Udiam downstream of Abbey Petty Sewer
EA name: UDIAM D/S ABBEY PETTY SEWER (also listed as “UDIAM DOWNSTREAM ABBEY PETTY SEWER ON RIVER ROTHER”)
Environment Agency sampling point SO-E0001551 · 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
- 28 May 2026, 11:544 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 30 Sep 2026 and had nothing newer.
- Samples banked
- 32 since 21 Jun 2024 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 577262, 124405As published, to the nearest 1 m. Open in a map
- River, by its own name
- Udiam
- River, by the map
- Not placedIts name gives Udiam; the only line close by, 2 m away, is River Rother and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (20 samples)
Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
85.6%
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 85.6 | 85.6% |
| 13 May 2026, 11:41 | 97.4 | 97.4% |
| 27 Apr 2026, 11:46 | 97.4 | 97.4% |
| 7 Apr 2026, 10:08 | 97.3 | 97.3% |
| 16 Mar 2026, 11:11 | 95.7 | 95.7% |
| 6 Mar 2026, 08:46 | 92.8 | 92.8% |
| 18 Feb 2026, 11:16 | 96.2 | 96.2% |
| 3 Feb 2026, 09:42 | 94 | 94% |
| 19 Jan 2026, 11:57 | 93.6 | 93.6% |
| 6 Jan 2026, 09:46 | 94.9 | 94.9% |
| 17 Dec 2025, 09:36 | 93.2 | 93.2% |
| 2 Dec 2025, 08:32 | 90.8 | 90.8% |
| 17 Nov 2025, 08:32 | 91.3 | 91.3% |
| 6 Nov 2025, 08:48 | 91.4 | 91.4% |
| 14 Oct 2025, 10:27 | 83.5 | 83.5% |
| 3 Oct 2025, 09:44 | 87.2 | 87.2% |
| 2 Sep 2025, 10:26 | 80.2 | 80.2% |
| 1 Aug 2025, 10:25 | 89.6 | 89.6% |
| 11 Jul 2025, 09:53 | 81.2 | 81.2% |
| 4 Jun 2025, 12:09 | 84.1 | 84.1% |
| 19 May 2025, 14:09 | 99.2 | 99.2% |
| 3 Apr 2025, 10:07 | 95.3 | 95.3% |
| 4 Mar 2025, 10:16 | 95.3 | 95.3% |
| 4 Feb 2025, 14:47 | 96.4 | 96.4% |
| 20 Jan 2025, 10:06 | 94.8 | 94.8% |
| 2 Dec 2024, 10:09 | 91.2 | 91.2% |
| 19 Nov 2024, 09:05 | 91.2 | 91.2% |
| 17 Oct 2024, 10:09 | 87.3 | 87.3% |
| 25 Sep 2024, 12:46 | 79.5 | 79.5% |
| 21 Aug 2024, 11:09 | 99 | 99% |
| 16 Jul 2024, 12:40 | 93.6 | 93.6% |
| 21 Jun 2024, 11:46 | 90.8 | 90.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.83 mg/l
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 7.83 | 7.83 mg/l |
| 13 May 2026, 11:41 | 10.8 | 10.8 mg/l |
| 27 Apr 2026, 11:46 | 10.6 | 10.6 mg/l |
| 7 Apr 2026, 10:08 | 11.3 | 11.3 mg/l |
| 16 Mar 2026, 11:11 | 11 | 11 mg/l |
| 6 Mar 2026, 08:46 | 10.8 | 10.8 mg/l |
| 18 Feb 2026, 11:16 | 11.9 | 11.9 mg/l |
| 3 Feb 2026, 09:42 | 11.4 | 11.4 mg/l |
| 19 Jan 2026, 11:57 | 11 | 11 mg/l |
| 6 Jan 2026, 09:46 | 13.8 | 13.8 mg/l |
| 17 Dec 2025, 09:36 | 11 | 11 mg/l |
| 2 Dec 2025, 08:32 | 10.6 | 10.6 mg/l |
| 17 Nov 2025, 08:32 | 10.7 | 10.7 mg/l |
| 6 Nov 2025, 08:48 | 9.65 | 9.65 mg/l |
| 14 Oct 2025, 10:27 | 8.76 | 8.76 mg/l |
| 3 Oct 2025, 09:44 | 9.33 | 9.33 mg/l |
| 2 Sep 2025, 10:26 | 8 | 8 mg/l |
