River Smite at Colston Bassett
EA name: RIVER SMITE AT COLSTON BASSETT
Environment Agency sampling point MD-42488110 · 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
- 11 Mar 2026, 11:127 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
- 27 since 24 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 469786, 333273As published, to the nearest 1 m. Open in a map
- River, by its own name
- Smite
- River, by the map
- River SmitePlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- Colston Bassett On the River Smite · 0.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
104.5%
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 104.5 | 104.5% |
| 10 Feb 2026, 11:32 | 94.3 | 94.3% |
| 26 Jan 2026, 09:13 | 97.8 | 97.8% |
| 1 Dec 2025, 09:30 | 91.9 | 91.9% |
| 10 Nov 2025, 09:55 | 78.3 | 78.3% |
| 13 Oct 2025, 10:26 | 83.5 | 83.5% |
| 16 Sep 2025, 10:33 | 78.8 | 78.8% |
| 22 Aug 2025, 09:04 | 82.1 | 82.1% |
| 2 Apr 2025, 14:03 | 126.1 | 126.1% |
| 19 Mar 2025, 07:42 | 91.6 | 91.6% |
| 10 Feb 2025, 08:43 | 97.5 | 97.5% |
| 14 Jan 2025, 14:04 | 99.3 | 99.3% |
| 13 Dec 2024, 10:17 | 95.3 | 95.3% |
| 7 Nov 2024, 08:36 | 89.1 | 89.1% |
| 2 Oct 2024, 12:21 | 84.8 | 84.8% |
| 6 Sep 2024, 12:01 | 88.1 | 88.1% |
| 1 Aug 2024, 08:10 | 68.2 | 68.2% |
| 2 Jul 2024, 09:35 | 86.9 | 86.9% |
| 3 Jun 2024, 09:23 | 98.6 | 98.6% |
| 4 Mar 2024, 08:04 | 95.5 | 95.5% |
| 2 Feb 2024, 09:40 | 96.6 | 96.6% |
| 8 Jan 2024, 11:10 | 96.9 | 96.9% |
| 13 Dec 2023, 12:09 | 92.6 | 92.6% |
| 3 Nov 2023, 09:24 | 87.1 | 87.1% |
| 24 Oct 2023, 12:05 | 93.1 | 93.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.1 mg/l
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 12.1 | 12.1 mg/l |
| 10 Feb 2026, 11:32 | 11.3 | 11.3 mg/l |
| 26 Jan 2026, 09:13 | 12.3 | 12.3 mg/l |
| 1 Dec 2025, 09:30 | 10.9 | 10.9 mg/l |
| 10 Nov 2025, 09:55 | 8.6 | 8.6 mg/l |
| 13 Oct 2025, 10:26 | 9.19 | 9.19 mg/l |
| 16 Sep 2025, 10:33 | 8.3 | 8.3 mg/l |
| 22 Aug 2025, 09:04 | 8.57 | 8.57 mg/l |
| 2 Apr 2025, 14:03 | 14.2 | 14.2 mg/l |
| 19 Mar 2025, 07:42 | 12.5 | 12.5 mg/l |
| 10 Feb 2025, 08:43 | 12.5 | 12.5 mg/l |
| 14 Jan 2025, 14:04 | 12.4 | 12.4 mg/l |
| 13 Dec 2024, 10:17 | 11.5 | 11.5 mg/l |
| 7 Nov 2024, 08:36 | 9.92 | 9.92 mg/l |
| 2 Oct 2024, 12:21 | 8.97 | 8.97 mg/l |
| 6 Sep 2024, 12:01 | 8.47 | 8.47 mg/l |
| 1 Aug 2024, 08:10 | 6.43 | 6.43 mg/l |
| 2 Jul 2024, 09:35 | 8.97 | 8.97 mg/l |
| 3 Jun 2024, 09:23 | 10.2 | 10.2 mg/l |
| 4 Mar 2024, 08:04 | 12.7 | 12.7 mg/l |
| 2 Feb 2024, 09:40 | 11.9 | 11.9 mg/l |
| 8 Jan 2024, 11:10 | 12.4 | 12.4 mg/l |
| 13 Dec 2023, 12:09 | 11.1 | 11.1 mg/l |
