Gaunless at Path 100 m upstream of Holme Mill
EA name: GAUNLESS AT PATH 100M U/S HOLME MILL
Environment Agency sampling point NE-44200116 · 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
- 20 Aug 2026, 09:0342 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 21 since 25 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 416780, 526584As published, to the nearest 1 m. Open in a map
- River, by its own name
- Gaunless
- River, by the map
- River GaunlessPlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- West Auckland On the River Gaunless · 1.8 km along the riverBeside Spring Gardens Dam: too close to say above or below.
- Nearest gauge upstream
- Ramshaw Mill On the River Gaunless · 1.7 km along the river
- Why it was sampled
- Monitoring (national agency policy) (20 samples)
Unplanned reactive monitoring (pollution incidents) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
83.3%
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 83.3 | 83.3% |
| 9 Jul 2026, 07:54 | 92.7 | 92.7% |
| 3 Jun 2026, 11:11 | 92.3 | 92.3% |
| 14 May 2026, 08:40 | 98.9 | 98.9% |
| 16 Apr 2026, 10:23 | 103.8 | 103.8% |
| 5 Mar 2026, 09:33 | 98.9 | 98.9% |
| 5 Feb 2026, 11:09 | 99.5 | 99.5% |
| 9 Jan 2026, 08:59 | 98.2 | 98.2% |
| 3 Dec 2025, 10:03 | 98 | 98% |
| 10 Nov 2025, 09:54 | 91.3 | 91.3% |
| 14 Oct 2025, 10:23 | 92.4 | 92.4% |
| 3 Sep 2025, 09:58 | 92 | 92% |
| 8 Aug 2025, 11:25 | 105.8 | 105.8% |
| 11 Apr 2025, 12:49 | 117.2 | 117.2% |
| 13 Mar 2024, 09:22 | 99.7 | 99.7% |
| 8 Feb 2024, 10:31 | 97.6 | 97.6% |
| 8 Jan 2024, 12:16 | 98.9 | 98.9% |
| 11 Dec 2023, 10:55 | 98.6 | 98.6% |
| 24 Nov 2023, 11:17 | 99.3 | 99.3% |
| 25 Oct 2023, 11:24 | 99.2 | 99.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.58 mg/l
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 8.58 | 8.58 mg/l |
| 9 Jul 2026, 07:54 | 8.94 | 8.94 mg/l |
| 3 Jun 2026, 11:11 | 9.49 | 9.49 mg/l |
| 14 May 2026, 08:40 | 11.8 | 11.8 mg/l |
| 16 Apr 2026, 10:23 | 11.8 | 11.8 mg/l |
| 5 Mar 2026, 09:33 | 12.2 | 12.2 mg/l |
| 5 Feb 2026, 11:09 | 12.5 | 12.5 mg/l |
| 9 Jan 2026, 08:59 | 13 | 13 mg/l |
| 3 Dec 2025, 10:03 | 12.3 | 12.3 mg/l |
| 10 Nov 2025, 09:54 | 10.4 | 10.4 mg/l |
| 14 Oct 2025, 10:23 | 10.3 | 10.3 mg/l |
| 3 Sep 2025, 09:58 | 9.46 | 9.46 mg/l |
| 8 Aug 2025, 11:25 | 10.8 | 10.8 mg/l |
| 11 Apr 2025, 12:49 | 12.8 | 12.8 mg/l |
| 13 Mar 2024, 09:22 | 11.3 | 11.3 mg/l |
| 8 Feb 2024, 10:31 | 12.6 | 12.6 mg/l |
| 8 Jan 2024, 12:16 | 12.4 | 12.4 mg/l |
| 11 Dec 2023, 10:55 | 12.3 | 12.3 mg/l |
| 24 Nov 2023, 11:17 | 12.1 | 12.1 mg/l |
| 25 Oct 2023, 11:24 | 11.3 | 11.3 mg/l |
Water temperature
code 0076 · °C
13.9 °C
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 13.9 | 13.9 °C |
| 9 Jul 2026, 07:54 | 17 | 17 °C |
| 3 Jun 2026, 11:11 | 14 | 14 °C |
| 14 May 2026, 08:40 | 7.8 | 7.8 °C |
| 16 Apr 2026, 10:23 | 9.6 | 9.6 °C |
| 5 Mar 2026, 09:33 | 6.4 | 6.4 °C |
| 5 Feb 2026, 11:09 | 5.5 | 5.5 °C |
| 9 Jan 2026, 08:59 | 3.6 | 3.6 °C |
