Hyndburn Brook above the confluence with River Calder
EA name: HYNDBURN BROOK PTC RIVER CALDER
Environment Agency sampling point NW-88003518 · 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
- 29 May 2026, 12:094 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 18 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 375171, 432816As published, to the nearest 1 m. Open in a map
- River, by its own name
- Hyndburn Brook
- River, by the map
- Hyndburn BrookPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Whalley Weir On the River Calder · 7.0 km along the river
- Nearest gauge upstream
- Milnshaw On the River Hyndburn · 7.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (21 samples)
Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.9%
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 102.9 | 102.9% |
| 11 May 2026, 11:52 | 120.8 | 120.8% |
| 16 Apr 2026, 15:22 | 120.7 | 120.7% |
| 13 Apr 2026, 13:41 | 132.4 | 132.4% |
| 24 Mar 2026, 10:05 | 104.6 | 104.6% |
| 10 Mar 2026, 10:46 | 112.2 | 112.2% |
| 16 Feb 2026, 11:59 | 99 | 99% |
| 3 Feb 2026, 11:47 | 98.5 | 98.5% |
| 27 Jan 2026, 11:35 | 101.1 | 101.1% |
| 14 Jan 2026, 12:54 | 101.1 | 101.1% |
| 15 Dec 2025, 12:36 | 102 | 102% |
| 2 Dec 2025, 12:43 | 99.9 | 99.9% |
| 17 Nov 2025, 10:13 | 99.4 | 99.4% |
| 5 Nov 2025, 10:12 | 100.5 | 100.5% |
| 12 Mar 2025, 11:20 | 111.5 | 111.5% |
| 12 Feb 2025, 12:09 | 103.6 | 103.6% |
| 28 Jan 2025, 14:14 | 101.8 | 101.8% |
| 9 Dec 2024, 12:54 | 101.7 | 101.7% |
| 19 Nov 2024, 11:57 | 104.8 | 104.8% |
| 14 Oct 2024, 11:30 | 100.9 | 100.9% |
| 17 Sep 2024, 11:50 | 99.3 | 99.3% |
| 21 Aug 2024, 13:52 | 109.2 | 109.2% |
| 16 Jul 2024, 12:01 | 102.3 | 102.3% |
| 20 Jun 2024, 12:35 | 105.8 | 105.8% |
| 13 May 2024, 09:46 | 95.5 | 95.5% |
| 19 Apr 2024, 11:49 | 108.8 | 108.8% |
| 5 Apr 2024, 11:08 | 104 | 104% |
| 18 Mar 2024, 11:00 | 105.3 | 105.3% |
| 21 Feb 2024, 11:54 | 103.8 | 103.8% |
| 29 Jan 2024, 10:23 | 98.1 | 98.1% |
| 5 Dec 2023, 13:22 | 99.3 | 99.3% |
| 20 Nov 2023, 11:15 | 99.6 | 99.6% |
| 18 Oct 2023, 09:47 | 94.3 | 94.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10 mg/l
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 10 | 10 mg/l |
| 11 May 2026, 11:52 | 13.4 | 13.4 mg/l |
| 16 Apr 2026, 15:22 | 13.1 | 13.1 mg/l |
| 13 Apr 2026, 13:41 | 15.3 | 15.3 mg/l |
| 24 Mar 2026, 10:05 | 12 | 12 mg/l |
| 10 Mar 2026, 10:46 | 13.3 | 13.3 mg/l |
| 16 Feb 2026, 11:59 | 12.4 | 12.4 mg/l |
| 3 Feb 2026, 11:47 | 12.5 | 12.5 mg/l |
| 27 Jan 2026, 11:35 | 12.9 | 12.9 mg/l |
| 14 Jan 2026, 12:54 | 13 | 13 mg/l |
| 15 Dec 2025, 12:36 | 11.8 | 11.8 mg/l |