| 1 Aug 2025, 10:25 | 8.71 | 8.71 mg/l |
| 11 Jul 2025, 09:53 | 7.73 | 7.73 mg/l |
| 4 Jun 2025, 12:09 | 8.59 | 8.59 mg/l |
| 19 May 2025, 14:09 | 10.2 | 10.2 mg/l |
| 3 Apr 2025, 10:07 | 10.8 | 10.8 mg/l |
| 4 Mar 2025, 10:16 | 12.3 | 12.3 mg/l |
| 4 Feb 2025, 14:47 | 12 | 12 mg/l |
| 20 Jan 2025, 10:06 | 12.2 | 12.2 mg/l |
| 2 Dec 2024, 10:09 | 10.3 | 10.3 mg/l |
| 19 Nov 2024, 09:05 | 10.5 | 10.5 mg/l |
| 17 Oct 2024, 10:09 | 8.88 | 8.88 mg/l |
| 25 Sep 2024, 12:46 | 8.03 | 8.03 mg/l |
| 21 Aug 2024, 11:09 | 9.73 | 9.73 mg/l |
| 16 Jul 2024, 12:40 | 9.12 | 9.12 mg/l |
| 21 Jun 2024, 11:46 | 9.17 | 9.17 mg/l |
Water temperature
code 0076 · °C
19.6 °C
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 19.6 | 19.6 °C |
| 13 May 2026, 11:41 | 10.7 | 10.7 °C |
| 27 Apr 2026, 11:46 | 11.6 | 11.6 °C |
| 7 Apr 2026, 10:08 | 8.9 | 8.9 °C |
| 16 Mar 2026, 11:11 | 9 | 9 °C |
| 6 Mar 2026, 08:46 | 8.5 | 8.5 °C |
| 18 Feb 2026, 11:16 | 6.2 | 6.2 °C |
| 3 Feb 2026, 09:42 | 6.9 | 6.9 °C |
| 19 Jan 2026, 11:57 | 8.2 | 8.2 °C |
| 6 Jan 2026, 09:46 | 0.2 | 0.2 °C |
| 17 Dec 2025, 09:36 | 8.1 | 8.1 °C |
| 2 Dec 2025, 08:32 | 8.5 | 8.5 °C |
| 17 Nov 2025, 08:32 | 8.5 | 8.5 °C |
| 6 Nov 2025, 08:48 | 12.8 | 12.8 °C |
| 14 Oct 2025, 10:27 | 13.1 | 13.1 °C |
| 3 Oct 2025, 09:44 | 12.2 | 12.2 °C |
| 2 Sep 2025, 10:26 | 15.4 | 15.4 °C |
| 1 Aug 2025, 10:25 | 16.6 | 16.6 °C |
| 11 Jul 2025, 09:53 | 17.6 | 17.6 °C |
| 4 Jun 2025, 12:09 | 14.3 | 14.3 °C |
| 19 May 2025, 14:09 | 14.2 | 14.2 °C |
| 3 Apr 2025, 10:07 | 9.7 | 9.7 °C |
| 4 Mar 2025, 10:16 | 4.7 | 4.7 °C |
| 4 Feb 2025, 14:47 | 6 | 6 °C |
| 20 Jan 2025, 10:06 | 4.5 | 4.5 °C |
| 2 Dec 2024, 10:09 | 9.7 | 9.7 °C |
| 19 Nov 2024, 09:05 | 9.2 | 9.2 °C |
| 17 Oct 2024, 10:09 | 14.5 | 14.5 °C |
| 25 Sep 2024, 12:46 | 14.8 | 14.8 °C |
| 21 Aug 2024, 11:09 | 16.1 | 16.1 °C |
| 16 Jul 2024, 12:40 | 16.5 | 16.5 °C |
| 21 Jun 2024, 11:46 | 14.8 | 14.8 °C |
pH
code 0061
7.66
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 7.66 | 7.66 |
| 13 May 2026, 11:41 | 7.78 | 7.78 |
| 27 Apr 2026, 11:46 | 7.83 | 7.83 |
| 7 Apr 2026, 10:08 | 7.78 | 7.78 |
| 16 Mar 2026, 11:11 | 7.62 | 7.62 |
| 6 Mar 2026, 08:46 | 7.51 | 7.51 |
| 18 Feb 2026, 11:16 | 7.67 | 7.67 |
| 3 Feb 2026, 09:42 | 7.62 | 7.62 |
| 19 Jan 2026, 11:57 | 7.32 | 7.32 |
| 6 Jan 2026, 09:46 | 7.63 | 7.63 |
| 17 Dec 2025, 09:36 | 7.42 | 7.42 |
| 2 Dec 2025, 08:32 | 7.28 | 7.28 |
| 17 Nov 2025, 08:32 | 7.44 | 7.44 |
| 6 Nov 2025, 08:48 | 7.51 | 7.51 |
| 14 Oct 2025, 10:27 | 7.57 | 7.57 |
| 3 Oct 2025, 09:44 | 7.77 | 7.77 |
| 2 Sep 2025, 10:26 | 7.72 | 7.72 |
| 1 Aug 2025, 10:25 | 7.61 | 7.61 |
| 11 Jul 2025, 09:53 | 7.5 | 7.5 |
| 4 Jun 2025, 12:09 | 7.59 | 7.59 |
| 19 May 2025, 14:09 | 7.96 | 7.96 |
| 3 Apr 2025, 10:07 | 7.69 | 7.69 |
