Tykeswater above Colne
EA name: TYKESWATER ABOVE COLNE
Environment Agency sampling point TH-PCNR0086 · 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
- 4 Sep 2026, 09:2227 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 34 since 4 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 515600, 201500As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Tykeswater
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. 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)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.1%
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 90.1 | 90.1% |
| 5 Aug 2026, 14:05 | 94.6 | 94.6% |
| 8 Jul 2026, 11:27 | 123.9 | 123.9% |
| 18 May 2026, 10:33 | 93.3 | 93.3% |
| 20 Apr 2026, 09:16 | 92.4 | 92.4% |
| 5 Mar 2026, 09:19 | 98.7 | 98.7% |
| 2 Feb 2026, 13:48 | 99.4 | 99.4% |
| 6 Jan 2026, 11:15 | 95.6 | 95.6% |
| 2 Dec 2025, 10:51 | 93.6 | 93.6% |
| 3 Nov 2025, 13:43 | 92.1 | 92.1% |
| 14 Oct 2025, 14:07 | 98.9 | 98.9% |
| 4 Sep 2025, 09:28 | 92.2 | 92.2% |
| 12 Aug 2025, 10:29 | 104.6 | 104.6% |
| 3 Jul 2025, 13:18 | 113.8 | 113.8% |
| 5 Jun 2025, 12:33 | 104.6 | 104.6% |
| 9 May 2025, 09:00 | 98.6 | 98.6% |
| 10 Apr 2025, 12:08 | 147.8 | 147.8% |
| 4 Mar 2025, 09:31 | 104.7 | 104.7% |
| 5 Feb 2025, 08:46 | 97.5 | 97.5% |
| 6 Jan 2025, 09:41 | 97.8 | 97.8% |
| 4 Dec 2024, 12:56 | 100.1 | 100.1% |
| 8 Nov 2024, 10:18 | 89.4 | 89.4% |
| 1 Oct 2024, 13:59 | 96.3 | 96.3% |
| 3 Sep 2024, 10:19 | 88.2 | 88.2% |
| 6 Aug 2024, 11:29 | 96.3 | 96.3% |
| 11 Jul 2024, 11:14 | 99.6 | 99.6% |
| 5 Jun 2024, 09:28 | 98.6 | 98.6% |
| 1 Mar 2024, 11:37 | 96.1 | 96.1% |
| 7 Feb 2024, 10:28 | 95.7 | 95.7% |
| 3 Jan 2024, 11:38 | 97.2 | 97.2% |
| 12 Dec 2023, 10:55 | 95.5 | 95.5% |
| 1 Nov 2023, 11:08 | 94.3 | 94.3% |
| 4 Oct 2023, 14:46 | 101.5 | 101.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.44 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 8.44 | 8.44 mg/l |
| 5 Aug 2026, 14:05 | 8.79 | 8.79 mg/l |
| 8 Jul 2026, 11:27 | 11.1 | 11.1 mg/l |
| 18 May 2026, 10:33 | 9.96 | 9.96 mg/l |
| 20 Apr 2026, 09:16 | 10.5 | 10.5 mg/l |
| 5 Mar 2026, 09:19 | 11.7 | 11.7 mg/l |
| 2 Feb 2026, 13:48 | 11.8 | 11.8 mg/l |
| 6 Jan 2026, 11:15 | 13.2 | 13.2 mg/l |
| 2 Dec 2025, 10:51 | 10.9 | 10.9 mg/l |
| 3 Nov 2025, 13:43 | 9.97 | 9.97 mg/l |
| 14 Oct 2025, 14:07 | 10.5 | 10.5 mg/l |
| 4 Sep 2025, 09:28 | 9.12 | 9.12 mg/l |
| 12 Aug 2025, 10:29 | 9.82 | 9.82 mg/l |
| 3 Jul 2025, 13:18 | 10.5 | 10.5 mg/l |
| 5 Jun 2025, 12:33 | 10.8 | 10.8 mg/l |
| 9 May 2025, 09:00 | 11.1 | 11.1 mg/l |
| 10 Apr 2025, 12:08 | 16.3 | 16.3 mg/l |
| 4 Mar 2025, 09:31 | 13.4 | 13.4 mg/l |
| 5 Feb 2025, 08:46 | 12.5 | 12.5 mg/l |
| 6 Jan 2025, 09:41 | 11.7 | 11.7 mg/l |
| 4 Dec 2024, 12:56 | 12.1 | 12.1 mg/l |
| 8 Nov 2024, 10:18 | 9.98 | 9.98 mg/l |
| 1 Oct 2024, 13:59 | 10 | 10 mg/l |
| 3 Sep 2024, 10:19 | 8.4 | 8.4 mg/l |
| 6 Aug 2024, 11:29 | 9 | 9 mg/l |
| 11 Jul 2024, 11:14 | 9.68 | 9.68 mg/l |
| 5 Jun 2024, 09:28 | 10.3 | 10.3 mg/l |
