River Salwarpe at Harford Hill
EA name: RIVER SALWARPE AT HARFORD HILL (also listed as “RIVER SALWARPE,HARFORD HILL”)
Environment Agency sampling point MD-22241840 · 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
- 20 Aug 2026, 10:3042 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 32 since 16 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 386450, 261850As published, to the nearest 10 m. Open in a map
- River, by its own name
- Salwarpe
- River, by the map
- River SalwarpePlaced on the river its name gives, 21 m from the line.
- Next gauge downstream
- Worcester (Barbourne) On the River Severn · 10 km along the river
- Nearest gauge upstream
- Harford Hill On the River Salwarpe · 1.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (32 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89%
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 89 | 89% |
| 22 Apr 2026, 11:42 | 111.1 | 111.1% |
| 6 Mar 2026, 14:02 | 95.7 | 95.7% |
| 11 Feb 2026, 10:46 | 96.8 | 96.8% |
| 27 Jan 2026, 13:33 | 92.5 | 92.5% |
| 16 Dec 2025, 12:56 | 91.2 | 91.2% |
| 12 Dec 2025, 14:37 | 91.9 | 91.9% |
| 26 Nov 2025, 12:04 | 95 | 95% |
| 20 Oct 2025, 10:00 | 84.8 | 84.8% |
| 24 Sep 2025, 11:54 | 94.5 | 94.5% |
| 20 Aug 2025, 14:56 | 98.8 | 98.8% |
| 8 Apr 2025, 14:39 | 127.9 | 127.9% |
| 4 Mar 2025, 13:21 | 101.2 | 101.2% |
| 12 Feb 2025, 10:52 | 97.6 | 97.6% |
| 22 Jan 2025, 13:12 | 97.4 | 97.4% |
| 3 Dec 2024, 11:36 | 93.2 | 93.2% |
| 18 Nov 2024, 10:22 | 93.7 | 93.7% |
| 15 Oct 2024, 10:10 | 92.9 | 92.9% |
| 23 Sep 2024, 10:54 | 87.3 | 87.3% |
| 28 Aug 2024, 07:27 | 85.8 | 85.8% |
| 22 May 2024, 09:34 | 89.5 | 89.5% |
| 18 Apr 2024, 09:32 | 95.5 | 95.5% |
| 18 Mar 2024, 12:41 | 97.4 | 97.4% |
| 19 Feb 2024, 13:01 | 96.1 | 96.1% |
| 24 Jan 2024, 14:05 | 97.6 | 97.6% |
| 7 Dec 2023, 13:35 | 95.2 | 95.2% |
| 20 Nov 2023, 13:26 | 94.6 | 94.6% |
| 16 Oct 2023, 11:13 | 92.2 | 92.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.35 mg/l
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 8.35 | 8.35 mg/l |
| 22 Apr 2026, 11:42 | 12.3 | 12.3 mg/l |
| 6 Mar 2026, 14:02 | 11 | 11 mg/l |
| 11 Feb 2026, 10:46 | 11.2 | 11.2 mg/l |
| 27 Jan 2026, 13:33 | 11.2 | 11.2 mg/l |
| 16 Dec 2025, 12:56 | 10.5 | 10.5 mg/l |
| 12 Dec 2025, 14:37 | 10.4 | 10.4 mg/l |
| 26 Nov 2025, 12:04 | 11.9 | 11.9 mg/l |
| 20 Oct 2025, 10:00 | 8.85 | 8.85 mg/l |
| 24 Sep 2025, 11:54 | 10.2 | 10.2 mg/l |
| 20 Aug 2025, 14:56 | 9.73 | 9.73 mg/l |
| 8 Apr 2025, 14:39 | 13.8 | 13.8 mg/l |
| 4 Mar 2025, 13:21 | 11.9 | 11.9 mg/l |
| 12 Feb 2025, 10:52 | 12.1 | 12.1 mg/l |
| 22 Jan 2025, 13:12 | 12.1 | 12.1 mg/l |
| 3 Dec 2024, 11:36 | 10.9 | 10.9 mg/l |
| 18 Nov 2024, 10:22 | 10.8 | 10.8 mg/l |
| 15 Oct 2024, 10:10 | 10.2 | 10.2 mg/l |
| 23 Sep 2024, 10:54 | 8.76 | 8.76 mg/l |
