Ingrebourne at Harold Court Road
EA name: INGREBOURNE AT HAROLD COURT RD
Environment Agency sampling point TH-PRGR0021 · 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
- 1 Sep 2026, 11:3930 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 34 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 555900, 191400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Ingrebourne
- River, by the map
- Ingrebourne RiverPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- Gaynes Park On the River Ingrebourne · 8.0 km along the riverBeside Harold Park: too close to say above or below.
- Why it was sampled
- Environmental monitoring statutory (EU directives) (34 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
91.3%
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 91.3 | 91.3% |
| 12 Aug 2026, 08:44 | 90.4 | 90.4% |
| 24 Jul 2026, 10:17 | 102 | 102% |
| 12 Jun 2026, 11:26 | 89.3 | 89.3% |
| 18 May 2026, 11:38 | 85.4 | 85.4% |
| 23 Apr 2026, 11:27 | 97.8 | 97.8% |
| 23 Mar 2026, 10:59 | 104.3 | 104.3% |
| 4 Feb 2026, 09:33 | 96.5 | 96.5% |
| 16 Jan 2026, 09:32 | 97.5 | 97.5% |
| 4 Dec 2025, 11:01 | 90.1 | 90.1% |
| 13 Nov 2025, 13:15 | 89.5 | 89.5% |
| 23 Oct 2025, 10:32 | 89.7 | 89.7% |
| 2 Sep 2025, 12:03 | 86.1 | 86.1% |
| 18 Aug 2025, 13:51 | 90.8 | 90.8% |
| 4 Jul 2025, 14:14 | 94.8 | 94.8% |
| 6 Jun 2025, 08:50 | 90.8 | 90.8% |
| 23 May 2025, 10:49 | 93.9 | 93.9% |
| 24 Apr 2025, 13:46 | 97.1 | 97.1% |
| 19 Mar 2025, 10:05 | 101.5 | 101.5% |
| 6 Feb 2025, 09:55 | 95.6 | 95.6% |
| 15 Jan 2025, 11:05 | 97.9 | 97.9% |
| 3 Dec 2024, 08:40 | 93.4 | 93.4% |
| 5 Nov 2024, 11:40 | 94.1 | 94.1% |
| 7 Oct 2024, 13:14 | 91.8 | 91.8% |
| 12 Sep 2024, 12:12 | 89.9 | 89.9% |
| 2 Aug 2024, 12:10 | 91.1 | 91.1% |
| 3 Jul 2024, 11:34 | 93 | 93% |
| 7 Jun 2024, 09:34 | 94.5 | 94.5% |
| 11 Mar 2024, 09:37 | 94.7 | 94.7% |
| 6 Feb 2024, 14:54 | 92.8 | 92.8% |
| 3 Jan 2024, 12:02 | 94.9 | 94.9% |
| 14 Dec 2023, 11:28 | 96.4 | 96.4% |
| 13 Nov 2023, 11:38 | 95.3 | 95.3% |
| 2 Oct 2023, 09:37 | 92 | 92% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.33 mg/l
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 8.33 | 8.33 mg/l |
| 12 Aug 2026, 08:44 | 8.17 | 8.17 mg/l |
| 24 Jul 2026, 10:17 | 9.07 | 9.07 mg/l |
| 12 Jun 2026, 11:26 | 8.72 | 8.72 mg/l |
| 18 May 2026, 11:38 | 8.57 | 8.57 mg/l |
| 23 Apr 2026, 11:27 | 9.88 | 9.88 mg/l |
| 23 Mar 2026, 10:59 | 11.4 | 11.4 mg/l |
| 4 Feb 2026, 09:33 | 11.6 | 11.6 mg/l |
| 16 Jan 2026, 09:32 | 11.9 | 11.9 mg/l |
| 4 Dec 2025, 11:01 | 10.1 | 10.1 mg/l |
| 13 Nov 2025, 13:15 | 9.06 | 9.06 mg/l |
| 23 Oct 2025, 10:32 | 9.37 | 9.37 mg/l |
| 2 Sep 2025, 12:03 | 8.01 | 8.01 mg/l |
