Colne above G.U.C., Maple Lodge
EA name: COLNE ABOVE G.U.C., MAPLE LODGE
Environment Agency sampling point TH-PCNR0246 · 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
- 5 Aug 2026, 09:4657 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 33 since 13 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 504220, 192250As published, to the nearest 10 m. Open in a map
- River, by its own name
- Colne
- River, by the map
- River ColnePlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- Denham Colne On the River Colne · 7.1 km along the river (the path rests on a repair to the map)
- Why it was sampled
- Planned investigation (local monitoring) (32 samples)
Monitoring (national agency policy) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.1%
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 88.1 | 88.1% |
| 20 Jul 2026, 10:46 | 93.7 | 93.7% |
| 16 Jun 2026, 12:09 | 97 | 97% |
| 28 May 2026, 12:43 | 102.2 | 102.2% |
| 1 Apr 2026, 12:22 | 103 | 103% |
| 9 Mar 2026, 09:16 | 98 | 98% |
| 3 Feb 2026, 11:31 | 95.3 | 95.3% |
| 5 Jan 2026, 12:21 | 91.1 | 91.1% |
| 5 Dec 2025, 12:36 | 81.1 | 81.1% |
| 6 Nov 2025, 10:34 | 89.2 | 89.2% |
| 3 Oct 2025, 10:09 | 92.1 | 92.1% |
| 1 Sep 2025, 10:50 | 94.8 | 94.8% |
| 1 Aug 2025, 13:26 | 101.6 | 101.6% |
| 1 Jul 2025, 12:28 | 121.2 | 121.2% |
| 12 Jun 2025, 13:05 | 102.1 | 102.1% |
| 23 May 2025, 13:43 | 101.2 | 101.2% |
| 8 Apr 2025, 12:36 | 102.9 | 102.9% |
| 6 Mar 2025, 11:17 | 98.9 | 98.9% |
| 17 Feb 2025, 09:16 | 84.8 | 84.8% |
| 24 Jan 2025, 12:07 | 58.3 | 58.3% |
| 3 Dec 2024, 12:17 | 87.5 | 87.5% |
| 6 Nov 2024, 11:23 | 90.1 | 90.1% |
| 1 Oct 2024, 14:11 | 86.1 | 86.1% |
| 3 Sep 2024, 10:00 | 61.3 | 61.3% |
| 6 Aug 2024, 09:50 | 68.3 | 68.3% |
| 2 Jul 2024, 12:25 | 89.2 | 89.2% |
| 5 Jun 2024, 10:59 | 78.7 | 78.7% |
| 4 Mar 2024, 12:34 | 81.2 | 81.2% |
| 5 Feb 2024, 13:10 | 95.9 | 95.9% |
| 11 Jan 2024, 10:33 | 83.3 | 83.3% |
| 11 Dec 2023, 09:24 | 73.8 | 73.8% |
| 16 Nov 2023, 11:10 | 72.4 | 72.4% |
| 13 Oct 2023, 10:28 | 47.4 | 47.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.05 mg/l
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 8.05 | 8.05 mg/l |
| 20 Jul 2026, 10:46 | 8.81 | 8.81 mg/l |
| 16 Jun 2026, 12:09 | 9.2 | 9.2 mg/l |
| 28 May 2026, 12:43 | 9.09 | 9.09 mg/l |
| 1 Apr 2026, 12:22 | 11.4 | 11.4 mg/l |
| 9 Mar 2026, 09:16 | 11.1 | 11.1 mg/l |
| 3 Feb 2026, 11:31 | 11.4 | 11.4 mg/l |
| 5 Jan 2026, 12:21 | 12.6 | 12.6 mg/l |
| 5 Dec 2025, 12:36 | 10.1 | 10.1 mg/l |
| 6 Nov 2025, 10:34 | 9.46 | 9.46 mg/l |
| 3 Oct 2025, 10:09 | 9.59 | 9.59 mg/l |
| 1 Sep 2025, 10:50 | 9.23 | 9.23 mg/l |
| 1 Aug 2025, 13:26 | 9.59 | 9.59 mg/l |
| 1 Jul 2025, 12:28 | 10.2 | 10.2 mg/l |
| 12 Jun 2025, 13:05 | 9.8 | 9.8 mg/l |
| 23 May 2025, 13:43 | 10.4 | 10.4 mg/l |
| 8 Apr 2025, 12:36 | 11.3 | 11.3 mg/l |
| 6 Mar 2025, 11:17 | 11.8 | 11.8 mg/l |
| 17 Feb 2025, 09:16 | 11 | 11 mg/l |
| 24 Jan 2025, 12:07 | 6.51 | 6.51 mg/l |
