Thames upstream of Runnymede Channel Intake
EA name: THAMES U/S OF RUNNYMEDE CHANNEL INTAKE (also listed as “R. THAMES U/S OF THE RUNNYMEDE CHANNEL INTAKE”)
Environment Agency sampling point TH-PRTS0046 · 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
- 8 May 2026, 13:395 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
- 33 since 16 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 503689, 170356As published, to the nearest 1 m. Open in a map
- River, by its own name
- Thames
- River, by the map
- River ThamesPlaced on the river its name gives, 26 m from the line.
- Next gauge downstream
- Penton Hook On the River Thames · 2.7 km along the river
- Nearest gauge upstream
- Staines On the River Thames · 1.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Planned investigation (local monitoring) (5 samples)
Environmental monitoring statutory (EU directives) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100%
Sampled 8 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 100 | 100% |
| 21 Apr 2026, 10:46 | 108.6 | 108.6% |
| 6 Mar 2026, 12:29 | 100.4 | 100.4% |
| 11 Feb 2026, 10:44 | 93.7 | 93.7% |
| 22 Jan 2026, 11:53 | 99.6 | 99.6% |
| 12 Dec 2025, 11:23 | 99.8 | 99.8% |
| 7 Nov 2025, 09:18 | 91.4 | 91.4% |
| 21 Oct 2025, 11:02 | 92.7 | 92.7% |
| 24 Sep 2025, 11:02 | 93.3 | 93.3% |
| 21 Aug 2025, 12:30 | 90.9 | 90.9% |
| 30 Jul 2025, 11:52 | 96.6 | 96.6% |
| 18 Jun 2025, 11:05 | 99.2 | 99.2% |
| 30 May 2025, 08:40 | 107.7 | 107.7% |
| 7 May 2025, 09:44 | 107.8 | 107.8% |
| 11 Mar 2025, 13:00 | 105.2 | 105.2% |
| 20 Feb 2025, 12:55 | 101.8 | 101.8% |
| 30 Jan 2025, 10:17 | 97.9 | 97.9% |
| 13 Dec 2024, 13:00 | 99.2 | 99.2% |
| 27 Nov 2024, 12:57 | 93.8 | 93.8% |
| 23 Oct 2024, 10:53 | 100.2 | 100.2% |
| 19 Sep 2024, 09:42 | 85.9 | 85.9% |
| 19 Aug 2024, 15:33 | 101.7 | 101.7% |
| 15 Jul 2024, 11:37 | 97.8 | 97.8% |
| 17 Jun 2024, 12:30 | 105.8 | 105.8% |
| 13 Mar 2024, 11:31 | 98.5 | 98.5% |
| 14 Feb 2024, 08:53 | 85.2 | 85.2% |
| 22 Jan 2024, 11:37 | 84.7 | 84.7% |
| 11 Dec 2023, 11:43 | 95.7 | 95.7% |
| 15 Nov 2023, 11:35 | 95.5 | 95.5% |
| 16 Oct 2023, 13:12 | 97.1 | 97.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10 mg/l
Sampled 8 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 10 | 10 mg/l |
| 21 Apr 2026, 10:46 | 11.5 | 11.5 mg/l |
| 6 Mar 2026, 12:29 | 11.2 | 11.2 mg/l |
| 11 Feb 2026, 10:44 | 10.7 | 10.7 mg/l |
| 22 Jan 2026, 11:53 | 11.6 | 11.6 mg/l |
| 12 Dec 2025, 11:23 | 11.1 | 11.1 mg/l |
| 7 Nov 2025, 09:18 | 9.67 | 9.67 mg/l |
| 21 Oct 2025, 11:02 | 9.47 | 9.47 mg/l |
| 24 Sep 2025, 11:02 | 9.34 | 9.34 mg/l |
| 21 Aug 2025, 12:30 | 8.34 | 8.34 mg/l |
| 30 Jul 2025, 11:52 | 8.9 | 8.9 mg/l |
