Salmon Brook above Deephams sewage treatment works
EA name: SALMON BROOK ABOVE DEEPHAMS STW
Environment Agency sampling point TH-PLER0129 · 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
- 3 Sep 2026, 08:2328 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 3 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 535472, 193197As published, to the nearest 1 m. Open in a map
- River, by its own name
- Salmon Brook
- River, by the map
- Not placedTwo watercourses within reach (2 m and 5 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Environmental monitoring statutory (EU directives) (34 samples)
Monitoring (national agency policy) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
59.4%
Sampled 3 Sep 2026, 28 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 59.4 | 59.4% |
| 4 Aug 2026, 10:18 | 59.4 | 59.4% |
| 8 Jul 2026, 08:25 | 26.5 | 26.5% |
| 16 Jun 2026, 07:28 | 31.3 | 31.3% |
| 11 May 2026, 11:13 | 59.2 | 59.2% |
| 15 Apr 2026, 09:20 | 54.1 | 54.1% |
| 12 Mar 2026, 10:05 | 91.1 | 91.1% |
| 2 Feb 2026, 13:15 | 92.1 | 92.1% |
| 8 Jan 2026, 09:15 | 82.6 | 82.6% |
| 5 Dec 2025, 08:49 | 83.6 | 83.6% |
| 10 Nov 2025, 10:31 | 50.2 | 50.2% |
| 16 Oct 2025, 10:33 | 56.7 | 56.7% |
| 4 Sep 2025, 11:43 | 78.3 | 78.3% |
| 20 Aug 2025, 12:58 | 102.7 | 102.7% |
| 16 Jul 2025, 08:26 | 37.7 | 37.7% |
| 11 Jun 2025, 11:46 | 51.8 | 51.8% |
| 19 May 2025, 09:31 | 61.1 | 61.1% |
| 1 Apr 2025, 08:35 | 60.2 | 60.2% |
| 4 Mar 2025, 09:30 | 93.3 | 93.3% |
| 10 Feb 2025, 09:53 | 96.6 | 96.6% |
| 22 Jan 2025, 09:29 | 82.1 | 82.1% |
| 6 Dec 2024, 11:31 | 94.2 | 94.2% |
| 19 Nov 2024, 09:14 | 92.6 | 92.6% |
| 15 Nov 2024, 11:06 | 52.5 | 52.5% |
| 22 Oct 2024, 09:25 | 79.3 | 79.3% |
| 19 Aug 2024, 07:59 | 11.4 | 11.4% |
| 15 Jul 2024, 08:56 | 39.6 | 39.6% |
| 18 Jun 2024, 13:56 | 90.4 | 90.4% |
| 1 Mar 2024, 10:21 | 95.5 | 95.5% |
| 1 Feb 2024, 11:57 | 80.9 | 80.9% |
| 8 Jan 2024, 10:38 | 92.5 | 92.5% |
| 11 Dec 2023, 09:54 | 93.1 | 93.1% |
| 10 Nov 2023, 11:30 | 86 | 86% |
| 3 Oct 2023, 12:32 | 65.6 | 65.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.63 mg/l
Sampled 3 Sep 2026, 28 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 5.63 | 5.63 mg/l |
| 4 Aug 2026, 10:18 | 5.32 | 5.32 mg/l |
| 8 Jul 2026, 08:25 | 2.41 | 2.41 mg/l |
| 16 Jun 2026, 07:28 | 3.1 | 3.1 mg/l |
| 11 May 2026, 11:13 | 6.69 | 6.69 mg/l |
| 15 Apr 2026, 09:20 | 5.8 | 5.8 mg/l |
| 12 Mar 2026, 10:05 | 9.26 | 9.26 mg/l |
| 2 Feb 2026, 13:15 | 10.9 | 10.9 mg/l |
| 8 Jan 2026, 09:15 | 10.8 | 10.8 mg/l |
| 5 Dec 2025, 08:49 | 10.3 | 10.3 mg/l |
| 10 Nov 2025, 10:31 | 5.32 | 5.32 mg/l |
