Mayfly Inn
EA name: MAYFLY INN (also listed as “RIVER TEST AT MAYFLY INN (FORMALLY SEVEN STARS INN)”)
Environment Agency sampling point SO-G0003922 · 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, 13:3030 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 40 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 438173, 138974As published, to the nearest 1 m. Open in a map
- River, by its own name
- Test
- River, by the map
- River TestPlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- Stockbridge Side On the River Test · 5.9 km along the river
- Nearest gauge upstream
- Chilbolton Side On the River Test · 0.6 km along the riverCHILBOLTON BACK CARRIER 0.6 km along the riverWherwell On the River Test · 2.8 km along the river
- Why it was sampled
- Monitoring (national agency policy) (28 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Unplanned reactive monitoring formal (pollution incidents) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
131.1%
Sampled 1 Sep 2026, 30 days ago · 37 results banked
Every result (37)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 131.1 | 131.1% |
| 3 Aug 2026, 14:01 | 141.4 | 141.4% |
| 3 Jul 2026, 14:09 | 144.6 | 144.6% |
| 8 Jun 2026, 11:12 | 100.3 | 100.3% |
| 5 May 2026, 11:42 | 121.6 | 121.6% |
| 14 Apr 2026, 14:45 | 125 | 125% |
| 5 Mar 2026, 14:54 | 114.3 | 114.3% |
| 4 Feb 2026, 14:10 | 104.4 | 104.4% |
| 6 Jan 2026, 09:46 | 93 | 93% |
| 9 Dec 2025, 13:38 | 95.4 | 95.4% |
| 21 Nov 2025, 09:59 | 95.1 | 95.1% |
| 8 Oct 2025, 09:51 | 96.1 | 96.1% |
| 10 Sep 2025, 11:23 | 109.2 | 109.2% |
| 7 Aug 2025, 12:22 | 121.5 | 121.5% |
| 1 Jul 2025, 10:32 | 117.2 | 117.2% |
| 3 Jun 2025, 12:39 | 105.6 | 105.6% |
| 12 May 2025, 11:42 | 109.2 | 109.2% |
| 8 Apr 2025, 13:25 | 118.6 | 118.6% |
| 3 Mar 2025, 13:58 | 106.4 | 106.4% |
| 17 Feb 2025, 12:50 | 103.9 | 103.9% |
| 14 Jan 2025, 15:28 | 100.5 | 100.5% |
| 6 Dec 2024, 10:39 | 93.7 | 93.7% |
| 1 Nov 2024, 12:02 | 97.9 | 97.9% |
| 15 Oct 2024, 10:12 | 91.3 | 91.3% |
| 2 Sep 2024, 10:02 | 85.3 | 85.3% |
| 2 Aug 2024, 13:01 | 128.9 | 128.9% |
| 2 Jul 2024, 16:28 | 125.4 | 125.4% |
| 7 Jun 2024, 09:48 | 104.4 | 104.4% |
| 20 Mar 2024, 11:20 | 106.1 | 106.1% |
| 14 Mar 2024, 11:25 | 71.6 | 71.6% |
| 7 Mar 2024, 14:28 | 106.6 | 106.6% |
| 6 Mar 2024, 11:45 | 103.2 | 103.2% |
| 28 Feb 2024, 15:35 | 101.2 | 101.2% |
| 12 Feb 2024, 16:17 | 99.3 | 99.3% |
| 2 Feb 2024, 16:00 | 100 | 100% |
| 8 Jan 2024, 13:36 | 96.4 | 96.4% |
| 1 Nov 2023, 13:35 | 108.8 | 108.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.9 mg/l
Sampled 1 Sep 2026, 30 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 12.9 | 12.9 mg/l |
| 3 Aug 2026, 14:01 | 13.2 | 13.2 mg/l |
| 3 Jul 2026, 14:09 | 13.6 | 13.6 mg/l |
| 8 Jun 2026, 11:12 | 10.4 | 10.4 mg/l |
| 5 May 2026, 11:42 | 12.8 | 12.8 mg/l |
