River Blythe - Sandalls Bridge
EA name: RIVER BLYTHE - SANDALLS BRIDGE
Environment Agency sampling point MD-61648150 · 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 Aug 2026, 10:3334 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 33 since 9 Apr 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 416357, 278953As published, to the nearest 1 m. Open in a map
- River, by its own name
- Blythe
- River, by the map
- River BlythePlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Nearest gauge upstream
- Cheswick Green On the River Blythe · 6.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (33 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
70.5%
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 70.5 | 70.5% |
| 31 Jul 2026, 08:12 | 71.6 | 71.6% |
| 19 Jun 2026, 09:04 | 75.3 | 75.3% |
| 29 May 2026, 07:54 | 65.4 | 65.4% |
| 11 May 2026, 13:04 | 96.7 | 96.7% |
| 13 Apr 2026, 14:35 | 110.2 | 110.2% |
| 1 Apr 2026, 12:14 | 101 | 101% |
| 25 Mar 2026, 14:03 | 103 | 103% |
| 13 Mar 2026, 08:13 | 89.7 | 89.7% |
| 26 Feb 2026, 13:32 | 94.6 | 94.6% |
| 2 Feb 2026, 11:53 | 92.3 | 92.3% |
| 28 Jan 2026, 08:47 | 90.7 | 90.7% |
| 8 Jan 2026, 11:28 | 88 | 88% |
| 18 Dec 2025, 13:18 | 90.2 | 90.2% |
| 11 Dec 2025, 09:52 | 93.3 | 93.3% |
| 19 Nov 2025, 12:45 | 84.5 | 84.5% |
| 13 Nov 2025, 15:00 | 76.7 | 76.7% |
| 14 Oct 2025, 14:05 | 86.1 | 86.1% |
| 14 Oct 2025, 14:04 | 88 | 88% |
| 29 Sep 2025, 10:01 | 83.7 | 83.7% |
| 29 Aug 2025, 07:53 | 75.3 | 75.3% |
| 30 Jul 2025, 14:28 | 80.7 | 80.7% |
| 26 Jun 2025, 12:51 | 74.1 | 74.1% |
| 9 May 2025, 15:13 | 94.2 | 94.2% |
| 1 Apr 2025, 12:16 | 98.5 | 98.5% |
| 11 Mar 2025, 13:27 | 98.3 | 98.3% |
| 13 Feb 2025, 11:56 | 95.6 | 95.6% |
| 8 Jan 2025, 14:02 | 95.7 | 95.7% |
| 10 Dec 2024, 13:00 | 90.9 | 90.9% |
| 11 Nov 2024, 12:53 | 86.3 | 86.3% |
| 21 Oct 2024, 13:52 | 89.7 | 89.7% |
| 16 Sep 2024, 13:23 | 88.7 | 88.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.75 mg/l
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 6.75 | 6.75 mg/l |
| 31 Jul 2026, 08:12 | 7.06 | 7.06 mg/l |
| 19 Jun 2026, 09:04 | 7.24 | 7.24 mg/l |
| 29 May 2026, 07:54 | 6.41 | 6.41 mg/l |
| 11 May 2026, 13:04 | 10.7 | 10.7 mg/l |
| 13 Apr 2026, 14:35 | 12.2 | 12.2 mg/l |
| 1 Apr 2026, 12:14 | 11.4 | 11.4 mg/l |
| 25 Mar 2026, 14:03 | 11.9 | 11.9 mg/l |
| 13 Mar 2026, 08:13 | 11 | 11 mg/l |
| 26 Feb 2026, 13:32 | 10.7 | 10.7 mg/l |
| 2 Feb 2026, 11:53 | 11.2 | 11.2 mg/l |
| 28 Jan 2026, 08:47 | 11.8 | 11.8 mg/l |
| 8 Jan 2026, 11:28 | 11.6 | 11.6 mg/l |