| 2 Dec 2025, 12:43 | 11.9 | 11.9 mg/l |
| 17 Nov 2025, 10:13 | 12.2 | 12.2 mg/l |
| 5 Nov 2025, 10:12 | 10.8 | 10.8 mg/l |
| 12 Mar 2025, 11:20 | 14.1 | 14.1 mg/l |
| 12 Feb 2025, 12:09 | 13.1 | 13.1 mg/l |
| 28 Jan 2025, 14:14 | 12.5 | 12.5 mg/l |
| 9 Dec 2024, 12:54 | 12.3 | 12.3 mg/l |
| 19 Nov 2024, 11:57 | 13.2 | 13.2 mg/l |
| 14 Oct 2024, 11:30 | 11.9 | 11.9 mg/l |
| 17 Sep 2024, 11:50 | 10.7 | 10.7 mg/l |
| 21 Aug 2024, 13:52 | 11 | 11 mg/l |
| 16 Jul 2024, 12:01 | 10.2 | 10.2 mg/l |
| 20 Jun 2024, 12:35 | 10.9 | 10.9 mg/l |
| 13 May 2024, 09:46 | 9.77 | 9.77 mg/l |
| 19 Apr 2024, 11:49 | 12.3 | 12.3 mg/l |
| 5 Apr 2024, 11:08 | 11.7 | 11.7 mg/l |
| 18 Mar 2024, 11:00 | 12.2 | 12.2 mg/l |
| 21 Feb 2024, 11:54 | 12.2 | 12.2 mg/l |
| 29 Jan 2024, 10:23 | 11.8 | 11.8 mg/l |
| 5 Dec 2023, 13:22 | 12.5 | 12.5 mg/l |
| 20 Nov 2023, 11:15 | 11.3 | 11.3 mg/l |
| 18 Oct 2023, 09:47 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
16.5 °C
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 16.5 | 16.5 °C |
| 11 May 2026, 11:52 | 10.7 | 10.7 °C |
| 16 Apr 2026, 15:22 | 11.6 | 11.6 °C |
| 13 Apr 2026, 13:41 | 9 | 9 °C |
| 24 Mar 2026, 10:05 | 9.1 | 9.1 °C |
| 10 Mar 2026, 10:46 | 8 | 8 °C |
| 16 Feb 2026, 11:59 | 5.7 | 5.7 °C |
| 3 Feb 2026, 11:47 | 5.3 | 5.3 °C |
| 27 Jan 2026, 11:35 | 5 | 5 °C |
| 14 Jan 2026, 12:54 | 4.8 | 4.8 °C |
| 15 Dec 2025, 12:36 | 8.8 | 8.8 °C |
| 2 Dec 2025, 12:43 | 7.6 | 7.6 °C |
| 17 Nov 2025, 10:13 | 6.4 | 6.4 °C |
| 5 Nov 2025, 10:12 | 12.2 | 12.2 °C |
| 12 Mar 2025, 11:20 | 5.4 | 5.4 °C |
| 12 Feb 2025, 12:09 | 5.4 | 5.4 °C |
| 28 Jan 2025, 14:14 | 6.4 | 6.4 °C |
| 9 Dec 2024, 12:54 | 7 | 7 °C |
| 19 Nov 2024, 11:57 | 5.4 | 5.4 °C |
| 14 Oct 2024, 11:30 | 8.2 | 8.2 °C |
| 17 Sep 2024, 11:50 | 12.1 | 12.1 °C |
| 21 Aug 2024, 13:52 | 14.8 | 14.8 °C |
| 16 Jul 2024, 12:01 | 15.3 | 15.3 °C |
| 20 Jun 2024, 12:35 | 13.8 | 13.8 °C |
| 13 May 2024, 09:46 | 14.2 | 14.2 °C |
| 19 Apr 2024, 11:49 | 9.8 | 9.8 °C |
| 5 Apr 2024, 11:08 | 10 | 10 °C |
| 18 Mar 2024, 11:00 | 8.7 | 8.7 °C |
| 21 Feb 2024, 11:54 | 8.3 | 8.3 °C |
| 29 Jan 2024, 10:23 | 7.3 | 7.3 °C |
| 5 Dec 2023, 13:22 | 5.4 | 5.4 °C |
| 20 Nov 2023, 11:15 | 9.6 | 9.6 °C |
| 18 Oct 2023, 09:47 | 10.1 | 10.1 °C |
pH
code 0061
8.21
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 8.21 | 8.21 |
| 11 May 2026, 11:52 | 8.73 | 8.73 |
| 16 Apr 2026, 15:22 | 8.95 | 8.95 |
| 13 Apr 2026, 13:41 | 9.07 | 9.07 |
| 24 Mar 2026, 10:05 | 8.26 | 8.26 |
| 10 Mar 2026, 10:46 | 8.37 | 8.37 |
| 16 Feb 2026, 11:59 | 7.9 | 7.9 |
| 3 Feb 2026, 11:47 | 8.14 | 8.14 |
| 27 Jan 2026, 11:35 | 7.89 | 7.89 |