| 18 Aug 2025, 13:51 | 8.19 | 8.19 mg/l |
| 4 Jul 2025, 14:14 | 8.48 | 8.48 mg/l |
| 6 Jun 2025, 08:50 | 9.07 | 9.07 mg/l |
| 23 May 2025, 10:49 | 9.3 | 9.3 mg/l |
| 24 Apr 2025, 13:46 | 10 | 10 mg/l |
| 19 Mar 2025, 10:05 | 11.7 | 11.7 mg/l |
| 6 Feb 2025, 09:55 | 11.6 | 11.6 mg/l |
| 15 Jan 2025, 11:05 | 11.4 | 11.4 mg/l |
| 3 Dec 2024, 08:40 | 10.6 | 10.6 mg/l |
| 5 Nov 2024, 11:40 | 9.55 | 9.55 mg/l |
| 7 Oct 2024, 13:14 | 9.02 | 9.02 mg/l |
| 12 Sep 2024, 12:12 | 8.89 | 8.89 mg/l |
| 2 Aug 2024, 12:10 | 8.04 | 8.04 mg/l |
| 3 Jul 2024, 11:34 | 8.85 | 8.85 mg/l |
| 7 Jun 2024, 09:34 | 9.38 | 9.38 mg/l |
| 11 Mar 2024, 09:37 | 10.8 | 10.8 mg/l |
| 6 Feb 2024, 14:54 | 10.2 | 10.2 mg/l |
| 3 Jan 2024, 12:02 | 10.8 | 10.8 mg/l |
| 14 Dec 2023, 11:28 | 11.4 | 11.4 mg/l |
| 13 Nov 2023, 11:38 | 10.5 | 10.5 mg/l |
| 2 Oct 2023, 09:37 | 8.56 | 8.56 mg/l |
Water temperature
code 0076 · °C
19.7 °C
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 19.7 | 19.7 °C |
| 12 Aug 2026, 08:44 | 20.2 | 20.2 °C |
| 24 Jul 2026, 10:17 | 21 | 21 °C |
| 12 Jun 2026, 11:26 | 16.4 | 16.4 °C |
| 18 May 2026, 11:38 | 15.1 | 15.1 °C |
| 23 Apr 2026, 11:27 | 14.8 | 14.8 °C |
| 23 Mar 2026, 10:59 | 11.3 | 11.3 °C |
| 4 Feb 2026, 09:33 | 7.3 | 7.3 °C |
| 16 Jan 2026, 09:32 | 6.8 | 6.8 °C |
| 4 Dec 2025, 11:01 | 10.2 | 10.2 °C |
| 13 Nov 2025, 13:15 | 14.7 | 14.7 °C |
| 23 Oct 2025, 10:32 | 13.3 | 13.3 °C |
| 2 Sep 2025, 12:03 | 18.7 | 18.7 °C |
| 18 Aug 2025, 13:51 | 20.3 | 20.3 °C |
| 4 Jul 2025, 14:14 | 20.7 | 20.7 °C |
| 6 Jun 2025, 08:50 | 15.3 | 15.3 °C |
| 23 May 2025, 10:49 | 15.7 | 15.7 °C |
| 24 Apr 2025, 13:46 | 13.7 | 13.7 °C |
| 19 Mar 2025, 10:05 | 9.1 | 9.1 °C |
| 6 Feb 2025, 09:55 | 6.8 | 6.8 °C |
| 15 Jan 2025, 11:05 | 8.6 | 8.6 °C |
| 3 Dec 2024, 08:40 | 9.6 | 9.6 °C |
| 5 Nov 2024, 11:40 | 14.6 | 14.6 °C |
| 7 Oct 2024, 13:14 | 16.1 | 16.1 °C |
| 12 Sep 2024, 12:12 | 15.8 | 15.8 °C |
| 2 Aug 2024, 12:10 | 21.4 | 21.4 °C |
| 3 Jul 2024, 11:34 | 17.6 | 17.6 °C |
| 7 Jun 2024, 09:34 | 15.6 | 15.6 °C |
| 11 Mar 2024, 09:37 | 9.3 | 9.3 °C |
| 6 Feb 2024, 14:54 | 11.2 | 11.2 °C |
| 3 Jan 2024, 12:02 | 9.4 | 9.4 °C |
| 14 Dec 2023, 11:28 | 8 | 8 °C |
| 13 Nov 2023, 11:38 | 11 | 11 °C |
| 2 Oct 2023, 09:37 | 18.7 | 18.7 °C |
pH
code 0061
7.18
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 7.18 | 7.18 |
| 12 Aug 2026, 08:44 | 7.45 | 7.45 |
| 24 Jul 2026, 10:17 | 7.53 | 7.53 |
| 12 Jun 2026, 11:26 | 7.43 | 7.43 |
| 18 May 2026, 11:38 | 7.64 | 7.64 |
| 23 Apr 2026, 11:27 | 7.67 | 7.67 |
| 23 Mar 2026, 10:59 | 7.64 | 7.64 |
| 4 Feb 2026, 09:33 | 7.89 | 7.89 |
| 16 Jan 2026, 09:32 | 7.89 | 7.89 |
| 4 Dec 2025, 11:01 | 7.44 | 7.44 |