| 14 Apr 2026, 14:45 | 13.8 | 13.8 mg/l |
| 5 Mar 2026, 14:54 | 12.6 | 12.6 mg/l |
| 4 Feb 2026, 14:10 | 11.9 | 11.9 mg/l |
| 6 Jan 2026, 09:46 | 12.1 | 12.1 mg/l |
| 9 Dec 2025, 13:38 | 10.4 | 10.4 mg/l |
| 21 Nov 2025, 09:59 | 11.8 | 11.8 mg/l |
| 8 Oct 2025, 09:51 | 10.1 | 10.1 mg/l |
| 10 Sep 2025, 11:23 | 11.1 | 11.1 mg/l |
| 7 Aug 2025, 12:22 | 12 | 12 mg/l |
| 1 Jul 2025, 10:32 | 11 | 11 mg/l |
| 3 Jun 2025, 12:39 | 11 | 11 mg/l |
| 12 May 2025, 11:42 | 11.2 | 11.2 mg/l |
| 8 Apr 2025, 13:25 | 13.1 | 13.1 mg/l |
| 3 Mar 2025, 13:58 | 12.3 | 12.3 mg/l |
| 17 Feb 2025, 12:50 | 12.6 | 12.6 mg/l |
| 14 Jan 2025, 15:28 | 11.7 | 11.7 mg/l |
| 6 Dec 2024, 10:39 | 10.8 | 10.8 mg/l |
| 1 Nov 2024, 12:02 | 10.6 | 10.6 mg/l |
| 15 Oct 2024, 10:12 | 9.82 | 9.82 mg/l |
| 2 Sep 2024, 10:02 | 8.36 | 8.36 mg/l |
| 2 Aug 2024, 13:01 | 12.3 | 12.3 mg/l |
| 2 Jul 2024, 16:28 | 12.5 | 12.5 mg/l |
| 7 Jun 2024, 09:48 | 11 | 11 mg/l |
| 6 Mar 2024, 11:45 | 12.1 | 12.1 mg/l |
| 8 Jan 2024, 13:36 | 11.8 | 11.8 mg/l |
| 1 Nov 2023, 13:35 | 11.6 | 11.6 mg/l |
Water temperature
code 0076 · °C
16.1 °C
Sampled 1 Sep 2026, 30 days ago · 37 results banked
Every result (37)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 16.1 | 16.1 °C |
| 3 Aug 2026, 14:01 | 18.7 | 18.7 °C |
| 3 Jul 2026, 14:09 | 18.1 | 18.1 °C |
| 8 Jun 2026, 11:12 | 13.4 | 13.4 °C |
| 5 May 2026, 11:42 | 12.9 | 12.9 °C |
| 14 Apr 2026, 14:45 | 11 | 11 °C |
| 5 Mar 2026, 14:54 | 11 | 11 °C |
| 4 Feb 2026, 14:10 | 9.4 | 9.4 °C |
| 6 Jan 2026, 09:46 | 4.2 | 4.2 °C |
| 9 Dec 2025, 13:38 | 11.6 | 11.6 °C |
| 21 Nov 2025, 09:59 | 6.2 | 6.2 °C |
| 8 Oct 2025, 09:51 | 13 | 13 °C |
| 10 Sep 2025, 11:23 | 14.6 | 14.6 °C |
| 7 Aug 2025, 12:22 | 15.9 | 15.9 °C |
| 1 Jul 2025, 10:32 | 18.5 | 18.5 °C |
| 3 Jun 2025, 12:39 | 13.4 | 13.4 °C |
| 12 May 2025, 11:42 | 14 | 14 °C |
| 8 Apr 2025, 13:25 | 10.9 | 10.9 °C |
| 3 Mar 2025, 13:58 | 9 | 9 °C |
| 17 Feb 2025, 12:50 | 7.1 | 7.1 °C |
| 14 Jan 2025, 15:28 | 8.7 | 8.7 °C |
| 6 Dec 2024, 10:39 | 8.9 | 8.9 °C |
| 1 Nov 2024, 12:02 | 11.8 | 11.8 °C |
| 15 Oct 2024, 10:12 | 12 | 12 °C |
| 2 Sep 2024, 10:02 | 16.2 | 16.2 °C |
| 2 Aug 2024, 13:01 | 17.6 | 17.6 °C |
| 2 Jul 2024, 16:28 | 15.4 | 15.4 °C |
| 7 Jun 2024, 09:48 | 12.9 | 12.9 °C |
| 20 Mar 2024, 11:20 | 11.5 | 11.5 °C |
| 14 Mar 2024, 11:25 | 11.5 | 11.5 °C |
| 7 Mar 2024, 14:28 | 9.9 | 9.9 °C |
| 6 Mar 2024, 11:45 | 8.3 | 8.3 °C |
| 28 Feb 2024, 15:35 | 10 | 10 °C |
| 12 Feb 2024, 16:17 | 8.8 | 8.8 °C |
| 2 Feb 2024, 16:00 | 10 | 10 °C |
| 8 Jan 2024, 13:36 | 6.6 | 6.6 °C |
| 1 Nov 2023, 13:35 | 12.4 | 12.4 °C |
pH
code 0061
8.15
Sampled 1 Sep 2026, 30 days ago · 40 results banked
Every result (40)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 8.15 | 8.15 |
| 3 Aug 2026, 14:01 | 8.15 | 8.15 |