| 1 Mar 2024, 11:37 | 11.7 | 11.7 mg/l |
| 7 Feb 2024, 10:28 | 11.5 | 11.5 mg/l |
| 3 Jan 2024, 11:38 | 11.3 | 11.3 mg/l |
| 12 Dec 2023, 10:55 | 11.1 | 11.1 mg/l |
| 1 Nov 2023, 11:08 | 10 | 10 mg/l |
| 4 Oct 2023, 14:46 | 10.2 | 10.2 mg/l |
Water temperature
code 0076 · °C
18.4 °C
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 18.4 | 18.4 °C |
| 5 Aug 2026, 14:05 | 18.8 | 18.8 °C |
| 8 Jul 2026, 11:27 | 20.6 | 20.6 °C |
| 18 May 2026, 10:33 | 12.3 | 12.3 °C |
| 20 Apr 2026, 09:16 | 9.7 | 9.7 °C |
| 5 Mar 2026, 09:19 | 7.8 | 7.8 °C |
| 2 Feb 2026, 13:48 | 7.8 | 7.8 °C |
| 6 Jan 2026, 11:15 | 2.1 | 2.1 °C |
| 2 Dec 2025, 10:51 | 8.8 | 8.8 °C |
| 3 Nov 2025, 13:43 | 11.7 | 11.7 °C |
| 14 Oct 2025, 14:07 | 12.5 | 12.5 °C |
| 4 Sep 2025, 09:28 | 15.8 | 15.8 °C |
| 12 Aug 2025, 10:29 | 18.3 | 18.3 °C |
| 3 Jul 2025, 13:18 | 19.1 | 19.1 °C |
| 5 Jun 2025, 12:33 | 13.9 | 13.9 °C |
| 9 May 2025, 09:00 | 10 | 10 °C |
| 10 Apr 2025, 12:08 | 10.9 | 10.9 °C |
| 4 Mar 2025, 09:31 | 5 | 5 °C |
| 5 Feb 2025, 08:46 | 4.7 | 4.7 °C |
| 6 Jan 2025, 09:41 | 7.7 | 7.7 °C |
| 4 Dec 2024, 12:56 | 7 | 7 °C |
| 8 Nov 2024, 10:18 | 10.4 | 10.4 °C |
| 1 Oct 2024, 13:59 | 13.4 | 13.4 °C |
| 3 Sep 2024, 10:19 | 17.6 | 17.6 °C |
| 6 Aug 2024, 11:29 | 18.5 | 18.5 °C |
| 11 Jul 2024, 11:14 | 16.6 | 16.6 °C |
| 5 Jun 2024, 09:28 | 13.2 | 13.2 °C |
| 1 Mar 2024, 11:37 | 6.8 | 6.8 °C |
| 7 Feb 2024, 10:28 | 7.5 | 7.5 °C |
| 3 Jan 2024, 11:38 | 8.6 | 8.6 °C |
| 12 Dec 2023, 10:55 | 8.7 | 8.7 °C |
| 1 Nov 2023, 11:08 | 12.5 | 12.5 °C |
| 4 Oct 2023, 14:46 | 15 | 15 °C |
pH
code 0061
8.08
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 8.08 | 8.08 |
| 5 Aug 2026, 14:05 | 8.21 | 8.21 |
| 8 Jul 2026, 11:27 | 8.45 | 8.45 |
| 18 May 2026, 10:33 | 8.37 | 8.37 |
| 20 Apr 2026, 09:16 | 8.13 | 8.13 |
| 5 Mar 2026, 09:19 | 8.38 | 8.38 |
| 2 Feb 2026, 13:48 | 8.19 | 8.19 |
| 6 Jan 2026, 11:15 | 8.21 | 8.21 |
| 2 Dec 2025, 10:51 | 8.14 | 8.14 |
| 3 Nov 2025, 13:43 | 8.06 | 8.06 |
| 14 Oct 2025, 14:07 | 8.43 | 8.43 |
| 4 Sep 2025, 09:28 | 7.92 | 7.92 |
| 12 Aug 2025, 10:29 | 8.34 | 8.34 |
| 3 Jul 2025, 13:18 | 8.47 | 8.47 |
| 5 Jun 2025, 12:33 | 8.31 | 8.31 |
| 9 May 2025, 09:00 | 8.35 | 8.35 |
| 10 Apr 2025, 12:08 | 8.78 | 8.78 |
| 4 Mar 2025, 09:31 | 8.28 | 8.28 |
| 5 Feb 2025, 08:46 | 8.28 | 8.28 |
| 6 Jan 2025, 09:41 | 7.92 | 7.92 |
| 4 Dec 2024, 12:56 | 8.3 | 8.3 |
| 8 Nov 2024, 10:18 | 8.24 | 8.24 |
| 1 Oct 2024, 13:59 | 8.08 | 8.08 |
| 3 Sep 2024, 10:19 | 8.23 | 8.23 |
| 6 Aug 2024, 11:29 | 8.21 | 8.21 |
| 11 Jul 2024, 11:14 | 8.25 | 8.25 |
| 5 Jun 2024, 09:28 | 8.23 | 8.23 |
| 1 Mar 2024, 11:37 | 7.94 | 7.94 |
| 7 Feb 2024, 10:28 | 7.9 | 7.9 |
| 3 Jan 2024, 11:38 | 8.01 | 8.01 |
| 12 Dec 2023, 10:55 | 7.98 | 7.98 |
| 1 Nov 2023, 11:08 | 8.1 | 8.1 |
| 4 Oct 2023, 14:46 | 8.33 | 8.33 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2026, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jun 2026, 12:32 | 0.072 | 0.072 mg/l |