| 13 Nov 2025, 13:15 | 7.54 | 7.54 |
| 23 Oct 2025, 10:32 | 7.74 | 7.74 |
| 2 Sep 2025, 12:03 | 7.36 | 7.36 |
| 18 Aug 2025, 13:51 | 7.37 | 7.37 |
| 4 Jul 2025, 14:14 | 7.58 | 7.58 |
| 6 Jun 2025, 08:50 | 7.59 | 7.59 |
| 23 May 2025, 10:49 | 7.49 | 7.49 |
| 24 Apr 2025, 13:46 | 7.68 | 7.68 |
| 19 Mar 2025, 10:05 | 7.63 | 7.63 |
| 6 Feb 2025, 09:55 | 7.73 | 7.73 |
| 15 Jan 2025, 11:05 | 7.62 | 7.62 |
| 3 Dec 2024, 08:40 | 7.91 | 7.91 |
| 5 Nov 2024, 11:40 | 7.51 | 7.51 |
| 7 Oct 2024, 13:14 | 7.57 | 7.57 |
| 12 Sep 2024, 12:12 | 7.27 | 7.27 |
| 2 Aug 2024, 12:10 | 7.61 | 7.61 |
| 3 Jul 2024, 11:34 | 7.63 | 7.63 |
| 7 Jun 2024, 09:34 | 7.57 | 7.57 |
| 11 Mar 2024, 09:37 | 7.91 | 7.91 |
| 6 Feb 2024, 14:54 | 7.78 | 7.78 |
| 3 Jan 2024, 12:02 | 7.92 | 7.92 |
| 14 Dec 2023, 11:28 | 7.89 | 7.89 |
| 13 Nov 2023, 11:38 | 7.74 | 7.74 |
| 2 Oct 2023, 09:37 | 7.46 | 7.46 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.082 mg/l
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 0.082 | 0.082 mg/l |
| 12 Aug 2026, 08:44 | 0.074 | 0.074 mg/l |
| 24 Jul 2026, 10:17 | 0.058 | 0.058 mg/l |
| 12 Jun 2026, 11:26 | 0.074 | 0.074 mg/l |
| 18 May 2026, 11:38 | 0.17 | 0.17 mg/l |
| 23 Apr 2026, 11:27 | 0.22 | 0.22 mg/l |
| 23 Mar 2026, 10:59 | 0.35 | 0.35 mg/l |
| 4 Feb 2026, 09:33 | 0.1 | 0.1 mg/l |
| 16 Jan 2026, 09:32 | 0.14 | 0.14 mg/l |
| 4 Dec 2025, 11:01 | 0.42 | 0.42 mg/l |
| 13 Nov 2025, 13:15 | 0.09 | 0.09 mg/l |
| 23 Oct 2025, 10:32 | 0.22 | 0.22 mg/l |
| 2 Sep 2025, 12:03 | 0.26 | 0.26 mg/l |
| 18 Aug 2025, 13:51 | 0.053 | 0.053 mg/l |
| 4 Jul 2025, 14:14 | 0.039 | 0.039 mg/l |
| 6 Jun 2025, 08:50 | 0.06 | 0.06 mg/l |
| 23 May 2025, 10:49 | 0.12 | 0.12 mg/l |
| 24 Apr 2025, 13:46 | 0.092 | 0.092 mg/l |
| 19 Mar 2025, 10:05 | 0.14 | 0.14 mg/l |
| 6 Feb 2025, 09:55 | 0.83 | 0.83 mg/l |
| 15 Jan 2025, 11:05 | 0.25 | 0.25 mg/l |
| 3 Dec 2024, 08:40 | 0.094 | 0.094 mg/l |
| 5 Nov 2024, 11:40 | 0.079 | 0.079 mg/l |
| 7 Oct 2024, 13:14 | 0.09 | 0.09 mg/l |
| 12 Sep 2024, 12:12 | 0.14 | 0.14 mg/l |
| 2 Aug 2024, 12:10 | 0.054 | 0.054 mg/l |
| 3 Jul 2024, 11:34 | 0.18 | 0.18 mg/l |
| 7 Jun 2024, 09:34 | 0.098 | 0.098 mg/l |
| 11 Mar 2024, 09:37 | 0.09 | 0.09 mg/l |
| 6 Feb 2024, 14:54 | 0.49 | 0.49 mg/l |
| 3 Jan 2024, 12:02 | 0.24 | 0.24 mg/l |
| 14 Dec 2023, 11:28 | 0.061 | 0.061 mg/l |
| 13 Nov 2023, 11:38 | 0.58 | 0.58 mg/l |
| 2 Oct 2023, 09:37 | 0.14 | 0.14 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
26 mg/l
Sampled 1 Sep 2026, 30 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 26 | 26 mg/l |
| 12 Aug 2026, 08:44 | 28 | 28 mg/l |
| 24 Jul 2026, 10:17 | 29 | 29 mg/l |
| 12 Jun 2026, 11:26 | 17.9 | 17.9 mg/l |
