Caker Stream above Alton sewage treatment works
EA name: CAKER STREAM ABOVE ALTON STW
Environment Agency sampling point TH-PWER0089 · 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
- 10 Sep 2026, 14:3621 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 36 since 2 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 472890, 139610As published, to the nearest 10 m. Open in a map
- River, by its own name
- Caker Stream
- River, by the map
- Caker StreamPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Farnham On the River Wey · 17 km along the river
- Nearest gauge upstream
- Caker Stream On the Caker Stream · 1.4 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (34 samples)
Monitoring (national agency policy) (2 samples)
3 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
80.9%
Sampled 10 Sep 2026, 21 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 80.9 | 80.9% |
| 16 Jun 2026, 10:06 | 73.7 | 73.7% |
| 7 May 2026, 11:21 | 87.3 | 87.3% |
| 10 Apr 2026, 15:25 | 129 | 129% |
| 16 Mar 2026, 17:03 | 113.4 | 113.4% |
| 2 Feb 2026, 12:20 | 98.7 | 98.7% |
| 7 Jan 2026, 12:23 | 88.7 | 88.7% |
| 4 Dec 2025, 14:58 | 93.6 | 93.6% |
| 12 Nov 2025, 16:06 | 83.7 | 83.7% |
| 18 Sep 2025, 16:22 | 85.8 | 85.8% |
| 27 Aug 2025, 14:50 | 79.3 | 79.3% |
| 14 Jul 2025, 17:14 | 89.7 | 89.7% |
| 24 Jun 2025, 16:52 | 85.2 | 85.2% |
| 6 May 2025, 13:32 | 98.9 | 98.9% |
| 11 Apr 2025, 15:10 | 131.9 | 131.9% |
| 3 Mar 2025, 15:58 | 101 | 101% |
| 13 Feb 2025, 17:19 | 92.4 | 92.4% |
| 24 Jan 2025, 11:32 | 93.2 | 93.2% |
| 10 Dec 2024, 15:16 | 91.6 | 91.6% |
| 29 Nov 2024, 13:18 | 95.6 | 95.6% |
| 25 Oct 2024, 10:31 | 83.3 | 83.3% |
| 20 Sep 2024, 11:38 | 78.1 | 78.1% |
| 22 Aug 2024, 13:18 | 80.1 | 80.1% |
| 30 Jul 2024, 12:18 | 85.7 | 85.7% |
| 24 Jun 2024, 14:28 | 96.5 | 96.5% |
| 23 May 2024, 16:00 | 109 | 109% |
| 9 Apr 2024, 12:10 | 115.7 | 115.7% |
| 11 Mar 2024, 15:03 | 102.4 | 102.4% |
| 6 Feb 2024, 11:19 | 100.1 | 100.1% |
| 22 Jan 2024, 15:13 | 95.4 | 95.4% |
| 1 Dec 2023, 12:53 | 94.3 | 94.3% |
| 1 Nov 2023, 12:11 | 88.8 | 88.8% |
| 2 Oct 2023, 13:44 | 81.7 | 81.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.3 mg/l
Sampled 10 Sep 2026, 21 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 8.3 | 8.3 mg/l |
| 16 Jun 2026, 10:06 | 7.56 | 7.56 mg/l |
| 7 May 2026, 11:21 | 9.7 | 9.7 mg/l |
| 10 Apr 2026, 15:25 | 13.8 | 13.8 mg/l |
| 16 Mar 2026, 17:03 | 12.7 | 12.7 mg/l |
| 2 Feb 2026, 12:20 | 11.6 | 11.6 mg/l |
| 7 Jan 2026, 12:23 | 11.1 | 11.1 mg/l |
| 4 Dec 2025, 14:58 | 10.9 | 10.9 mg/l |
| 12 Nov 2025, 16:06 | 8.86 | 8.86 mg/l |
| 18 Sep 2025, 16:22 | 8.52 | 8.52 mg/l |
| 27 Aug 2025, 14:50 | 7.89 | 7.89 mg/l |
| 14 Jul 2025, 17:14 | 8.7 | 8.7 mg/l |
| 24 Jun 2025, 16:52 | 8.23 | 8.23 mg/l |
| 6 May 2025, 13:32 | 11 | 11 mg/l |
| 11 Apr 2025, 15:10 | 13.7 | 13.7 mg/l |
| 3 Mar 2025, 15:58 | 11.6 | 11.6 mg/l |
| 13 Feb 2025, 17:19 | 11.3 | 11.3 mg/l |