| 4 Mar 2025, 10:16 | 7.6 | 7.6 |
| 4 Feb 2025, 14:47 | 7.58 | 7.58 |
| 20 Jan 2025, 10:06 | 7.64 | 7.64 |
| 2 Dec 2024, 10:09 | 7.24 | 7.24 |
| 19 Nov 2024, 09:05 | 7.33 | 7.33 |
| 17 Oct 2024, 10:09 | 7.29 | 7.29 |
| 25 Sep 2024, 12:46 | 7.04 | 7.04 |
| 21 Aug 2024, 11:09 | 7.86 | 7.86 |
| 16 Jul 2024, 12:40 | 7.75 | 7.75 |
| 21 Jun 2024, 11:46 | 7.68 | 7.68 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.056 mg/l
Sampled 28 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 0.056 | 0.056 mg/l |
| 27 Apr 2026, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Apr 2026, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Mar 2026, 11:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2026, 08:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Feb 2026, 11:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2026, 09:42 | 0.035 | 0.035 mg/l |
| 19 Jan 2026, 11:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 09:46 | 0.042 | 0.042 mg/l |
| 17 Dec 2025, 09:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2025, 08:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Nov 2025, 08:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Nov 2025, 08:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 10:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2025, 09:44 | 0.035 | 0.035 mg/l |
| 2 Sep 2025, 10:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2025, 10:25 | 0.032 | 0.032 mg/l |
| 11 Jul 2025, 09:53 | 0.059 | 0.059 mg/l |
| 4 Jun 2025, 12:09 | 0.033 | 0.033 mg/l |
| 19 May 2025, 14:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 10:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 14:47 | 0.044 | 0.044 mg/l |
| 20 Jan 2025, 10:06 | 0.037 | 0.037 mg/l |
| 2 Dec 2024, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Nov 2024, 09:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Oct 2024, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Sep 2024, 12:46 | 0.057 | 0.057 mg/l |
| 21 Aug 2024, 11:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 12:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jun 2024, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.09 mg/l
Sampled 28 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 1.09 | 1.09 mg/l |
| 27 Apr 2026, 11:46 | 1.2 | 1.2 mg/l |
| 7 Apr 2026, 10:08 | 1.2 | 1.2 mg/l |
| 16 Mar 2026, 11:11 | 0.995 | 0.995 mg/l |
| 6 Mar 2026, 08:46 | 1.1 | 1.1 mg/l |
| 18 Feb 2026, 11:16 | 0.995 | 0.995 mg/l |
| 3 Feb 2026, 09:42 | 0.996 | 0.996 mg/l |
| 19 Jan 2026, 11:57 | 1.29 | 1.29 mg/l |
| 6 Jan 2026, 09:46 | 1.39 | 1.39 mg/l |
| 17 Dec 2025, 09:36 | 1.2 | 1.2 mg/l |
| 2 Dec 2025, 08:32 | 1.19 | 1.19 mg/l |
| 17 Nov 2025, 08:32 | 0.996 | 0.996 mg/l |
| 6 Nov 2025, 08:48 | 0.995 | 0.995 mg/l |
| 14 Oct 2025, 10:27 | 0.914 | 0.914 mg/l |