| 3 Dec 2024, 12:17 | 10.2 | 10.2 mg/l |
| 6 Nov 2024, 11:23 | 9.85 | 9.85 mg/l |
| 1 Oct 2024, 14:11 | 9.01 | 9.01 mg/l |
| 3 Sep 2024, 10:00 | 5.84 | 5.84 mg/l |
| 6 Aug 2024, 09:50 | 6.42 | 6.42 mg/l |
| 2 Jul 2024, 12:25 | 8.76 | 8.76 mg/l |
| 5 Jun 2024, 10:59 | 8.04 | 8.04 mg/l |
| 4 Mar 2024, 12:34 | 9.24 | 9.24 mg/l |
| 5 Feb 2024, 13:10 | 10.9 | 10.9 mg/l |
| 11 Jan 2024, 10:33 | 10.8 | 10.8 mg/l |
| 11 Dec 2023, 09:24 | 8.84 | 8.84 mg/l |
| 16 Nov 2023, 11:10 | 8.52 | 8.52 mg/l |
| 13 Oct 2023, 10:28 | 4.74 | 4.74 mg/l |
Water temperature
code 0076 · °C
19.6 °C
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 19.6 | 19.6 °C |
| 20 Jul 2026, 10:46 | 18.2 | 18.2 °C |
| 16 Jun 2026, 12:09 | 17.8 | 17.8 °C |
| 28 May 2026, 12:43 | 21 | 21 °C |
| 1 Apr 2026, 12:22 | 10.7 | 10.7 °C |
| 9 Mar 2026, 09:16 | 9.9 | 9.9 °C |
| 3 Feb 2026, 11:31 | 7.7 | 7.7 °C |
| 5 Jan 2026, 12:21 | 1.8 | 1.8 °C |
| 5 Dec 2025, 12:36 | 6.1 | 6.1 °C |
| 6 Nov 2025, 10:34 | 12.6 | 12.6 °C |
| 3 Oct 2025, 10:09 | 13.4 | 13.4 °C |
| 1 Sep 2025, 10:50 | 16.5 | 16.5 °C |
| 1 Aug 2025, 13:26 | 18 | 18 °C |
| 1 Jul 2025, 12:28 | 24 | 24 °C |
| 12 Jun 2025, 13:05 | 17.2 | 17.2 °C |
| 23 May 2025, 13:43 | 14.2 | 14.2 °C |
| 8 Apr 2025, 12:36 | 11.1 | 11.1 °C |
| 6 Mar 2025, 11:17 | 7.7 | 7.7 °C |
| 17 Feb 2025, 09:16 | 4.4 | 4.4 °C |
| 24 Jan 2025, 12:07 | 10.4 | 10.4 °C |
| 3 Dec 2024, 12:17 | 8.6 | 8.6 °C |
| 6 Nov 2024, 11:23 | 11.3 | 11.3 °C |
| 1 Oct 2024, 14:11 | 13.2 | 13.2 °C |
| 3 Sep 2024, 10:00 | 17.6 | 17.6 °C |
| 6 Aug 2024, 09:50 | 18.2 | 18.2 °C |
| 2 Jul 2024, 12:25 | 16.1 | 16.1 °C |
| 5 Jun 2024, 10:59 | 14.3 | 14.3 °C |
| 4 Mar 2024, 12:34 | 9.6 | 9.6 °C |
| 5 Feb 2024, 13:10 | 9.6 | 9.6 °C |
| 11 Jan 2024, 10:33 | 4.4 | 4.4 °C |
| 11 Dec 2023, 09:24 | 7.5 | 7.5 °C |
| 16 Nov 2023, 11:10 | 8.2 | 8.2 °C |
| 13 Oct 2023, 10:28 | 15.3 | 15.3 °C |
pH
code 0061
7.96
Sampled 5 Aug 2026, 57 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 7.96 | 7.96 |
| 20 Jul 2026, 10:46 | 7.96 | 7.96 |
| 16 Jun 2026, 12:09 | 7.88 | 7.88 |
| 28 May 2026, 12:43 | 8.04 | 8.04 |
| 1 Apr 2026, 12:22 | 8.15 | 8.15 |
| 9 Mar 2026, 09:16 | 8.26 | 8.26 |
| 3 Feb 2026, 11:31 | 8.2 | 8.2 |
| 5 Jan 2026, 12:21 | 8 | 8 |
| 5 Dec 2025, 12:36 | 7.8 | 7.8 |
| 6 Nov 2025, 10:34 | 7.93 | 7.93 |
| 3 Oct 2025, 10:09 | 7.85 | 7.85 |
| 1 Sep 2025, 10:50 | 7.95 | 7.95 |
| 1 Aug 2025, 13:26 | 8.07 | 8.07 |
| 1 Jul 2025, 12:28 | 8.14 | 8.14 |
| 12 Jun 2025, 13:05 | 8 | 8 |
| 23 May 2025, 13:43 | 8.01 | 8.01 |
| 8 Apr 2025, 12:36 | 8.13 | 8.13 |
| 6 Mar 2025, 11:17 | 7.91 | 7.91 |
| 17 Feb 2025, 09:16 | 7.92 | 7.92 |
| 24 Jan 2025, 12:07 | 7.75 | 7.75 |
| 3 Dec 2024, 12:17 | 7.85 | 7.85 |
| 6 Nov 2024, 11:23 | 7.75 | 7.75 |
| 1 Oct 2024, 14:11 | 7.81 | 7.81 |
| 3 Sep 2024, 10:00 | 7.66 | 7.66 |
| 6 Aug 2024, 09:50 | 7.76 | 7.76 |
| 2 Jul 2024, 12:25 | 7.96 | 7.96 |
| 4 Mar 2024, 12:34 | 7.58 | 7.58 |
| 5 Feb 2024, 13:10 | 8.04 | 8.04 |
| 11 Jan 2024, 10:33 | 7.88 | 7.88 |
