Upper Witham at High St Footbridge, Colsterworth
EA name: UPPER WITHAM @ HIGH ST FB, COLSTERWORTH (also listed as “RSN1798 UPPER WITHAM AT HIGH STREET FOOTBRIDGE, COLSTERWORTH”)
Environment Agency sampling point AN-RSN1798 · 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
- 1 Sep 2026, 12:2230 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 36 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 Monitoring (national agency policy)
- Where
- National Grid 492841, 323772As published, to the nearest 1 m. Open in a map
- River, by its own name
- Upper Witham
- River, by the map
- River WithamPlaced on a river whose name partly matches its own, 8 m from the line.
- Next gauge downstream
- Colsterworth On the River Witham · 0.9 km along the river
- Nearest gauge upstream
- North Witham On the River Witham · 3.7 km along the river
- Why it was sampled
- Monitoring (national agency policy) (36 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
80.9%
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 80.9 | 80.9% |
| 10 Aug 2026, 10:21 | 78.4 | 78.4% |
| 1 Jul 2026, 10:55 | 89.3 | 89.3% |
| 10 Jun 2026, 08:35 | 86.5 | 86.5% |
| 22 May 2026, 08:46 | 84.9 | 84.9% |
| 14 Apr 2026, 10:27 | 101.8 | 101.8% |
| 9 Mar 2026, 11:52 | 107.3 | 107.3% |
| 2 Feb 2026, 11:30 | 97.6 | 97.6% |
| 6 Jan 2026, 12:36 | 99.5 | 99.5% |
| 1 Dec 2025, 12:44 | 95.6 | 95.6% |
| 3 Nov 2025, 08:58 | 81.1 | 81.1% |
| 1 Oct 2025, 12:02 | 87 | 87% |
| 3 Sep 2025, 11:28 | 86.5 | 86.5% |
| 12 Aug 2025, 12:09 | 96.1 | 96.1% |
| 23 Jul 2025, 11:10 | 82.2 | 82.2% |
| 25 Jun 2025, 12:57 | 98.9 | 98.9% |
| 19 May 2025, 09:49 | 90.1 | 90.1% |
| 25 Apr 2025, 10:18 | 100 | 100% |
| 5 Mar 2025, 11:10 | 105.9 | 105.9% |
| 18 Feb 2025, 13:42 | 103.6 | 103.6% |
| 3 Jan 2025, 09:27 | 96.1 | 96.1% |
| 2 Dec 2024, 09:19 | 93.1 | 93.1% |
| 4 Nov 2024, 09:49 | 87.6 | 87.6% |
| 9 Oct 2024, 09:03 | 81.6 | 81.6% |
| 4 Sep 2024, 11:47 | 98.8 | 98.8% |
| 1 Aug 2024, 12:49 | 96.2 | 96.2% |
| 1 Jul 2024, 08:33 | 85 | 85% |
| 3 Jun 2024, 10:44 | 104.3 | 104.3% |
| 1 May 2024, 12:15 | 121.4 | 121.4% |
| 5 Apr 2024, 12:32 | 102.9 | 102.9% |
| 4 Mar 2024, 12:47 | 103.9 | 103.9% |
| 1 Feb 2024, 12:21 | 103.2 | 103.2% |
| 12 Jan 2024, 09:44 | 94.9 | 94.9% |
| 6 Dec 2023, 11:18 | 96.4 | 96.4% |
| 3 Nov 2023, 11:51 | 89.8 | 89.8% |
| 6 Oct 2023, 09:58 | 76.5 | 76.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.12 mg/l
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 8.12 | 8.12 mg/l |
| 10 Aug 2026, 10:21 | 7.72 | 7.72 mg/l |
| 1 Jul 2026, 10:55 | 8.75 | 8.75 mg/l |
| 10 Jun 2026, 08:35 | 9.41 | 9.41 mg/l |
| 22 May 2026, 08:46 | 8.9 | 8.9 mg/l |
| 14 Apr 2026, 10:27 | 11.9 | 11.9 mg/l |
| 9 Mar 2026, 11:52 | 12.3 | 12.3 mg/l |
| 2 Feb 2026, 11:30 | 11.5 | 11.5 mg/l |
| 6 Jan 2026, 12:36 | 12.5 | 12.5 mg/l |
| 1 Dec 2025, 12:44 | 11.2 | 11.2 mg/l |
| 3 Nov 2025, 08:58 | 9.36 | 9.36 mg/l |