| 3 Jul 2026, 14:09 | 8.31 | 8.31 |
| 8 Jun 2026, 11:12 | 7.92 | 7.92 |
| 5 May 2026, 11:42 | 8.14 | 8.14 |
| 14 Apr 2026, 14:45 | 8.19 | 8.19 |
| 5 Mar 2026, 14:54 | 8.08 | 8.08 |
| 4 Feb 2026, 14:10 | 7.97 | 7.97 |
| 6 Jan 2026, 09:46 | 7.93 | 7.93 |
| 9 Dec 2025, 13:38 | 7.9 | 7.9 |
| 21 Nov 2025, 09:59 | 7.86 | 7.86 |
| 8 Oct 2025, 09:51 | 7.96 | 7.96 |
| 10 Sep 2025, 11:23 | 8.06 | 8.06 |
| 7 Aug 2025, 12:22 | 8.09 | 8.09 |
| 1 Jul 2025, 10:32 | 7.94 | 7.94 |
| 3 Jun 2025, 12:39 | 8 | 8 |
| 12 May 2025, 11:42 | 7.99 | 7.99 |
| 8 Apr 2025, 13:25 | 8.07 | 8.07 |
| 3 Mar 2025, 13:58 | 8.02 | 8.02 |
| 17 Feb 2025, 12:50 | 7.98 | 7.98 |
| 14 Jan 2025, 15:28 | 7.99 | 7.99 |
| 6 Dec 2024, 10:39 | 7.92 | 7.92 |
| 1 Nov 2024, 12:02 | 8 | 8 |
| 15 Oct 2024, 10:12 | 7.75 | 7.75 |
| 2 Sep 2024, 10:02 | 7.9 | 7.9 |
| 2 Aug 2024, 13:01 | 8.09 | 8.09 |
| 2 Jul 2024, 16:28 | 8.31 | 8.31 |
| 7 Jun 2024, 09:48 | 7.96 | 7.96 |
| 20 Mar 2024, 11:20 | 7.95 | 7.95 |
| 14 Mar 2024, 11:25 | 7.77 | 7.77 |
| 7 Mar 2024, 14:28 | 8.14 | 8.14 |
| 6 Mar 2024, 11:45 | 8.1 | 8.1 |
| 28 Feb 2024, 15:35 | 7.97 | 7.97 |
| 12 Feb 2024, 16:17 | 8 | 8 |
| 5 Feb 2024, 12:50 | 8.07 | 8.07 |
| 2 Feb 2024, 16:00 | 8.08 | 8.08 |
| 8 Jan 2024, 13:36 | 8.24 | 8.24 |
| 6 Dec 2023, 13:22 | 7.83 | 7.83 |
| 1 Nov 2023, 13:35 | 7.98 | 7.98 |
| 4 Oct 2023, 13:18 | 8.16 | 8.16 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Aug 2026, 14:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jul 2026, 14:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 11:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 May 2026, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 14:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 14:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2026, 14:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 13:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Nov 2025, 09:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Oct 2025, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Sep 2025, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Aug 2025, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2025, 10:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2025, 12:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 May 2025, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2025, 13:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 13:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Feb 2025, 12:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Jan 2025, 15:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Nov 2024, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Oct 2024, 10:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Sep 2024, 10:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Aug 2024, 13:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2024, 16:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jun 2024, 09:48 | 0.032 | 0.032 mg/l |