| 24 Jan 2025, 11:32 | 11.2 | 11.2 mg/l |
| 10 Dec 2024, 15:16 | 10.8 | 10.8 mg/l |
| 29 Nov 2024, 13:18 | 11.2 | 11.2 mg/l |
| 25 Oct 2024, 10:31 | 8.94 | 8.94 mg/l |
| 20 Sep 2024, 11:38 | 7.99 | 7.99 mg/l |
| 22 Aug 2024, 13:18 | 8.23 | 8.23 mg/l |
| 30 Jul 2024, 12:18 | 8.55 | 8.55 mg/l |
| 24 Jun 2024, 14:28 | 9.64 | 9.64 mg/l |
| 23 May 2024, 16:00 | 11.1 | 11.1 mg/l |
| 9 Apr 2024, 12:10 | 13 | 13 mg/l |
| 11 Mar 2024, 15:03 | 11.7 | 11.7 mg/l |
| 6 Feb 2024, 11:19 | 11.3 | 11.3 mg/l |
| 22 Jan 2024, 15:13 | 11.2 | 11.2 mg/l |
| 1 Dec 2023, 12:53 | 11.8 | 11.8 mg/l |
| 1 Nov 2023, 12:11 | 9.5 | 9.5 mg/l |
| 2 Oct 2023, 13:44 | 8.27 | 8.27 mg/l |
Water temperature
code 0076 · °C
14.1 °C
Sampled 10 Sep 2026, 21 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 14.1 | 14.1 °C |
| 16 Jun 2026, 10:06 | 14.1 | 14.1 °C |
| 7 May 2026, 11:21 | 10.6 | 10.6 °C |
| 10 Apr 2026, 15:25 | 12.3 | 12.3 °C |
| 16 Mar 2026, 17:03 | 10.4 | 10.4 °C |
| 2 Feb 2026, 12:20 | 8.2 | 8.2 °C |
| 7 Jan 2026, 12:23 | 5.7 | 5.7 °C |
| 4 Dec 2025, 14:58 | 8.6 | 8.6 °C |
| 12 Nov 2025, 16:06 | 12.7 | 12.7 °C |
| 18 Sep 2025, 16:22 | 15.6 | 15.6 °C |
| 27 Aug 2025, 14:50 | 15.5 | 15.5 °C |
| 14 Jul 2025, 17:14 | 16.7 | 16.7 °C |
| 24 Jun 2025, 16:52 | 16.9 | 16.9 °C |
| 6 May 2025, 13:32 | 10.4 | 10.4 °C |
| 11 Apr 2025, 15:10 | 13.4 | 13.4 °C |
| 3 Mar 2025, 15:58 | 9.1 | 9.1 °C |
| 13 Feb 2025, 17:19 | 6.8 | 6.8 °C |
| 24 Jan 2025, 11:32 | 7.4 | 7.4 °C |
| 10 Dec 2024, 15:16 | 8 | 8 °C |
| 29 Nov 2024, 13:18 | 8.5 | 8.5 °C |
| 25 Oct 2024, 10:31 | 12.1 | 12.1 °C |
| 20 Sep 2024, 11:38 | 14.2 | 14.2 °C |
| 22 Aug 2024, 13:18 | 14 | 14 °C |
| 30 Jul 2024, 12:18 | 15.4 | 15.4 °C |
| 24 Jun 2024, 14:28 | 15.3 | 15.3 °C |
| 23 May 2024, 16:00 | 14.5 | 14.5 °C |
| 9 Apr 2024, 12:10 | 10 | 10 °C |
| 11 Mar 2024, 15:03 | 9.4 | 9.4 °C |
| 6 Feb 2024, 11:19 | 10.1 | 10.1 °C |
| 22 Jan 2024, 15:13 | 8.2 | 8.2 °C |
| 1 Dec 2023, 12:53 | 5.6 | 5.6 °C |
| 1 Nov 2023, 12:11 | 12.2 | 12.2 °C |
| 2 Oct 2023, 13:44 | 14.7 | 14.7 °C |
pH
code 0061
7.56
Sampled 10 Sep 2026, 21 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 7.56 | 7.56 |
| 16 Jun 2026, 10:06 | 7.58 | 7.58 |
| 7 May 2026, 11:21 | 7.66 | 7.66 |
| 10 Apr 2026, 15:25 | 8.27 | 8.27 |
| 16 Mar 2026, 17:03 | 8.18 | 8.18 |
| 2 Feb 2026, 12:20 | 7.74 | 7.74 |
| 7 Jan 2026, 12:23 | 7.7 | 7.7 |
| 4 Dec 2025, 14:58 | 7.6 | 7.6 |
| 12 Nov 2025, 16:06 | 7.42 | 7.42 |
| 18 Sep 2025, 16:22 | 7.53 | 7.53 |
| 27 Aug 2025, 14:50 | 7.48 | 7.48 |
| 14 Jul 2025, 17:14 | 7.59 | 7.59 |
| 24 Jun 2025, 16:52 | 7.55 | 7.55 |
| 6 May 2025, 13:32 | 7.79 | 7.79 |
| 11 Apr 2025, 15:10 | 8.08 | 8.08 |
| 3 Mar 2025, 15:58 | 7.93 | 7.93 |
| 13 Feb 2025, 17:19 | 7.72 | 7.72 |
| 24 Jan 2025, 11:32 | 7.52 | 7.52 |
| 10 Dec 2024, 15:16 | 7.8 | 7.8 |
| 29 Nov 2024, 13:18 | 7.84 | 7.84 |
| 25 Oct 2024, 10:31 | 7.57 | 7.57 |
| 20 Sep 2024, 11:38 | 7.62 | 7.62 |