| 18 Jun 2025, 11:05 | 8.84 | 8.84 mg/l |
| 30 May 2025, 08:40 | 10.3 | 10.3 mg/l |
| 7 May 2025, 09:44 | 11.3 | 11.3 mg/l |
| 11 Mar 2025, 13:00 | 11.9 | 11.9 mg/l |
| 20 Feb 2025, 12:55 | 12.2 | 12.2 mg/l |
| 30 Jan 2025, 10:17 | 12.1 | 12.1 mg/l |
| 13 Dec 2024, 13:00 | 12 | 12 mg/l |
| 27 Nov 2024, 12:57 | 11 | 11 mg/l |
| 23 Oct 2024, 10:53 | 10.6 | 10.6 mg/l |
| 19 Sep 2024, 09:42 | 8.4 | 8.4 mg/l |
| 19 Aug 2024, 15:33 | 9.33 | 9.33 mg/l |
| 15 Jul 2024, 11:37 | 9.29 | 9.29 mg/l |
| 17 Jun 2024, 12:30 | 10.3 | 10.3 mg/l |
| 13 Mar 2024, 11:31 | 11.19 | 11.19 mg/l |
| 14 Feb 2024, 08:53 | 9.83 | 9.83 mg/l |
| 22 Jan 2024, 11:37 | 10.6 | 10.6 mg/l |
| 11 Dec 2023, 11:43 | 11.4 | 11.4 mg/l |
| 15 Nov 2023, 11:35 | 10.9 | 10.9 mg/l |
| 16 Oct 2023, 13:12 | 10.1 | 10.1 mg/l |
Water temperature
code 0076 · °C
15.1 °C
Sampled 8 May 2026, 5 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 15.1 | 15.1 °C |
| 21 Apr 2026, 10:46 | 12.8 | 12.8 °C |
| 6 Mar 2026, 12:29 | 10.3 | 10.3 °C |
| 11 Feb 2026, 10:44 | 9.4 | 9.4 °C |
| 22 Jan 2026, 11:53 | 8.6 | 8.6 °C |
| 12 Dec 2025, 11:23 | 10.5 | 10.5 °C |
| 7 Nov 2025, 09:18 | 12.7 | 12.7 °C |
| 21 Oct 2025, 11:02 | 14.3 | 14.3 °C |
| 24 Sep 2025, 11:02 | 15.2 | 15.2 °C |
| 21 Aug 2025, 12:30 | 19.4 | 19.4 °C |
| 30 Jul 2025, 11:52 | 19.2 | 19.2 °C |
| 18 Jun 2025, 11:05 | 20.9 | 20.9 °C |
| 30 May 2025, 08:40 | 17.2 | 17.2 °C |
| 7 May 2025, 09:44 | 13.1 | 13.1 °C |
| 11 Mar 2025, 13:00 | 9.9 | 9.9 °C |
| 20 Feb 2025, 12:55 | 7.5 | 7.5 °C |
| 30 Jan 2025, 10:17 | 6.2 | 6.2 °C |
| 13 Dec 2024, 13:00 | 7 | 7 °C |
| 27 Nov 2024, 12:57 | 8.4 | 8.4 °C |
| 23 Oct 2024, 10:53 | 12.8 | 12.8 °C |
| 19 Sep 2024, 09:42 | 16.3 | 16.3 °C |
| 19 Aug 2024, 15:33 | 19.4 | 19.4 °C |
| 15 Jul 2024, 11:37 | 17.7 | 17.7 °C |
| 17 Jun 2024, 12:30 | 16.7 | 16.7 °C |
| 13 Mar 2024, 11:31 | 9.6 | 9.6 °C |
| 14 Feb 2024, 08:53 | 8.7 | 8.7 °C |
| 22 Jan 2024, 11:37 | 5.8 | 5.8 °C |
| 11 Dec 2023, 11:53 | 7.7 | 7.7 °C |
| 11 Dec 2023, 11:43 | 7.7 | 7.7 °C |
| 15 Nov 2023, 11:39 | 9.3 | 9.3 °C |
| 15 Nov 2023, 11:35 | 9.3 | 9.3 °C |
| 16 Oct 2023, 13:12 | 13.3 | 13.3 °C |
pH
code 0061
8.23
Sampled 8 May 2026, 5 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 8.23 | 8.23 |
| 21 Apr 2026, 10:46 | 8.35 | 8.35 |
| 6 Mar 2026, 12:29 | 8.18 | 8.18 |
| 11 Feb 2026, 10:44 | 8.18 | 8.18 |
| 22 Jan 2026, 11:53 | 8.34 | 8.34 |
| 12 Dec 2025, 11:23 | 8.08 | 8.08 |
| 7 Nov 2025, 09:18 | 8.01 | 8.01 |
| 21 Oct 2025, 11:02 | 7.88 | 7.88 |
| 24 Sep 2025, 11:02 | 8.03 | 8.03 |
| 21 Aug 2025, 12:30 | 8.01 | 8.01 |
| 30 Jul 2025, 11:52 | 8.14 | 8.14 |
| 18 Jun 2025, 11:05 | 8.19 | 8.19 |
| 30 May 2025, 08:40 | 8.32 | 8.32 |
| 7 May 2025, 09:44 | 8.51 | 8.51 |