| 3 Dec 2025, 10:03 | 5.5 | 5.5 °C |
| 10 Nov 2025, 09:54 | 9.5 | 9.5 °C |
| 14 Oct 2025, 10:23 | 10.4 | 10.4 °C |
| 3 Sep 2025, 09:58 | 14 | 14 °C |
| 8 Aug 2025, 11:25 | 14.3 | 14.3 °C |
| 11 Apr 2025, 12:49 | 11.4 | 11.4 °C |
| 13 Mar 2024, 09:22 | 9.6 | 9.6 °C |
| 8 Feb 2024, 10:31 | 4.4 | 4.4 °C |
| 8 Jan 2024, 12:16 | 5.6 | 5.6 °C |
| 11 Dec 2023, 10:55 | 5.8 | 5.8 °C |
| 24 Nov 2023, 11:17 | 6.9 | 6.9 °C |
| 25 Oct 2023, 11:24 | 9.4 | 9.4 °C |
pH
code 0061
8.43
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 8.43 | 8.43 |
| 9 Jul 2026, 07:54 | 8.35 | 8.35 |
| 3 Jun 2026, 11:11 | 8.5 | 8.5 |
| 14 May 2026, 08:40 | 8.52 | 8.52 |
| 16 Apr 2026, 10:23 | 8.24 | 8.24 |
| 5 Mar 2026, 09:33 | 8.14 | 8.14 |
| 5 Feb 2026, 11:09 | 7.17 | 7.17 |
| 9 Jan 2026, 08:59 | 8.14 | 8.14 |
| 3 Dec 2025, 10:03 | 8.08 | 8.08 |
| 10 Nov 2025, 09:54 | 8.07 | 8.07 |
| 14 Oct 2025, 10:23 | 8.09 | 8.09 |
| 3 Sep 2025, 09:58 | 8.2 | 8.2 |
| 8 Aug 2025, 11:25 | 8.49 | 8.49 |
| 11 Apr 2025, 12:49 | 8.67 | 8.67 |
| 13 Mar 2024, 09:22 | 8.13 | 8.13 |
| 8 Feb 2024, 10:31 | 8.08 | 8.08 |
| 8 Jan 2024, 12:16 | 8.2 | 8.2 |
| 11 Dec 2023, 10:55 | 7.72 | 7.72 |
| 24 Nov 2023, 11:17 | 8.16 | 8.16 |
| 25 Oct 2023, 11:24 | 7.88 | 7.88 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2026, 07:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2026, 11:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2026, 08:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 10:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 09:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2026, 11:09 | 0.037 | 0.037 mg/l |
| 9 Jan 2026, 08:59 | 0.31 | 0.31 mg/l |
| 3 Dec 2025, 10:03 | 0.076 | 0.076 mg/l |
| 10 Nov 2025, 09:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 10:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2025, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Apr 2025, 12:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2024, 09:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Feb 2024, 10:31 | 0.047 | 0.047 mg/l |
| 8 Jan 2024, 12:16 | 0.039 | 0.039 mg/l |
| 11 Dec 2023, 10:55 | 0.043 | 0.043 mg/l |
| 24 Nov 2023, 11:17 | 0.03 | 0.03 mg/l |
| 25 Oct 2023, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.48 mg/l
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 3.48 | 3.48 mg/l |
| 9 Jul 2026, 07:54 | 2.79 | 2.79 mg/l |
| 3 Jun 2026, 11:11 | 1.78 | 1.78 mg/l |
| 14 May 2026, 08:40 | 1.79 | 1.79 mg/l |
| 16 Apr 2026, 10:23 | 1.79 | 1.79 mg/l |
| 5 Mar 2026, 09:33 | 2.7 | 2.7 mg/l |
| 5 Feb 2026, 11:09 | 1.79 | 1.79 mg/l |
| 9 Jan 2026, 08:59 | 2.17 | 2.17 mg/l |
| 3 Dec 2025, 10:03 | 8.59 | 8.59 mg/l |
| 10 Nov 2025, 09:54 | 3.39 | 3.39 mg/l |
| 14 Oct 2025, 10:23 | 2.99 | 2.99 mg/l |
| 3 Sep 2025, 09:58 | 4.19 | 4.19 mg/l |
| 8 Aug 2025, 11:25 | 3.79 | 3.79 mg/l |
| 11 Apr 2025, 12:49 | 2.09 | 2.09 mg/l |
| 13 Mar 2024, 09:22 | 1.5 | 1.5 mg/l |
| 8 Feb 2024, 10:31 | 1.79 | 1.79 mg/l |