| 22 Aug 2024, 13:18 | 7.56 | 7.56 |
| 30 Jul 2024, 12:18 | 7.67 | 7.67 |
| 24 Jun 2024, 14:28 | 8.8 | 8.8 |
| 23 May 2024, 16:00 | 8.06 | 8.06 |
| 9 Apr 2024, 12:10 | 8.07 | 8.07 |
| 11 Mar 2024, 15:03 | 7.84 | 7.84 |
| 6 Feb 2024, 11:19 | 8.01 | 8.01 |
| 22 Jan 2024, 15:13 | 7.95 | 7.95 |
| 1 Dec 2023, 12:53 | 7.82 | 7.82 |
| 1 Nov 2023, 12:11 | 7.61 | 7.61 |
| 2 Oct 2023, 13:44 | 7.68 | 7.68 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.089 mg/l
Sampled 10 Sep 2026, 21 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 0.089 | 0.089 mg/l |
| 16 Jun 2026, 10:06 | 0.054 | 0.054 mg/l |
| 7 May 2026, 11:21 | 0.032 | 0.032 mg/l |
| 10 Apr 2026, 15:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Mar 2026, 17:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 12:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 12:23 | 0.077 | 0.077 mg/l |
| 4 Dec 2025, 14:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 16:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2025, 16:22 | 0.068 | 0.068 mg/l |
| 27 Aug 2025, 14:50 | 0.072 | 0.072 mg/l |
| 14 Jul 2025, 17:14 | 0.12 | 0.12 mg/l |
| 24 Jun 2025, 16:52 | 0.46 | 0.46 mg/l |
| 6 May 2025, 13:32 | 0.053 | 0.053 mg/l |
| 11 Apr 2025, 15:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 15:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2025, 17:19 | 0.066 | 0.066 mg/l |
| 24 Jan 2025, 11:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Dec 2024, 15:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Nov 2024, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Oct 2024, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Sep 2024, 11:38 | 0.056 | 0.056 mg/l |
| 22 Aug 2024, 13:18 | 0.051 | 0.051 mg/l |
| 24 Jun 2024, 14:28 | 0.044 | 0.044 mg/l |
| 11 Mar 2024, 15:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2024, 11:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2024, 15:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Dec 2023, 12:53 | 0.036 | 0.036 mg/l |
| 1 Nov 2023, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2023, 13:44 | 0.061 | 0.061 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.78 mg/l
Sampled 10 Sep 2026, 21 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 4.78 | 4.78 mg/l |
| 16 Jun 2026, 10:06 | 3.98 | 3.98 mg/l |
| 7 May 2026, 11:21 | 4.08 | 4.08 mg/l |
| 10 Apr 2026, 15:25 | 4.08 | 4.08 mg/l |
| 16 Mar 2026, 17:03 | 3.79 | 3.79 mg/l |
| 2 Feb 2026, 12:20 | 3.5 | 3.5 mg/l |
| 7 Jan 2026, 12:23 | 3.29 | 3.29 mg/l |
| 4 Dec 2025, 14:58 | 4.99 | 4.99 mg/l |
| 12 Nov 2025, 16:06 | 4.98 | 4.98 mg/l |
| 18 Sep 2025, 16:22 | 4.48 | 4.48 mg/l |
| 27 Aug 2025, 14:50 | 5.08 | 5.08 mg/l |
| 14 Jul 2025, 17:14 | 4.58 | 4.58 mg/l |
| 24 Jun 2025, 16:52 | 4.55 | 4.55 mg/l |
| 6 May 2025, 13:32 | 3.68 | 3.68 mg/l |
| 11 Apr 2025, 15:10 | 3.89 | 3.89 mg/l |
| 3 Mar 2025, 15:58 | 4.49 | 4.49 mg/l |
| 13 Feb 2025, 17:19 | 4.49 | 4.49 mg/l |
| 24 Jan 2025, 11:32 | 3.08 | 3.08 mg/l |