| 16 Oct 2025, 10:33 | 6 | 6 mg/l |
| 4 Sep 2025, 11:43 | 6.98 | 6.98 mg/l |
| 20 Aug 2025, 12:58 | 9.01 | 9.01 mg/l |
| 16 Jul 2025, 08:26 | 3.65 | 3.65 mg/l |
| 11 Jun 2025, 11:46 | 5.18 | 5.18 mg/l |
| 19 May 2025, 09:31 | 6.54 | 6.54 mg/l |
| 1 Apr 2025, 08:35 | 6.96 | 6.96 mg/l |
| 4 Mar 2025, 09:30 | 12 | 12 mg/l |
| 10 Feb 2025, 09:53 | 12.4 | 12.4 mg/l |
| 22 Jan 2025, 09:29 | 10.4 | 10.4 mg/l |
| 6 Dec 2024, 11:31 | 11.1 | 11.1 mg/l |
| 19 Nov 2024, 09:14 | 10.8 | 10.8 mg/l |
| 15 Nov 2024, 11:06 | 5.9 | 5.9 mg/l |
| 22 Oct 2024, 09:25 | 8.61 | 8.61 mg/l |
| 19 Aug 2024, 07:59 | 1.12 | 1.12 mg/l |
| 15 Jul 2024, 08:56 | 3.97 | 3.97 mg/l |
| 18 Jun 2024, 13:56 | 8.43 | 8.43 mg/l |
| 1 Mar 2024, 10:21 | 11.6 | 11.6 mg/l |
| 1 Feb 2024, 11:57 | 9.71 | 9.71 mg/l |
| 8 Jan 2024, 10:38 | 11.7 | 11.7 mg/l |
| 11 Dec 2023, 09:54 | 11 | 11 mg/l |
| 10 Nov 2023, 11:30 | 9.78 | 9.78 mg/l |
| 3 Oct 2023, 12:32 | 6.39 | 6.39 mg/l |
Water temperature
code 0076 · °C
17.8 °C
Sampled 3 Sep 2026, 28 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 17.8 | 17.8 °C |
| 4 Aug 2026, 10:18 | 20.6 | 20.6 °C |
| 8 Jul 2026, 08:25 | 19.9 | 19.9 °C |
| 16 Jun 2026, 07:28 | 15.7 | 15.7 °C |
| 11 May 2026, 11:13 | 9.9 | 9.9 °C |
| 15 Apr 2026, 09:20 | 12.1 | 12.1 °C |
| 12 Mar 2026, 10:05 | 14.5 | 14.5 °C |
| 2 Feb 2026, 13:15 | 8.1 | 8.1 °C |
| 8 Jan 2026, 09:15 | 4 | 4 °C |
| 5 Dec 2025, 08:49 | 6.4 | 6.4 °C |
| 10 Nov 2025, 10:31 | 12.6 | 12.6 °C |
| 16 Oct 2025, 10:33 | 12.7 | 12.7 °C |
| 4 Sep 2025, 11:43 | 20.9 | 20.9 °C |
| 20 Aug 2025, 12:58 | 21.7 | 21.7 °C |
| 16 Jul 2025, 08:26 | 16.8 | 16.8 °C |
| 11 Jun 2025, 11:46 | 15.3 | 15.3 °C |
| 19 May 2025, 09:31 | 12.2 | 12.2 °C |
| 1 Apr 2025, 08:35 | 8.9 | 8.9 °C |
| 4 Mar 2025, 09:30 | 4.6 | 4.6 °C |
| 10 Feb 2025, 09:53 | 4.7 | 4.7 °C |
| 22 Jan 2025, 09:29 | 5.3 | 5.3 °C |
| 6 Dec 2024, 11:31 | 8.1 | 8.1 °C |
| 19 Nov 2024, 09:14 | 8.4 | 8.4 °C |
| 15 Nov 2024, 11:06 | 10.1 | 10.1 °C |
| 22 Oct 2024, 09:25 | 11.6 | 11.6 °C |
| 19 Aug 2024, 07:59 | 15.9 | 15.9 °C |
| 15 Jul 2024, 08:56 | 15.2 | 15.2 °C |
| 18 Jun 2024, 13:56 | 18.6 | 18.6 °C |
| 1 Mar 2024, 10:21 | 6.9 | 6.9 °C |
| 1 Feb 2024, 11:57 | 7.4 | 7.4 °C |
| 8 Jan 2024, 10:38 | 5.4 | 5.4 °C |
| 11 Dec 2023, 09:54 | 8.1 | 8.1 °C |
| 10 Nov 2023, 11:30 | 9.6 | 9.6 °C |
| 3 Oct 2023, 12:32 | 16.5 | 16.5 °C |
pH
code 0061
7.72
Sampled 3 Sep 2026, 28 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 7.72 | 7.72 |
| 4 Aug 2026, 10:18 | 7.68 | 7.68 |
| 8 Jul 2026, 08:25 | 7.63 | 7.63 |
| 16 Jun 2026, 07:28 | 7.56 | 7.56 |