| 1 Oct 2025, 12:02 | 9.46 | 9.46 mg/l |
| 3 Sep 2025, 11:28 | 8.64 | 8.64 mg/l |
| 12 Aug 2025, 12:09 | 9.09 | 9.09 mg/l |
| 23 Jul 2025, 11:10 | 7.99 | 7.99 mg/l |
| 25 Jun 2025, 12:57 | 9.32 | 9.32 mg/l |
| 19 May 2025, 09:49 | 9.96 | 9.96 mg/l |
| 25 Apr 2025, 10:18 | 11.5 | 11.5 mg/l |
| 5 Mar 2025, 11:10 | 12.8 | 12.8 mg/l |
| 18 Feb 2025, 13:42 | 13.2 | 13.2 mg/l |
| 3 Jan 2025, 09:27 | 12.6 | 12.6 mg/l |
| 2 Dec 2024, 09:19 | 10.8 | 10.8 mg/l |
| 4 Nov 2024, 09:49 | 9.82 | 9.82 mg/l |
| 9 Oct 2024, 09:03 | 8.79 | 8.79 mg/l |
| 4 Sep 2024, 11:47 | 10.2 | 10.2 mg/l |
| 1 Aug 2024, 12:49 | 9.25 | 9.25 mg/l |
| 1 Jul 2024, 08:33 | 9.05 | 9.05 mg/l |
| 3 Jun 2024, 10:44 | 10.9 | 10.9 mg/l |
| 1 May 2024, 12:15 | 12.9 | 12.9 mg/l |
| 5 Apr 2024, 12:32 | 11.1 | 11.1 mg/l |
| 4 Mar 2024, 12:47 | 12.4 | 12.4 mg/l |
| 1 Feb 2024, 12:21 | 12.6 | 12.6 mg/l |
| 12 Jan 2024, 09:44 | 11.3 | 11.3 mg/l |
| 6 Dec 2023, 11:18 | 12.3 | 12.3 mg/l |
| 3 Nov 2023, 11:51 | 10.1 | 10.1 mg/l |
| 6 Oct 2023, 09:58 | 8.04 | 8.04 mg/l |
Water temperature
code 0076 · °C
15.1 °C
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 15.1 | 15.1 °C |
| 10 Aug 2026, 10:21 | 16 | 16 °C |
| 1 Jul 2026, 10:55 | 16.2 | 16.2 °C |
| 10 Jun 2026, 08:35 | 11.5 | 11.5 °C |
| 22 May 2026, 08:46 | 13.1 | 13.1 °C |
| 14 Apr 2026, 10:27 | 8.6 | 8.6 °C |
| 9 Mar 2026, 11:52 | 9.2 | 9.2 °C |
| 2 Feb 2026, 11:30 | 8 | 8 °C |
| 6 Jan 2026, 12:36 | 5.6 | 5.6 °C |
| 1 Dec 2025, 12:44 | 8.4 | 8.4 °C |
| 3 Nov 2025, 08:58 | 9 | 9 °C |
| 1 Oct 2025, 12:02 | 11.5 | 11.5 °C |
| 3 Sep 2025, 11:28 | 15.3 | 15.3 °C |
| 12 Aug 2025, 12:09 | 17.9 | 17.9 °C |
| 23 Jul 2025, 11:10 | 16.6 | 16.6 °C |
| 25 Jun 2025, 12:57 | 18.1 | 18.1 °C |
| 19 May 2025, 09:49 | 10.8 | 10.8 °C |
| 25 Apr 2025, 10:18 | 9.1 | 9.1 °C |
| 5 Mar 2025, 11:10 | 7.1 | 7.1 °C |
| 18 Feb 2025, 13:42 | 5 | 5 °C |
| 3 Jan 2025, 09:27 | 3.9 | 3.9 °C |
| 2 Dec 2024, 09:19 | 8.6 | 8.6 °C |
| 4 Nov 2024, 09:49 | 10.2 | 10.2 °C |
| 9 Oct 2024, 09:03 | 11.9 | 11.9 °C |
| 4 Sep 2024, 11:47 | 13.7 | 13.7 °C |
| 1 Aug 2024, 12:49 | 17.1 | 17.1 °C |
| 1 Jul 2024, 08:33 | 12.4 | 12.4 °C |
| 3 Jun 2024, 10:44 | 13.1 | 13.1 °C |
| 1 May 2024, 12:15 | 12.5 | 12.5 °C |
| 5 Apr 2024, 12:32 | 11.8 | 11.8 °C |
| 4 Mar 2024, 12:47 | 7.7 | 7.7 °C |
| 1 Feb 2024, 12:21 | 6.8 | 6.8 °C |
| 12 Jan 2024, 09:44 | 7.6 | 7.6 °C |
| 6 Dec 2023, 11:18 | 5 | 5 °C |
| 3 Nov 2023, 11:51 | 10.1 | 10.1 °C |
| 6 Oct 2023, 09:58 | 13 | 13 °C |
pH
code 0061
7.61
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 7.61 | 7.61 |
| 10 Aug 2026, 10:21 | 7.7 | 7.7 |
| 1 Jul 2026, 10:55 | 7.84 | 7.84 |
| 10 Jun 2026, 08:35 | 7.78 | 7.78 |
| 22 May 2026, 08:46 | 7.71 | 7.71 |
| 14 Apr 2026, 10:27 | 7.96 | 7.96 |
| 9 Mar 2026, 11:52 | 7.93 | 7.93 |
| 2 Feb 2026, 11:30 | 7.85 | 7.85 |
| 6 Jan 2026, 12:36 | 7.84 | 7.84 |
| 1 Dec 2025, 12:44 | 7.92 | 7.92 |