| 8 Jan 2024, 12:16 | 1.59 | 1.59 mg/l |
| 11 Dec 2023, 10:55 | 1.49 | 1.49 mg/l |
| 24 Nov 2023, 11:17 | 1.59 | 1.59 mg/l |
| 25 Oct 2023, 11:24 | 1.8 | 1.8 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.032 mg/l
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 0.032 | 0.032 mg/l |
| 9 Jul 2026, 07:54 | 0.011 | 0.011 mg/l |
| 3 Jun 2026, 11:11 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 May 2026, 08:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Apr 2026, 10:23 | 0.021 | 0.021 mg/l |
| 5 Mar 2026, 09:33 | 0.058 | 0.058 mg/l |
| 5 Feb 2026, 11:09 | 0.035 | 0.035 mg/l |
| 9 Jan 2026, 08:59 | 0.019 | 0.019 mg/l |
| 3 Dec 2025, 10:03 | 0.049 | 0.049 mg/l |
| 10 Nov 2025, 09:54 | 0.022 | 0.022 mg/l |
| 14 Oct 2025, 10:23 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Sep 2025, 09:58 | 0.012 | 0.012 mg/l |
| 8 Aug 2025, 11:25 | 0.01 | 0.01 mg/l |
| 11 Apr 2025, 12:49 | <0.01 | below 0.01 mg/l (not detected above this) |
| 13 Mar 2024, 09:22 | 0.02 | 0.02 mg/l |
| 8 Feb 2024, 10:31 | 0.011 | 0.011 mg/l |
| 8 Jan 2024, 12:16 | 0.022 | 0.022 mg/l |
| 11 Dec 2023, 10:55 | 0.044 | 0.044 mg/l |
| 24 Nov 2023, 11:17 | 0.016 | 0.016 mg/l |
| 25 Oct 2023, 11:24 | 0.019 | 0.019 mg/l |
Turbidity
code 6396 · NTU
16 NTU
Sampled 20 Aug 2026, 42 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 16 | 16 NTU |
| 9 Jul 2026, 07:54 | 2.3 | 2.3 NTU |
| 3 Jun 2026, 11:11 | 3.5 | 3.5 NTU |
| 14 May 2026, 08:40 | 2.2 | 2.2 NTU |
| 16 Apr 2026, 10:23 | 3 | 3 NTU |
| 5 Mar 2026, 09:33 | 1.7 | 1.7 NTU |
| 5 Feb 2026, 11:09 | 4.5 | 4.5 NTU |
| 9 Jan 2026, 08:59 | 7.1 | 7.1 NTU |
| 3 Dec 2025, 10:03 | 4.3 | 4.3 NTU |
| 10 Nov 2025, 09:54 | 2.9 | 2.9 NTU |
| 14 Oct 2025, 10:23 | 2.9 | 2.9 NTU |
| 8 Aug 2025, 11:25 | 2.5 | 2.5 NTU |
| 11 Apr 2025, 12:49 | 2.9 | 2.9 NTU |
| 13 Mar 2024, 09:22 | 4.4 | 4.4 NTU |
| 8 Feb 2024, 10:31 | 2 | 2 NTU |
| 8 Jan 2024, 12:16 | 3.8 | 3.8 NTU |
| 11 Dec 2023, 10:55 | 12 | 12 NTU |
| 24 Nov 2023, 11:17 | 3.3 | 3.3 NTU |
| 25 Oct 2023, 11:24 | 3.7 | 3.7 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
849 µS/cm
Sampled 20 Aug 2026, 42 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Aug 2026, 09:03 | 849 | 849 µS/cm |
| 9 Jul 2026, 07:54 | 715 | 715 µS/cm |
| 3 Jun 2026, 11:11 | 565 | 565 µS/cm |
| 14 May 2026, 08:40 | 586 | 586 µS/cm |
| 16 Apr 2026, 10:23 | 552 | 552 µS/cm |
| 5 Mar 2026, 09:33 | 682 | 682 µS/cm |
| 5 Feb 2026, 11:09 | 386 | 386 µS/cm |
| 9 Jan 2026, 08:59 | 1374 | 1374 µS/cm |
| 3 Dec 2025, 10:03 | 806 | 806 µS/cm |
| 10 Nov 2025, 09:54 | 619 | 619 µS/cm |
| 14 Oct 2025, 10:23 | 626 | 626 µS/cm |
| 3 Sep 2025, 09:58 | 638 | 638 µS/cm |
| 8 Aug 2025, 11:25 | 681 | 681 µS/cm |
| 11 Apr 2025, 12:49 | 597 | 597 µS/cm |
| 13 Mar 2024, 09:22 | 427 | 427 µS/cm |
| 8 Feb 2024, 10:31 | 489 | 489 µS/cm |
| 8 Jan 2024, 12:16 | 447 | 447 µS/cm |
| 11 Dec 2023, 10:55 | 307 | 307 µS/cm |
| 24 Nov 2023, 11:17 | 456 | 456 µS/cm |
| 25 Oct 2023, 11:24 | 404 | 404 µS/cm |
Everything measured here
