River Severn at Buildwas
EA name: R.SEVERN AT BUILDWAS (also listed as “RIVER SEVERN AT BUILDWAS”)
Environment Agency sampling point MD-00047820 · 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
- 18 May 2026, 13:544 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
- 28 since 10 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 364500, 304400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Severn
- River, by the map
- Afon HafrenPlaced on the river its name gives, 33 m from the line.
- Next gauge downstream
- Bridgnorth On the River Severn · 18 km along the riverBeside Buildwas: too close to say above or below.
- Nearest gauge upstream
- Boreton Bridge On the Cound Brook · 21 km along the riverWalcot On the River Tern · 23 km along the riverLeaton Knolls LVL 28 km along the river
- Why it was sampled
- Monitoring (national agency policy) (28 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
115.6%
Sampled 18 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 115.6 | 115.6% |
| 27 Apr 2026, 14:14 | 122.4 | 122.4% |
| 9 Mar 2026, 10:26 | 96.4 | 96.4% |
| 1 Dec 2025, 10:45 | 96.9 | 96.9% |
| 5 Nov 2025, 12:51 | 94.9 | 94.9% |
| 9 Oct 2025, 08:34 | 94.4 | 94.4% |
| 1 Sep 2025, 13:50 | 99.5 | 99.5% |
| 11 Aug 2025, 12:11 | 104.9 | 104.9% |
| 12 Jun 2025, 14:07 | 97.1 | 97.1% |
| 9 May 2025, 08:25 | 101.6 | 101.6% |
| 9 Apr 2025, 10:10 | 107.4 | 107.4% |
| 14 Mar 2025, 10:31 | 97.1 | 97.1% |
| 14 Feb 2025, 09:34 | 97.2 | 97.2% |
| 30 Jan 2025, 09:14 | 95.2 | 95.2% |
| 17 Dec 2024, 09:58 | 97.7 | 97.7% |
| 20 Nov 2024, 12:11 | 87 | 87% |
| 30 Oct 2024, 08:39 | 95.1 | 95.1% |
| 24 Sep 2024, 14:01 | 90 | 90% |
| 23 Aug 2024, 08:30 | 93.5 | 93.5% |
| 24 Jul 2024, 11:31 | 91.3 | 91.3% |
| 17 Jun 2024, 09:23 | 97.1 | 97.1% |
| 15 Mar 2024, 12:06 | 96.7 | 96.7% |
| 5 Feb 2024, 10:24 | 96.5 | 96.5% |
| 11 Jan 2024, 13:43 | 91.2 | 91.2% |
| 7 Dec 2023, 08:33 | 92.3 | 92.3% |
| 16 Nov 2023, 12:05 | 86.3 | 86.3% |
| 10 Oct 2023, 12:33 | 92.1 | 92.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.8 mg/l
Sampled 18 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 11.8 | 11.8 mg/l |
| 27 Apr 2026, 14:14 | 12.3 | 12.3 mg/l |
| 9 Mar 2026, 10:26 | 11.2 | 11.2 mg/l |
| 1 Dec 2025, 10:45 | 11.5 | 11.5 mg/l |
| 5 Nov 2025, 12:51 | 10.2 | 10.2 mg/l |
| 9 Oct 2025, 08:34 | 10.1 | 10.1 mg/l |
| 1 Sep 2025, 13:50 | 9.63 | 9.63 mg/l |
| 11 Aug 2025, 12:11 | 9.55 | 9.55 mg/l |
| 12 Jun 2025, 14:07 | 9.28 | 9.28 mg/l |
| 9 May 2025, 08:25 | 10.9 | 10.9 mg/l |
| 9 Apr 2025, 10:10 | 12 | 12 mg/l |
| 14 Mar 2025, 10:31 | 11.7 | 11.7 mg/l |
| 14 Feb 2025, 09:34 | 12.8 | 12.8 mg/l |
| 30 Jan 2025, 09:14 | 12 | 12 mg/l |
| 17 Dec 2024, 09:58 | 11.5 | 11.5 mg/l |
| 20 Nov 2024, 12:11 | 10.8 | 10.8 mg/l |
| 30 Oct 2024, 08:39 | 10.3 | 10.3 mg/l |