| 11 Mar 2025, 13:00 | 8.25 | 8.25 |
| 20 Feb 2025, 12:55 | 8.25 | 8.25 |
| 30 Jan 2025, 10:17 | 8.07 | 8.07 |
| 13 Dec 2024, 13:00 | 8.11 | 8.11 |
| 27 Nov 2024, 12:57 | 7.92 | 7.92 |
| 23 Oct 2024, 10:53 | 8.03 | 8.03 |
| 19 Sep 2024, 09:42 | 8.03 | 8.03 |
| 19 Aug 2024, 15:33 | 8.21 | 8.21 |
| 15 Jul 2024, 11:37 | 8.17 | 8.17 |
| 17 Jun 2024, 12:30 | 8.2 | 8.2 |
| 13 Mar 2024, 11:31 | 8.05 | 8.05 |
| 14 Feb 2024, 08:53 | 8.05 | 8.05 |
| 22 Jan 2024, 11:37 | 8.15 | 8.15 |
| 11 Dec 2023, 11:53 | 8.06 | 8.06 |
| 11 Dec 2023, 11:43 | 8.06 | 8.06 |
| 15 Nov 2023, 11:39 | 7.93 | 7.93 |
| 15 Nov 2023, 11:35 | 7.94 | 7.94 |
| 16 Oct 2023, 13:12 | 8.16 | 8.16 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.039 mg/l
Sampled 8 May 2026, 5 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 0.039 | 0.039 mg/l |
| 21 Apr 2026, 10:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2026, 12:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Feb 2026, 10:44 | 0.069 | 0.069 mg/l |
| 22 Jan 2026, 11:53 | 0.046 | 0.046 mg/l |
| 12 Dec 2025, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2025, 09:18 | 0.05 | 0.05 mg/l |
| 21 Oct 2025, 11:02 | 0.068 | 0.068 mg/l |
| 24 Sep 2025, 11:02 | 0.056 | 0.056 mg/l |
| 21 Aug 2025, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jul 2025, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2025, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2025, 08:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 May 2025, 09:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2025, 13:00 | 0.032 | 0.032 mg/l |
| 20 Feb 2025, 12:55 | 0.042 | 0.042 mg/l |
| 30 Jan 2025, 10:17 | 0.072 | 0.072 mg/l |
| 13 Dec 2024, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Nov 2024, 12:57 | 0.069 | 0.069 mg/l |
| 23 Oct 2024, 10:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Sep 2024, 09:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 15:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 11:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2024, 11:31 | 0.13 | 0.13 mg/l |
| 14 Feb 2024, 08:53 | 0.047 | 0.047 mg/l |
| 22 Jan 2024, 11:37 | 0.1 | 0.1 mg/l |
| 11 Dec 2023, 11:53 | 0.069 | 0.069 mg/l |
| 11 Dec 2023, 11:43 | 0.061 | 0.061 mg/l |
| 15 Nov 2023, 11:39 | 0.071 | 0.071 mg/l |
| 15 Nov 2023, 11:35 | 0.07 | 0.07 mg/l |
| 16 Oct 2023, 13:12 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.98 mg/l
Sampled 8 May 2026, 5 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 7.98 | 7.98 mg/l |
| 21 Apr 2026, 10:46 | 7.88 | 7.88 mg/l |
| 6 Mar 2026, 12:29 | 5.99 | 5.99 mg/l |
| 11 Feb 2026, 10:44 | 4.48 | 4.48 mg/l |
| 22 Jan 2026, 11:53 | 5.98 | 5.98 mg/l |
| 12 Dec 2025, 11:23 | 7.09 | 7.09 mg/l |
