East Haddon Arm at downstream of Railway
EA name: EAST HADDON ARM AT D/S RAILWAY (also listed as “RSN1790 EAST HADDON ARM (WHILTON BRANCH) AT D/S RAILWAY”)
Environment Agency sampling point AN-RSN1790 · 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
- 2 Sep 2026, 12:0329 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 29 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 Monitoring (national agency policy)
- Where
- National Grid 464582, 266142As published, to the nearest 1 m. Open in a map
- River, by its own name
- East Haddon Arm
- River, by the map
- Not placedNearest line is 342 m away and its name does not agree. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
64.2%
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 64.2 | 64.2% |
| 13 Aug 2026, 09:59 | 78.7 | 78.7% |
| 3 Jul 2026, 09:46 | 72.1 | 72.1% |
| 3 Jun 2026, 11:45 | 83.2 | 83.2% |
| 29 May 2026, 09:37 | 80.1 | 80.1% |
| 7 May 2026, 13:10 | 94.5 | 94.5% |
| 3 Jun 2025, 12:01 | 83.6 | 83.6% |
| 9 May 2025, 09:49 | 93.8 | 93.8% |
| 22 Apr 2025, 10:49 | 93 | 93% |
| 31 Mar 2025, 12:49 | 105.5 | 105.5% |
| 14 Mar 2025, 12:31 | 101.8 | 101.8% |
| 27 Feb 2025, 13:29 | 92.2 | 92.2% |
| 9 Dec 2024, 10:07 | 96.3 | 96.3% |
| 25 Nov 2024, 10:54 | 92.9 | 92.9% |
| 15 Oct 2024, 14:11 | 98.1 | 98.1% |
| 27 Sep 2024, 11:00 | 90.1 | 90.1% |
| 19 Aug 2024, 13:09 | 88.4 | 88.4% |
| 15 Jul 2024, 12:06 | 95.1 | 95.1% |
| 27 Jun 2024, 10:45 | 92.9 | 92.9% |
| 17 May 2024, 13:14 | 100.1 | 100.1% |
| 9 Apr 2024, 13:46 | 91.6 | 91.6% |
| 8 Mar 2024, 10:57 | 99.9 | 99.9% |
| 1 Feb 2024, 11:18 | 98.7 | 98.7% |
| 15 Jan 2024, 13:12 | 98.7 | 98.7% |
| 12 Dec 2023, 13:53 | 93.9 | 93.9% |
| 2 Nov 2023, 14:28 | 91.9 | 91.9% |
| 4 Oct 2023, 13:01 | 83.3 | 83.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.28 mg/l
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 6.28 | 6.28 mg/l |
| 13 Aug 2026, 09:59 | 7.52 | 7.52 mg/l |
| 3 Jul 2026, 09:46 | 7.35 | 7.35 mg/l |
| 3 Jun 2026, 11:45 | 8.63 | 8.63 mg/l |
| 29 May 2026, 09:37 | 7.94 | 7.94 mg/l |
| 7 May 2026, 13:10 | 10.6 | 10.6 mg/l |
| 3 Jun 2025, 12:01 | 8.9 | 8.9 mg/l |
| 9 May 2025, 09:49 | 11 | 11 mg/l |
| 22 Apr 2025, 10:49 | 10.8 | 10.8 mg/l |
| 31 Mar 2025, 12:49 | 12.2 | 12.2 mg/l |
| 14 Mar 2025, 12:31 | 12.8 | 12.8 mg/l |
| 27 Feb 2025, 13:29 | 11.2 | 11.2 mg/l |
| 9 Dec 2024, 10:07 | 11.7 | 11.7 mg/l |
| 25 Nov 2024, 10:54 | 10.7 | 10.7 mg/l |
| 15 Oct 2024, 14:11 | 10.7 | 10.7 mg/l |
| 27 Sep 2024, 11:00 | 9.51 | 9.51 mg/l |
| 19 Aug 2024, 13:09 | 9.08 | 9.08 mg/l |
| 15 Jul 2024, 12:06 | 9.88 | 9.88 mg/l |
| 27 Jun 2024, 10:45 | 9.04 | 9.04 mg/l |
| 17 May 2024, 13:14 | 10.3 | 10.3 mg/l |
| 9 Apr 2024, 13:46 | 10.5 | 10.5 mg/l |
| 8 Mar 2024, 10:57 | 12.4 | 12.4 mg/l |