98 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 98 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 20 | Oct 2023 – Aug 2026 | 83.3% 20 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Aug 2026 | 8.58 mg/l 20 Aug 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Aug 2026 | 13.9 °C 20 Aug 2026 |
| pH 0061 | River water | 20 | Oct 2023 – Aug 2026 | 8.43 20 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Oct 2023 – Aug 2026 | below 0.03 mg/l 20 Aug 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Aug 2026 | 3.48 mg/l 20 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Oct 2023 – Aug 2026 | 0.032 mg/l 20 Aug 2026 |
| Turbidity 6396 | River water | 19 | Oct 2023 – Aug 2026 | 16 NTU 20 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 20 | Oct 2023 – Aug 2026 | 849 µS/cm 20 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Oct 2023 – Aug 2026 | 120 mg/l 20 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Oct 2023 – Aug 2026 | below 0.00073 mg/l 20 Aug 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 18 | Oct 2023 – Aug 2026 | 19 µg/l 20 Aug 2026 |
| Nitrite as N 0118 | River water | 20 | Oct 2023 – Aug 2026 | 0.017 mg/l 20 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Oct 2023 – Aug 2026 | 3.5 mg/l 20 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 20 | Oct 2023 – Aug 2026 | 33 mg/l 20 Aug 2026 |
| 1,2-Dimethylbenzene : Dry Wt :- {o-Xylene} 7303 | Running surface water sediment | 1 | May 2024 – May 2024 | below 1 microgram per kilogram 9 May 2024 |
| Acenaphthene : Dry Wt 3794 | Running surface water sediment | 1 | May 2024 – May 2024 | 37 microgram per kilogram 9 May 2024 |
| Acenaphthylene : Dry Wt 8382 | Running surface water sediment | 1 | May 2024 – May 2024 | 9.5 microgram per kilogram 9 May 2024 |
| Acid Neutralisation Capacity (pH 4) : Dry Wt 5035 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.3 mole per kilogram 9 May 2024 |
| Anthracene : Dry Wt 3798 | Running surface water sediment | 1 | May 2024 – May 2024 | 33 microgram per kilogram 9 May 2024 |
| Antimony, Leachable 8462 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.01 milligram per kilogram 9 May 2024 |
| Arsenic : Dry Wt 0357 | Running surface water sediment | 1 | May 2024 – May 2024 | 40 milligram per kilogram 9 May 2024 |
| Arsenic, Leachable 7611 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.008 milligram per kilogram 9 May 2024 |
| Barium : Dry Wt 0258 | Running surface water sediment | 1 | May 2024 – May 2024 | 390 milligram per kilogram 9 May 2024 |
| Barium, Leachable : Dry Wt 8246 | Running surface water sediment | 1 | May 2024 – May 2024 | 0.58 milligram per kilogram 9 May 2024 |
| Benzene : Dry Wt 7221 | Running surface water sediment | 1 | May 2024 – May 2024 | below 1 microgram per kilogram 9 May 2024 |
| Benzo(a)Anthracene : Dry Wt 0603 | Running surface water sediment | 1 | May 2024 – May 2024 | 110 microgram per kilogram 9 May 2024 |