| 11 Dec 2023, 09:24 | 7.96 | 7.96 |
| 16 Nov 2023, 11:10 | 7.79 | 7.79 |
| 13 Oct 2023, 10:28 | 7.57 | 7.57 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 20 Jul 2026, 2 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Jul 2026, 10:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jun 2026, 12:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 May 2026, 12:43 | 0.03 | 0.03 mg/l |
| 1 Apr 2026, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Mar 2026, 09:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2026, 11:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jan 2026, 12:21 | 0.098 | 0.098 mg/l |
| 5 Dec 2025, 12:36 | 0.091 | 0.091 mg/l |
| 6 Nov 2025, 10:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2025, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Sep 2025, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2025, 13:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2025, 12:28 | 0.056 | 0.056 mg/l |
| 12 Jun 2025, 13:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 May 2025, 13:43 | 0.032 | 0.032 mg/l |
| 8 Apr 2025, 12:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2025, 11:17 | 0.053 | 0.053 mg/l |
| 17 Feb 2025, 09:16 | 0.07 | 0.07 mg/l |
| 24 Jan 2025, 12:07 | 16 | 16 mg/l |
| 3 Dec 2024, 12:17 | 0.062 | 0.062 mg/l |
| 6 Nov 2024, 11:23 | 0.04 | 0.04 mg/l |
| 1 Oct 2024, 14:11 | 0.068 | 0.068 mg/l |
| 3 Sep 2024, 10:00 | 0.14 | 0.14 mg/l |
| 6 Aug 2024, 09:50 | 0.16 | 0.16 mg/l |
| 2 Jul 2024, 12:25 | 0.13 | 0.13 mg/l |
| 5 Jun 2024, 10:59 | 0.19 | 0.19 mg/l |
| 4 Mar 2024, 12:34 | 6.8 | 6.8 mg/l |
| 5 Feb 2024, 13:10 | 0.057 | 0.057 mg/l |
| 11 Jan 2024, 10:33 | 0.074 | 0.074 mg/l |
| 11 Dec 2023, 09:24 | 0.39 | 0.39 mg/l |
| 16 Nov 2023, 11:10 | 0.13 | 0.13 mg/l |
| 13 Oct 2023, 10:28 | 0.8 | 0.8 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.29 mg/l
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 5.29 | 5.29 mg/l |
| 20 Jul 2026, 10:46 | 5.89 | 5.89 mg/l |
| 16 Jun 2026, 12:09 | 6.09 | 6.09 mg/l |
| 28 May 2026, 12:43 | 5.77 | 5.77 mg/l |
| 1 Apr 2026, 12:22 | 6.39 | 6.39 mg/l |
| 9 Mar 2026, 09:16 | 5.79 | 5.79 mg/l |
| 3 Feb 2026, 11:31 | 5.79 | 5.79 mg/l |
| 5 Jan 2026, 12:21 | 8.07 | 8.07 mg/l |
| 5 Dec 2025, 12:36 | 6.56 | 6.56 mg/l |
| 6 Nov 2025, 10:34 | 7.58 | 7.58 mg/l |
| 3 Oct 2025, 10:09 | 7.79 | 7.79 mg/l |
| 1 Sep 2025, 10:50 | 5.77 | 5.77 mg/l |
| 1 Aug 2025, 13:26 | 5.87 | 5.87 mg/l |
| 1 Jul 2025, 12:28 | 4 | 4 mg/l |
| 12 Jun 2025, 13:05 | 5.56 | 5.56 mg/l |
| 23 May 2025, 13:43 | 6.48 | 6.48 mg/l |
| 8 Apr 2025, 12:36 | 6.89 | 6.89 mg/l |
| 6 Mar 2025, 11:17 | 5.89 | 5.89 mg/l |
| 17 Feb 2025, 09:16 | 5.98 | 5.98 mg/l |
| 24 Jan 2025, 12:07 | 0.01 | 0.01 mg/l |
| 3 Dec 2024, 12:17 | 5.08 | 5.08 mg/l |
| 6 Nov 2024, 11:23 | 6.48 | 6.48 mg/l |
| 1 Oct 2024, 14:11 | 3.27 | 3.27 mg/l |
| 3 Sep 2024, 10:00 | 4.41 | 4.41 mg/l |
| 6 Aug 2024, 09:50 | 4.55 | 4.55 mg/l |