| 14 Jan 2026, 12:54 | 8.12 | 8.12 |
| 15 Dec 2025, 12:36 | 7.87 | 7.87 |
| 2 Dec 2025, 12:43 | 7.85 | 7.85 |
| 17 Nov 2025, 10:13 | 8.04 | 8.04 |
| 5 Nov 2025, 10:12 | 7.83 | 7.83 |
| 12 Mar 2025, 11:20 | 8.44 | 8.44 |
| 12 Feb 2025, 12:09 | 8.27 | 8.27 |
| 28 Jan 2025, 14:14 | 8.01 | 8.01 |
| 9 Dec 2024, 12:54 | 8.18 | 8.18 |
| 19 Nov 2024, 11:57 | 7.76 | 7.76 |
| 14 Oct 2024, 11:30 | 8.12 | 8.12 |
| 17 Sep 2024, 11:50 | 8.07 | 8.07 |
| 21 Aug 2024, 13:52 | 8.67 | 8.67 |
| 16 Jul 2024, 12:01 | 8.31 | 8.31 |
| 20 Jun 2024, 12:35 | 8.28 | 8.28 |
| 13 May 2024, 09:46 | 8.03 | 8.03 |
| 19 Apr 2024, 11:49 | 8.31 | 8.31 |
| 5 Apr 2024, 11:08 | 8 | 8 |
| 18 Mar 2024, 11:00 | 8.2 | 8.2 |
| 21 Feb 2024, 11:54 | 7.8 | 7.8 |
| 29 Jan 2024, 10:23 | 8.14 | 8.14 |
| 5 Dec 2023, 13:22 | 7.97 | 7.97 |
| 20 Nov 2023, 11:15 | 7.86 | 7.86 |
| 18 Oct 2023, 09:47 | 8.01 | 8.01 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 May 2026, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 15:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Apr 2026, 13:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Mar 2026, 10:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2026, 10:46 | 0.04 | 0.04 mg/l |
| 16 Feb 2026, 11:59 | 0.056 | 0.056 mg/l |
| 3 Feb 2026, 11:47 | 0.07 | 0.07 mg/l |
| 27 Jan 2026, 11:35 | 0.23 | 0.23 mg/l |
| 14 Jan 2026, 12:54 | 0.075 | 0.075 mg/l |
| 15 Dec 2025, 12:36 | 0.15 | 0.15 mg/l |
| 2 Dec 2025, 12:43 | 0.05 | 0.05 mg/l |
| 17 Nov 2025, 10:13 | 0.059 | 0.059 mg/l |
| 5 Nov 2025, 10:12 | 0.037 | 0.037 mg/l |
| 12 Mar 2025, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Feb 2025, 12:09 | 0.16 | 0.16 mg/l |
| 28 Jan 2025, 14:14 | 0.11 | 0.11 mg/l |
| 9 Dec 2024, 12:54 | 0.076 | 0.076 mg/l |
| 19 Nov 2024, 11:57 | 0.076 | 0.076 mg/l |
| 14 Oct 2024, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Sep 2024, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Aug 2024, 13:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2024, 12:35 | 0.055 | 0.055 mg/l |
| 13 May 2024, 09:46 | 0.1 | 0.1 mg/l |
| 19 Apr 2024, 11:49 | 0.037 | 0.037 mg/l |
| 5 Apr 2024, 11:08 | 0.063 | 0.063 mg/l |
| 18 Mar 2024, 11:00 | 0.036 | 0.036 mg/l |
| 21 Feb 2024, 11:54 | 0.12 | 0.12 mg/l |
| 29 Jan 2024, 10:23 | 0.14 | 0.14 mg/l |
| 5 Dec 2023, 13:22 | 0.095 | 0.095 mg/l |
| 20 Nov 2023, 11:15 | 0.06 | 0.06 mg/l |
| 18 Oct 2023, 09:47 | 0.073 | 0.073 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.925 mg/l
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 0.925 | 0.925 mg/l |
| 11 May 2026, 11:52 | 0.791 | 0.791 mg/l |
| 16 Apr 2026, 15:22 | 0.694 | 0.694 mg/l |