| 3 Oct 2025, 09:44 | 1.19 | 1.19 mg/l |
| 2 Sep 2025, 10:26 | 1.29 | 1.29 mg/l |
| 1 Aug 2025, 10:25 | 1.39 | 1.39 mg/l |
| 11 Jul 2025, 09:53 | 1.29 | 1.29 mg/l |
| 4 Jun 2025, 12:09 | 1.39 | 1.39 mg/l |
| 19 May 2025, 14:09 | 1.39 | 1.39 mg/l |
| 4 Mar 2025, 10:16 | 1.29 | 1.29 mg/l |
| 4 Feb 2025, 14:47 | 1.19 | 1.19 mg/l |
| 20 Jan 2025, 10:06 | 1.49 | 1.49 mg/l |
| 2 Dec 2024, 10:09 | 1.09 | 1.09 mg/l |
| 19 Nov 2024, 09:05 | 1.39 | 1.39 mg/l |
| 17 Oct 2024, 10:09 | 0.865 | 0.865 mg/l |
| 25 Sep 2024, 12:46 | 1.68 | 1.68 mg/l |
| 21 Aug 2024, 11:09 | 1.39 | 1.39 mg/l |
| 16 Jul 2024, 12:40 | 0.995 | 0.995 mg/l |
| 21 Jun 2024, 11:46 | 1.3 | 1.3 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.075 mg/l
Sampled 28 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 0.075 | 0.075 mg/l |
| 27 Apr 2026, 11:46 | 0.045 | 0.045 mg/l |
| 7 Apr 2026, 10:08 | 0.048 | 0.048 mg/l |
| 16 Mar 2026, 11:11 | 0.055 | 0.055 mg/l |
| 6 Mar 2026, 08:46 | 0.038 | 0.038 mg/l |
| 18 Feb 2026, 11:16 | 0.038 | 0.038 mg/l |
| 3 Feb 2026, 09:42 | 0.038 | 0.038 mg/l |
| 19 Jan 2026, 11:57 | 0.046 | 0.046 mg/l |
| 6 Jan 2026, 09:46 | 0.06 | 0.06 mg/l |
| 17 Dec 2025, 09:36 | 0.045 | 0.045 mg/l |
| 2 Dec 2025, 08:32 | 0.042 | 0.042 mg/l |
| 17 Nov 2025, 08:32 | 0.044 | 0.044 mg/l |
| 6 Nov 2025, 08:48 | 0.043 | 0.043 mg/l |
| 14 Oct 2025, 10:27 | 0.1 | 0.1 mg/l |
| 3 Oct 2025, 09:44 | 0.057 | 0.057 mg/l |
| 2 Sep 2025, 10:26 | 0.1 | 0.1 mg/l |
| 1 Aug 2025, 10:25 | 0.17 | 0.17 mg/l |
| 11 Jul 2025, 09:53 | 0.1 | 0.1 mg/l |
| 4 Jun 2025, 12:09 | 0.1 | 0.1 mg/l |
| 19 May 2025, 14:09 | 0.055 | 0.055 mg/l |
| 4 Mar 2025, 10:16 | 0.028 | 0.028 mg/l |
| 4 Feb 2025, 14:47 | 0.034 | 0.034 mg/l |
| 20 Jan 2025, 10:06 | 0.032 | 0.032 mg/l |
| 2 Dec 2024, 10:09 | 0.054 | 0.054 mg/l |
| 19 Nov 2024, 09:05 | 0.062 | 0.062 mg/l |
| 17 Oct 2024, 10:09 | 0.039 | 0.039 mg/l |
| 25 Sep 2024, 12:46 | 0.08 | 0.08 mg/l |
| 21 Aug 2024, 11:09 | 0.064 | 0.064 mg/l |
| 16 Jul 2024, 12:40 | 0.094 | 0.094 mg/l |
| 21 Jun 2024, 11:46 | 0.046 | 0.046 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
436 µS/cm
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 11:54 | 436 | 436 µS/cm |
| 13 May 2026, 11:41 | 421 | 421 µS/cm |
| 27 Apr 2026, 11:46 | 394 | 394 µS/cm |
| 7 Apr 2026, 10:08 | 356 | 356 µS/cm |
| 16 Mar 2026, 11:11 | 297 | 297 µS/cm |
| 6 Mar 2026, 08:46 | 280 | 280 µS/cm |
| 18 Feb 2026, 11:16 | 226 | 226 µS/cm |
| 3 Feb 2026, 09:42 | 214 | 214 µS/cm |
| 19 Jan 2026, 11:57 | 238 | 238 µS/cm |
| 6 Jan 2026, 09:46 | 347 | 347 µS/cm |
| 17 Dec 2025, 09:36 | 296 | 296 µS/cm |
| 2 Dec 2025, 08:32 | 267 | 267 µS/cm |
| 17 Nov 2025, 08:32 | 311 | 311 µS/cm |
| 6 Nov 2025, 08:48 | 313 | 313 µS/cm |
| 14 Oct 2025, 10:27 | 442 | 442 µS/cm |