| 18 May 2026, 11:38 | 25.9 | 25.9 mg/l |
| 23 Apr 2026, 11:27 | 24.8 | 24.8 mg/l |
| 23 Mar 2026, 10:59 | 18.8 | 18.8 mg/l |
| 4 Feb 2026, 09:33 | 8.26 | 8.26 mg/l |
| 16 Jan 2026, 09:32 | 9.36 | 9.36 mg/l |
| 4 Dec 2025, 11:01 | 15.8 | 15.8 mg/l |
| 13 Nov 2025, 13:15 | 18.9 | 18.9 mg/l |
| 23 Oct 2025, 10:32 | 8.55 | 8.55 mg/l |
| 2 Sep 2025, 12:03 | 21.9 | 21.9 mg/l |
| 18 Aug 2025, 13:51 | 26 | 26 mg/l |
| 4 Jul 2025, 14:14 | 26 | 26 mg/l |
| 6 Jun 2025, 08:50 | 23 | 23 mg/l |
| 23 May 2025, 10:49 | 29.9 | 29.9 mg/l |
| 24 Apr 2025, 13:46 | 14.9 | 14.9 mg/l |
| 19 Mar 2025, 10:05 | 19.8 | 19.8 mg/l |
| 6 Feb 2025, 09:55 | 16.8 | 16.8 mg/l |
| 15 Jan 2025, 11:05 | 16.9 | 16.9 mg/l |
| 3 Dec 2024, 08:40 | 12.9 | 12.9 mg/l |
| 5 Nov 2024, 11:40 | 22.9 | 22.9 mg/l |
| 7 Oct 2024, 13:14 | 17.9 | 17.9 mg/l |
| 12 Sep 2024, 12:12 | 21.9 | 21.9 mg/l |
| 2 Aug 2024, 12:10 | 28 | 28 mg/l |
| 3 Jul 2024, 11:34 | 24.9 | 24.9 mg/l |
| 7 Jun 2024, 09:34 | 24.9 | 24.9 mg/l |
| 11 Mar 2024, 09:37 | 8.14 | 8.14 mg/l |
| 3 Jan 2024, 12:02 | 5.67 | 5.67 mg/l |
| 14 Dec 2023, 11:28 | 7.56 | 7.56 mg/l |
| 13 Nov 2023, 11:38 | 4.66 | 4.66 mg/l |
| 2 Oct 2023, 09:37 | 21.9 | 21.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.32 mg/l
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 0.32 | 0.32 mg/l |
| 12 Aug 2026, 08:44 | 0.52 | 0.52 mg/l |
| 24 Jul 2026, 10:17 | 0.35 | 0.35 mg/l |
| 12 Jun 2026, 11:26 | 0.34 | 0.34 mg/l |
| 18 May 2026, 11:38 | 0.86 | 0.86 mg/l |
| 23 Apr 2026, 11:27 | 0.38 | 0.38 mg/l |
| 23 Mar 2026, 10:59 | 0.32 | 0.32 mg/l |
| 4 Feb 2026, 09:33 | 0.16 | 0.16 mg/l |
| 16 Jan 2026, 09:32 | 0.17 | 0.17 mg/l |
| 4 Dec 2025, 11:01 | 0.29 | 0.29 mg/l |
| 13 Nov 2025, 13:15 | 0.5 | 0.5 mg/l |
| 23 Oct 2025, 10:32 | 0.35 | 0.35 mg/l |
| 2 Sep 2025, 12:03 | 0.43 | 0.43 mg/l |
| 18 Aug 2025, 13:51 | 0.46 | 0.46 mg/l |
| 4 Jul 2025, 14:14 | 0.48 | 0.48 mg/l |
| 6 Jun 2025, 08:50 | 0.49 | 0.49 mg/l |
| 23 May 2025, 10:49 | 0.91 | 0.91 mg/l |
| 24 Apr 2025, 13:46 | 0.48 | 0.48 mg/l |
| 19 Mar 2025, 10:05 | 2.6 | 2.6 mg/l |
| 6 Feb 2025, 09:55 | 0.65 | 0.65 mg/l |
| 15 Jan 2025, 11:05 | 0.47 | 0.47 mg/l |
| 3 Dec 2024, 08:40 | 1.1 | 1.1 mg/l |
| 5 Nov 2024, 11:40 | 0.78 | 0.78 mg/l |
| 7 Oct 2024, 13:14 | 1 | 1 mg/l |
| 12 Sep 2024, 12:12 | 0.88 | 0.88 mg/l |
| 2 Aug 2024, 12:10 | 1 | 1 mg/l |
| 3 Jul 2024, 11:34 | 1.2 | 1.2 mg/l |
| 7 Jun 2024, 09:34 | 1.5 | 1.5 mg/l |
| 11 Mar 2024, 09:37 | 0.18 | 0.18 mg/l |
| 6 Feb 2024, 14:54 | 0.46 | 0.46 mg/l |
| 3 Jan 2024, 12:02 | 0.15 | 0.15 mg/l |
| 14 Dec 2023, 11:28 | 0.16 | 0.16 mg/l |
| 13 Nov 2023, 11:38 | 0.23 | 0.23 mg/l |