| Benzo(a)Pyrene : Dry Wt 3680 | Running surface water sediment | 1 | May 2024 – May 2024 | 76 microgram per kilogram 9 May 2024 |
| Benzo(b)Fluoranthene : Dry Wt 0766 | Running surface water sediment | 1 | May 2024 – May 2024 | 110 microgram per kilogram 9 May 2024 |
| Benzo(g,h,i)Perylene : Dry Wt 0715 | Running surface water sediment | 1 | May 2024 – May 2024 | 120 microgram per kilogram 9 May 2024 |
| Benzo(k)Fluoranthene : Dry Wt 0768 | Running surface water sediment | 1 | May 2024 – May 2024 | 32 microgram per kilogram 9 May 2024 |
| BS EN 12457-2 one stage 10:1 leach test DW 3855 | Running surface water sediment | 1 | May 2024 – May 2024 | Method used 9 May 2024 |
| BS EN 12457-2 one stage 10:1 leach test 3846 | Running surface water sediment | 1 | May 2024 – May 2024 | Method used 9 May 2024 |
| BTEX : Dry Wt :- {Total Benzene Toluene Ethylbenzene and Xylene} 5331 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.0075 milligram per kilogram 9 May 2024 |
| Cadmium : Dry Wt 0254 | Running surface water sediment | 1 | May 2024 – May 2024 | 4.3 milligram per kilogram 9 May 2024 |
| Cadmium, Leachable 9864 | Running surface water sediment | 1 | May 2024 – May 2024 | 0.0011 milligram per kilogram 9 May 2024 |
| Carbon, Organic : Dry Wt as C 7773 | Running surface water sediment | 1 | May 2024 – May 2024 | 3.1% 9 May 2024 |
| Carbon, Organic, Dissolved, Leachable : Dry Wt as C 8107 | Running surface water sediment | 1 | May 2024 – May 2024 | 16 milligram per kilogram 9 May 2024 |
| Chloride, Leachable : Dry Wt 8106 | Running surface water sediment | 1 | May 2024 – May 2024 | below 100 milligram per kilogram 9 May 2024 |
| Chromium : Dry Wt 0376 | Running surface water sediment | 1 | May 2024 – May 2024 | 15 milligram per kilogram 9 May 2024 |
| Chromium, Leachable 9866 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.005 milligram per kilogram 9 May 2024 |
| Chrysene : Dry Wt 3681 | Running surface water sediment | 1 | May 2024 – May 2024 | 160 microgram per kilogram 9 May 2024 |
| Conductivity at 20 C, Leachable 8116 | Running surface water sediment | 1 | May 2024 – May 2024 | 300 µS/cm 9 May 2024 |
| Copper : Dry Wt 0216 | Running surface water sediment | 1 | May 2024 – May 2024 | 41 milligram per kilogram 9 May 2024 |
| Copper, Leachable 9865 | Running surface water sediment | 1 | May 2024 – May 2024 | 0.012 milligram per kilogram 9 May 2024 |
| Coronene : Dry Wt 8453 | Running surface water sediment | 1 | May 2024 – May 2024 | 28 microgram per kilogram 9 May 2024 |
| Cyanide : Free uncomplexed : Dry Wt as CN 3557 | Running surface water sediment | 1 | May 2024 – May 2024 | below 1 milligram per kilogram 9 May 2024 |
| Cyanide : Total : Dry Wt as CN 9942 | Running surface water sediment | 1 | May 2024 – May 2024 | below 1 milligram per kilogram 9 May 2024 |