| 11 May 2026, 11:13 | 7.89 | 7.89 |
| 15 Apr 2026, 09:20 | 7.67 | 7.67 |
| 12 Mar 2026, 10:05 | 7.81 | 7.81 |
| 2 Feb 2026, 13:15 | 8.01 | 8.01 |
| 8 Jan 2026, 09:15 | 7.9 | 7.9 |
| 5 Dec 2025, 08:49 | 7.79 | 7.79 |
| 10 Nov 2025, 10:31 | 7.71 | 7.71 |
| 16 Oct 2025, 10:33 | 7.73 | 7.73 |
| 4 Sep 2025, 11:43 | 7.61 | 7.61 |
| 20 Aug 2025, 12:58 | 7.39 | 7.39 |
| 16 Jul 2025, 08:26 | 7.62 | 7.62 |
| 11 Jun 2025, 11:46 | 7.61 | 7.61 |
| 19 May 2025, 09:31 | 7.73 | 7.73 |
| 1 Apr 2025, 08:35 | 7.85 | 7.85 |
| 4 Mar 2025, 09:30 | 7.95 | 7.95 |
| 10 Feb 2025, 09:53 | 7.92 | 7.92 |
| 22 Jan 2025, 09:29 | 7.86 | 7.86 |
| 6 Dec 2024, 11:31 | 8.05 | 8.05 |
| 19 Nov 2024, 09:14 | 7.84 | 7.84 |
| 15 Nov 2024, 11:06 | 7.61 | 7.61 |
| 22 Oct 2024, 09:25 | 7.77 | 7.77 |
| 19 Aug 2024, 07:59 | 7.69 | 7.69 |
| 15 Jul 2024, 08:56 | 7.48 | 7.48 |
| 18 Jun 2024, 13:56 | 7.79 | 7.79 |
| 1 Mar 2024, 10:21 | 7.9 | 7.9 |
| 1 Feb 2024, 11:57 | 8.01 | 8.01 |
| 8 Jan 2024, 10:38 | 8.03 | 8.03 |
| 11 Dec 2023, 09:54 | 8.04 | 8.04 |
| 10 Nov 2023, 11:30 | 7.86 | 7.86 |
| 3 Oct 2023, 12:32 | 7.71 | 7.71 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.19 mg/l
Sampled 3 Sep 2026, 28 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 0.19 | 0.19 mg/l |
| 4 Aug 2026, 10:18 | 0.2 | 0.2 mg/l |
| 8 Jul 2026, 08:25 | 1.4 | 1.4 mg/l |
| 16 Jun 2026, 07:28 | 2.5 | 2.5 mg/l |
| 11 May 2026, 11:13 | 1.4 | 1.4 mg/l |
| 15 Apr 2026, 09:20 | 1.6 | 1.6 mg/l |
| 12 Mar 2026, 10:05 | 0.1 | 0.1 mg/l |
| 2 Feb 2026, 13:15 | 0.14 | 0.14 mg/l |
| 8 Jan 2026, 09:15 | 0.4 | 0.4 mg/l |
| 5 Dec 2025, 08:49 | 0.07 | 0.07 mg/l |
| 10 Nov 2025, 10:31 | 0.26 | 0.26 mg/l |
| 16 Oct 2025, 10:33 | 0.42 | 0.42 mg/l |
| 4 Sep 2025, 11:43 | 0.033 | 0.033 mg/l |
| 20 Aug 2025, 12:58 | 0.031 | 0.031 mg/l |
| 16 Jul 2025, 08:26 | 2.3 | 2.3 mg/l |
| 11 Jun 2025, 11:46 | 2.3 | 2.3 mg/l |
| 19 May 2025, 09:31 | 9.2 | 9.2 mg/l |
| 4 Mar 2025, 09:30 | 0.16 | 0.16 mg/l |
| 10 Feb 2025, 09:53 | 0.089 | 0.089 mg/l |
| 22 Jan 2025, 09:29 | 0.55 | 0.55 mg/l |
| 6 Dec 2024, 11:31 | 0.12 | 0.12 mg/l |
| 19 Nov 2024, 09:14 | 0.19 | 0.19 mg/l |
| 15 Nov 2024, 11:06 | 1.6 | 1.6 mg/l |
| 22 Oct 2024, 09:25 | 0.14 | 0.14 mg/l |
| 19 Aug 2024, 07:59 | 1.3 | 1.3 mg/l |
| 15 Jul 2024, 08:56 | 1 | 1 mg/l |
| 18 Jun 2024, 13:56 | 0.63 | 0.63 mg/l |
| 1 Mar 2024, 10:21 | 0.23 | 0.23 mg/l |
| 8 Jan 2024, 10:38 | 0.14 | 0.14 mg/l |
| 11 Dec 2023, 09:54 | 0.06 | 0.06 mg/l |
| 10 Nov 2023, 11:30 | 0.28 | 0.28 mg/l |
| 3 Oct 2023, 12:32 | 0.15 | 0.15 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.01 mg/l