| 3 Nov 2025, 08:58 | 7.92 | 7.92 |
| 1 Oct 2025, 12:02 | 7.88 | 7.88 |
| 3 Sep 2025, 11:28 | 7.91 | 7.91 |
| 12 Aug 2025, 12:09 | 7.79 | 7.79 |
| 23 Jul 2025, 11:10 | 7.75 | 7.75 |
| 25 Jun 2025, 12:57 | 7.78 | 7.78 |
| 19 May 2025, 09:49 | 7.96 | 7.96 |
| 25 Apr 2025, 10:18 | 7.9 | 7.9 |
| 5 Mar 2025, 11:10 | 7.97 | 7.97 |
| 18 Feb 2025, 13:42 | 8.1 | 8.1 |
| 3 Jan 2025, 09:27 | 8.1 | 8.1 |
| 2 Dec 2024, 09:19 | 7.91 | 7.91 |
| 4 Nov 2024, 09:49 | 7.83 | 7.83 |
| 9 Oct 2024, 09:03 | 7.58 | 7.58 |
| 4 Sep 2024, 11:47 | 8.36 | 8.36 |
| 1 Aug 2024, 12:49 | 7.88 | 7.88 |
| 1 Jul 2024, 08:33 | 7.75 | 7.75 |
| 3 Jun 2024, 10:44 | 7.94 | 7.94 |
| 1 May 2024, 12:15 | 8.11 | 8.11 |
| 5 Apr 2024, 12:32 | 8.05 | 8.05 |
| 4 Mar 2024, 12:47 | 8.03 | 8.03 |
| 1 Feb 2024, 12:21 | 7.98 | 7.98 |
| 12 Jan 2024, 09:44 | 7.94 | 7.94 |
| 6 Dec 2023, 11:18 | 7.78 | 7.78 |
| 3 Nov 2023, 11:51 | 7.82 | 7.82 |
| 6 Oct 2023, 09:58 | 7.75 | 7.75 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Aug 2026, 10:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2026, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jun 2026, 08:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2026, 08:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 10:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Mar 2026, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 11:30 | 0.038 | 0.038 mg/l |
| 6 Jan 2026, 12:36 | 0.066 | 0.066 mg/l |
| 1 Dec 2025, 12:44 | 0.032 | 0.032 mg/l |
| 3 Nov 2025, 08:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Oct 2025, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2025, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 12:09 | 0.032 | 0.032 mg/l |
| 23 Jul 2025, 11:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2025, 12:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 May 2025, 09:49 | 0.034 | 0.034 mg/l |
| 25 Apr 2025, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2025, 11:10 | 0.034 | 0.034 mg/l |
| 18 Feb 2025, 13:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jan 2025, 09:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2024, 09:19 | 0.045 | 0.045 mg/l |
| 4 Nov 2024, 09:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2024, 09:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2024, 11:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2024, 12:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2024, 08:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2024, 10:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 May 2024, 12:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Apr 2024, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2024, 12:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Feb 2024, 12:21 | 0.063 | 0.063 mg/l |
| 12 Jan 2024, 09:44 | 0.051 | 0.051 mg/l |
| 6 Dec 2023, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Nov 2023, 11:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2023, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.38 mg/l