| 2 Oct 2023, 09:37 | 0.98 | 0.98 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1022 µS/cm
Sampled 1 Sep 2026, 30 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:39 | 1022 | 1022 µS/cm |
| 12 Aug 2026, 08:44 | 1070 | 1070 µS/cm |
| 24 Jul 2026, 10:17 | 1094 | 1094 µS/cm |
| 12 Jun 2026, 11:26 | 874 | 874 µS/cm |
| 18 May 2026, 11:38 | 1079 | 1079 µS/cm |
| 23 Apr 2026, 11:27 | 1174 | 1174 µS/cm |
| 23 Mar 2026, 10:59 | 1035 | 1035 µS/cm |
| 4 Feb 2026, 09:33 | 697 | 697 µS/cm |
| 16 Jan 2026, 09:32 | 717 | 717 µS/cm |
| 4 Dec 2025, 11:01 | 944 | 944 µS/cm |
| 13 Nov 2025, 13:15 | 1003 | 1003 µS/cm |
| 23 Oct 2025, 10:32 | 618 | 618 µS/cm |
| 2 Sep 2025, 12:03 | 891 | 891 µS/cm |
| 18 Aug 2025, 13:51 | 1046 | 1046 µS/cm |
| 4 Jul 2025, 14:14 | 1062 | 1062 µS/cm |
| 6 Jun 2025, 08:50 | 968 | 968 µS/cm |
| 23 May 2025, 10:49 | 1109 | 1109 µS/cm |
| 24 Apr 2025, 13:46 | 959 | 959 µS/cm |
| 19 Mar 2025, 10:05 | 1015 | 1015 µS/cm |
| 6 Feb 2025, 09:55 | 979 | 979 µS/cm |
| 15 Jan 2025, 11:05 | 996 | 996 µS/cm |
| 3 Dec 2024, 08:40 | 823 | 823 µS/cm |
| 5 Nov 2024, 11:40 | 986 | 986 µS/cm |
| 7 Oct 2024, 13:14 | 930 | 930 µS/cm |
| 12 Sep 2024, 12:12 | 840 | 840 µS/cm |
| 2 Aug 2024, 12:10 | 1005 | 1005 µS/cm |
| 3 Jul 2024, 11:34 | 1009 | 1009 µS/cm |
| 7 Jun 2024, 09:34 | 1021 | 1021 µS/cm |
| 11 Mar 2024, 09:37 | 760 | 760 µS/cm |
| 6 Feb 2024, 14:54 | 992 | 992 µS/cm |
| 3 Jan 2024, 12:02 | 614 | 614 µS/cm |
| 14 Dec 2023, 11:28 | 710 | 710 µS/cm |
| 13 Nov 2023, 11:38 | 491 | 491 µS/cm |
| 2 Oct 2023, 09:37 | 1047 | 1047 µS/cm |
Everything measured here
75 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 75 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 34 | Oct 2023 – Sep 2026 | 91.3% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 34 | Oct 2023 – Sep 2026 | 8.33 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 34 | Oct 2023 – Sep 2026 | 19.7 °C 1 Sep 2026 |
| pH 0061 | River water | 34 | Oct 2023 – Sep 2026 | 7.18 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 34 | Oct 2023 – Sep 2026 | 0.082 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Sep 2026 | 26 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 34 | Oct 2023 – Sep 2026 | 0.32 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 34 | Oct 2023 – Sep 2026 | 1022 µS/cm 1 Sep 2026 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 4 Feb 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 4 Feb 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 4 Feb 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Feb 2026 – Feb 2026 | 0.0025 µg/l 4 Feb 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 4 Feb 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 