Sampled 3 Sep 2026, 28 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 3.01 | 3.01 mg/l |
| 4 Aug 2026, 10:18 | 3.55 | 3.55 mg/l |
| 8 Jul 2026, 08:25 | 2.7 | 2.7 mg/l |
| 16 Jun 2026, 07:28 | 2 | 2 mg/l |
| 11 May 2026, 11:13 | 3.99 | 3.99 mg/l |
| 15 Apr 2026, 09:20 | 3.75 | 3.75 mg/l |
| 12 Mar 2026, 10:05 | 19 | 19 mg/l |
| 2 Feb 2026, 13:15 | 2.67 | 2.67 mg/l |
| 8 Jan 2026, 09:15 | 3.82 | 3.82 mg/l |
| 5 Dec 2025, 08:49 | 11.9 | 11.9 mg/l |
| 10 Nov 2025, 10:31 | 3 | 3 mg/l |
| 16 Oct 2025, 10:33 | 3.17 | 3.17 mg/l |
| 4 Sep 2025, 11:43 | 18 | 18 mg/l |
| 20 Aug 2025, 12:58 | 28 | 28 mg/l |
| 16 Jul 2025, 08:26 | 2.27 | 2.27 mg/l |
| 11 Jun 2025, 11:46 | 1.49 | 1.49 mg/l |
| 19 May 2025, 09:31 | 0.32 | 0.32 mg/l |
| 4 Mar 2025, 09:30 | 3.34 | 3.34 mg/l |
| 10 Feb 2025, 09:53 | 2.38 | 2.38 mg/l |
| 22 Jan 2025, 09:29 | 3.55 | 3.55 mg/l |
| 6 Dec 2024, 11:31 | 3.27 | 3.27 mg/l |
| 19 Nov 2024, 09:14 | 3.36 | 3.36 mg/l |
| 15 Nov 2024, 11:06 | 2.53 | 2.53 mg/l |
| 22 Oct 2024, 09:25 | 3.15 | 3.15 mg/l |
| 19 Aug 2024, 07:59 | 0.154 | 0.154 mg/l |
| 15 Jul 2024, 08:56 | 4.61 | 4.61 mg/l |
| 18 Jun 2024, 13:56 | 4.9 | 4.9 mg/l |
| 1 Mar 2024, 10:21 | 1.36 | 1.36 mg/l |
| 1 Feb 2024, 11:57 | 2.8 | 2.8 mg/l |
| 8 Jan 2024, 10:38 | 2.97 | 2.97 mg/l |
| 11 Dec 2023, 09:54 | 2.18 | 2.18 mg/l |
| 10 Nov 2023, 11:30 | 2.53 | 2.53 mg/l |
| 3 Oct 2023, 12:32 | 1.81 | 1.81 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.8 mg/l
Sampled 3 Sep 2026, 28 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 0.8 | 0.8 mg/l |
| 8 Jul 2026, 08:25 | 0.44 | 0.44 mg/l |
| 16 Jun 2026, 07:28 | 0.6 | 0.6 mg/l |
| 11 May 2026, 11:13 | 0.54 | 0.54 mg/l |
| 15 Apr 2026, 09:20 | 0.49 | 0.49 mg/l |
| 12 Mar 2026, 10:05 | 0.62 | 0.62 mg/l |
| 2 Feb 2026, 13:15 | 0.18 | 0.18 mg/l |
| 8 Jan 2026, 09:15 | 0.4 | 0.4 mg/l |
| 5 Dec 2025, 08:49 | 0.22 | 0.22 mg/l |
| 10 Nov 2025, 10:31 | 0.68 | 0.68 mg/l |
| 16 Oct 2025, 10:33 | 0.85 | 0.85 mg/l |
| 4 Sep 2025, 11:43 | 0.57 | 0.57 mg/l |
| 20 Aug 2025, 12:58 | 0.81 | 0.81 mg/l |
| 16 Jul 2025, 08:26 | 0.66 | 0.66 mg/l |
| 11 Jun 2025, 11:46 | 0.51 | 0.51 mg/l |
| 19 May 2025, 09:31 | 1.3 | 1.3 mg/l |
| 4 Mar 2025, 09:30 | 0.28 | 0.28 mg/l |
| 10 Feb 2025, 09:53 | 0.12 | 0.12 mg/l |
| 22 Jan 2025, 09:29 | 0.39 | 0.39 mg/l |
| 6 Dec 2024, 11:31 | 0.14 | 0.14 mg/l |
| 19 Nov 2024, 09:14 | 0.22 | 0.22 mg/l |
| 15 Nov 2024, 11:06 | 0.78 | 0.78 mg/l |
| 22 Oct 2024, 09:25 | 0.28 | 0.28 mg/l |
| 19 Aug 2024, 07:59 | 1.2 | 1.2 mg/l |
| 15 Jul 2024, 08:56 | 0.41 | 0.41 mg/l |
| 18 Jun 2024, 13:56 | 0.28 | 0.28 mg/l |
| 1 Mar 2024, 10:21 | 0.11 | 0.11 mg/l |