| 18 May 2026, 10:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Apr 2026, 09:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 09:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 13:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 11:15 | 0.18 | 0.18 mg/l |
| 2 Dec 2025, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Nov 2025, 13:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 14:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2025, 09:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 10:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2025, 13:18 | 0.037 | 0.037 mg/l |
| 5 Jun 2025, 12:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 09:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Apr 2025, 12:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 09:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2025, 08:46 | 0.031 | 0.031 mg/l |
| 6 Jan 2025, 09:41 | 0.031 | 0.031 mg/l |
| 4 Dec 2024, 12:56 | 0.049 | 0.049 mg/l |
| 8 Nov 2024, 10:18 | 0.097 | 0.097 mg/l |
| 1 Oct 2024, 13:59 | 0.11 | 0.11 mg/l |
| 3 Sep 2024, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Aug 2024, 11:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jul 2024, 11:14 | 0.04 | 0.04 mg/l |
| 5 Jun 2024, 09:28 | 0.034 | 0.034 mg/l |
| 1 Mar 2024, 11:37 | 0.12 | 0.12 mg/l |
| 7 Feb 2024, 10:28 | 0.1 | 0.1 mg/l |
| 3 Jan 2024, 11:38 | 0.06 | 0.06 mg/l |
| 12 Dec 2023, 10:55 | 0.041 | 0.041 mg/l |
| 1 Nov 2023, 11:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2023, 14:46 | 0.061 | 0.061 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.39 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 3.39 | 3.39 mg/l |
| 5 Aug 2026, 14:05 | 5.27 | 5.27 mg/l |
| 8 Jul 2026, 11:27 | 4.88 | 4.88 mg/l |
| 15 Jun 2026, 12:32 | 2.44 | 2.44 mg/l |
| 18 May 2026, 10:33 | 6.09 | 6.09 mg/l |
| 20 Apr 2026, 09:16 | 5.79 | 5.79 mg/l |
| 5 Mar 2026, 09:19 | 1.59 | 1.59 mg/l |
| 2 Feb 2026, 13:48 | 1.79 | 1.79 mg/l |
| 6 Jan 2026, 11:15 | 2.68 | 2.68 mg/l |
| 2 Dec 2025, 10:51 | 4.97 | 4.97 mg/l |
| 3 Nov 2025, 13:43 | 2.98 | 2.98 mg/l |
| 14 Oct 2025, 14:07 | 4.37 | 4.37 mg/l |
| 4 Sep 2025, 09:28 | 1.99 | 1.99 mg/l |
| 12 Aug 2025, 10:29 | 3.59 | 3.59 mg/l |
| 3 Jul 2025, 13:18 | 3.19 | 3.19 mg/l |
| 5 Jun 2025, 12:33 | 2.98 | 2.98 mg/l |
| 9 May 2025, 09:00 | 2.69 | 2.69 mg/l |
| 10 Apr 2025, 12:08 | 1.09 | 1.09 mg/l |
| 4 Mar 2025, 09:31 | 1.69 | 1.69 mg/l |
| 5 Feb 2025, 08:46 | 1.98 | 1.98 mg/l |
| 6 Jan 2025, 09:41 | 1.89 | 1.89 mg/l |
| 8 Nov 2024, 10:18 | 3.76 | 3.76 mg/l |
| 1 Oct 2024, 13:59 | 1.83 | 1.83 mg/l |
| 3 Sep 2024, 10:19 | 3.29 | 3.29 mg/l |
| 6 Aug 2024, 11:29 | 2.1 | 2.1 mg/l |
| 11 Jul 2024, 11:14 | 6.55 | 6.55 mg/l |
| 5 Jun 2024, 09:28 | 3.15 | 3.15 mg/l |
| 1 Mar 2024, 11:37 | 1.08 | 1.08 mg/l |
| 7 Feb 2024, 10:28 | 2.28 | 2.28 mg/l |
| 3 Jan 2024, 11:38 | 1.59 | 1.59 mg/l |
| 12 Dec 2023, 10:55 | 1.49 | 1.49 mg/l |
| 1 Nov 2023, 11:08 | 2.88 | 2.88 mg/l |
| 4 Oct 2023, 14:46 | 1.28 | 1.28 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
1.3 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 1.3 | 1.3 mg/l |