| Dibenzo(a,h)Anthracene : Dry Wt 3804 | Running surface water sediment | 1 | May 2024 – May 2024 | 23 microgram per kilogram 9 May 2024 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) : Dry Wt 4927 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| Dry Solids at 30 C 9589 | Running surface water sediment | 1 | May 2024 – May 2024 | 95% 9 May 2024 |
| Equiv.carbo No >5-10 : Dry Wt 4797 | Running surface water sediment | 1 | May 2024 – May 2024 | below 4 milligram per kilogram 9 May 2024 |
| Equiv.Carbon No >10-40 : Dry Wt 4809 | Running surface water sediment | 1 | May 2024 – May 2024 | 74 milligram per kilogram 9 May 2024 |
| Ethylbenzene : Dry Wt 7259 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.5 microgram per kilogram 9 May 2024 |
| Fluoranthene : Dry Wt 0737 | Running surface water sediment | 1 | May 2024 – May 2024 | 210 microgram per kilogram 9 May 2024 |
| Fluorene : Dry Wt 7781 | Running surface water sediment | 1 | May 2024 – May 2024 | 51 microgram per kilogram 9 May 2024 |
| Fluoride, Leachable : Dry Wt 9483 | Running surface water sediment | 1 | May 2024 – May 2024 | 2.1 milligram per kilogram 9 May 2024 |
| Indeno(1,2,3-cd)pyrene : Dry Wt 6400 | Running surface water sediment | 1 | May 2024 – May 2024 | 39 microgram per kilogram 9 May 2024 |
| Leaching Method Used 5729 | Running surface water sediment | 1 | May 2024 – May 2024 | EN 12457-2 1-step : L:S 10l:kg : Dry Wt 9 May 2024 |
| Lead : Dry Wt 0329 | Running surface water sediment | 1 | May 2024 – May 2024 | 110 milligram per kilogram 9 May 2024 |
| Lead, Leachable 9868 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.02 milligram per kilogram 9 May 2024 |
| Mercury : Dry Wt 0270 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.1 milligram per kilogram 9 May 2024 |
| Mercury, Leachable 4068 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.01 milligram per kilogram 9 May 2024 |
| Miscellaneous Identification 5000 | Running surface water sediment | 1 | May 2024 – May 2024 | 1 text result 9 May 2024 |
| Molybdenum, Leachable : Dry Wt 9855 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.02 milligram per kilogram 9 May 2024 |
| Naphthalene : Dry Wt 3800 | Running surface water sediment | 1 | May 2024 – May 2024 | 150 microgram per kilogram 9 May 2024 |
| National Grid Reference : Whole : Field report 7434 | Running surface water sediment | 1 | May 2024 – May 2024 | 1 unitless value 9 May 2024 |
| Nickel : Dry Wt 0430 | Running surface water sediment | 1 | May 2024 – May 2024 | 47 milligram per kilogram 9 May 2024 |
| Nickel, Leachable 9870 | Running surface water sediment | 1 | May 2024 – May 2024 | 0.051 milligram per kilogram 9 May 2024 |
| PAH Total: Dry Wt 4383 | Running surface water sediment | 1 | May 2024 – May 2024 | 2.07 milligram per kilogram 9 May 2024 |
| PCB - 028 : Dry Wt 3143 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB - 052 : Dry Wt 3146 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB - 101 : Dry Wt 3149 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB - 118 : Dry Wt 3152 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB - 138 : Dry Wt 3155 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB - 153 : Dry Wt 3158 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB - 180 : Dry Wt 3161 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 microgram per kilogram 9 May 2024 |