| 10 Dec 2024, 15:16 | 4.39 | 4.39 mg/l |
| 29 Nov 2024, 13:18 | 4.09 | 4.09 mg/l |
| 25 Oct 2024, 10:31 | 4.29 | 4.29 mg/l |
| 20 Sep 2024, 11:38 | 4.48 | 4.48 mg/l |
| 22 Aug 2024, 13:18 | 4.69 | 4.69 mg/l |
| 24 Jun 2024, 14:28 | 3.89 | 3.89 mg/l |
| 11 Mar 2024, 15:03 | 4.79 | 4.79 mg/l |
| 6 Feb 2024, 11:19 | 4.39 | 4.39 mg/l |
| 22 Jan 2024, 15:13 | 4.49 | 4.49 mg/l |
| 1 Dec 2023, 12:53 | 4.49 | 4.49 mg/l |
| 1 Nov 2023, 12:11 | 4.09 | 4.09 mg/l |
| 2 Oct 2023, 13:44 | 4.48 | 4.48 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.074 mg/l
Sampled 10 Sep 2026, 21 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 0.074 | 0.074 mg/l |
| 16 Jun 2026, 10:06 | 0.064 | 0.064 mg/l |
| 7 May 2026, 11:21 | 0.03 | 0.03 mg/l |
| 10 Apr 2026, 15:25 | 0.036 | 0.036 mg/l |
| 16 Mar 2026, 17:03 | 0.088 | 0.088 mg/l |
| 2 Feb 2026, 12:20 | 0.23 | 0.23 mg/l |
| 7 Jan 2026, 12:23 | 0.2 | 0.2 mg/l |
| 4 Dec 2025, 14:58 | 0.35 | 0.35 mg/l |
| 12 Nov 2025, 16:06 | 0.3 | 0.3 mg/l |
| 18 Sep 2025, 16:22 | 0.064 | 0.064 mg/l |
| 27 Aug 2025, 14:50 | 0.061 | 0.061 mg/l |
| 14 Jul 2025, 17:14 | 0.086 | 0.086 mg/l |
| 24 Jun 2025, 16:52 | 0.11 | 0.11 mg/l |
| 6 May 2025, 13:32 | 0.049 | 0.049 mg/l |
| 11 Apr 2025, 15:10 | 0.043 | 0.043 mg/l |
| 3 Mar 2025, 15:58 | 0.08 | 0.08 mg/l |
| 13 Feb 2025, 17:19 | 0.11 | 0.11 mg/l |
| 24 Jan 2025, 11:32 | 0.38 | 0.38 mg/l |
| 29 Nov 2024, 13:18 | 0.21 | 0.21 mg/l |
| 25 Oct 2024, 10:31 | 0.16 | 0.16 mg/l |
| 20 Sep 2024, 11:38 | 0.069 | 0.069 mg/l |
| 22 Aug 2024, 13:18 | 0.053 | 0.053 mg/l |
| 24 Jun 2024, 14:28 | 0.054 | 0.054 mg/l |
| 11 Mar 2024, 15:03 | 0.092 | 0.092 mg/l |
| 22 Jan 2024, 15:13 | 0.16 | 0.16 mg/l |
| 1 Dec 2023, 12:53 | 0.13 | 0.13 mg/l |
| 1 Nov 2023, 12:11 | 0.29 | 0.29 mg/l |
| 2 Oct 2023, 13:44 | 0.059 | 0.059 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
666 µS/cm
Sampled 10 Sep 2026, 21 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Sep 2026, 14:36 | 666 | 666 µS/cm |
| 16 Jun 2026, 10:06 | 523 | 523 µS/cm |
| 7 May 2026, 11:21 | 664 | 664 µS/cm |
| 10 Apr 2026, 15:25 | 636 | 636 µS/cm |
| 16 Mar 2026, 17:03 | 567 | 567 µS/cm |
| 2 Feb 2026, 12:20 | 397 | 397 µS/cm |
| 7 Jan 2026, 12:23 | 1065 | 1065 µS/cm |
| 4 Dec 2025, 14:58 | 388 | 388 µS/cm |
| 12 Nov 2025, 16:06 | 533 | 533 µS/cm |
| 18 Sep 2025, 16:22 | 652 | 652 µS/cm |
| 27 Aug 2025, 14:50 | 655 | 655 µS/cm |
| 14 Jul 2025, 17:14 | 664 | 664 µS/cm |
| 24 Jun 2025, 16:52 | 654 | 654 µS/cm |
| 6 May 2025, 13:32 | 622 | 622 µS/cm |
| 11 Apr 2025, 15:10 | 622 | 622 µS/cm |
| 3 Mar 2025, 15:58 | 578 | 578 µS/cm |
| 13 Feb 2025, 17:19 | 600 | 600 µS/cm |
| 24 Jan 2025, 11:32 | 325 | 325 µS/cm |
| 10 Dec 2024, 15:16 | 502 | 502 µS/cm |
| 29 Nov 2024, 13:18 | 473 | 473 µS/cm |
| 25 Oct 2024, 10:31 | 550 | 550 µS/cm |
| 20 Sep 2024, 11:38 | 690 | 690 µS/cm |
| 22 Aug 2024, 13:18 | 687 | 687 µS/cm |
| 30 Jul 2024, 12:18 | 695 | 695 µS/cm |