| 24 Sep 2024, 14:01 | 9.23 | 9.23 mg/l |
| 23 Aug 2024, 08:30 | 9.22 | 9.22 mg/l |
| 24 Jul 2024, 11:31 | 8.43 | 8.43 mg/l |
| 17 Jun 2024, 09:23 | 9.81 | 9.81 mg/l |
| 15 Mar 2024, 12:06 | 10.8 | 10.8 mg/l |
| 5 Feb 2024, 10:24 | 11.2 | 11.2 mg/l |
| 11 Jan 2024, 13:43 | 11.8 | 11.8 mg/l |
| 7 Dec 2023, 08:33 | 11.7 | 11.7 mg/l |
| 16 Nov 2023, 12:05 | 10.1 | 10.1 mg/l |
| 10 Oct 2023, 12:33 | 9.24 | 9.24 mg/l |
Water temperature
code 0076 · °C
14.2 °C
Sampled 18 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 14.2 | 14.2 °C |
| 27 Apr 2026, 14:14 | 15.2 | 15.2 °C |
| 9 Mar 2026, 10:26 | 8.7 | 8.7 °C |
| 1 Dec 2025, 10:45 | 7.7 | 7.7 °C |
| 5 Nov 2025, 12:51 | 12.2 | 12.2 °C |
| 9 Oct 2025, 08:34 | 12.2 | 12.2 °C |
| 1 Sep 2025, 13:50 | 16.8 | 16.8 °C |
| 11 Aug 2025, 12:11 | 19.8 | 19.8 °C |
| 12 Jun 2025, 14:07 | 17.4 | 17.4 °C |
| 9 May 2025, 08:25 | 12.1 | 12.1 °C |
| 9 Apr 2025, 10:10 | 10.2 | 10.2 °C |
| 14 Mar 2025, 10:31 | 7.1 | 7.1 °C |
| 14 Feb 2025, 09:34 | 3.9 | 3.9 °C |
| 30 Jan 2025, 09:14 | 5.4 | 5.4 °C |
| 17 Dec 2024, 09:58 | 8.3 | 8.3 °C |
| 20 Nov 2024, 12:11 | 6 | 6 °C |
| 30 Oct 2024, 08:39 | 11.6 | 11.6 °C |
| 24 Sep 2024, 14:01 | 14.1 | 14.1 °C |
| 23 Aug 2024, 08:30 | 15.9 | 15.9 °C |
| 24 Jul 2024, 11:31 | 19.1 | 19.1 °C |
| 17 Jun 2024, 09:23 | 14.8 | 14.8 °C |
| 15 Mar 2024, 12:06 | 10.3 | 10.3 °C |
| 5 Feb 2024, 10:24 | 8.9 | 8.9 °C |
| 11 Jan 2024, 13:43 | 4.4 | 4.4 °C |
| 7 Dec 2023, 08:33 | 5.2 | 5.2 °C |
| 16 Nov 2023, 12:05 | 8.5 | 8.5 °C |
| 10 Oct 2023, 12:33 | 15.1 | 15.1 °C |
pH
code 0061
8.37
Sampled 18 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 8.37 | 8.37 |
| 27 Apr 2026, 14:14 | 8.56 | 8.56 |
| 9 Mar 2026, 10:26 | 7.88 | 7.88 |
| 1 Dec 2025, 10:45 | 7.79 | 7.79 |
| 5 Nov 2025, 12:51 | 7.54 | 7.54 |
| 9 Oct 2025, 08:34 | 8.03 | 8.03 |
| 1 Sep 2025, 13:50 | 8.21 | 8.21 |
| 11 Aug 2025, 12:11 | 8.14 | 8.14 |
| 12 Jun 2025, 14:07 | 8.08 | 8.08 |
| 9 May 2025, 08:25 | 8.19 | 8.19 |
| 9 Apr 2025, 10:10 | 8.46 | 8.46 |
| 14 Mar 2025, 10:31 | 8.05 | 8.05 |
| 14 Feb 2025, 09:34 | 7.68 | 7.68 |
| 30 Jan 2025, 09:14 | 7.79 | 7.79 |
| 17 Dec 2024, 09:58 | 7.85 | 7.85 |
| 20 Nov 2024, 12:11 | 7.77 | 7.77 |
| 30 Oct 2024, 08:39 | 7.81 | 7.81 |
| 24 Sep 2024, 14:01 | 7.85 | 7.85 |
| 23 Aug 2024, 08:30 | 8 | 8 |
| 24 Jul 2024, 11:31 | 7.98 | 7.98 |
| 17 Jun 2024, 09:23 | 8.07 | 8.07 |
| 15 Mar 2024, 12:06 | 7.72 | 7.72 |
| 5 Feb 2024, 10:24 | 7.93 | 7.93 |
| 11 Jan 2024, 13:43 | 7.65 | 7.65 |
| 7 Dec 2023, 08:33 | 7.31 | 7.31 |
| 16 Nov 2023, 12:05 | 7.36 | 7.36 |
| 10 Oct 2023, 12:33 | 7.75 | 7.75 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Apr 2026, 14:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Mar 2026, 10:26 | 0.032 | 0.032 mg/l |