| 28 Aug 2024, 07:27 | 8.56 | 8.56 mg/l |
| 22 May 2024, 09:34 | 9.22 | 9.22 mg/l |
| 18 Apr 2024, 09:32 | 11.2 | 11.2 mg/l |
| 18 Mar 2024, 12:41 | 10.8 | 10.8 mg/l |
| 19 Feb 2024, 13:01 | 10.8 | 10.8 mg/l |
| 24 Jan 2024, 14:05 | 11.4 | 11.4 mg/l |
| 7 Dec 2023, 13:35 | 11.6 | 11.6 mg/l |
| 20 Nov 2023, 13:26 | 10.5 | 10.5 mg/l |
| 16 Oct 2023, 11:13 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
18.3 °C
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 18.3 | 18.3 °C |
| 22 Apr 2026, 11:42 | 10.7 | 10.7 °C |
| 6 Mar 2026, 14:02 | 9 | 9 °C |
| 11 Feb 2026, 10:46 | 9 | 9 °C |
| 27 Jan 2026, 13:33 | 7.1 | 7.1 °C |
| 16 Dec 2025, 12:56 | 9.2 | 9.2 °C |
| 12 Dec 2025, 14:37 | 9.8 | 9.8 °C |
| 26 Nov 2025, 12:04 | 5.8 | 5.8 °C |
| 20 Oct 2025, 10:00 | 13.3 | 13.3 °C |
| 24 Sep 2025, 11:54 | 11.7 | 11.7 °C |
| 20 Aug 2025, 14:56 | 16 | 16 °C |
| 8 Apr 2025, 14:39 | 12 | 12 °C |
| 4 Mar 2025, 13:21 | 8.2 | 8.2 °C |
| 12 Feb 2025, 10:52 | 6 | 6 °C |
| 22 Jan 2025, 13:12 | 6 | 6 °C |
| 3 Dec 2024, 11:36 | 8.4 | 8.4 °C |
| 18 Nov 2024, 10:22 | 8.9 | 8.9 °C |
| 15 Oct 2024, 10:10 | 11.2 | 11.2 °C |
| 23 Sep 2024, 10:54 | 15.1 | 15.1 °C |
| 28 Aug 2024, 07:27 | 15.4 | 15.4 °C |
| 22 May 2024, 09:34 | 13.9 | 13.9 °C |
| 18 Apr 2024, 09:32 | 8.5 | 8.5 °C |
| 18 Mar 2024, 12:41 | 10.5 | 10.5 °C |
| 19 Feb 2024, 13:01 | 10.2 | 10.2 °C |
| 24 Jan 2024, 14:05 | 8.5 | 8.5 °C |
| 7 Dec 2023, 13:35 | 6.8 | 6.8 °C |
| 20 Nov 2023, 13:26 | 10.7 | 10.7 °C |
| 16 Oct 2023, 11:13 | 9.2 | 9.2 °C |
pH
code 0061
7.91
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 7.91 | 7.91 |
| 22 Apr 2026, 11:42 | 8.21 | 8.21 |
| 6 Mar 2026, 14:02 | 8.12 | 8.12 |
| 11 Feb 2026, 10:46 | 7.91 | 7.91 |
| 27 Jan 2026, 13:33 | 7.77 | 7.77 |
| 16 Dec 2025, 12:56 | 7.93 | 7.93 |
| 12 Dec 2025, 14:37 | 8.04 | 8.04 |
| 26 Nov 2025, 12:04 | 7.93 | 7.93 |
| 20 Oct 2025, 10:00 | 7.73 | 7.73 |
| 24 Sep 2025, 11:54 | 8.11 | 8.11 |
| 20 Aug 2025, 14:56 | 8.07 | 8.07 |
| 8 Apr 2025, 14:39 | 8.41 | 8.41 |
| 4 Mar 2025, 13:21 | 8.17 | 8.17 |
| 12 Feb 2025, 10:52 | 8.18 | 8.18 |
| 22 Jan 2025, 13:12 | 8.15 | 8.15 |
| 3 Dec 2024, 11:36 | 8.05 | 8.05 |
| 18 Nov 2024, 10:22 | 8.13 | 8.13 |
| 15 Oct 2024, 10:10 | 8.06 | 8.06 |
| 23 Sep 2024, 10:54 | 7.84 | 7.84 |
| 28 Aug 2024, 07:27 | 7.98 | 7.98 |
| 22 May 2024, 09:34 | 7.97 | 7.97 |
| 18 Apr 2024, 09:32 | 7.8 | 7.8 |
| 18 Mar 2024, 12:41 | 7.8 | 7.8 |
| 19 Feb 2024, 13:01 | 7.78 | 7.78 |
| 24 Jan 2024, 14:05 | 7.92 | 7.92 |
| 7 Dec 2023, 13:35 | 7.9 | 7.9 |
| 20 Nov 2023, 13:26 | 8.08 | 8.08 |
| 16 Oct 2023, 11:13 | 7.82 | 7.82 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.091 mg/l
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 0.091 | 0.091 mg/l |
| 22 Apr 2026, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2026, 14:02 | 0.05 | 0.05 mg/l |