| 24 Jun 2024, 14:28 | 689 | 689 µS/cm |
| 11 Mar 2024, 15:03 | 606 | 606 µS/cm |
| 6 Feb 2024, 11:19 | 624 | 624 µS/cm |
| 22 Jan 2024, 15:13 | 534 | 534 µS/cm |
| 1 Dec 2023, 12:53 | 572 | 572 µS/cm |
| 1 Nov 2023, 12:11 | 334 | 334 µS/cm |
| 2 Oct 2023, 13:44 | 710 | 710 µS/cm |
Everything measured here
62 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 62 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Sep 2026 | 80.9% 10 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Sep 2026 | 8.3 mg/l 10 Sep 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Sep 2026 | 14.1 °C 10 Sep 2026 |
| pH 0061 | River water | 33 | Oct 2023 – Sep 2026 | 7.56 10 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Oct 2023 – Sep 2026 | 0.089 mg/l 10 Sep 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – Sep 2026 | 4.78 mg/l 10 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 28 | Oct 2023 – Sep 2026 | 0.074 mg/l 10 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Oct 2023 – Sep 2026 | 666 µS/cm 10 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Oct 2024 – Oct 2024 | below 0.004 µg/l 25 Oct 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Oct 2024 – Oct 2024 | below 0.005 µg/l 25 Oct 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Oct 2024 – Oct 2024 | 0.0013 µg/l 25 Oct 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Sep 2026 | 260 mg/l 10 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – Sep 2026 | 0.00081 mg/l 10 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 26 | Oct 2023 – May 2026 | 1.2 mg/l 7 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| Nitrite as N 0118 | River water | 30 | Oct 2023 – Sep 2026 | 0.018 mg/l 10 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Oct 2023 – Sep 2026 | 4.8 mg/l 10 Sep 2026 |
| No flow /No sample 7668 | River water | 3 | Oct 2025 – Aug 2026 | No flow/discharge at sampling point 13 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Oct 2024 – Oct 2024 | below 0.005 µg/l 25 Oct 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Oct 2024 – Oct 2024 | 0.00052 µg/l 25 Oct 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Oct 2024 – Oct 2024 | 0.00064 µg/l 25 Oct 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Oct 2024 – Oct 2024 | below 0.0005 µg/l 25 Oct 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Oct 2024 – Oct 2024 | below 0.001 µg/l 25 Oct 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Oct 2024 – Oct 2024 | below 0.006 µg/l 25 Oct 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Oct 2024 – Oct 2024 | below 0.005 µg/l 25 Oct 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Oct 2024 – Oct 2024 | below 0.004 µg/l 25 Oct 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Oct 2024 – Oct 2024 | below 0.002 µg/l 25 Oct 2024 |
| Phosphorus, Total as P 0348 | River water | 23 | Jun 2024 – Sep 2026 | 0.081 mg/l 10 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.