| 3 Nov 2023, 09:24 | 9.95 | 9.95 mg/l |
| 24 Oct 2023, 12:05 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
9 °C
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 9 | 9 °C |
| 10 Feb 2026, 11:32 | 7.3 | 7.3 °C |
| 26 Jan 2026, 09:13 | 5.4 | 5.4 °C |
| 1 Dec 2025, 09:30 | 8 | 8 °C |
| 10 Nov 2025, 09:55 | 11.1 | 11.1 °C |
| 13 Oct 2025, 10:26 | 11 | 11 °C |
| 16 Sep 2025, 10:33 | 12.9 | 12.9 °C |
| 22 Aug 2025, 09:04 | 13.3 | 13.3 °C |
| 2 Apr 2025, 14:03 | 10 | 10 °C |
| 19 Mar 2025, 07:42 | 2.4 | 2.4 °C |
| 10 Feb 2025, 08:43 | 4.7 | 4.7 °C |
| 14 Jan 2025, 14:04 | 5.9 | 5.9 °C |
| 13 Dec 2024, 10:17 | 7.3 | 7.3 °C |
| 7 Nov 2024, 08:36 | 10.5 | 10.5 °C |
| 2 Oct 2024, 12:21 | 12.7 | 12.7 °C |
| 6 Sep 2024, 12:01 | 17.1 | 17.1 °C |
| 1 Aug 2024, 08:10 | 18.1 | 18.1 °C |
| 2 Jul 2024, 09:35 | 13.8 | 13.8 °C |
| 3 Jun 2024, 09:23 | 13.5 | 13.5 °C |
| 4 Mar 2024, 08:04 | 3.5 | 3.5 °C |
| 2 Feb 2024, 09:40 | 6.3 | 6.3 °C |
| 8 Jan 2024, 11:10 | 4.8 | 4.8 °C |
| 13 Dec 2023, 12:09 | 7.3 | 7.3 °C |
| 3 Nov 2023, 09:24 | 9.4 | 9.4 °C |
| 24 Oct 2023, 12:05 | 11.9 | 11.9 °C |
pH
code 0061
8.27
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 8.27 | 8.27 |
| 10 Feb 2026, 11:32 | 8.16 | 8.16 |
| 26 Jan 2026, 09:13 | 8.21 | 8.21 |
| 1 Dec 2025, 09:30 | 7.92 | 7.92 |
| 10 Nov 2025, 09:55 | 7.9 | 7.9 |
| 13 Oct 2025, 10:26 | 7.96 | 7.96 |
| 16 Sep 2025, 10:33 | 7.97 | 7.97 |
| 22 Aug 2025, 09:04 | 8.2 | 8.2 |
| 2 Apr 2025, 14:03 | 8.44 | 8.44 |
| 19 Mar 2025, 07:42 | 8.28 | 8.28 |
| 10 Feb 2025, 08:43 | 8.25 | 8.25 |
| 14 Jan 2025, 14:04 | 8.16 | 8.16 |
| 13 Dec 2024, 10:17 | 8.2 | 8.2 |
| 7 Nov 2024, 08:36 | 8.12 | 8.12 |
| 2 Oct 2024, 12:21 | 7.67 | 7.67 |
| 6 Sep 2024, 12:01 | 7.95 | 7.95 |
| 1 Aug 2024, 08:10 | 7.96 | 7.96 |
| 2 Jul 2024, 09:35 | 8.09 | 8.09 |
| 3 Jun 2024, 09:23 | 8.14 | 8.14 |
| 4 Mar 2024, 08:04 | 8.18 | 8.18 |
| 2 Feb 2024, 09:40 | 8.21 | 8.21 |
| 8 Jan 2024, 11:10 | 8.1 | 8.1 |
| 13 Dec 2023, 12:09 | 7.79 | 7.79 |
| 3 Nov 2023, 09:24 | 7.76 | 7.76 |
| 24 Oct 2023, 12:05 | 7.97 | 7.97 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.045 mg/l
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 0.045 | 0.045 mg/l |
| 10 Feb 2026, 11:32 | 0.076 | 0.076 mg/l |
| 26 Jan 2026, 09:13 | 0.039 | 0.039 mg/l |
| 1 Dec 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Nov 2025, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Oct 2025, 10:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2025, 10:33 | 0.034 | 0.034 mg/l |
| 22 Aug 2025, 09:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Apr 2025, 14:03 | 0.035 | 0.035 mg/l |