| 13 Apr 2026, 13:41 | 0.781 | 0.781 mg/l |
| 24 Mar 2026, 10:05 | 0.927 | 0.927 mg/l |
| 10 Mar 2026, 10:46 | 1.28 | 1.28 mg/l |
| 16 Feb 2026, 11:59 | 1.39 | 1.39 mg/l |
| 3 Feb 2026, 11:47 | 1.39 | 1.39 mg/l |
| 27 Jan 2026, 11:35 | 1.19 | 1.19 mg/l |
| 14 Jan 2026, 12:54 | 1.59 | 1.59 mg/l |
| 15 Dec 2025, 12:36 | 0.981 | 0.981 mg/l |
| 2 Dec 2025, 12:43 | 1.39 | 1.39 mg/l |
| 17 Nov 2025, 10:13 | 1.19 | 1.19 mg/l |
| 5 Nov 2025, 10:12 | 0.895 | 0.895 mg/l |
| 12 Mar 2025, 11:20 | 0.782 | 0.782 mg/l |
| 12 Feb 2025, 12:09 | 1.28 | 1.28 mg/l |
| 28 Jan 2025, 14:14 | 1.29 | 1.29 mg/l |
| 9 Dec 2024, 12:54 | 1.29 | 1.29 mg/l |
| 19 Nov 2024, 11:57 | 0.732 | 0.732 mg/l |
| 14 Oct 2024, 11:30 | 0.782 | 0.782 mg/l |
| 17 Sep 2024, 11:50 | 0.786 | 0.786 mg/l |
| 21 Aug 2024, 13:52 | 0.993 | 0.993 mg/l |
| 16 Jul 2024, 12:01 | 0.984 | 0.984 mg/l |
| 20 Jun 2024, 12:35 | 1.06 | 1.06 mg/l |
| 13 May 2024, 09:46 | 1.43 | 1.43 mg/l |
| 19 Apr 2024, 11:49 | 0.68 | 0.68 mg/l |
| 5 Apr 2024, 11:08 | 0.631 | 0.631 mg/l |
| 18 Mar 2024, 11:00 | 0.869 | 0.869 mg/l |
| 21 Feb 2024, 11:54 | 0.739 | 0.739 mg/l |
| 29 Jan 2024, 10:23 | 1.08 | 1.08 mg/l |
| 5 Dec 2023, 13:22 | 1.19 | 1.19 mg/l |
| 20 Nov 2023, 11:15 | 1.19 | 1.19 mg/l |
| 18 Oct 2023, 09:47 | 0.977 | 0.977 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.049 mg/l
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 0.049 | 0.049 mg/l |
| 11 May 2026, 11:52 | 0.024 | 0.024 mg/l |
| 16 Apr 2026, 15:22 | 0.032 | 0.032 mg/l |
| 13 Apr 2026, 13:41 | 0.025 | 0.025 mg/l |
| 24 Mar 2026, 10:05 | 0.023 | 0.023 mg/l |
| 10 Mar 2026, 10:46 | 0.043 | 0.043 mg/l |
| 16 Feb 2026, 11:59 | 0.045 | 0.045 mg/l |
| 3 Feb 2026, 11:47 | 0.051 | 0.051 mg/l |
| 27 Jan 2026, 11:35 | 0.11 | 0.11 mg/l |
| 14 Jan 2026, 12:54 | 0.055 | 0.055 mg/l |
| 15 Dec 2025, 12:36 | 0.11 | 0.11 mg/l |
| 2 Dec 2025, 12:43 | 0.057 | 0.057 mg/l |
| 17 Nov 2025, 10:13 | 0.051 | 0.051 mg/l |
| 5 Nov 2025, 10:12 | 0.073 | 0.073 mg/l |
| 12 Mar 2025, 11:20 | 0.022 | 0.022 mg/l |
| 12 Feb 2025, 12:09 | 0.039 | 0.039 mg/l |
| 28 Jan 2025, 14:14 | 0.061 | 0.061 mg/l |
| 9 Dec 2024, 12:54 | 0.051 | 0.051 mg/l |
| 19 Nov 2024, 11:57 | 0.083 | 0.083 mg/l |
| 14 Oct 2024, 11:30 | 0.051 | 0.051 mg/l |
| 17 Sep 2024, 11:50 | 0.061 | 0.061 mg/l |
| 21 Aug 2024, 13:52 | 0.051 | 0.051 mg/l |
| 16 Jul 2024, 12:01 | 0.053 | 0.053 mg/l |
| 20 Jun 2024, 12:35 | 0.072 | 0.072 mg/l |
| 13 May 2024, 09:46 | 0.033 | 0.033 mg/l |
| 19 Apr 2024, 11:49 | 0.061 | 0.061 mg/l |
| 5 Apr 2024, 11:08 | 0.059 | 0.059 mg/l |
| 18 Mar 2024, 11:00 | 0.048 | 0.048 mg/l |
| 21 Feb 2024, 11:54 | 0.094 | 0.094 mg/l |