| 18 Dec 2025, 13:18 | 10.5 | 10.5 mg/l |
| 11 Dec 2025, 09:52 | 11 | 11 mg/l |
| 19 Nov 2025, 12:45 | 10.3 | 10.3 mg/l |
| 13 Nov 2025, 15:00 | 8.17 | 8.17 mg/l |
| 14 Oct 2025, 14:05 | 9.24 | 9.24 mg/l |
| 14 Oct 2025, 14:04 | 9.46 | 9.46 mg/l |
| 29 Sep 2025, 10:01 | 9.41 | 9.41 mg/l |
| 29 Aug 2025, 07:53 | 7.62 | 7.62 mg/l |
| 30 Jul 2025, 14:28 | 7.67 | 7.67 mg/l |
| 26 Jun 2025, 12:51 | 6.73 | 6.73 mg/l |
| 9 May 2025, 15:13 | 9.95 | 9.95 mg/l |
| 1 Apr 2025, 12:16 | 11.2 | 11.2 mg/l |
| 11 Mar 2025, 13:27 | 11.7 | 11.7 mg/l |
| 13 Feb 2025, 11:56 | 12.2 | 12.2 mg/l |
| 8 Jan 2025, 14:02 | 12.7 | 12.7 mg/l |
| 10 Dec 2024, 13:00 | 11 | 11 mg/l |
| 11 Nov 2024, 12:53 | 9.59 | 9.59 mg/l |
| 21 Oct 2024, 13:52 | 9.51 | 9.51 mg/l |
| 16 Sep 2024, 13:23 | 8.79 | 8.79 mg/l |
Water temperature
code 0076 · °C
17.3 °C
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 17.3 | 17.3 °C |
| 31 Jul 2026, 08:12 | 15.9 | 15.9 °C |
| 19 Jun 2026, 09:04 | 17.1 | 17.1 °C |
| 29 May 2026, 07:54 | 16.2 | 16.2 °C |
| 11 May 2026, 13:04 | 10.7 | 10.7 °C |
| 13 Apr 2026, 14:35 | 10.8 | 10.8 °C |
| 1 Apr 2026, 12:14 | 10 | 10 °C |
| 25 Mar 2026, 14:03 | 9.1 | 9.1 °C |
| 13 Mar 2026, 08:13 | 6.4 | 6.4 °C |
| 26 Feb 2026, 13:32 | 9.8 | 9.8 °C |
| 2 Feb 2026, 11:53 | 7 | 7 °C |
| 28 Jan 2026, 08:47 | 4.4 | 4.4 °C |
| 8 Jan 2026, 11:28 | 3.8 | 3.8 °C |
| 18 Dec 2025, 13:18 | 8.7 | 8.7 °C |
| 11 Dec 2025, 09:52 | 8 | 8 °C |
| 19 Nov 2025, 12:45 | 6.9 | 6.9 °C |
| 13 Nov 2025, 15:00 | 12.4 | 12.4 °C |
| 14 Oct 2025, 14:05 | 12.1 | 12.1 °C |
| 14 Oct 2025, 14:04 | 12 | 12 °C |
| 29 Sep 2025, 10:01 | 10.1 | 10.1 °C |
| 29 Aug 2025, 07:53 | 14.7 | 14.7 °C |
| 30 Jul 2025, 14:28 | 17.7 | 17.7 °C |
| 26 Jun 2025, 12:51 | 19.9 | 19.9 °C |
| 9 May 2025, 15:13 | 12.8 | 12.8 °C |
| 1 Apr 2025, 12:16 | 9.6 | 9.6 °C |
| 11 Mar 2025, 13:27 | 7.7 | 7.7 °C |
| 13 Feb 2025, 11:56 | 4.9 | 4.9 °C |
| 8 Jan 2025, 14:02 | 3.5 | 3.5 °C |
| 10 Dec 2024, 13:00 | 7.1 | 7.1 °C |
| 11 Nov 2024, 12:53 | 10.6 | 10.6 °C |
| 21 Oct 2024, 13:52 | 12.6 | 12.6 °C |
| 16 Sep 2024, 13:23 | 15.7 | 15.7 °C |
pH
code 0061
7.3
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 7.3 | 7.3 |
| 31 Jul 2026, 08:12 | 7.57 | 7.57 |
| 19 Jun 2026, 09:04 | 7.74 | 7.74 |
| 29 May 2026, 07:54 | 7.61 | 7.61 |
| 11 May 2026, 13:04 | 7.95 | 7.95 |
| 13 Apr 2026, 14:35 | 7.89 | 7.89 |
| 1 Apr 2026, 12:14 | 7.92 | 7.92 |
| 25 Mar 2026, 14:03 | 8.15 | 8.15 |
| 13 Mar 2026, 08:13 | 7.75 | 7.75 |
| 26 Feb 2026, 13:32 | 8.08 | 8.08 |