| 1 Feb 2024, 11:18 | 12.6 | 12.6 mg/l |
| 15 Jan 2024, 13:12 | 13.3 | 13.3 mg/l |
| 12 Dec 2023, 13:53 | 11.2 | 11.2 mg/l |
| 2 Nov 2023, 14:28 | 10.1 | 10.1 mg/l |
| 4 Oct 2023, 13:01 | 8.79 | 8.79 mg/l |
Water temperature
code 0076 · °C
16.3 °C
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 16.3 | 16.3 °C |
| 13 Aug 2026, 09:59 | 17.4 | 17.4 °C |
| 3 Jul 2026, 09:46 | 14.4 | 14.4 °C |
| 3 Jun 2026, 11:45 | 13.6 | 13.6 °C |
| 29 May 2026, 09:37 | 15.7 | 15.7 °C |
| 7 May 2026, 13:10 | 10.3 | 10.3 °C |
| 3 Jun 2025, 12:01 | 12.4 | 12.4 °C |
| 9 May 2025, 09:49 | 8.4 | 8.4 °C |
| 22 Apr 2025, 10:49 | 8.7 | 8.7 °C |
| 31 Mar 2025, 12:49 | 9 | 9 °C |
| 14 Mar 2025, 12:31 | 5.6 | 5.6 °C |
| 27 Feb 2025, 13:29 | 6.9 | 6.9 °C |
| 9 Dec 2024, 10:07 | 7 | 7 °C |
| 25 Nov 2024, 10:54 | 9.1 | 9.1 °C |
| 15 Oct 2024, 14:11 | 11.5 | 11.5 °C |
| 27 Sep 2024, 11:00 | 12.8 | 12.8 °C |
| 19 Aug 2024, 13:09 | 14 | 14 °C |
| 15 Jul 2024, 12:06 | 13.5 | 13.5 °C |
| 27 Jun 2024, 10:45 | 16.5 | 16.5 °C |
| 17 May 2024, 13:14 | 14 | 14 °C |
| 9 Apr 2024, 13:46 | 9.4 | 9.4 °C |
| 8 Mar 2024, 10:57 | 6.1 | 6.1 °C |
| 1 Feb 2024, 11:18 | 5 | 5 °C |
| 15 Jan 2024, 13:12 | 2.8 | 2.8 °C |
| 12 Dec 2023, 13:53 | 7.7 | 7.7 °C |
| 2 Nov 2023, 14:28 | 10.9 | 10.9 °C |
| 4 Oct 2023, 13:01 | 12.8 | 12.8 °C |
pH
code 0061
7.42
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 7.42 | 7.42 |
| 13 Aug 2026, 09:59 | 7.71 | 7.71 |
| 3 Jul 2026, 09:46 | 7.57 | 7.57 |
| 3 Jun 2026, 11:45 | 7.84 | 7.84 |
| 29 May 2026, 09:37 | 7.7 | 7.7 |
| 7 May 2026, 13:10 | 7.84 | 7.84 |
| 3 Jun 2025, 12:01 | 7.64 | 7.64 |
| 9 May 2025, 09:49 | 7.96 | 7.96 |
| 22 Apr 2025, 10:49 | 7.9 | 7.9 |
| 31 Mar 2025, 12:49 | 8.1 | 8.1 |
| 14 Mar 2025, 12:31 | 8.24 | 8.24 |
| 27 Feb 2025, 13:29 | 7.99 | 7.99 |
| 9 Dec 2024, 10:07 | 7.76 | 7.76 |
| 25 Nov 2024, 10:54 | 7.46 | 7.46 |
| 15 Oct 2024, 14:11 | 7.9 | 7.9 |
| 27 Sep 2024, 11:00 | 7.3 | 7.3 |
| 19 Aug 2024, 13:09 | 7.72 | 7.72 |
| 15 Jul 2024, 12:06 | 7.91 | 7.91 |
| 27 Jun 2024, 10:45 | 7.96 | 7.96 |
| 17 May 2024, 13:14 | 8.05 | 8.05 |
| 9 Apr 2024, 13:46 | 7.97 | 7.97 |
| 8 Mar 2024, 10:57 | 8.09 | 8.09 |
| 1 Feb 2024, 11:18 | 8.21 | 8.21 |
| 15 Jan 2024, 13:12 | 8.05 | 8.05 |
| 12 Dec 2023, 13:53 | 7.44 | 7.44 |
| 2 Nov 2023, 14:28 | 7.81 | 7.81 |
| 4 Oct 2023, 13:01 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.032 mg/l
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 0.032 | 0.032 mg/l |
| 13 Aug 2026, 09:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2026, 09:46 | 0.04 | 0.04 mg/l |
| 3 Jun 2026, 11:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2026, 09:37 | 0.071 | 0.071 mg/l |
| 7 May 2026, 13:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2025, 12:01 | 0.15 | 0.15 mg/l |