| 7 Nov 2025, 09:18 | 9.87 | 9.87 mg/l |
| 21 Oct 2025, 11:02 | 9.56 | 9.56 mg/l |
| 24 Sep 2025, 11:02 | 9.17 | 9.17 mg/l |
| 21 Aug 2025, 12:30 | 8.68 | 8.68 mg/l |
| 30 Jul 2025, 11:52 | 8.88 | 8.88 mg/l |
| 18 Jun 2025, 11:05 | 8.09 | 8.09 mg/l |
| 30 May 2025, 08:40 | 7.58 | 7.58 mg/l |
| 7 May 2025, 09:44 | 7.88 | 7.88 mg/l |
| 11 Mar 2025, 13:00 | 6.87 | 6.87 mg/l |
| 20 Feb 2025, 12:55 | 7.27 | 7.27 mg/l |
| 30 Jan 2025, 10:17 | 4.36 | 4.36 mg/l |
| 13 Dec 2024, 13:00 | 5.48 | 5.48 mg/l |
| 27 Nov 2024, 12:57 | 3.87 | 3.87 mg/l |
| 23 Oct 2024, 10:53 | 4.49 | 4.49 mg/l |
| 19 Sep 2024, 09:42 | 8.09 | 8.09 mg/l |
| 19 Aug 2024, 15:33 | 7.89 | 7.89 mg/l |
| 15 Jul 2024, 11:37 | 6.49 | 6.49 mg/l |
| 17 Jun 2024, 12:30 | 6.89 | 6.89 mg/l |
| 13 Mar 2024, 11:31 | 5.74 | 5.74 mg/l |
| 14 Feb 2024, 08:53 | 4.37 | 4.37 mg/l |
| 11 Dec 2023, 11:53 | 4.86 | 4.86 mg/l |
| 15 Nov 2023, 11:39 | 4.67 | 4.67 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.14 mg/l
Sampled 8 May 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 0.14 | 0.14 mg/l |
| 21 Apr 2026, 10:46 | 0.077 | 0.077 mg/l |
| 6 Mar 2026, 12:29 | 0.081 | 0.081 mg/l |
| 11 Feb 2026, 10:44 | 0.096 | 0.096 mg/l |
| 22 Jan 2026, 11:53 | 0.12 | 0.12 mg/l |
| 12 Dec 2025, 11:23 | 0.15 | 0.15 mg/l |
| 7 Nov 2025, 09:18 | 0.26 | 0.26 mg/l |
| 21 Oct 2025, 11:02 | 0.24 | 0.24 mg/l |
| 24 Sep 2025, 11:02 | 0.27 | 0.27 mg/l |
| 21 Aug 2025, 12:30 | 0.19 | 0.19 mg/l |
| 30 Jul 2025, 11:52 | 0.21 | 0.21 mg/l |
| 18 Jun 2025, 11:05 | 0.18 | 0.18 mg/l |
| 30 May 2025, 08:40 | 0.096 | 0.096 mg/l |
| 7 May 2025, 09:44 | 0.098 | 0.098 mg/l |
| 11 Mar 2025, 13:00 | 0.097 | 0.097 mg/l |
| 20 Feb 2025, 12:55 | 0.092 | 0.092 mg/l |
| 30 Jan 2025, 10:17 | 0.13 | 0.13 mg/l |
| 13 Dec 2024, 13:00 | 0.15 | 0.15 mg/l |
| 27 Nov 2024, 12:57 | 0.21 | 0.21 mg/l |
| 23 Oct 2024, 10:53 | 0.12 | 0.12 mg/l |
| 19 Sep 2024, 09:42 | 0.21 | 0.21 mg/l |
| 19 Aug 2024, 15:33 | 0.18 | 0.18 mg/l |
| 15 Jul 2024, 11:37 | 0.18 | 0.18 mg/l |
| 17 Jun 2024, 12:30 | 0.14 | 0.14 mg/l |
| 13 Mar 2024, 11:31 | 0.11 | 0.11 mg/l |
| 14 Feb 2024, 08:53 | 0.12 | 0.12 mg/l |
Turbidity
code 6396 · NTU
6.5 NTU
Sampled 22 Jan 2024, 2.7 years ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 Jan 2024, 11:37 | 6.5 | 6.5 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
700 µS/cm
Sampled 8 May 2026, 5 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 13:39 | 700 | 700 µS/cm |
| 21 Apr 2026, 10:46 | 679 | 679 µS/cm |
| 6 Mar 2026, 12:29 | 617 | 617 µS/cm |
| 11 Feb 2026, 10:44 | 559 | 559 µS/cm |
| 22 Jan 2026, 11:53 | 608 | 608 µS/cm |
| 12 Dec 2025, 11:23 | 613 | 613 µS/cm |
| 7 Nov 2025, 09:18 | 782 | 782 µS/cm |