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 4.38 | 4.38 mg/l |
| 10 Aug 2026, 10:21 | 5.78 | 5.78 mg/l |
| 1 Jul 2026, 10:55 | 7.48 | 7.48 mg/l |
| 10 Jun 2026, 08:35 | 9.07 | 9.07 mg/l |
| 22 May 2026, 08:46 | 11 | 11 mg/l |
| 14 Apr 2026, 10:27 | 12 | 12 mg/l |
| 9 Mar 2026, 11:52 | 9.96 | 9.96 mg/l |
| 2 Feb 2026, 11:30 | 9.28 | 9.28 mg/l |
| 6 Jan 2026, 12:36 | 11 | 11 mg/l |
| 1 Dec 2025, 12:44 | 14 | 14 mg/l |
| 3 Nov 2025, 08:58 | 8.79 | 8.79 mg/l |
| 1 Oct 2025, 12:02 | 6.19 | 6.19 mg/l |
| 3 Sep 2025, 11:28 | 6.19 | 6.19 mg/l |
| 12 Aug 2025, 12:09 | 6.08 | 6.08 mg/l |
| 23 Jul 2025, 11:10 | 6.58 | 6.58 mg/l |
| 25 Jun 2025, 12:57 | 7.27 | 7.27 mg/l |
| 19 May 2025, 09:49 | 9.77 | 9.77 mg/l |
| 25 Apr 2025, 10:18 | 11 | 11 mg/l |
| 5 Mar 2025, 11:10 | 10.9 | 10.9 mg/l |
| 18 Feb 2025, 13:42 | 11 | 11 mg/l |
| 3 Jan 2025, 09:27 | 11 | 11 mg/l |
| 2 Dec 2024, 09:19 | 11 | 11 mg/l |
| 4 Nov 2024, 09:49 | 9.99 | 9.99 mg/l |
| 9 Oct 2024, 09:03 | 9.19 | 9.19 mg/l |
| 4 Sep 2024, 11:47 | 8.49 | 8.49 mg/l |
| 1 Aug 2024, 12:49 | 8.88 | 8.88 mg/l |
| 1 Jul 2024, 08:33 | 9.77 | 9.77 mg/l |
| 3 Jun 2024, 10:44 | 11 | 11 mg/l |
| 1 May 2024, 12:15 | 11 | 11 mg/l |
| 5 Apr 2024, 12:32 | 8.58 | 8.58 mg/l |
| 4 Mar 2024, 12:47 | 9.58 | 9.58 mg/l |
| 1 Feb 2024, 12:21 | 12.9 | 12.9 mg/l |
| 12 Jan 2024, 09:44 | 12 | 12 mg/l |
| 6 Dec 2023, 11:18 | 9.19 | 9.19 mg/l |
| 3 Nov 2023, 11:51 | 9.09 | 9.09 mg/l |
| 6 Oct 2023, 09:58 | 9.27 | 9.27 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.011 mg/l
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 0.011 | 0.011 mg/l |
| 10 Aug 2026, 10:21 | <0.01 | below 0.01 mg/l (not detected above this) |
| 1 Jul 2026, 10:55 | <0.01 | below 0.01 mg/l (not detected above this) |
| 10 Jun 2026, 08:35 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 May 2026, 08:46 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Apr 2026, 10:27 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Mar 2026, 11:52 | 0.031 | 0.031 mg/l |
| 2 Feb 2026, 11:30 | 0.038 | 0.038 mg/l |
| 6 Jan 2026, 12:36 | 0.018 | 0.018 mg/l |
| 1 Dec 2025, 12:44 | 0.037 | 0.037 mg/l |
| 3 Nov 2025, 08:58 | 0.018 | 0.018 mg/l |
| 1 Oct 2025, 12:02 | 0.011 | 0.011 mg/l |
| 3 Sep 2025, 11:28 | 0.013 | 0.013 mg/l |
| 12 Aug 2025, 12:09 | <0.01 | below 0.01 mg/l (not detected above this) |
| 23 Jul 2025, 11:10 | 0.035 | 0.035 mg/l |
| 25 Jun 2025, 12:57 | 0.014 | 0.014 mg/l |
| 19 May 2025, 09:49 | 0.016 | 0.016 mg/l |
| 25 Apr 2025, 10:18 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Mar 2025, 11:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Feb 2025, 13:42 | 0.021 | 0.021 mg/l |
| 3 Jan 2025, 09:27 | 0.03 | 0.03 mg/l |
| 2 Dec 2024, 09:19 | 0.1 | 0.1 mg/l |
| 4 Nov 2024, 09:49 | 0.12 | 0.12 mg/l |
| 9 Oct 2024, 09:03 | 0.12 | 0.12 mg/l |