| 29 Jan 2024, 10:23 | 0.039 | 0.039 mg/l |
| 5 Dec 2023, 13:22 | 0.066 | 0.066 mg/l |
| 20 Nov 2023, 11:15 | 0.052 | 0.052 mg/l |
| 18 Oct 2023, 09:47 | 0.05 | 0.05 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
452 µS/cm
Sampled 29 May 2026, 4 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 12:09 | 452 | 452 µS/cm |
| 11 May 2026, 11:52 | 468 | 468 µS/cm |
| 16 Apr 2026, 15:22 | 293 | 293 µS/cm |
| 13 Apr 2026, 13:41 | 372 | 372 µS/cm |
| 24 Mar 2026, 10:05 | 414 | 414 µS/cm |
| 10 Mar 2026, 10:46 | 411 | 411 µS/cm |
| 16 Feb 2026, 11:59 | 321 | 321 µS/cm |
| 3 Feb 2026, 11:47 | 381 | 381 µS/cm |
| 27 Jan 2026, 11:35 | 231 | 231 µS/cm |
| 14 Jan 2026, 12:54 | 348 | 348 µS/cm |
| 15 Dec 2025, 12:36 | 181 | 181 µS/cm |
| 2 Dec 2025, 12:43 | 273 | 273 µS/cm |
| 17 Nov 2025, 10:13 | 337 | 337 µS/cm |
| 5 Nov 2025, 10:12 | 238 | 238 µS/cm |
| 12 Mar 2025, 11:20 | 469 | 469 µS/cm |
| 12 Feb 2025, 12:09 | 472 | 472 µS/cm |
| 28 Jan 2025, 14:14 | 304 | 304 µS/cm |
| 9 Dec 2024, 12:54 | 333 | 333 µS/cm |
| 19 Nov 2024, 11:57 | 841 | 841 µS/cm |
| 14 Oct 2024, 11:30 | 406 | 406 µS/cm |
| 17 Sep 2024, 11:50 | 399 | 399 µS/cm |
| 21 Aug 2024, 13:52 | 465 | 465 µS/cm |
| 16 Jul 2024, 12:01 | 461 | 461 µS/cm |
| 20 Jun 2024, 12:35 | 450 | 450 µS/cm |
| 13 May 2024, 09:46 | 322 | 322 µS/cm |
| 19 Apr 2024, 11:49 | 277 | 277 µS/cm |
| 5 Apr 2024, 11:08 | 199 | 199 µS/cm |
| 18 Mar 2024, 11:00 | 316 | 316 µS/cm |
| 21 Feb 2024, 11:54 | 176 | 176 µS/cm |
| 29 Jan 2024, 10:23 | 367 | 367 µS/cm |
| 5 Dec 2023, 13:22 | 268 | 268 µS/cm |
| 20 Nov 2023, 11:15 | 258 | 258 µS/cm |
| 18 Oct 2023, 09:47 | 367 | 367 µS/cm |
Everything measured here
60 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 60 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – May 2026 | 102.9% 29 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – May 2026 | 10 mg/l 29 May 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – May 2026 | 16.5 °C 29 May 2026 |
| pH 0061 | River water | 33 | Oct 2023 – May 2026 | 8.21 29 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – May 2026 | below 0.03 mg/l 29 May 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – May 2026 | 0.925 mg/l 29 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – May 2026 | 0.049 mg/l 29 May 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – May 2026 | 452 µS/cm 29 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | May 2024 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | May 2024 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 3 | Nov 2023 – Jan 2025 | below 0.004 µg/l 28 Jan 