| 21 Oct 2025, 11:02 | 711 | 711 µS/cm |
| 24 Sep 2025, 11:02 | 757 | 757 µS/cm |
| 21 Aug 2025, 12:30 | 773 | 773 µS/cm |
| 30 Jul 2025, 11:52 | 746 | 746 µS/cm |
| 18 Jun 2025, 11:05 | 718 | 718 µS/cm |
| 30 May 2025, 08:40 | 695 | 695 µS/cm |
| 7 May 2025, 09:44 | 686 | 686 µS/cm |
| 11 Mar 2025, 13:00 | 671 | 671 µS/cm |
| 20 Feb 2025, 12:55 | 680 | 680 µS/cm |
| 30 Jan 2025, 10:17 | 516 | 516 µS/cm |
| 13 Dec 2024, 13:00 | 595 | 595 µS/cm |
| 27 Nov 2024, 12:57 | 450 | 450 µS/cm |
| 23 Oct 2024, 10:53 | 594 | 594 µS/cm |
| 19 Sep 2024, 09:42 | 719 | 719 µS/cm |
| 19 Aug 2024, 15:33 | 710 | 710 µS/cm |
| 15 Jul 2024, 11:37 | 676 | 676 µS/cm |
| 17 Jun 2024, 12:30 | 678 | 678 µS/cm |
| 13 Mar 2024, 11:31 | 620 | 620 µS/cm |
| 14 Feb 2024, 08:53 | 530 | 530 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
460 per 100 ml
Sampled 14 Feb 2024, 2.6 years ago · 5 results banked
Every result (5)
| Sampled | Result as published | Reads as |
|---|---|---|
| 14 Feb 2024, 08:53 | 460 | 460 per 100 ml |
| 22 Jan 2024, 11:37 | 3400 | 3400 per 100 ml |
| 11 Dec 2023, 11:43 | 3800 | 3800 per 100 ml |
| 15 Nov 2023, 11:35 | 9300 | 9300 per 100 ml |
| 16 Oct 2023, 13:12 | 520 | 520 per 100 ml |
Everything measured here
98 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 98 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – May 2026 | 100% 8 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – May 2026 | 10 mg/l 8 May 2026 |
| Temperature of Water 0076 | River water | 32 | Oct 2023 – May 2026 | 15.1 °C 8 May 2026 |
| pH 0061 | River water | 32 | Oct 2023 – May 2026 | 8.23 8 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – May 2026 | 0.039 mg/l 8 May 2026 |
| Nitrate as N 0117 | River water | 28 | Nov 2023 – May 2026 | 7.98 mg/l 8 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Feb 2024 – May 2026 | 0.14 mg/l 8 May 2026 |
| Turbidity 6396 | River water | 1 | Jan 2024 – Jan 2024 | 6.5 NTU 22 Jan 2024 |
| Conductivity at 25 C 0077 | River water | 26 | Feb 2024 – May 2026 | 700 µS/cm 8 May 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 5 | Oct 2023 – Feb 2024 | 460 per 100 ml 14 Feb 2024 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Jan 2025 | below 0.004 µg/l 30 Jan 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Jan 2025 | below 0.005 µg/l 30 Jan 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Acrylamide 5104 | River water | 2 | Feb 2024 – Mar 2024 | below 0.2 µg/l 13 Mar 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Feb 2024 – May 2026 | 230 mg/l 8 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 32 | Oct 2023 – May 2026 | 0.00103 mg/l 8 May 2026 |
| Ammoniacal Nitrogen, Filtered as N 9993 | River water | 2 | Feb 2024 – Mar 2024 | 0.14 mg/l 13 Mar 2024 |