4 Feb 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 4 Feb 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 4 Feb 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 4 Feb 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 34 | Oct 2023 – Sep 2026 | 33 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 34 | Oct 2023 – Sep 2026 | 0.00047 mg/l 1 Sep 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 4 Feb 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 4 Feb 2026 |
| Nitrite as N 0118 | River water | 34 | Oct 2023 – Sep 2026 | 0.042 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Sep 2026 | 26 mg/l 1 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Feb 2026 – Feb 2026 | 0.0057 µg/l 4 Feb 2026 |
| Perfluorobutanoic acid 2995 | River water | 1 | Feb 2026 – Feb 2026 | 0.0041 µg/l 4 Feb 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Feb 2026 – Feb 2026 | 0.00081 µg/l 4 Feb 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| Perfluorodecanoic acid 8892 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Feb 2026 – Feb 2026 | below 0.005 µg/l 4 Feb 2026 |
| Perfluorododecanoic acid 8894 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 4 Feb 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Feb 2026 – Feb 2026 | 0.003 µg/l 4 Feb 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Feb 2026 – Feb 2026 | 0.00085 µg/l 4 Feb 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Feb 2026 – Feb 2026 | 0.0033 µg/l 4 Feb 2026 |
| Perfluorohexanoic acid 8888 | River water | 1 | Feb 2026 – Feb 2026 | 0.0049 µg/l 4 Feb 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 4 Feb 2026 |
| Perfluorononanoic acid 8891 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 4 Feb 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Feb 2026 – Feb 2026 | 0.0025 µg/l 4 Feb 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Feb 2026 – Feb 2026 | 0.0019 µg/l 4 Feb 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Feb 2026 – Feb 2026 | 0.0044 µg/l 4 Feb 2026 |
| Perfluorooctanoic acid 8890 | River water | 1 | Feb 2026 – Feb 2026 | 0.0042 µg/l 4 Feb 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Feb 2026 – Feb 2026 | 0.00073 µg/l 4 Feb 2026 |
| Perfluoropentanoic acid 8887 | River water | 1 | Feb 2026 – Feb 2026 | 0.0053 µg/l 4 Feb 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Feb 2026 – Feb 2026 | below 0.006 µg/l 4 Feb 2026 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 4 Feb 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 4 Feb 2026 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 4 Feb 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.