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 3 | Nov 2023 – Jan 2025 | below 0.005 µg/l 28 Jan 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | May 2024 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 33 | Oct 2023 – May 2026 | 150 mg/l 29 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 33 | Oct 2023 – May 2026 | below 0.00088 mg/l 29 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 26 | Feb 2024 – May 2026 | 1.5 mg/l 29 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – May 2026 | 0.015 mg/l 29 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – May 2026 | 0.94 mg/l 29 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | May 2024 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | May 2024 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 3 | Nov 2023 – Jan 2025 | 0.0047 µg/l 28 Jan 2025 |
| Perfluorobutanoic acid 2995 | River water | 3 | Nov 2023 – Jan 2025 | 0.003 µg/l 28 Jan 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | May 2024 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| Perfluorodecanoic acid 8892 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 3 | Nov 2023 – Jan 2025 | below 0.005 µg/l 28 Jan 2025 |
| Perfluorododecanoic acid 8894 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluoroheptanoic acid 8889 | River water | 3 | Nov 2023 – Jan 2025 | 0.0012 µg/l 28 Jan 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | May 2024 – Jan 2025 | 0.0039 µg/l 28 Jan 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluorononanoic acid 8891 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | Nov 2023 – Jan 2025 | below 0.001 µg/l 28 Jan 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 3 | Nov 2023 – Jan 2025 | 0.00086 µg/l 28 Jan 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 3 | Nov 2023 – Jan 2025 | 0.00091 µg/l 28 Jan 2025 |
| Perfluorooctanoic acid 8890 | River water | 3 | Nov 2023 – Jan 2025 | 0.0039 µg/l 28 Jan 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 3 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 28 Jan 2025 |
| Perfluoropentanoic acid 8887 | River water | 3 | Nov 2023 – Jan 2025 | 0.0036 µg/l 28 Jan 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 3 | Nov 2023 – Jan 2025 | below 0.006 µg/l 28 Jan 2025 |
| Perfluorotridecanoic acid 2955 | River water | 3 | Nov 2023 – Jan 2025 | below 0.005 µg/l 28 Jan 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 3 | Nov 2023 – Jan 2025 | below 0.004 µg/l 28 Jan 2025 |
| Perfluoroundecanoic acid 8893 | River water | 3 | Nov 2023 – Jan 2025 | below 0.002 µg/l 28 Jan 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.