| 19 Mar 2025, 07:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 08:43 | 0.15 | 0.15 mg/l |
| 14 Jan 2025, 14:04 | 0.079 | 0.079 mg/l |
| 13 Dec 2024, 10:17 | 0.05 | 0.05 mg/l |
| 7 Nov 2024, 08:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2024, 12:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Sep 2024, 12:01 | 0.034 | 0.034 mg/l |
| 1 Aug 2024, 08:10 | 0.045 | 0.045 mg/l |
| 2 Jul 2024, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2024, 09:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2024, 08:04 | 0.16 | 0.16 mg/l |
| 2 Feb 2024, 09:40 | 0.056 | 0.056 mg/l |
| 8 Jan 2024, 11:10 | 0.061 | 0.061 mg/l |
| 13 Dec 2023, 12:09 | 0.15 | 0.15 mg/l |
| 3 Nov 2023, 09:24 | 0.03 | 0.03 mg/l |
| 24 Oct 2023, 12:05 | 0.031 | 0.031 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.48 mg/l
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 7.48 | 7.48 mg/l |
| 10 Feb 2026, 11:32 | 9.06 | 9.06 mg/l |
| 26 Jan 2026, 09:13 | 9.96 | 9.96 mg/l |
| 1 Dec 2025, 09:30 | 19 | 19 mg/l |
| 10 Nov 2025, 09:55 | 5.38 | 5.38 mg/l |
| 13 Oct 2025, 10:26 | 9.48 | 9.48 mg/l |
| 16 Sep 2025, 10:33 | 6.48 | 6.48 mg/l |
| 22 Aug 2025, 09:04 | 13 | 13 mg/l |
| 2 Apr 2025, 14:03 | 5.88 | 5.88 mg/l |
| 19 Mar 2025, 07:42 | 7.1 | 7.1 mg/l |
| 10 Feb 2025, 08:43 | 4.76 | 4.76 mg/l |
| 14 Jan 2025, 14:04 | 6.88 | 6.88 mg/l |
| 13 Dec 2024, 10:17 | 7.17 | 7.17 mg/l |
| 7 Nov 2024, 08:36 | 6.39 | 6.39 mg/l |
| 2 Oct 2024, 12:21 | 9.97 | 9.97 mg/l |
| 6 Sep 2024, 12:01 | 8.77 | 8.77 mg/l |
| 1 Aug 2024, 08:10 | 8.36 | 8.36 mg/l |
| 2 Jul 2024, 09:35 | 7.58 | 7.58 mg/l |
| 3 Jun 2024, 09:23 | 5.38 | 5.38 mg/l |
| 4 Mar 2024, 08:04 | 4.28 | 4.28 mg/l |
| 2 Feb 2024, 09:40 | 5.28 | 5.28 mg/l |
| 8 Jan 2024, 11:10 | 5.38 | 5.38 mg/l |
| 13 Dec 2023, 12:09 | 5.17 | 5.17 mg/l |
| 3 Nov 2023, 09:24 | 5.28 | 5.28 mg/l |
| 24 Oct 2023, 12:05 | 9.97 | 9.97 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.081 mg/l
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 0.081 | 0.081 mg/l |
| 10 Feb 2026, 11:32 | 0.087 | 0.087 mg/l |
| 26 Jan 2026, 09:13 | 0.07 | 0.07 mg/l |
| 1 Dec 2025, 09:30 | 0.1 | 0.1 mg/l |
| 10 Nov 2025, 09:55 | 0.18 | 0.18 mg/l |
| 13 Oct 2025, 10:26 | 0.17 | 0.17 mg/l |
| 16 Sep 2025, 10:33 | 0.34 | 0.34 mg/l |
| 22 Aug 2025, 09:04 | 0.16 | 0.16 mg/l |
| 2 Apr 2025, 14:03 | 0.053 | 0.053 mg/l |
| 19 Mar 2025, 07:42 | 0.035 | 0.035 mg/l |
| 10 Feb 2025, 08:43 | 0.12 | 0.12 mg/l |
| 14 Jan 2025, 14:04 | 0.087 | 0.087 mg/l |
| 13 Dec 2024, 10:17 | 0.11 | 0.11 mg/l |
| 7 Nov 2024, 08:36 | 0.091 | 0.091 mg/l |
| 2 Oct 2024, 12:21 | 0.16 | 0.16 mg/l |