| 4 Sep 2024, 11:47 | 0.17 | 0.17 mg/l |
| 1 Aug 2024, 12:49 | 0.057 | 0.057 mg/l |
| 1 Jul 2024, 08:33 | 0.06 | 0.06 mg/l |
| 3 Jun 2024, 10:44 | 0.075 | 0.075 mg/l |
| 1 May 2024, 12:15 | 0.065 | 0.065 mg/l |
| 5 Apr 2024, 12:32 | 0.064 | 0.064 mg/l |
| 4 Mar 2024, 12:47 | 0.071 | 0.071 mg/l |
| 1 Feb 2024, 12:21 | 0.18 | 0.18 mg/l |
| 12 Jan 2024, 09:44 | 0.08 | 0.08 mg/l |
| 6 Dec 2023, 11:18 | 0.058 | 0.058 mg/l |
| 3 Nov 2023, 11:51 | 0.06 | 0.06 mg/l |
| 6 Oct 2023, 09:58 | 0.5 | 0.5 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
904 µS/cm
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 12:22 | 904 | 904 µS/cm |
| 10 Aug 2026, 10:21 | 964 | 964 µS/cm |
| 1 Jul 2026, 10:55 | 939 | 939 µS/cm |
| 10 Jun 2026, 08:35 | 932 | 932 µS/cm |
| 22 May 2026, 08:46 | 898 | 898 µS/cm |
| 14 Apr 2026, 10:27 | 799 | 799 µS/cm |
| 9 Mar 2026, 11:52 | 702 | 702 µS/cm |
| 2 Feb 2026, 11:30 | 675 | 675 µS/cm |
| 6 Jan 2026, 12:36 | 912 | 912 µS/cm |
| 1 Dec 2025, 12:44 | 645 | 645 µS/cm |
| 3 Nov 2025, 08:58 | 949 | 949 µS/cm |
| 1 Oct 2025, 12:02 | 981 | 981 µS/cm |
| 3 Sep 2025, 11:28 | 963 | 963 µS/cm |
| 12 Aug 2025, 12:09 | 984 | 984 µS/cm |
| 23 Jul 2025, 11:10 | 948 | 948 µS/cm |
| 25 Jun 2025, 12:57 | 969 | 969 µS/cm |
| 19 May 2025, 09:49 | 912 | 912 µS/cm |
| 25 Apr 2025, 10:18 | 934 | 934 µS/cm |
| 5 Mar 2025, 11:10 | 836 | 836 µS/cm |
| 18 Feb 2025, 13:42 | 740 | 740 µS/cm |
| 3 Jan 2025, 09:27 | 829 | 829 µS/cm |
| 2 Dec 2024, 09:19 | 709 | 709 µS/cm |
| 4 Nov 2024, 09:49 | 855 | 855 µS/cm |
| 9 Oct 2024, 09:03 | 960 | 960 µS/cm |
| 4 Sep 2024, 11:47 | 1052 | 1052 µS/cm |
| 1 Aug 2024, 12:49 | 930 | 930 µS/cm |
| 1 Jul 2024, 08:33 | 960 | 960 µS/cm |
| 3 Jun 2024, 10:44 | 844 | 844 µS/cm |
| 1 May 2024, 12:15 | 750 | 750 µS/cm |
| 5 Apr 2024, 12:32 | 640 | 640 µS/cm |
| 4 Mar 2024, 12:47 | 710 | 710 µS/cm |
| 1 Feb 2024, 12:21 | 811 | 811 µS/cm |
| 12 Jan 2024, 09:44 | 758 | 758 µS/cm |
| 6 Dec 2023, 11:18 | 516 | 516 µS/cm |
| 3 Nov 2023, 11:51 | 480 | 480 µS/cm |
| 6 Oct 2023, 09:58 | 940 | 940 µS/cm |
Everything measured here
68 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 68 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 36 | Oct 2023 – Sep 2026 | 80.9% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 36 | Oct 2023 – Sep 2026 | 8.12 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 36 | Oct 2023 – Sep 2026 | 15.1 °C 1 Sep 2026 |
| pH 0061 | River water | 36 | Oct 2023 – Sep 2026 | 7.61 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 36 | Oct 2023 – Sep 2026 | below 0.03 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 36 | Oct 2023 – Sep 2026 | 4.38 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 36 | Oct 2023 – Sep 2026 | 0.011 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 36 | Oct 2023 – Sep 2026 | 904 µS/cm 1 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jan 2024 – Sep 