| 1 Dec 2025, 10:45 | 0.042 | 0.042 mg/l |
| 5 Nov 2025, 12:51 | 0.053 | 0.053 mg/l |
| 9 Oct 2025, 08:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Sep 2025, 13:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Aug 2025, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jun 2025, 14:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2025, 10:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Mar 2025, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Feb 2025, 09:34 | 0.048 | 0.048 mg/l |
| 30 Jan 2025, 09:14 | 0.097 | 0.097 mg/l |
| 17 Dec 2024, 09:58 | 0.038 | 0.038 mg/l |
| 20 Nov 2024, 12:11 | 0.089 | 0.089 mg/l |
| 30 Oct 2024, 08:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Sep 2024, 14:01 | 0.065 | 0.065 mg/l |
| 23 Aug 2024, 08:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jul 2024, 11:31 | 0.04 | 0.04 mg/l |
| 17 Jun 2024, 09:23 | 0.031 | 0.031 mg/l |
| 15 Mar 2024, 12:06 | 0.076 | 0.076 mg/l |
| 5 Feb 2024, 10:24 | 0.059 | 0.059 mg/l |
| 11 Jan 2024, 13:43 | 0.14 | 0.14 mg/l |
| 7 Dec 2023, 08:33 | 0.27 | 0.27 mg/l |
| 16 Nov 2023, 12:05 | 0.071 | 0.071 mg/l |
| 10 Oct 2023, 12:33 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.79 mg/l
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 4.79 | 4.79 mg/l |
| 27 Apr 2026, 14:14 | 4.59 | 4.59 mg/l |
| 9 Mar 2026, 10:26 | 3.98 | 3.98 mg/l |
| 1 Dec 2025, 10:45 | 3.59 | 3.59 mg/l |
| 5 Nov 2025, 12:51 | 1.59 | 1.59 mg/l |
| 9 Oct 2025, 08:34 | 1.9 | 1.9 mg/l |
| 1 Sep 2025, 13:50 | 4.19 | 4.19 mg/l |
| 11 Aug 2025, 12:11 | 3.19 | 3.19 mg/l |
| 12 Jun 2025, 14:07 | 3.59 | 3.59 mg/l |
| 9 Apr 2025, 10:10 | 5.79 | 5.79 mg/l |
| 14 Mar 2025, 10:31 | 5.29 | 5.29 mg/l |
| 14 Feb 2025, 09:34 | 4.97 | 4.97 mg/l |
| 30 Jan 2025, 09:14 | 2.87 | 2.87 mg/l |
| 17 Dec 2024, 09:58 | 3.68 | 3.68 mg/l |
| 20 Nov 2024, 12:11 | 4.27 | 4.27 mg/l |
| 30 Oct 2024, 08:39 | 3.09 | 3.09 mg/l |
| 24 Sep 2024, 14:01 | 4.57 | 4.57 mg/l |
| 23 Aug 2024, 08:30 | 4.49 | 4.49 mg/l |
| 24 Jul 2024, 11:31 | 5.28 | 5.28 mg/l |
| 17 Jun 2024, 09:23 | 4.18 | 4.18 mg/l |
| 15 Mar 2024, 12:06 | 2.24 | 2.24 mg/l |
| 5 Feb 2024, 10:24 | 3.99 | 3.99 mg/l |
| 11 Jan 2024, 13:43 | 3.67 | 3.67 mg/l |
| 7 Dec 2023, 08:33 | 4.77 | 4.77 mg/l |
| 16 Nov 2023, 12:05 | 2.38 | 2.38 mg/l |
| 10 Oct 2023, 12:33 | 2 | 2 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.05 mg/l
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 0.05 | 0.05 mg/l |
| 27 Apr 2026, 14:14 | 0.038 | 0.038 mg/l |
| 9 Mar 2026, 10:26 | 0.059 | 0.059 mg/l |
| 1 Dec 2025, 10:45 | 0.073 | 0.073 mg/l |
| 5 Nov 2025, 12:51 | 0.1 | 0.1 mg/l |
| 9 Oct 2025, 08:34 | 0.042 | 0.042 mg/l |
| 1 Sep 2025, 13:50 | 0.073 | 0.073 mg/l |
| 11 Aug 2025, 12:11 | 0.047 | 0.047 mg/l |
| 12 Jun 2025, 14:07 | 0.17 | 0.17 mg/l |
