTBE :- {Methyl tert-butyl ether} 6656 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Nickel 6462 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.9 µg/l 11 Mar 2025 |
| Nickel : BLM Bioavailable 3878 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.1 µg/l 11 Mar 2025 |
| Nickel, Dissolved 3410 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.9 µg/l 11 Mar 2025 |
| Nitrite as N 0118 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 0.004 mg/l 11 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | Groundwater | 15 | Oct 2023 – Mar 2025 | 8.9 mg/l 11 Mar 2025 |
| Potassium 0211 | Groundwater | 16 | Oct 2023 – Mar 2025 | 3.8 mg/l 11 Mar 2025 |
| Potassium, Dissolved 0209 | Groundwater | 16 | Oct 2023 – Mar 2025 | 3.8 mg/l 11 Mar 2025 |
| Silica, reactive as SiO2 0182 | Groundwater | 16 | Oct 2023 – Mar 2025 | 16 mg/l 11 Mar 2025 |
| Sodium 0207 | Groundwater | 16 | Oct 2023 – Mar 2025 | 19 mg/l 11 Mar 2025 |
| Sodium, Dissolved 0205 | Groundwater | 16 | Oct 2023 – Mar 2025 | 19 mg/l 11 Mar 2025 |
| Strontium 6063 | Groundwater | 16 | Oct 2023 – Mar 2025 | 620 µg/l 11 Mar 2025 |
| Strontium, Filtered 6693 | Groundwater | 16 | Oct 2023 – Mar 2025 | 620 µg/l 11 Mar 2025 |
| Styrene :- {Vinylbenzene} 9888 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Sulphate as SO4 0183 | Groundwater | 16 | Oct 2023 – Mar 2025 | 73 mg/l 11 Mar 2025 |
| Sulphate, Dissolved as SO4 7859 | Groundwater | 16 | Oct 2023 – Mar 2025 | 73 mg/l 11 Mar 2025 |
| tert-Amyl methyl ether :- {TAME} 9839 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | Groundwater | 15 | Oct 2023 – Mar 2025 | 0.11 µg/l 11 Mar 2025 |
| Toluene :- {Methylbenzene} 3784 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| trans-1,2-Dichloroethylene :- {trans-1,2-Dichloroethene} 6539 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Trichloroethylene :- {Trichloroethene} 3334 | Groundwater | 14 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Trihalomethanes : Total :- {THM} 1200 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.4 µg/l 11 Mar 2025 |
| Vinyl chloride :- {Chloroethylene} 6715 | Groundwater | 15 | Oct 2023 – Mar 2025 | below 0.1 µg/l 11 Mar 2025 |
| Zinc 6455 | Groundwater | 16 | Oct 2023 – Mar 2025 | below 5 µg/l 11 Mar 2025 |
| Zinc : BLM Bioavailable 4822 | Groundwater | 16 | Oct 2023 – Mar 2025 | 0.96 µg/l 11 Mar 2025 |
| Zinc, Dissolved 3408 | Groundwater | 16 | Oct 2023 – Mar 2025 | 1.6 µg/l 11 Mar 2025 |
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.