| 11 Feb 2026, 10:46 | 0.16 | 0.16 mg/l |
| 27 Jan 2026, 13:33 | 0.26 | 0.26 mg/l |
| 16 Dec 2025, 12:56 | 0.06 | 0.06 mg/l |
| 12 Dec 2025, 14:37 | 0.1 | 0.1 mg/l |
| 26 Nov 2025, 12:04 | 0.043 | 0.043 mg/l |
| 20 Oct 2025, 10:00 | 0.56 | 0.56 mg/l |
| 24 Sep 2025, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Aug 2025, 14:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2025, 14:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 13:21 | 0.032 | 0.032 mg/l |
| 12 Feb 2025, 10:52 | 0.27 | 0.27 mg/l |
| 22 Jan 2025, 13:12 | 0.046 | 0.046 mg/l |
| 3 Dec 2024, 11:36 | 0.047 | 0.047 mg/l |
| 18 Nov 2024, 10:22 | 0.033 | 0.033 mg/l |
| 15 Oct 2024, 10:10 | 0.03 | 0.03 mg/l |
| 23 Sep 2024, 10:54 | 0.18 | 0.18 mg/l |
| 28 Aug 2024, 07:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2024, 09:34 | 0.087 | 0.087 mg/l |
| 18 Apr 2024, 09:32 | 0.032 | 0.032 mg/l |
| 18 Mar 2024, 12:41 | 0.083 | 0.083 mg/l |
| 19 Feb 2024, 13:01 | 0.068 | 0.068 mg/l |
| 24 Jan 2024, 14:05 | 0.33 | 0.33 mg/l |
| 7 Dec 2023, 13:35 | 0.26 | 0.26 mg/l |
| 20 Nov 2023, 13:26 | 0.031 | 0.031 mg/l |
| 16 Oct 2023, 11:13 | 0.066 | 0.066 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.15 mg/l
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 7.15 | 7.15 mg/l |
| 22 Apr 2026, 11:42 | 8.08 | 8.08 mg/l |
| 6 Mar 2026, 14:02 | 7.15 | 7.15 mg/l |
| 11 Feb 2026, 10:46 | 5.45 | 5.45 mg/l |
| 27 Jan 2026, 13:33 | 3.37 | 3.37 mg/l |
| 16 Dec 2025, 12:56 | 5.74 | 5.74 mg/l |
| 12 Dec 2025, 14:37 | 6.52 | 6.52 mg/l |
| 26 Nov 2025, 12:04 | 6.6 | 6.6 mg/l |
| 20 Oct 2025, 10:00 | 3.35 | 3.35 mg/l |
| 24 Sep 2025, 11:54 | 7.79 | 7.79 mg/l |
| 20 Aug 2025, 14:56 | 7.29 | 7.29 mg/l |
| 8 Apr 2025, 14:39 | 9.28 | 9.28 mg/l |
| 4 Mar 2025, 13:21 | 8.58 | 8.58 mg/l |
| 12 Feb 2025, 10:52 | 8.27 | 8.27 mg/l |
| 22 Jan 2025, 13:12 | 8.56 | 8.56 mg/l |
| 3 Dec 2024, 11:36 | 6.25 | 6.25 mg/l |
| 18 Nov 2024, 10:22 | 8.58 | 8.58 mg/l |
| 15 Oct 2024, 10:10 | 6.38 | 6.38 mg/l |
| 23 Sep 2024, 10:54 | 3.85 | 3.85 mg/l |
| 28 Aug 2024, 07:27 | 8.58 | 8.58 mg/l |
| 22 May 2024, 09:34 | 5.87 | 5.87 mg/l |
| 18 Apr 2024, 09:32 | 6.27 | 6.27 mg/l |
| 18 Mar 2024, 12:41 | 4.07 | 4.07 mg/l |
| 19 Feb 2024, 13:01 | 4.57 | 4.57 mg/l |
| 24 Jan 2024, 14:05 | 5.74 | 5.74 mg/l |
| 7 Dec 2023, 13:35 | 5.77 | 5.77 mg/l |
| 20 Nov 2023, 13:26 | 6.27 | 6.27 mg/l |
| 16 Oct 2023, 11:13 | 7.88 | 7.88 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.26 mg/l
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 0.26 | 0.26 mg/l |
| 22 Apr 2026, 11:42 | 0.16 | 0.16 mg/l |
| 6 Mar 2026, 14:02 | 0.17 | 0.17 mg/l |
| 11 Feb 2026, 10:46 | 0.2 | 0.2 mg/l |
| 27 Jan 2026, 13:33 | 0.27 | 0.27 mg/l |
| 16 Dec 2025, 12:56 | 0.22 | 0.22 mg/l |
| 12 Dec 2025, 14:37 | 0.17 | 0.17 mg/l |