| 5 Aug 2026, 14:05 | 0.055 | 0.055 mg/l |
| 8 Jul 2026, 11:27 | 1.5 | 1.5 mg/l |
| 15 Jun 2026, 12:32 | 0.35 | 0.35 mg/l |
| 18 May 2026, 10:33 | 0.043 | 0.043 mg/l |
| 20 Apr 2026, 09:16 | 0.038 | 0.038 mg/l |
| 5 Mar 2026, 09:19 | 0.31 | 0.31 mg/l |
| 2 Feb 2026, 13:48 | 0.16 | 0.16 mg/l |
| 6 Jan 2026, 11:15 | 0.92 | 0.92 mg/l |
| 2 Dec 2025, 10:51 | 0.34 | 0.34 mg/l |
| 3 Nov 2025, 13:43 | 0.55 | 0.55 mg/l |
| 14 Oct 2025, 14:07 | 1.4 | 1.4 mg/l |
| 4 Sep 2025, 09:28 | 0.5 | 0.5 mg/l |
| 12 Aug 2025, 10:29 | 0.7 | 0.7 mg/l |
| 3 Jul 2025, 13:18 | 1.7 | 1.7 mg/l |
| 5 Jun 2025, 12:33 | 2.2 | 2.2 mg/l |
| 9 May 2025, 09:00 | 1.1 | 1.1 mg/l |
| 10 Apr 2025, 12:08 | 0.61 | 0.61 mg/l |
| 4 Mar 2025, 09:31 | 0.42 | 0.42 mg/l |
| 5 Feb 2025, 08:46 | 0.74 | 0.74 mg/l |
| 6 Jan 2025, 09:41 | 0.19 | 0.19 mg/l |
| 4 Dec 2024, 12:56 | 0.35 | 0.35 mg/l |
| 8 Nov 2024, 10:18 | 1.3 | 1.3 mg/l |
| 1 Oct 2024, 13:59 | 0.5 | 0.5 mg/l |
| 3 Sep 2024, 10:19 | 1.2 | 1.2 mg/l |
| 6 Aug 2024, 11:29 | 0.88 | 0.88 mg/l |
| 11 Jul 2024, 11:14 | 0.32 | 0.32 mg/l |
| 5 Jun 2024, 09:28 | 1.1 | 1.1 mg/l |
| 1 Mar 2024, 11:37 | 0.12 | 0.12 mg/l |
| 3 Jan 2024, 11:38 | 0.13 | 0.13 mg/l |
| 12 Dec 2023, 10:55 | 0.12 | 0.12 mg/l |
| 1 Nov 2023, 11:08 | 0.25 | 0.25 mg/l |
| 4 Oct 2023, 14:46 | 1.4 | 1.4 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
2053 µS/cm
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 09:22 | 2053 | 2053 µS/cm |
| 5 Aug 2026, 14:05 | 731 | 731 µS/cm |
| 8 Jul 2026, 11:27 | 3074 | 3074 µS/cm |
| 18 May 2026, 10:33 | 709 | 709 µS/cm |
| 20 Apr 2026, 09:16 | 709 | 709 µS/cm |
| 5 Mar 2026, 09:19 | 1140 | 1140 µS/cm |
| 2 Feb 2026, 13:48 | 627 | 627 µS/cm |
| 6 Jan 2026, 11:15 | 1739 | 1739 µS/cm |
| 2 Dec 2025, 10:51 | 1312 | 1312 µS/cm |
| 3 Nov 2025, 13:43 | 1714 | 1714 µS/cm |
| 14 Oct 2025, 14:07 | 3212 | 3212 µS/cm |
| 4 Sep 2025, 09:28 | 1037 | 1037 µS/cm |
| 12 Aug 2025, 10:29 | 2467 | 2467 µS/cm |
| 3 Jul 2025, 13:18 | 2308 | 2308 µS/cm |
| 5 Jun 2025, 12:33 | 3154 | 3154 µS/cm |
| 9 May 2025, 09:00 | 2079 | 2079 µS/cm |
| 10 Apr 2025, 12:08 | 1738 | 1738 µS/cm |
| 4 Mar 2025, 09:31 | 1088 | 1088 µS/cm |
| 5 Feb 2025, 08:46 | 1341 | 1341 µS/cm |
| 6 Jan 2025, 09:41 | 363 | 363 µS/cm |
| 4 Dec 2024, 12:56 | 863 | 863 µS/cm |
| 8 Nov 2024, 10:18 | 2112 | 2112 µS/cm |
| 1 Oct 2024, 13:59 | 975 | 975 µS/cm |
| 3 Sep 2024, 10:19 | 2240 | 2240 µS/cm |
| 6 Aug 2024, 11:29 | 1582 | 1582 µS/cm |
| 11 Jul 2024, 11:14 | 402 | 402 µS/cm |
| 5 Jun 2024, 09:28 | 2432 | 2432 µS/cm |
| 1 Mar 2024, 11:37 | 441 | 441 µS/cm |
| 7 Feb 2024, 10:28 | 479 | 479 µS/cm |
| 3 Jan 2024, 11:38 | 511 | 511 µS/cm |
| 12 Dec 2023, 10:55 | 460 | 460 µS/cm |
| 1 Nov 2023, 11:08 | 631 | 631 µS/cm |
| 4 Oct 2023, 14:46 | 2141 | 2141 µS/cm |
Everything measured here
59 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 59 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Sep 2026 | 90.1% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Sep 2026 | 8.44 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Sep 2026 | 18.4 °C 4 Sep 2026 |