| BOD : 5 Day ATU 0085 | River water | 24 | Feb 2024 – May 2026 | 1.5 mg/l 8 May 2026 |
| Bromate 7016 | River water | 2 | Feb 2024 – Mar 2024 | below 0.002 mg/l 13 Mar 2024 |
| Bromodichloromethane 3282 | River water | 2 | Feb 2024 – Mar 2024 | below 0.1 µg/l 13 Mar 2024 |
| Bromoform :- {Tribromomethane} 3283 | River water | 2 | Feb 2024 – Mar 2024 | below 0.1 µg/l 13 Mar 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Feb 2024 – Mar 2024 | 4.5 mg/l 13 Mar 2024 |
| Carbon, Organic, Total as C :- {TOC} 0099 | River water | 1 | Feb 2024 – Feb 2024 | 7.38 mg/l 14 Feb 2024 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 2 | Feb 2024 – Mar 2024 | 18 mg/l 13 Mar 2024 |
| Chlormequat 9952 | River water | 1 | Feb 2024 – Feb 2024 | below 0.2 µg/l 14 Feb 2024 |
| Chlorodibromomethane 3292 | River water | 2 | Feb 2024 – Mar 2024 | below 0.1 µg/l 13 Mar 2024 |
| Chloroform :- {Trichloromethane} 3373 | River water | 2 | Feb 2024 – Mar 2024 | below 0.1 µg/l 13 Mar 2024 |
| Chlorophyll : Acetone Extract 7887 | River water | 1 | Feb 2024 – Feb 2024 | 4.2 µg/l 14 Feb 2024 |
| Chlorotoluron 9348 | River water | 2 | Oct 2023 – Feb 2024 | below 0.01 µg/l 14 Feb 2024 |
| Clostridium perfringens : Confirmed : MF 2325 | River water | 5 | Oct 2023 – Feb 2024 | 250 per 100 ml 14 Feb 2024 |
| Clostridium perfringens : Presumptive : MF 3346 | River water | 5 | Oct 2023 – Feb 2024 | 310 colony forming units / 100ml 14 Feb 2024 |
| Colony count : 1 Day at 37C : Aerobic 0933 | River water | 4 | Oct 2023 – Jan 2024 | 770 number per millilitre 22 Jan 2024 |
| Colony count : 2 Days at 37C : Aerobic 0934 | River water | 4 | Oct 2023 – Jan 2024 | 1700 number per millilitre 22 Jan 2024 |
| Colony count : 3 Days at 22C : Aerobic 0932 | River water | 4 | Oct 2023 – Jan 2024 | 11000 number per millilitre 22 Jan 2024 |
| Colony count : 3 Days at 37C : Aerobic 7445 | River water | 4 | Oct 2023 – Jan 2024 | 2000 number per millilitre 22 Jan 2024 |
| Colony count : 5 Days at 22C : Aerobic 4337 | River water | 4 | Oct 2023 – Jan 2024 | 14000 number per millilitre 22 Jan 2024 |
| Colony count : 7 Days at 22C : Aerobic 0109 | River water | 4 | Oct 2023 – Jan 2024 | 17000 number per millilitre 22 Jan 2024 |
| Conductivity at 20 C 0062 | River water | 2 | Feb 2024 – Mar 2024 | 560 µS/cm 13 Mar 2024 |
| Copper 6452 | River water | 1 | Mar 2024 – Mar 2024 | 3 µg/l 13 Mar 2024 |
| Diethyl Phthalate 7567 | River water | 1 | Feb 2024 – Feb 2024 | below 1 µg/l 14 Feb 2024 |
| Enterococci: Intestinal: Confirmed: MF 3723 | River water | 4 | Oct 2023 – Jan 2024 | 1500 colony forming units / 100ml 22 Jan 2024 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 5 | Oct 2023 – Feb 2024 | 270 colony forming units / 100ml 14 Feb 2024 |