| 26 Nov 2025, 12:04 | 0.16 | 0.16 mg/l |
| 20 Oct 2025, 10:00 | 0.24 | 0.24 mg/l |
| 24 Sep 2025, 11:54 | 0.2 | 0.2 mg/l |
| 20 Aug 2025, 14:56 | 0.24 | 0.24 mg/l |
| 8 Apr 2025, 14:39 | 0.14 | 0.14 mg/l |
| 4 Mar 2025, 13:21 | 0.14 | 0.14 mg/l |
| 12 Feb 2025, 10:52 | 0.2 | 0.2 mg/l |
| 22 Jan 2025, 13:12 | 0.16 | 0.16 mg/l |
| 3 Dec 2024, 11:36 | 0.2 | 0.2 mg/l |
| 18 Nov 2024, 10:22 | 0.23 | 0.23 mg/l |
| 15 Oct 2024, 10:10 | 0.19 | 0.19 mg/l |
| 23 Sep 2024, 10:54 | 0.31 | 0.31 mg/l |
| 28 Aug 2024, 07:27 | 0.27 | 0.27 mg/l |
| 22 May 2024, 09:34 | 0.25 | 0.25 mg/l |
| 18 Apr 2024, 09:32 | 0.18 | 0.18 mg/l |
| 18 Mar 2024, 12:41 | 0.19 | 0.19 mg/l |
| 19 Feb 2024, 13:01 | 0.25 | 0.25 mg/l |
| 24 Jan 2024, 14:05 | 0.24 | 0.24 mg/l |
| 7 Dec 2023, 13:35 | 0.21 | 0.21 mg/l |
| 20 Nov 2023, 13:26 | 0.23 | 0.23 mg/l |
| 16 Oct 2023, 11:13 | 0.31 | 0.31 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
3216 µS/cm
Sampled 27 May 2026, 4 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 10:04 | 3216 | 3216 µS/cm |
| 22 Apr 2026, 11:42 | 2671 | 2671 µS/cm |
| 6 Mar 2026, 14:02 | 1807 | 1807 µS/cm |
| 11 Feb 2026, 10:46 | 1092 | 1092 µS/cm |
| 27 Jan 2026, 13:33 | 609 | 609 µS/cm |
| 16 Dec 2025, 12:56 | 873 | 873 µS/cm |
| 12 Dec 2025, 14:37 | 1410 | 1410 µS/cm |
| 26 Nov 2025, 12:04 | 1720 | 1720 µS/cm |
| 20 Oct 2025, 10:00 | 899 | 899 µS/cm |
| 24 Sep 2025, 11:54 | 2503 | 2503 µS/cm |
| 20 Aug 2025, 14:56 | 3009 | 3009 µS/cm |
| 8 Apr 2025, 14:39 | 2582 | 2582 µS/cm |
| 4 Mar 2025, 13:21 | 2061 | 2061 µS/cm |
| 12 Feb 2025, 10:52 | 1916 | 1916 µS/cm |
| 22 Jan 2025, 13:12 | 2143 | 2143 µS/cm |
| 3 Dec 2024, 11:36 | 1427 | 1427 µS/cm |
| 18 Nov 2024, 10:22 | 2675 | 2675 µS/cm |
| 15 Oct 2024, 10:10 | 2057 | 2057 µS/cm |
| 23 Sep 2024, 10:54 | 1190 | 1190 µS/cm |
| 28 Aug 2024, 07:27 | 3357 | 3357 µS/cm |
| 22 May 2024, 09:34 | 1901 | 1901 µS/cm |
| 18 Apr 2024, 09:32 | 2075 | 2075 µS/cm |
| 18 Mar 2024, 12:41 | 1079 | 1079 µS/cm |
| 19 Feb 2024, 13:01 | 957 | 957 µS/cm |
| 24 Jan 2024, 14:05 | 1435 | 1435 µS/cm |
| 7 Dec 2023, 13:35 | 1144 | 1144 µS/cm |
| 20 Nov 2023, 13:26 | 1555 | 1555 µS/cm |
| 16 Oct 2023, 11:13 | 2042 | 2042 µS/cm |
Everything measured here
62 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 62 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Oct 2023 – May 2026 | 89% 27 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 28 | Oct 2023 – May 2026 | 8.35 mg/l 27 May 2026 |
| Temperature of Water 0076 | River water | 28 | Oct 2023 – May 2026 | 18.3 °C 27 May 2026 |
| pH 0061 | River water | 28 | Oct 2023 – May 2026 | 7.91 27 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Oct 2023 – May 2026 | 0.091 mg/l 27 May 2026 |
| Nitrate as N 0117 | River water | 28 | Oct 2023 – May 2026 | 7.15 mg/l 27 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 28 | Oct 2023 – May 2026 | 0.26 mg/l 27 May 2026 |