| 3 Oct 2025, 09:44 | 430 | 430 µS/cm |
| 2 Sep 2025, 10:26 | 402 | 402 µS/cm |
| 1 Aug 2025, 10:25 | 417 | 417 µS/cm |
| 11 Jul 2025, 09:53 | 397 | 397 µS/cm |
| 4 Jun 2025, 12:09 | 413 | 413 µS/cm |
| 19 May 2025, 14:09 | 422 | 422 µS/cm |
| 3 Apr 2025, 10:07 | 368 | 368 µS/cm |
| 4 Mar 2025, 10:16 | 288 | 288 µS/cm |
| 4 Feb 2025, 14:47 | 282 | 282 µS/cm |
| 20 Jan 2025, 10:06 | 303 | 303 µS/cm |
| 2 Dec 2024, 10:09 | 253 | 253 µS/cm |
| 19 Nov 2024, 09:05 | 346 | 346 µS/cm |
| 17 Oct 2024, 10:09 | 195 | 195 µS/cm |
| 25 Sep 2024, 12:46 | 243 | 243 µS/cm |
| 21 Aug 2024, 11:09 | 458 | 458 µS/cm |
| 16 Jul 2024, 12:40 | 405 | 405 µS/cm |
| 21 Jun 2024, 11:46 | 383 | 383 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 | 32 | Jun 2024 – May 2026 | 85.6% 28 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 32 | Jun 2024 – May 2026 | 7.83 mg/l 28 May 2026 |
| Temperature of Water 0076 | River water | 32 | Jun 2024 – May 2026 | 19.6 °C 28 May 2026 |
| pH 0061 | River water | 32 | Jun 2024 – May 2026 | 7.66 28 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Jun 2024 – May 2026 | 0.056 mg/l 28 May 2026 |
| Nitrate as N 0117 | River water | 30 | Jun 2024 – May 2026 | 1.09 mg/l 28 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Jun 2024 – May 2026 | 0.075 mg/l 28 May 2026 |
| Conductivity at 25 C 0077 | River water | 32 | Jun 2024 – May 2026 | 436 µS/cm 28 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 21 Aug 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 21 Aug 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Jun 2024 – May 2026 | 110 mg/l 28 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Jun 2024 – May 2026 | 0.00096 mg/l 28 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 27 | Jun 2024 – May 2026 | below 1 mg/l 28 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| Nitrite as N 0118 | River water | 30 | Jun 2024 – May 2026 | 0.0078 mg/l 28 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Jun 2024 – May 2026 | 1.1 mg/l 28 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Aug 2024 | 0.0016 µg/l 21 Aug 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 21 Aug 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Aug 2024 | 0.00078 µg/l 21 Aug 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Aug 2024 | 0.00075 µg/l 21 Aug 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 21 Aug 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 21 Aug 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Aug 2024 | below 0.006 µg/l 21 Aug 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 21 Aug 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 21 Aug 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 21 Aug 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.