| 9 May 2025, 09:49 | 0.023 | 0.023 mg/l |
| 22 Apr 2025, 10:49 | 0.22 | 0.22 mg/l |
| 31 Mar 2025, 12:49 | 0.013 | 0.013 mg/l |
| 14 Mar 2025, 12:31 | 0.16 | 0.16 mg/l |
| 27 Feb 2025, 13:29 | 0.028 | 0.028 mg/l |
| 9 Dec 2024, 10:07 | 0.013 | 0.013 mg/l |
| 25 Nov 2024, 10:54 | 0.056 | 0.056 mg/l |
| 15 Oct 2024, 14:11 | 0.0048 | 0.0048 mg/l |
| 27 Sep 2024, 11:00 | 0.037 | 0.037 mg/l |
| 19 Aug 2024, 13:09 | 0.075 | 0.075 mg/l |
| 15 Jul 2024, 12:06 | 0.03 | 0.03 mg/l |
| 27 Jun 2024, 10:45 | 0.021 | 0.021 mg/l |
| 17 May 2024, 13:14 | 0.046 | 0.046 mg/l |
| 9 Apr 2024, 13:46 | 0.15 | 0.15 mg/l |
| 8 Mar 2024, 10:57 | 0.04 | 0.04 mg/l |
| 1 Feb 2024, 11:18 | 0.048 | 0.048 mg/l |
| 15 Jan 2024, 13:12 | 0.058 | 0.058 mg/l |
| 12 Dec 2023, 13:53 | 0.016 | 0.016 mg/l |
| 2 Nov 2023, 14:28 | 0.065 | 0.065 mg/l |
| 4 Oct 2023, 13:01 | 0.037 | 0.037 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.29 mg/l
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 1.29 | 1.29 mg/l |
| 13 Aug 2026, 09:59 | 0.721 | 0.721 mg/l |
| 3 Jul 2026, 09:46 | 6.78 | 6.78 mg/l |
| 3 Jun 2026, 11:45 | 7.26 | 7.26 mg/l |
| 29 May 2026, 09:37 | 11.8 | 11.8 mg/l |
| 7 May 2026, 13:10 | 11 | 11 mg/l |
| 3 Jun 2025, 12:01 | 10.9 | 10.9 mg/l |
| 9 May 2025, 09:49 | 12 | 12 mg/l |
| 22 Apr 2025, 10:49 | 10.9 | 10.9 mg/l |
| 31 Mar 2025, 12:49 | 9.98 | 9.98 mg/l |
| 14 Mar 2025, 12:31 | 11.9 | 11.9 mg/l |
| 27 Feb 2025, 13:29 | 5.29 | 5.29 mg/l |
| 9 Dec 2024, 10:07 | 5.39 | 5.39 mg/l |
| 25 Nov 2024, 10:54 | 5.39 | 5.39 mg/l |
| 15 Oct 2024, 14:11 | 8.89 | 8.89 mg/l |
| 27 Sep 2024, 11:00 | 5.59 | 5.59 mg/l |
| 19 Aug 2024, 13:09 | 11 | 11 mg/l |
| 15 Jul 2024, 12:06 | 9.68 | 9.68 mg/l |
| 27 Jun 2024, 10:45 | 10.9 | 10.9 mg/l |
| 17 May 2024, 13:14 | 9.23 | 9.23 mg/l |
| 9 Apr 2024, 13:46 | 6.9 | 6.9 mg/l |
| 8 Mar 2024, 10:57 | 11 | 11 mg/l |
| 1 Feb 2024, 11:18 | 11 | 11 mg/l |
| 15 Jan 2024, 13:12 | 14 | 14 mg/l |
| 12 Dec 2023, 13:53 | 3.69 | 3.69 mg/l |
| 2 Nov 2023, 14:28 | 6.68 | 6.68 mg/l |
| 4 Oct 2023, 13:01 | 3.79 | 3.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.89 mg/l
Sampled 2 Sep 2026, 29 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 0.89 | 0.89 mg/l |
| 3 Jul 2026, 09:46 | 0.092 | 0.092 mg/l |
| 3 Jun 2026, 11:45 | 0.1 | 0.1 mg/l |
| 29 May 2026, 09:37 | 0.097 | 0.097 mg/l |
| 7 May 2026, 13:10 | 0.058 | 0.058 mg/l |
| 3 Jun 2025, 12:01 | 0.19 | 0.19 mg/l |
| 9 May 2025, 09:49 | 0.14 | 0.14 mg/l |
| 22 Apr 2025, 10:49 | 0.083 | 0.083 mg/l |
| 31 Mar 2025, 12:49 | 0.052 | 0.052 mg/l |
| 14 Mar 2025, 12:31 | 0.05 | 0.05 mg/l |
| 27 Feb 2025, 13:29 | 0.087 | 0.087 mg/l |
| 9 Dec 2024, 10:07 | 0.044 | 0.044 mg/l |
| 25 Nov 2024, 10:54 | 0.089 | 0.089 mg/l |