| 2 Feb 2026, 11:53 | 7.82 | 7.82 |
| 28 Jan 2026, 08:47 | 7.9 | 7.9 |
| 8 Jan 2026, 11:28 | 7.78 | 7.78 |
| 18 Dec 2025, 13:18 | 7.56 | 7.56 |
| 11 Dec 2025, 09:52 | 7.9 | 7.9 |
| 19 Nov 2025, 12:45 | 7.58 | 7.58 |
| 13 Nov 2025, 15:00 | 7.49 | 7.49 |
| 14 Oct 2025, 14:05 | 8 | 8 |
| 14 Oct 2025, 14:04 | 8.02 | 8.02 |
| 29 Sep 2025, 10:01 | 7.71 | 7.71 |
| 29 Aug 2025, 07:53 | 7.75 | 7.75 |
| 30 Jul 2025, 14:28 | 7.73 | 7.73 |
| 26 Jun 2025, 12:51 | 7.62 | 7.62 |
| 9 May 2025, 15:13 | 7.94 | 7.94 |
| 1 Apr 2025, 12:16 | 8 | 8 |
| 11 Mar 2025, 13:27 | 8.08 | 8.08 |
| 13 Feb 2025, 11:56 | 7.83 | 7.83 |
| 8 Jan 2025, 14:02 | 7.73 | 7.73 |
| 10 Dec 2024, 13:00 | 7.71 | 7.71 |
| 11 Nov 2024, 12:53 | 7.76 | 7.76 |
| 21 Oct 2024, 13:52 | 7.57 | 7.57 |
| 16 Sep 2024, 13:23 | 7.83 | 7.83 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.14 mg/l
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 0.14 | 0.14 mg/l |
| 31 Jul 2026, 08:12 | 0.049 | 0.049 mg/l |
| 19 Jun 2026, 09:04 | 0.048 | 0.048 mg/l |
| 29 May 2026, 07:54 | 0.12 | 0.12 mg/l |
| 11 May 2026, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Apr 2026, 14:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2026, 12:14 | 0.059 | 0.059 mg/l |
| 25 Mar 2026, 14:03 | 0.082 | 0.082 mg/l |
| 13 Mar 2026, 08:13 | 0.077 | 0.077 mg/l |
| 26 Feb 2026, 13:32 | 0.16 | 0.16 mg/l |
| 2 Feb 2026, 11:53 | 0.094 | 0.094 mg/l |
| 28 Jan 2026, 08:47 | 0.07 | 0.07 mg/l |
| 8 Jan 2026, 11:28 | 0.65 | 0.65 mg/l |
| 18 Dec 2025, 13:18 | 0.04 | 0.04 mg/l |
| 11 Dec 2025, 09:52 | 0.042 | 0.042 mg/l |
| 19 Nov 2025, 12:45 | 0.083 | 0.083 mg/l |
| 13 Nov 2025, 15:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 14:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 14:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Sep 2025, 10:01 | 0.065 | 0.065 mg/l |
| 29 Aug 2025, 07:53 | 0.1 | 0.1 mg/l |
| 30 Jul 2025, 14:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jun 2025, 12:51 | 0.065 | 0.065 mg/l |
| 9 May 2025, 15:13 | 0.043 | 0.043 mg/l |
| 1 Apr 2025, 12:16 | 0.062 | 0.062 mg/l |
| 11 Mar 2025, 13:27 | 0.14 | 0.14 mg/l |
| 13 Feb 2025, 11:56 | 0.11 | 0.11 mg/l |
| 8 Jan 2025, 14:02 | 0.085 | 0.085 mg/l |
| 10 Dec 2024, 13:00 | 0.07 | 0.07 mg/l |
| 11 Nov 2024, 12:53 | 0.096 | 0.096 mg/l |
| 21 Oct 2024, 13:52 | 0.033 | 0.033 mg/l |
| 16 Sep 2024, 13:23 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.42 mg/l
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 2.42 | 2.42 mg/l |
| 31 Jul 2026, 08:12 | 1.29 | 1.29 mg/l |