| Conductivity at 25 C 0077 | River water | 28 | Oct 2023 – May 2026 | 3216 µS/cm 27 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 3 | May 2024 – Mar 2025 | below 0.004 µg/l 4 Mar 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 3 | May 2024 – Mar 2025 | below 0.005 µg/l 4 Mar 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 28 | Oct 2023 – May 2026 | 240 mg/l 27 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 28 | Oct 2023 – May 2026 | 0.00248 mg/l 27 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 18 | Feb 2024 – May 2026 | below 4 mg/l 27 May 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 28 | Oct 2023 – Aug 2026 | 1.7 µg/l 20 Aug 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| Nitrite as N 0118 | River water | 28 | Oct 2023 – May 2026 | 0.05 mg/l 27 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Oct 2023 – May 2026 | 7.2 mg/l 27 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 3 | May 2024 – Mar 2025 | 0.0032 µg/l 4 Mar 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Sep 2024 – Mar 2025 | 0.002 µg/l 4 Mar 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| Perfluorodecanoic acid 8892 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 3 | May 2024 – Mar 2025 | below 0.005 µg/l 4 Mar 2025 |
| Perfluorododecanoic acid 8894 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluoroheptanoic acid 8889 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 3 | May 2024 – Mar 2025 | 0.0015 µg/l 4 Mar 2025 |
| Perfluorohexanoic acid 8888 | River water | 3 | May 2024 – Mar 2025 | 0.002 µg/l 4 Mar 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluorononanoic acid 8891 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 4 Mar 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Sep 2024 – Mar 2025 | 0.0011 µg/l 4 Mar 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 3 | May 2024 – Mar 2025 | 0.00089 µg/l 4 Mar 2025 |
| Perfluorooctanoic acid 8890 | River water | 3 | May 2024 – Mar 2025 | 0.0015 µg/l 4 Mar 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 4 Mar 2025 |
| Perfluoropentanoic acid 8887 | River water | 3 | May 2024 – Mar 2025 | 0.0018 µg/l 4 Mar 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 3 | May 2024 – Mar 2025 | below 0.006 µg/l 4 Mar 2025 |
| Perfluorotridecanoic acid 2955 | River water | 3 | May 2024 – Mar 2025 | below 0.005 µg/l 4 Mar 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 3 | May 2024 – Mar 2025 | below 0.004 µg/l 4 Mar 2025 |
| Perfluoroundecanoic acid 8893 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 4 Mar 2025 |
| Solids, Suspended at 105 C 0135 | River water | 25 | Oct 2023 – Mar 2026 | 14 mg/l 6 Mar 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.