| PCB: Total (28,52,101,118,138,153,180): Dry Wt 4382 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.014 milligram per kilogram 9 May 2024 |
| pH : Solid sample 9337 | Running surface water sediment | 1 | May 2024 – May 2024 | 6.6 9 May 2024 |
| pH of Leachate 8115 | Running surface water sediment | 1 | May 2024 – May 2024 | 7.5 9 May 2024 |
| Phenanthrene : Dry Wt 9987 | Running surface water sediment | 1 | May 2024 – May 2024 | 680 microgram per kilogram 9 May 2024 |
| Phenols : Monohydric : Dry Wt 7771 | Running surface water sediment | 1 | May 2024 – May 2024 | below 2 milligram per kilogram 9 May 2024 |
| Phenols, Leachable : Dry Wt as Phenol 8470 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.4 milligram per kilogram 9 May 2024 |
| Potassium, Leachable 8743 | Running surface water sediment | 1 | May 2024 – May 2024 | 3.7 mg/l 9 May 2024 |
| Potassium, Leachable : Dry Wt 8104 | Running surface water sediment | 1 | May 2024 – May 2024 | 37 milligram per kilogram 9 May 2024 |
| Pyrene : Dry Wt 3682 | Running surface water sediment | 1 | May 2024 – May 2024 | 200 microgram per kilogram 9 May 2024 |
| Residual mass: after drying at 105 C 0166 | Running surface water sediment | 1 | May 2024 – May 2024 | 94% 9 May 2024 |
| Sample Analysis : Text Report 8776 | Running surface water sediment | 1 | May 2024 – May 2024 | 1 text result 9 May 2024 |
| Sample Preparation 8394 | Running surface water sediment | 1 | May 2024 – May 2024 | 1 text result 9 May 2024 |
| Selenium, Leachable : Dry Wt 8350 | Running surface water sediment | 1 | May 2024 – May 2024 | below 0.02 milligram per kilogram 9 May 2024 |
| Solids, Total Dissolved, Leachable : Dry Wt 5727 | Running surface water sediment | 1 | May 2024 – May 2024 | 2500 milligram per kilogram 9 May 2024 |
| Solids, Volatile at 500 C 1012 | Running surface water sediment | 1 | May 2024 – May 2024 | 9.1% 9 May 2024 |
| Sulphate, Leachable : Dry Wt as SO4 7706 | Running surface water sediment | 1 | May 2024 – May 2024 | 1200 milligram per kilogram 9 May 2024 |
| Sulphide : Dry Wt 7337 | Running surface water sediment | 1 | May 2024 – May 2024 | 17 milligram per kilogram 9 May 2024 |
| Toluene : Dry Wt :- {Methylbenzene} 7347 | Running surface water sediment | 1 | May 2024 – May 2024 | below 3 microgram per kilogram 9 May 2024 |
| Wet sample weight 4771 | Running surface water sediment | 1 | May 2024 – May 2024 | 90 gram 9 May 2024 |
| Zinc : Dry Wt 0246 | Running surface water sediment | 1 | May 2024 – May 2024 | 910 milligram per kilogram 9 May 2024 |
| Zinc, Leachable 9871 | Running surface water sediment | 1 | May 2024 – May 2024 | 0.096 milligram per kilogram 9 May 2024 |
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.