| 2 Jul 2024, 12:25 | 4.09 | 4.09 mg/l |
| 5 Jun 2024, 10:59 | 3.83 | 3.83 mg/l |
| 4 Mar 2024, 12:34 | 3.57 | 3.57 mg/l |
| 5 Feb 2024, 13:10 | 6.27 | 6.27 mg/l |
| 11 Jan 2024, 10:33 | 5.08 | 5.08 mg/l |
| 11 Dec 2023, 09:24 | 3.88 | 3.88 mg/l |
| 16 Nov 2023, 11:10 | 4.37 | 4.37 mg/l |
| 13 Oct 2023, 10:28 | 4.49 | 4.49 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.051 mg/l
Sampled 5 Aug 2026, 57 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 0.051 | 0.051 mg/l |
| 20 Jul 2026, 10:46 | 0.057 | 0.057 mg/l |
| 16 Jun 2026, 12:09 | 0.075 | 0.075 mg/l |
| 28 May 2026, 12:43 | 0.075 | 0.075 mg/l |
| 1 Apr 2026, 12:22 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Mar 2026, 09:16 | 0.069 | 0.069 mg/l |
| 3 Feb 2026, 11:31 | 0.074 | 0.074 mg/l |
| 5 Jan 2026, 12:21 | 0.097 | 0.097 mg/l |
| 5 Dec 2025, 12:36 | 0.092 | 0.092 mg/l |
| 6 Nov 2025, 10:34 | 0.068 | 0.068 mg/l |
| 3 Oct 2025, 10:09 | 0.067 | 0.067 mg/l |
| 1 Sep 2025, 10:50 | 0.074 | 0.074 mg/l |
| 1 Aug 2025, 13:26 | 0.082 | 0.082 mg/l |
| 1 Jul 2025, 12:28 | 0.11 | 0.11 mg/l |
| 12 Jun 2025, 13:05 | 0.081 | 0.081 mg/l |
| 23 May 2025, 13:43 | 0.092 | 0.092 mg/l |
| 8 Apr 2025, 12:36 | 0.025 | 0.025 mg/l |
| 6 Mar 2025, 11:17 | 0.027 | 0.027 mg/l |
| 17 Feb 2025, 09:16 | 0.079 | 0.079 mg/l |
| 24 Jan 2025, 12:07 | 1.4 | 1.4 mg/l |
| 6 Nov 2024, 11:23 | 0.2 | 0.2 mg/l |
| 1 Oct 2024, 14:11 | 0.14 | 0.14 mg/l |
| 3 Sep 2024, 10:00 | 0.11 | 0.11 mg/l |
| 6 Aug 2024, 09:50 | 0.14 | 0.14 mg/l |
| 2 Jul 2024, 12:25 | 0.088 | 0.088 mg/l |
| 5 Jun 2024, 10:59 | 0.11 | 0.11 mg/l |
| 4 Mar 2024, 12:34 | 0.69 | 0.69 mg/l |
| 11 Jan 2024, 10:33 | 0.14 | 0.14 mg/l |
| 11 Dec 2023, 09:24 | 0.15 | 0.15 mg/l |
| 16 Nov 2023, 11:10 | 0.16 | 0.16 mg/l |
| 13 Oct 2023, 10:28 | 0.26 | 0.26 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
646 µS/cm
Sampled 5 Aug 2026, 57 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 09:46 | 646 | 646 µS/cm |
| 20 Jul 2026, 10:46 | 673 | 673 µS/cm |
| 16 Jun 2026, 12:09 | 660 | 660 µS/cm |
| 28 May 2026, 12:43 | 657 | 657 µS/cm |
| 1 Apr 2026, 12:22 | 670 | 670 µS/cm |
| 9 Mar 2026, 09:16 | 676 | 676 µS/cm |
| 3 Feb 2026, 11:31 | 674 | 674 µS/cm |
| 5 Jan 2026, 12:21 | 752 | 752 µS/cm |
| 5 Dec 2025, 12:36 | 693 | 693 µS/cm |
| 6 Nov 2025, 10:34 | 689 | 689 µS/cm |
| 3 Oct 2025, 10:09 | 718 | 718 µS/cm |
| 1 Sep 2025, 10:50 | 655 | 655 µS/cm |
| 1 Aug 2025, 13:26 | 637 | 637 µS/cm |
| 1 Jul 2025, 12:28 | 647 | 647 µS/cm |
| 12 Jun 2025, 13:05 | 667 | 667 µS/cm |
| 23 May 2025, 13:43 | 689 | 689 µS/cm |
| 8 Apr 2025, 12:36 | 679 | 679 µS/cm |
| 6 Mar 2025, 11:17 | 693 | 693 µS/cm |
| 17 Feb 2025, 09:16 | 711 | 711 µS/cm |
| 24 Jan 2025, 12:07 | 880 | 880 µS/cm |
| 3 Dec 2024, 12:17 | 678 | 678 µS/cm |
| 6 Nov 2024, 11:23 | 695 | 695 µS/cm |
| 1 Oct 2024, 14:11 | 571 | 571 µS/cm |
| 3 Sep 2024, 10:00 | 673 | 673 µS/cm |
| 6 Aug 2024, 09:50 | 675 | 675 µS/cm |
| 2 Jul 2024, 12:25 | 662 | 662 µS/cm |
| 5 Jun 2024, 10:59 | 663 | 663 µS/cm |