| 1 Feb 2024, 11:57 | 0.28 | 0.28 mg/l |
| 8 Jan 2024, 10:38 | 0.14 | 0.14 mg/l |
| 11 Dec 2023, 09:54 | 0.14 | 0.14 mg/l |
| 10 Nov 2023, 11:30 | 0.2 | 0.2 mg/l |
| 3 Oct 2023, 12:32 | 0.55 | 0.55 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
740 µS/cm
Sampled 3 Sep 2026, 28 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Sep 2026, 08:23 | 740 | 740 µS/cm |
| 4 Aug 2026, 10:18 | 806 | 806 µS/cm |
| 8 Jul 2026, 08:25 | 835 | 835 µS/cm |
| 16 Jun 2026, 07:28 | 796 | 796 µS/cm |
| 11 May 2026, 11:13 | 785 | 785 µS/cm |
| 15 Apr 2026, 09:20 | 797 | 797 µS/cm |
| 12 Mar 2026, 10:05 | 1004 | 1004 µS/cm |
| 2 Feb 2026, 13:15 | 481 | 481 µS/cm |
| 8 Jan 2026, 09:15 | 807 | 807 µS/cm |
| 5 Dec 2025, 08:49 | 625 | 625 µS/cm |
| 10 Nov 2025, 10:31 | 734 | 734 µS/cm |
| 16 Oct 2025, 10:33 | 776 | 776 µS/cm |
| 4 Sep 2025, 11:43 | 882 | 882 µS/cm |
| 20 Aug 2025, 12:58 | 1182 | 1182 µS/cm |
| 16 Jul 2025, 08:26 | 805 | 805 µS/cm |
| 11 Jun 2025, 11:46 | 768 | 768 µS/cm |
| 19 May 2025, 09:31 | 859 | 859 µS/cm |
| 1 Apr 2025, 08:35 | 805 | 805 µS/cm |
| 4 Mar 2025, 09:30 | 673 | 673 µS/cm |
| 10 Feb 2025, 09:53 | 363 | 363 µS/cm |
| 22 Jan 2025, 09:29 | 760 | 760 µS/cm |
| 6 Dec 2024, 11:31 | 389 | 389 µS/cm |
| 19 Nov 2024, 09:14 | 354 | 354 µS/cm |
| 15 Nov 2024, 11:06 | 737 | 737 µS/cm |
| 22 Oct 2024, 09:25 | 537 | 537 µS/cm |
| 19 Aug 2024, 07:59 | 755 | 755 µS/cm |
| 15 Jul 2024, 08:56 | 763 | 763 µS/cm |
| 18 Jun 2024, 13:56 | 847 | 847 µS/cm |
| 1 Mar 2024, 10:21 | 407 | 407 µS/cm |
| 1 Feb 2024, 11:57 | 729 | 729 µS/cm |
| 8 Jan 2024, 10:38 | 568 | 568 µS/cm |
| 11 Dec 2023, 09:54 | 463 | 463 µS/cm |
| 10 Nov 2023, 11:30 | 559 | 559 µS/cm |
| 3 Oct 2023, 12:32 | 450 | 450 µS/cm |
Everything measured here
60 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 60 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 34 | Oct 2023 – Sep 2026 | 59.4% 3 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 34 | Oct 2023 – Sep 2026 | 5.63 mg/l 3 Sep 2026 |
| Temperature of Water 0076 | River water | 34 | Oct 2023 – Sep 2026 | 17.8 °C 3 Sep 2026 |
| pH 0061 | River water | 34 | Oct 2023 – Sep 2026 | 7.72 3 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – Sep 2026 | 0.19 mg/l 3 Sep 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Sep 2026 | 3.01 mg/l 3 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 32 | Oct 2023 – Sep 2026 | 0.8 mg/l 3 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 34 | Oct 2023 – Sep 2026 | 740 µS/cm 3 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 3 | May 2024 – Nov 2024 | below 0.004 µg/l 15 Nov 