2024 | below 0.004 µg/l 4 Sep 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jan 2024 – Sep 2024 | below 0.005 µg/l 4 Sep 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jan 2024 – Sep 2024 | 0.0044 µg/l 4 Sep 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 36 | Oct 2023 – Sep 2026 | 220 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 36 | Oct 2023 – Sep 2026 | below 0.00033 mg/l 1 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 35 | Oct 2023 – Sep 2026 | 4.4 mg/l 1 Sep 2026 |
| Chloride 0172 | River water | 35 | Oct 2023 – Sep 2026 | 36 mg/l 1 Sep 2026 |
| Flow Type 2896 | River water | 25 | Jul 2024 – Sep 2026 | Moderate Flow 1 Sep 2026 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 3 | Feb 2026 – Aug 2026 | 1 text result 10 Aug 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| LCMS Screen : Semi Quantitative 7299 | River water | 1 | Jul 2026 – Jul 2026 | 1 text result 1 Jul 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| Nitrite as N 0118 | River water | 36 | Oct 2023 – Sep 2026 | 0.017 mg/l 1 Sep 2026 |
| Nitrogen, Total as N 9686 | River water | 36 | Oct 2023 – Sep 2026 | 4.9 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 36 | Oct 2023 – Sep 2026 | 4.4 mg/l 1 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Sep 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jan 2024 – Sep 2024 | 0.0011 µg/l 4 Sep 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Sep 2024 – Sep 2024 | 0.0014 µg/l 4 Sep 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jan 2024 – Sep 2024 | below 0.005 µg/l 4 Sep 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jan 2024 – Sep 2024 | 0.00092 µg/l 4 Sep 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Sep 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jan 2024 – Sep 2024 | below 0.001 µg/l 4 Sep 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Sep 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jan 2024 – Sep 2024 | 0.00086 µg/l 4 Sep 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jan 2024 – Sep 2024 | below 0.0005 µg/l 4 Sep 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jan 2024 – Sep 2024 | 0.0011 µg/l 4 Sep 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jan 2024 – Sep 2024 | below 0.006 µg/l 4 Sep 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jan 2024 – Sep 2024 | below 0.005 µg/l 4 Sep 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jan 2024 – Sep 2024 | below 0.004 µg/l 4 Sep 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jan 2024 – Sep 2024 | below 0.002 µg/l 4 Sep 2024 |
| Phosphorus, Total as P 0348 | River water | 36 | Oct 2023 – Sep 2026 | 0.025 mg/l 1 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 36 | Oct 2023 – Sep 2026 | 6.2 mg/l 1 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 10 | Dec 2025 – Sep 2026 | 3.2 mg/l 1 Sep 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.