| pH 0061 | River water | 33 | Oct 2023 – Sep 2026 | 8.08 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – Sep 2026 | below 0.03 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Sep 2026 | 3.39 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – Sep 2026 | 1.3 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Sep 2026 | 2053 µS/cm 4 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Aug 2024 – Aug 2025 | below 0.004 µg/l 12 Aug 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 34 | Oct 2023 – Sep 2026 | 240 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 32 | Oct 2023 – Sep 2026 | below 0.00101 mg/l 4 Sep 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Aug 2024 – Aug 2025 | below 0.002 µg/l 12 Aug 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Aug 2024 – Aug 2025 | below 0.002 µg/l 12 Aug 2025 |
| Nitrite as N 0118 | River water | 34 | Oct 2023 – Sep 2026 | 0.013 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Sep 2026 | 3.4 mg/l 4 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Aug 2024 – Aug 2025 | 0.0041 µg/l 12 Aug 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Aug 2024 – Aug 2025 | 0.0054 µg/l 12 Aug 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Aug 2024 – Aug 2025 | 0.0013 µg/l 12 Aug 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Aug 2024 – Aug 2025 | below 0.005 µg/l 12 Aug 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Aug 2024 – Aug 2025 | below 0.002 µg/l 12 Aug 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Aug 2024 – Aug 2025 | 0.0021 µg/l 12 Aug 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Aug 2024 – Aug 2025 | 0.00065 µg/l 12 Aug 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Aug 2024 – Aug 2025 | 0.004 µg/l 12 Aug 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Aug 2024 – Aug 2025 | 0.0046 µg/l 12 Aug 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Aug 2024 – Aug 2025 | below 0.0005 µg/l 12 Aug 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Aug 2024 – Aug 2025 | below 0.002 µg/l 12 Aug 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Aug 2024 – Aug 2025 | 0.0044 µg/l 12 Aug 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Aug 2024 – Aug 2025 | 0.0059 µg/l 12 Aug 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Aug 2024 – Aug 2025 | 0.0039 µg/l 12 Aug 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Aug 2024 – Aug 2025 | 0.00071 µg/l 12 Aug 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Aug 2024 – Aug 2025 | 0.005 µg/l 12 Aug 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Aug 2024 – Aug 2025 | below 0.006 µg/l 12 Aug 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Aug 2024 – Aug 2025 | below 0.002 µg/l 12 Aug 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Aug 2024 – Aug 2025 | below 0.004 µg/l 12 Aug 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Aug 2024 – Aug 2025 | below 0.001 µg/l 12 Aug 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.