| 19 Jun 2026, 09:04 | 1.28 | 1.28 mg/l |
| 29 May 2026, 07:54 | 1.25 | 1.25 mg/l |
| 11 May 2026, 13:04 | 1.87 | 1.87 mg/l |
| 13 Apr 2026, 14:35 | 1.98 | 1.98 mg/l |
| 1 Apr 2026, 12:14 | 1.97 | 1.97 mg/l |
| 25 Mar 2026, 14:03 | 1.77 | 1.77 mg/l |
| 13 Mar 2026, 08:13 | 1.09 | 1.09 mg/l |
| 26 Feb 2026, 13:32 | 1.67 | 1.67 mg/l |
| 2 Feb 2026, 11:53 | 1.68 | 1.68 mg/l |
| 28 Jan 2026, 08:47 | 1.99 | 1.99 mg/l |
| 8 Jan 2026, 11:28 | 2.34 | 2.34 mg/l |
| 18 Dec 2025, 13:18 | 1.79 | 1.79 mg/l |
| 11 Dec 2025, 09:52 | 1.99 | 1.99 mg/l |
| 19 Nov 2025, 12:45 | 1.88 | 1.88 mg/l |
| 13 Nov 2025, 15:00 | 2.68 | 2.68 mg/l |
| 14 Oct 2025, 14:05 | 1.89 | 1.89 mg/l |
| 14 Oct 2025, 14:04 | 1.89 | 1.89 mg/l |
| 29 Sep 2025, 10:01 | 1.88 | 1.88 mg/l |
| 29 Aug 2025, 07:53 | 1.67 | 1.67 mg/l |
| 30 Jul 2025, 14:28 | 1.39 | 1.39 mg/l |
| 26 Jun 2025, 12:51 | 1.38 | 1.38 mg/l |
| 9 May 2025, 15:13 | 1.97 | 1.97 mg/l |
| 1 Apr 2025, 12:16 | 2.48 | 2.48 mg/l |
| 11 Mar 2025, 13:27 | 2.37 | 2.37 mg/l |
| 13 Feb 2025, 11:56 | 1.78 | 1.78 mg/l |
| 8 Jan 2025, 14:02 | 1.88 | 1.88 mg/l |
| 10 Dec 2024, 13:00 | 1.48 | 1.48 mg/l |
| 11 Nov 2024, 12:53 | 2.61 | 2.61 mg/l |
| 21 Oct 2024, 13:52 | 1.19 | 1.19 mg/l |
| 16 Sep 2024, 13:23 | 2.19 | 2.19 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.19 mg/l
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 0.19 | 0.19 mg/l |
| 31 Jul 2026, 08:12 | 0.36 | 0.36 mg/l |
| 19 Jun 2026, 09:04 | 0.25 | 0.25 mg/l |
| 29 May 2026, 07:54 | 0.21 | 0.21 mg/l |
| 11 May 2026, 13:04 | 0.14 | 0.14 mg/l |
| 13 Apr 2026, 14:35 | 0.064 | 0.064 mg/l |
| 1 Apr 2026, 12:14 | 0.041 | 0.041 mg/l |
| 25 Mar 2026, 14:03 | 0.074 | 0.074 mg/l |
| 13 Mar 2026, 08:13 | 0.1 | 0.1 mg/l |
| 26 Feb 2026, 13:32 | 0.12 | 0.12 mg/l |
| 2 Feb 2026, 11:53 | 0.1 | 0.1 mg/l |
| 28 Jan 2026, 08:47 | 0.13 | 0.13 mg/l |
| 8 Jan 2026, 11:28 | 0.089 | 0.089 mg/l |
| 18 Dec 2025, 13:18 | 0.11 | 0.11 mg/l |
| 11 Dec 2025, 09:52 | 0.11 | 0.11 mg/l |
| 19 Nov 2025, 12:45 | 0.081 | 0.081 mg/l |
| 13 Nov 2025, 15:00 | 0.12 | 0.12 mg/l |
| 14 Oct 2025, 14:05 | 0.22 | 0.22 mg/l |
| 14 Oct 2025, 14:04 | 0.23 | 0.23 mg/l |
| 29 Sep 2025, 10:01 | 0.18 | 0.18 mg/l |
| 29 Aug 2025, 07:53 | 0.27 | 0.27 mg/l |
| 30 Jul 2025, 14:28 | 0.31 | 0.31 mg/l |
| 26 Jun 2025, 12:51 | 0.5 | 0.5 mg/l |
| 9 May 2025, 15:13 | 0.17 | 0.17 mg/l |
| 1 Apr 2025, 12:16 | 0.069 | 0.069 mg/l |
| 11 Mar 2025, 13:27 | 0.088 | 0.088 mg/l |
| 13 Feb 2025, 11:56 | 0.13 | 0.13 mg/l |
| 8 Jan 2025, 14:02 | 0.14 | 0.14 mg/l |
| 10 Dec 2024, 13:00 | 0.13 | 0.13 mg/l |