| 15 Oct 2024, 14:11 | 0.045 | 0.045 mg/l |
| 27 Sep 2024, 11:00 | 0.12 | 0.12 mg/l |
| 19 Aug 2024, 13:09 | 0.085 | 0.085 mg/l |
| 15 Jul 2024, 12:06 | 0.12 | 0.12 mg/l |
| 27 Jun 2024, 10:45 | 0.18 | 0.18 mg/l |
| 17 May 2024, 13:14 | 0.089 | 0.089 mg/l |
| 9 Apr 2024, 13:46 | 0.053 | 0.053 mg/l |
| 8 Mar 2024, 10:57 | 0.028 | 0.028 mg/l |
| 1 Feb 2024, 11:18 | 0.037 | 0.037 mg/l |
| 15 Jan 2024, 13:12 | 0.032 | 0.032 mg/l |
| 12 Dec 2023, 13:53 | 0.041 | 0.041 mg/l |
| 2 Nov 2023, 14:28 | 0.057 | 0.057 mg/l |
| 4 Oct 2023, 13:01 | 0.11 | 0.11 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
492 µS/cm
Sampled 2 Sep 2026, 29 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 12:03 | 492 | 492 µS/cm |
| 13 Aug 2026, 09:59 | 393 | 393 µS/cm |
| 3 Jul 2026, 09:46 | 470 | 470 µS/cm |
| 3 Jun 2026, 11:45 | 496 | 496 µS/cm |
| 29 May 2026, 09:37 | 469 | 469 µS/cm |
| 7 May 2026, 13:10 | 484 | 484 µS/cm |
| 3 Jun 2025, 12:01 | 498 | 498 µS/cm |
| 9 May 2025, 09:49 | 517 | 517 µS/cm |
| 22 Apr 2025, 10:49 | 521 | 521 µS/cm |
| 31 Mar 2025, 12:49 | 532 | 532 µS/cm |
| 14 Mar 2025, 12:31 | 585 | 585 µS/cm |
| 27 Feb 2025, 13:29 | 430 | 430 µS/cm |
| 9 Dec 2024, 10:07 | 354 | 354 µS/cm |
| 25 Nov 2024, 10:54 | 324 | 324 µS/cm |
| 15 Oct 2024, 14:11 | 461 | 461 µS/cm |
| 27 Sep 2024, 11:00 | 301 | 301 µS/cm |
| 19 Aug 2024, 13:09 | 506 | 506 µS/cm |
| 15 Jul 2024, 12:06 | 521 | 521 µS/cm |
| 27 Jun 2024, 10:45 | 524 | 524 µS/cm |
| 17 May 2024, 13:14 | 511 | 511 µS/cm |
| 9 Apr 2024, 13:46 | 474 | 474 µS/cm |
| 8 Mar 2024, 10:57 | 496 | 496 µS/cm |
| 1 Feb 2024, 11:18 | 525 | 525 µS/cm |
| 15 Jan 2024, 13:12 | 496 | 496 µS/cm |
| 12 Dec 2023, 13:53 | 337 | 337 µS/cm |
| 2 Nov 2023, 14:28 | 408 | 408 µS/cm |
| 4 Oct 2023, 13:01 | 540 | 540 µS/cm |
Everything measured here
66 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 66 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 27 | Oct 2023 – Sep 2026 | 64.2% 2 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Oct 2023 – Sep 2026 | 6.28 mg/l 2 Sep 2026 |
| Temperature of Water 0076 | River water | 27 | Oct 2023 – Sep 2026 | 16.3 °C 2 Sep 2026 |
| pH 0061 | River water | 27 | Oct 2023 – Sep 2026 | 7.42 2 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Oct 2023 – Sep 2026 | 0.032 mg/l 2 Sep 2026 |
| Nitrate as N 0117 | River water | 27 | Oct 2023 – Sep 2026 | 1.29 mg/l 2 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Oct 2023 – Sep 2026 | 0.89 mg/l 2 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Oct 2023 – Sep 2026 | 492 µS/cm 2 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jul 2024 – Sep 2024 | below 0.004 µg/l 27 Sep 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jul 2024 – Sep 2024 | below 0.005 µg/l 27 Sep 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Oct 2023 – Sep 2026 | 77 mg/l 2 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Oct 2023 – Sep 2026 | 0.00025 mg/l 2 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Jun 2024 – Sep 2026 | below 3 mg/l 2 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 21 | Oct 2023 – Jun 2025 | 4.1 mg/l 3 Jun 2025 |