| 9 Apr 2025, 10:10 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Mar 2025, 10:31 | 0.085 | 0.085 mg/l |
| 14 Feb 2025, 09:34 | 0.23 | 0.23 mg/l |
| 30 Jan 2025, 09:14 | 0.18 | 0.18 mg/l |
| 17 Dec 2024, 09:58 | 0.09 | 0.09 mg/l |
| 20 Nov 2024, 12:11 | 0.12 | 0.12 mg/l |
| 30 Oct 2024, 08:39 | 0.063 | 0.063 mg/l |
| 24 Sep 2024, 14:01 | 0.15 | 0.15 mg/l |
| 23 Aug 2024, 08:30 | 0.15 | 0.15 mg/l |
| 24 Jul 2024, 11:31 | 0.22 | 0.22 mg/l |
| 17 Jun 2024, 09:23 | 0.12 | 0.12 mg/l |
| 15 Mar 2024, 12:06 | 0.077 | 0.077 mg/l |
| 5 Feb 2024, 10:24 | 0.086 | 0.086 mg/l |
| 11 Jan 2024, 13:43 | 0.21 | 0.21 mg/l |
| 7 Dec 2023, 08:33 | 0.17 | 0.17 mg/l |
| 16 Nov 2023, 12:05 | 0.062 | 0.062 mg/l |
| 10 Oct 2023, 12:33 | 0.072 | 0.072 mg/l |
Turbidity
code 6396 · NTU
30 NTU
Sampled 15 Mar 2024, 2.5 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Mar 2024, 12:06 | 30 | 30 NTU |
| 5 Feb 2024, 10:24 | 5.9 | 5.9 NTU |
| 11 Jan 2024, 13:43 | 9.9 | 9.9 NTU |
| 7 Dec 2023, 08:33 | 18 | 18 NTU |
| 16 Nov 2023, 12:05 | 31 | 31 NTU |
| 10 Oct 2023, 12:33 | 8.4 | 8.4 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
487 µS/cm
Sampled 18 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 13:54 | 487 | 487 µS/cm |
| 27 Apr 2026, 14:14 | 441 | 441 µS/cm |
| 9 Mar 2026, 10:26 | 361 | 361 µS/cm |
| 1 Dec 2025, 10:45 | 223 | 223 µS/cm |
| 5 Nov 2025, 12:51 | 161 | 161 µS/cm |
| 9 Oct 2025, 08:34 | 227 | 227 µS/cm |
| 1 Sep 2025, 13:50 | 447 | 447 µS/cm |
| 11 Aug 2025, 12:11 | 359 | 359 µS/cm |
| 12 Jun 2025, 14:07 | 411 | 411 µS/cm |
| 9 May 2025, 08:25 | 571 | 571 µS/cm |
| 9 Apr 2025, 10:10 | 545 | 545 µS/cm |
| 14 Mar 2025, 10:31 | 463 | 463 µS/cm |
| 14 Feb 2025, 09:34 | 419 | 419 µS/cm |
| 30 Jan 2025, 09:14 | 243 | 243 µS/cm |
| 17 Dec 2024, 09:58 | 314 | 314 µS/cm |
| 20 Nov 2024, 12:11 | 376 | 376 µS/cm |
| 30 Oct 2024, 08:39 | 309 | 309 µS/cm |
| 24 Sep 2024, 14:01 | 341 | 341 µS/cm |
| 23 Aug 2024, 08:30 | 468 | 468 µS/cm |
| 24 Jul 2024, 11:31 | 479 | 479 µS/cm |
| 17 Jun 2024, 09:23 | 417 | 417 µS/cm |
| 15 Mar 2024, 12:06 | 207 | 207 µS/cm |
| 5 Feb 2024, 10:24 | 308 | 308 µS/cm |
| 11 Jan 2024, 13:43 | 304 | 304 µS/cm |
| 7 Dec 2023, 08:33 | 308 | 308 µS/cm |
| 16 Nov 2023, 12:05 | 185 | 185 µS/cm |
| 10 Oct 2023, 12:33 | 218 | 218 µS/cm |
Everything measured here
63 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 63 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 27 | Oct 2023 – May 2026 | 115.6% 18 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Oct 2023 – May 2026 | 11.8 mg/l 18 May 2026 |
| Temperature of Water 0076 | River water | 27 | Oct 2023 – May 2026 | 14.2 °C 18 May 2026 |
| pH 0061 | River water | 27 | Oct 2023 – May 2026 | 8.37 18 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Oct 2023 – May 2026 | below 0.03 mg/l 18 May 2026 |