| 6 Sep 2024, 12:01 | 0.14 | 0.14 mg/l |
| 1 Aug 2024, 08:10 | 0.091 | 0.091 mg/l |
| 2 Jul 2024, 09:35 | 0.12 | 0.12 mg/l |
| 3 Jun 2024, 09:23 | 0.11 | 0.11 mg/l |
| 4 Mar 2024, 08:04 | 0.12 | 0.12 mg/l |
| 2 Feb 2024, 09:40 | 0.11 | 0.11 mg/l |
| 8 Jan 2024, 11:10 | 0.098 | 0.098 mg/l |
| 13 Dec 2023, 12:09 | 0.14 | 0.14 mg/l |
| 3 Nov 2023, 09:24 | 0.14 | 0.14 mg/l |
| 24 Oct 2023, 12:05 | 0.11 | 0.11 mg/l |
Turbidity
code 6396 · NTU
6 NTU
Sampled 11 Mar 2026, 7 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 6 | 6 NTU |
| 10 Feb 2026, 11:32 | 24 | 24 NTU |
| 26 Jan 2026, 09:13 | 13 | 13 NTU |
| 1 Dec 2025, 09:30 | 15 | 15 NTU |
| 10 Nov 2025, 09:55 | 3.7 | 3.7 NTU |
| 13 Oct 2025, 10:26 | 5.4 | 5.4 NTU |
| 16 Sep 2025, 10:33 | 15 | 15 NTU |
| 22 Aug 2025, 09:04 | 3.3 | 3.3 NTU |
| 2 Apr 2025, 14:03 | 3.7 | 3.7 NTU |
| 19 Mar 2025, 07:42 | 4.5 | 4.5 NTU |
| 10 Feb 2025, 08:43 | 22 | 22 NTU |
| 14 Jan 2025, 14:04 | 10 | 10 NTU |
| 13 Dec 2024, 10:17 | 14 | 14 NTU |
| 7 Nov 2024, 08:36 | 3.6 | 3.6 NTU |
| 2 Oct 2024, 12:21 | 54 | 54 NTU |
| 6 Sep 2024, 12:01 | 4.9 | 4.9 NTU |
| 1 Aug 2024, 08:10 | 4.1 | 4.1 NTU |
| 3 Jul 2024, 09:51 | 4.8 | 4.8 NTU |
| 2 Jul 2024, 09:35 | 4.4 | 4.4 NTU |
| 3 Jun 2024, 09:23 | 8 | 8 NTU |
| 4 Mar 2024, 08:04 | 20 | 20 NTU |
| 2 Feb 2024, 09:40 | 9 | 9 NTU |
| 8 Jan 2024, 11:10 | 15 | 15 NTU |
| 13 Dec 2023, 12:09 | 82 | 82 NTU |
| 3 Nov 2023, 09:24 | 170 | 170 NTU |
| 24 Oct 2023, 12:05 | 21 | 21 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
796 µS/cm
Sampled 11 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 11:12 | 796 | 796 µS/cm |
| 10 Feb 2026, 11:32 | 622 | 622 µS/cm |
| 26 Jan 2026, 09:13 | 688 | 688 µS/cm |
| 1 Dec 2025, 09:30 | 731 | 731 µS/cm |
| 10 Nov 2025, 09:55 | 820 | 820 µS/cm |
| 13 Oct 2025, 10:26 | 1041 | 1041 µS/cm |
| 16 Sep 2025, 10:33 | 743 | 743 µS/cm |
| 22 Aug 2025, 09:04 | 1285 | 1285 µS/cm |
| 2 Apr 2025, 14:03 | 969 | 969 µS/cm |
| 19 Mar 2025, 07:42 | 950 | 950 µS/cm |
| 10 Feb 2025, 08:43 | 761 | 761 µS/cm |
| 14 Jan 2025, 14:04 | 778 | 778 µS/cm |
| 13 Dec 2024, 10:17 | 740 | 740 µS/cm |
| 7 Nov 2024, 08:36 | 936 | 936 µS/cm |
| 2 Oct 2024, 12:21 | 499 | 499 µS/cm |
| 6 Sep 2024, 12:01 | 1090 | 1090 µS/cm |
| 1 Aug 2024, 08:10 | 1067 | 1067 µS/cm |
| 2 Jul 2024, 09:35 | 1023 | 1023 µS/cm |
| 3 Jun 2024, 09:23 | 873 | 873 µS/cm |
| 4 Mar 2024, 08:04 | 758 | 758 µS/cm |
| 2 Feb 2024, 09:40 | 870 | 870 µS/cm |
| 8 Jan 2024, 11:10 | 749 | 749 µS/cm |
| 13 Dec 2023, 12:09 | 585 | 585 µS/cm |
| 3 Nov 2023, 09:24 | 478 | 478 µS/cm |