| Fluoride 0177 | River water | 1 | Jan 2024 – Jan 2024 | 0.13 mg/l 22 Jan 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| Manganese 6050 | River water | 1 | Mar 2024 – Mar 2024 | 19 µg/l 13 Mar 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Nitrite as N 0118 | River water | 28 | Nov 2023 – May 2026 | 0.025 mg/l 8 May 2026 |
| Nitrogen, Dissolved Inorganic : as N 4925 | River water | 2 | Feb 2024 – Mar 2024 | 5.74 mg/l 13 Mar 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Nov 2023 – May 2026 | 8 mg/l 8 May 2026 |
| Nitrogen, Total Oxidised, Filtered as N 9943 | River water | 2 | Feb 2024 – Mar 2024 | 5.6 mg/l 13 Mar 2024 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Jan 2025 | 0.0023 µg/l 30 Jan 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Jan 2025 | below 0.003 µg/l 30 Jan 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Jan 2025 | below 0.005 µg/l 30 Jan 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Jan 2025 | 0.0012 µg/l 30 Jan 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Jan 2025 | 0.002 µg/l 30 Jan 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Jan 2025 | 0.0023 µg/l 30 Jan 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Jan 2025 | below 0.001 µg/l 30 Jan 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Jan 2025 | 0.0017 µg/l 30 Jan 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Jan 2025 | 0.002 µg/l 30 Jan 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Jan 2025 | 0.0022 µg/l 30 Jan 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Jan 2025 | below 0.0005 µg/l 30 Jan 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Jan 2025 | below 0.006 µg/l 30 Jan 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Jan 2025 | below 0.005 µg/l 30 Jan 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Jan 2025 | below 0.004 µg/l 30 Jan 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Jan 2025 | below 0.002 µg/l 30 Jan 2025 |
| Salinity : In Situ 7608 | River water | 6 | Oct 2023 – Mar 2024 | 0.3 parts per thousand 13 Mar 2024 |
| Solids, Suspended at 105 C 0135 | River water | 2 | Feb 2024 – Mar 2024 | 16 mg/l 13 Mar 2024 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | River water | 3 | Jan 2024 – Mar 2024 | below 0.1 µg/l 13 Mar 2024 |
| Trichloroethylene :- {Trichloroethene} 3334 | River water | 1 | Feb 2024 – Feb 2024 | below 0.1 µg/l 14 Feb 2024 |
| Trihalomethanes : Total :- {THM} 1200 | River water | 2 | Feb 2024 – Mar 2024 | below 0.4 µg/l 13 Mar 2024 |
| Zinc 6455 | River water | 1 | Mar 2024 – Mar 2024 | 7.1 µg/l 13 Mar 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.