| Nitrate as N 0117 | River water | 26 | Oct 2023 – May 2026 | 4.79 mg/l 18 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Oct 2023 – May 2026 | 0.05 mg/l 18 May 2026 |
| Turbidity 6396 | River water | 6 | Oct 2023 – Mar 2024 | 30 NTU 15 Mar 2024 |
| Conductivity at 25 C 0077 | River water | 27 | Oct 2023 – May 2026 | 487 µS/cm 18 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 3 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 4 | May 2024 – Mar 2025 | below 0.004 µg/l 14 Mar 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 4 | May 2024 – Mar 2025 | below 0.005 µg/l 14 Mar 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Oct 2023 – May 2026 | 130 mg/l 18 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Oct 2023 – May 2026 | below 0.00074 mg/l 18 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Jun 2024 – May 2026 | 1.8 mg/l 18 May 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 6 | Oct 2023 – Mar 2024 | 4.6 µg/l 15 Mar 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| Nitrite as N 0118 | River water | 26 | Oct 2023 – May 2026 | 0.011 mg/l 18 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Oct 2023 – May 2026 | 4.8 mg/l 18 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 4 | May 2024 – Mar 2025 | 0.0015 µg/l 14 Mar 2025 |
| Perfluorobutanoic acid 2995 | River water | 4 | May 2024 – Mar 2025 | 0.0012 µg/l 14 Mar 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| Perfluorodecanoic acid 8892 | River water | 3 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 4 | May 2024 – Mar 2025 | below 0.005 µg/l 14 Mar 2025 |
| Perfluorododecanoic acid 8894 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoroheptanoic acid 8889 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorohexanoic acid 8888 | River water | 4 | May 2024 – Mar 2025 | 0.00058 µg/l 14 Mar 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorononanoic acid 8891 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluorooctanoic acid 8890 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 14 Mar 2025 |
| Perfluoropentanoic acid 8887 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 14 Mar 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 4 | May 2024 – Mar 2025 | below 0.006 µg/l 14 Mar 2025 |
| Perfluorotridecanoic acid 2955 | River water | 4 | May 2024 – Mar 2025 | below 0.005 µg/l 14 Mar 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 4 | May 2024 – Mar 2025 | below 0.004 µg/l 14 Mar 2025 |
| Perfluoroundecanoic acid 8893 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 14 Mar 2025 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Oct 2023 – Mar 2024 | 42 mg/l 15 Mar 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.