| 24 Oct 2023, 12:05 | 776 | 776 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 | 25 | Oct 2023 – Mar 2026 | 104.5% 11 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 25 | Oct 2023 – Mar 2026 | 12.1 mg/l 11 Mar 2026 |
| Temperature of Water 0076 | River water | 25 | Oct 2023 – Mar 2026 | 9 °C 11 Mar 2026 |
| pH 0061 | River water | 25 | Oct 2023 – Mar 2026 | 8.27 11 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Oct 2023 – Mar 2026 | 0.045 mg/l 11 Mar 2026 |
| Nitrate as N 0117 | River water | 25 | Oct 2023 – Mar 2026 | 7.48 mg/l 11 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Oct 2023 – Mar 2026 | 0.081 mg/l 11 Mar 2026 |
| Turbidity 6396 | River water | 26 | Oct 2023 – Mar 2026 | 6 NTU 11 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 25 | Oct 2023 – Mar 2026 | 796 µS/cm 11 Mar 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | May 2024 – May 2024 | below 0.004 µg/l 1 May 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | May 2024 – May 2024 | below 0.005 µg/l 1 May 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Oct 2023 – Mar 2026 | 230 mg/l 11 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 25 | Oct 2023 – Mar 2026 | 0.00076 mg/l 11 Mar 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 23 | Oct 2023 – Mar 2026 | 1.2 µg/l 11 Mar 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| Nitrite as N 0118 | River water | 25 | Oct 2023 – Mar 2026 | 0.12 mg/l 11 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Oct 2023 – Mar 2026 | 7.6 mg/l 11 Mar 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | May 2024 – May 2024 | 0.0011 µg/l 1 May 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | May 2024 – May 2024 | below 0.005 µg/l 1 May 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | May 2024 – May 2024 | 0.0016 µg/l 1 May 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | May 2024 – May 2024 | 0.00067 µg/l 1 May 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | May 2024 – May 2024 | below 0.0005 µg/l 1 May 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | May 2024 – May 2024 | below 0.001 µg/l 1 May 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | May 2024 – May 2024 | below 0.006 µg/l 1 May 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | May 2024 – May 2024 | below 0.005 µg/l 1 May 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | May 2024 – May 2024 | below 0.004 µg/l 1 May 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | May 2024 – May 2024 | below 0.002 µg/l 1 May 2024 |
| Solids, Suspended at 105 C 0135 | River water | 26 | Oct 2023 – Mar 2026 | 8.6 mg/l 11 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.