| Chloride 0172 | River water | 21 | Oct 2023 – Jun 2025 | 44 mg/l 3 Jun 2025 |
| Flow Type 2896 | River water | 12 | Jul 2024 – Jun 2025 | Moderate Flow 3 Jun 2025 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| Nitrite as N 0118 | River water | 27 | Oct 2023 – Sep 2026 | 0.0085 mg/l 2 Sep 2026 |
| Nitrogen, Total as N 9686 | River water | 21 | Oct 2023 – Jun 2025 | 12 mg/l 3 Jun 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Oct 2023 – Sep 2026 | 1.3 mg/l 2 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jul 2024 – Sep 2024 | 0.0057 µg/l 27 Sep 2024 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jul 2024 – Sep 2024 | 0.0034 µg/l 27 Sep 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jul 2024 – Sep 2024 | below 0.005 µg/l 27 Sep 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jul 2024 – Sep 2024 | 0.002 µg/l 27 Sep 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jul 2024 – Sep 2024 | 0.00072 µg/l 27 Sep 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jul 2024 – Sep 2024 | 0.0037 µg/l 27 Sep 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluorononanoic acid 8891 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jul 2024 – Sep 2024 | below 0.001 µg/l 27 Sep 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jul 2024 – Sep 2024 | 0.0011 µg/l 27 Sep 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jul 2024 – Sep 2024 | 0.00063 µg/l 27 Sep 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jul 2024 – Sep 2024 | 0.0017 µg/l 27 Sep 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jul 2024 – Sep 2024 | below 0.0005 µg/l 27 Sep 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jul 2024 – Sep 2024 | 0.0014 µg/l 27 Sep 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jul 2024 – Sep 2024 | below 0.006 µg/l 27 Sep 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jul 2024 – Sep 2024 | below 0.005 µg/l 27 Sep 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jul 2024 – Sep 2024 | below 0.004 µg/l 27 Sep 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jul 2024 – Sep 2024 | below 0.002 µg/l 27 Sep 2024 |
| Phosphorus, Total as P 0348 | River water | 21 | Oct 2023 – Jun 2025 | 0.22 mg/l 3 Jun 2025 |
| Silica, reactive as SiO2 0182 | River water | 21 | Oct 2023 – Jun 2025 | 8.3 mg/l 3 Jun 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.