| 4 Mar 2024, 12:34 | 756 | 756 µS/cm |
| 5 Feb 2024, 13:10 | 701 | 701 µS/cm |
| 11 Jan 2024, 10:33 | 654 | 654 µS/cm |
| 11 Dec 2023, 09:24 | 611 | 611 µS/cm |
| 16 Nov 2023, 11:10 | 627 | 627 µS/cm |
| 13 Oct 2023, 10:28 | 672 | 672 µS/cm |
Everything measured here
57 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 57 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Aug 2026 | 88.1% 5 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Aug 2026 | 8.05 mg/l 5 Aug 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Aug 2026 | 19.6 °C 5 Aug 2026 |
| pH 0061 | River water | 32 | Oct 2023 – Aug 2026 | 7.96 5 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – Jul 2026 | below 0.03 mg/l 20 Jul 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Aug 2026 | 5.29 mg/l 5 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Oct 2023 – Aug 2026 | 0.051 mg/l 5 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Aug 2026 | 646 µS/cm 5 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Jun 2024 – Jun 2024 | below 0.004 µg/l 5 Jun 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 5 Jun 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 33 | Oct 2023 – Aug 2026 | 240 mg/l 5 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Oct 2023 – Jul 2026 | below 0.00091 mg/l 20 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – Aug 2026 | 0.014 mg/l 5 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Aug 2026 | 5.3 mg/l 5 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Jun 2024 – Jun 2024 | 0.0014 µg/l 5 Jun 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jun 2024 – Jun 2024 | 0.0022 µg/l 5 Jun 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 5 Jun 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Jun 2024 – Jun 2024 | 0.001 µg/l 5 Jun 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Jun 2024 – Jun 2024 | 0.00052 µg/l 5 Jun 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jun 2024 – Jun 2024 | 0.002 µg/l 5 Jun 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jun 2024 – Jun 2024 | 0.002 µg/l 5 Jun 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 5 Jun 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jun 2024 – Jun 2024 | 0.0028 µg/l 5 Jun 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jun 2024 – Jun 2024 | 0.0031 µg/l 5 Jun 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Jun 2024 – Jun 2024 | 0.0019 µg/l 5 Jun 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 5 Jun 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jun 2024 – Jun 2024 | 0.0023 µg/l 5 Jun 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Jun 2024 – Jun 2024 | below 0.006 µg/l 5 Jun 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 5 Jun 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Jun 2024 – Jun 2024 | below 0.004 µg/l 5 Jun 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 5 Jun 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.