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 3 | May 2024 – Nov 2024 | below 0.005 µg/l 15 Nov 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 33 | Oct 2023 – Sep 2026 | 210 mg/l 3 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 32 | Oct 2023 – Sep 2026 | 0.00326 mg/l 3 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 2.1 mg/l 11 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – Sep 2026 | 0.094 mg/l 3 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Sep 2026 | 3.1 mg/l 3 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 3 | May 2024 – Nov 2024 | 0.0056 µg/l 15 Nov 2024 |
| Perfluorobutanoic acid 2995 | River water | 3 | May 2024 – Nov 2024 | 0.0052 µg/l 15 Nov 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 3 | May 2024 – Nov 2024 | 0.0012 µg/l 15 Nov 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| Perfluorodecanoic acid 8892 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 3 | May 2024 – Nov 2024 | below 0.005 µg/l 15 Nov 2024 |
| Perfluorododecanoic acid 8894 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluoroheptanoic acid 8889 | River water | 3 | May 2024 – Nov 2024 | 0.003 µg/l 15 Nov 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 3 | May 2024 – Nov 2024 | 0.00068 µg/l 15 Nov 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 3 | May 2024 – Nov 2024 | 0.0033 µg/l 15 Nov 2024 |
| Perfluorohexanoic acid 8888 | River water | 3 | May 2024 – Nov 2024 | 0.0065 µg/l 15 Nov 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluorononanoic acid 8891 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | May 2024 – Nov 2024 | below 0.001 µg/l 15 Nov 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | May 2024 – Aug 2024 | 0.0046 µg/l 19 Aug 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | May 2024 – Aug 2024 | 0.0077 µg/l 19 Aug 2024 |
| Perfluorooctanoic acid 8890 | River water | 3 | May 2024 – Nov 2024 | 0.004 µg/l 15 Nov 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 3 | May 2024 – Nov 2024 | below 0.0005 µg/l 15 Nov 2024 |
| Perfluoropentanoic acid 8887 | River water | 3 | May 2024 – Nov 2024 | 0.0073 µg/l 15 Nov 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 3 | May 2024 – Nov 2024 | below 0.006 µg/l 15 Nov 2024 |
| Perfluorotridecanoic acid 2955 | River water | 3 | May 2024 – Nov 2024 | below 0.005 µg/l 15 Nov 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 3 | May 2024 – Nov 2024 | below 0.004 µg/l 15 Nov 2024 |
| Perfluoroundecanoic acid 8893 | River water | 3 | May 2024 – Nov 2024 | below 0.002 µg/l 15 Nov 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.