| 11 Nov 2024, 12:53 | 0.17 | 0.17 mg/l |
| 21 Oct 2024, 13:52 | 0.18 | 0.18 mg/l |
| 16 Sep 2024, 13:23 | 0.21 | 0.21 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
366 µS/cm
Sampled 28 Aug 2026, 34 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Aug 2026, 10:33 | 366 | 366 µS/cm |
| 31 Jul 2026, 08:12 | 564 | 564 µS/cm |
| 19 Jun 2026, 09:04 | 501 | 501 µS/cm |
| 29 May 2026, 07:54 | 428 | 428 µS/cm |
| 11 May 2026, 13:04 | 602 | 602 µS/cm |
| 13 Apr 2026, 14:35 | 549 | 549 µS/cm |
| 1 Apr 2026, 12:14 | 546 | 546 µS/cm |
| 25 Mar 2026, 14:03 | 499 | 499 µS/cm |
| 13 Mar 2026, 08:13 | 283 | 283 µS/cm |
| 26 Feb 2026, 13:32 | 437 | 437 µS/cm |
| 2 Feb 2026, 11:53 | 391 | 391 µS/cm |
| 28 Jan 2026, 08:47 | 346 | 346 µS/cm |
| 8 Jan 2026, 11:28 | 879 | 879 µS/cm |
| 18 Dec 2025, 13:18 | 349 | 349 µS/cm |
| 11 Dec 2025, 09:52 | 398 | 398 µS/cm |
| 19 Nov 2025, 12:45 | 535 | 535 µS/cm |
| 13 Nov 2025, 15:00 | 493 | 493 µS/cm |
| 14 Oct 2025, 14:05 | 549 | 549 µS/cm |
| 14 Oct 2025, 14:04 | 551 | 551 µS/cm |
| 29 Sep 2025, 10:01 | 522 | 522 µS/cm |
| 29 Aug 2025, 07:53 | 529 | 529 µS/cm |
| 30 Jul 2025, 14:28 | 471 | 471 µS/cm |
| 26 Jun 2025, 12:51 | 540 | 540 µS/cm |
| 9 May 2025, 15:13 | 617 | 617 µS/cm |
| 1 Apr 2025, 12:16 | 630 | 630 µS/cm |
| 11 Mar 2025, 13:27 | 566 | 566 µS/cm |
| 13 Feb 2025, 11:56 | 486 | 486 µS/cm |
| 8 Jan 2025, 14:02 | 379 | 379 µS/cm |
| 10 Dec 2024, 13:00 | 350 | 350 µS/cm |
| 11 Nov 2024, 12:53 | 570 | 570 µS/cm |
| 21 Oct 2024, 13:52 | 308 | 308 µS/cm |
| 16 Sep 2024, 13:23 | 514 | 514 µS/cm |
Everything measured here
61 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 61 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 32 | Sep 2024 – Aug 2026 | 70.5% 28 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 32 | Sep 2024 – Aug 2026 | 6.75 mg/l 28 Aug 2026 |
| Temperature of Water 0076 | River water | 32 | Sep 2024 – Aug 2026 | 17.3 °C 28 Aug 2026 |
| pH 0061 | River water | 32 | Sep 2024 – Aug 2026 | 7.3 28 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Sep 2024 – Aug 2026 | 0.14 mg/l 28 Aug 2026 |
| Nitrate as N 0117 | River water | 32 | Sep 2024 – Aug 2026 | 2.42 mg/l 28 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 32 | Sep 2024 – Aug 2026 | 0.19 mg/l 28 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 32 | Sep 2024 – Aug 2026 | 366 µS/cm 28 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Apr 2024 – Mar 2025 | below 0.004 µg/l 11 Mar 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Apr 2024 – Mar 2025 | below 0.005 µg/l 11 Mar 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 32 | Sep 2024 – Aug 2026 | 59 mg/l 28 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 32 | Sep 2024 – Aug 2026 | 0.00089 mg/l 28 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 31 | Sep 2024 – Aug 2026 | below 4 mg/l 28 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 5 | Apr 2026 – Aug 2026 | 9.6 mg/l 28 Aug 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Nitrite as N 0118 | River water | 32 | Sep 2024 – Aug 2026 | 0.084 mg/l 28 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 32 | Sep 2024 – Aug 2026 | 2.5 mg/l 28 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Apr 2024 – Mar 2025 | 0.0049 µg/l 11 Mar 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Apr 2024 – Mar 2025 | 0.003 µg/l 11 Mar 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Apr 2024 – Mar 2025 | 0.0025 µg/l 11 Mar 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Apr 2024 – Mar 2025 | 0.00092 µg/l 11 Mar 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Apr 2024 – Mar 2025 | below 0.005 µg/l 11 Mar 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Apr 2024 – Mar 2025 | 0.0011 µg/l 11 Mar 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Apr 2024 – Mar 2025 | 0.00053 µg/l 11 Mar 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Apr 2024 – Mar 2025 | 0.003 µg/l 11 Mar 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Apr 2024 – Mar 2025 | 0.0022 µg/l 11 Mar 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 µg/l 11 Mar 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Apr 2024 – Mar 2025 | below 0.001 µg/l 11 Mar 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Apr 2024 – Mar 2025 | 0.003 µg/l 11 Mar 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Apr 2024 – Mar 2025 | 0.0046 µg/l 11 Mar 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Apr 2024 – Mar 2025 | 0.0016 µg/l 11 Mar 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 11 Mar 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Apr 2024 – Mar 2025 | 0.0024 µg/l 11 Mar 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Apr 2024 – Mar 2025 | below 0.006 µg/l 11 Mar 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Apr 2024 – Mar 2025 | below 0.005 µg/l 11 Mar 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Apr 2024 – Mar 2025 | below 0.004 µg/l 11 Mar 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Apr 2024 – Mar 2025 | below 0.002 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.