| 20 Mar 2024, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Mar 2024, 11:25 | 0.1 | 0.1 mg/l |
| 7 Mar 2024, 14:28 | 0.12 | 0.12 mg/l |
| 6 Mar 2024, 11:45 | 0.093 | 0.093 mg/l |
| 28 Feb 2024, 15:35 | 0.079 | 0.079 mg/l |
| 12 Feb 2024, 16:17 | <0.5 | below 0.5 mg/l (not detected above this) |
| 2 Feb 2024, 16:00 | <0.5 | below 0.5 mg/l (not detected above this) |
| 8 Jan 2024, 13:36 | 0.26 | 0.26 mg/l |
| 1 Nov 2023, 13:35 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
11 mg/l
Sampled 1 Sep 2026, 30 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 11 | 11 mg/l |
| 3 Aug 2026, 14:01 | 11 | 11 mg/l |
| 3 Jul 2026, 14:09 | 9.99 | 9.99 mg/l |
| 8 Jun 2026, 11:12 | 11 | 11 mg/l |
| 5 May 2026, 11:42 | 9.89 | 9.89 mg/l |
| 14 Apr 2026, 14:45 | 9.99 | 9.99 mg/l |
| 5 Mar 2026, 14:54 | 9.5 | 9.5 mg/l |
| 4 Feb 2026, 14:10 | 9.3 | 9.3 mg/l |
| 6 Jan 2026, 09:46 | 11 | 11 mg/l |
| 9 Dec 2025, 13:38 | 9.99 | 9.99 mg/l |
| 21 Nov 2025, 09:59 | 12 | 12 mg/l |
| 8 Oct 2025, 09:51 | 13 | 13 mg/l |
| 10 Sep 2025, 11:23 | 11 | 11 mg/l |
| 7 Aug 2025, 12:22 | 13 | 13 mg/l |
| 1 Jul 2025, 10:32 | 12 | 12 mg/l |
| 3 Jun 2025, 12:39 | 12 | 12 mg/l |
| 12 May 2025, 11:42 | 11 | 11 mg/l |
| 8 Apr 2025, 13:25 | 9.89 | 9.89 mg/l |
| 3 Mar 2025, 13:58 | 9.39 | 9.39 mg/l |
| 17 Feb 2025, 12:50 | 9.8 | 9.8 mg/l |
| 14 Jan 2025, 15:28 | 9.99 | 9.99 mg/l |
| 1 Nov 2024, 12:02 | 9.99 | 9.99 mg/l |
| 15 Oct 2024, 10:12 | 9.59 | 9.59 mg/l |
| 2 Sep 2024, 10:02 | 9.98 | 9.98 mg/l |
| 2 Aug 2024, 13:01 | 9.99 | 9.99 mg/l |
| 2 Jul 2024, 16:28 | 9.89 | 9.89 mg/l |
| 7 Jun 2024, 09:48 | 8.89 | 8.89 mg/l |
| 6 Mar 2024, 11:45 | 8.29 | 8.29 mg/l |
| 8 Jan 2024, 13:36 | 8.54 | 8.54 mg/l |
| 1 Nov 2023, 13:35 | 8.79 | 8.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.02 mg/l
Sampled 1 Sep 2026, 30 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 0.02 | 0.02 mg/l |
| 3 Aug 2026, 14:01 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Jul 2026, 14:09 | 0.019 | 0.019 mg/l |
| 8 Jun 2026, 11:12 | 0.022 | 0.022 mg/l |
| 5 May 2026, 11:42 | 0.019 | 0.019 mg/l |
| 14 Apr 2026, 14:45 | 0.016 | 0.016 mg/l |
| 5 Mar 2026, 14:54 | 0.024 | 0.024 mg/l |
| 4 Feb 2026, 14:10 | 0.039 | 0.039 mg/l |
| 6 Jan 2026, 09:46 | 0.034 | 0.034 mg/l |
| 9 Dec 2025, 13:38 | 0.039 | 0.039 mg/l |
| 21 Nov 2025, 09:59 | 0.039 | 0.039 mg/l |
| 8 Oct 2025, 09:51 | 0.031 | 0.031 mg/l |
| 10 Sep 2025, 11:23 | 0.04 | 0.04 mg/l |
| 7 Aug 2025, 12:22 | 0.042 | 0.042 mg/l |
| 1 Jul 2025, 10:32 | 0.04 | 0.04 mg/l |
| 3 Jun 2025, 12:39 | 0.033 | 0.033 mg/l |
| 12 May 2025, 11:42 | 0.026 | 0.026 mg/l |
| 8 Apr 2025, 13:25 | 0.026 | 0.026 mg/l |
| 3 Mar 2025, 13:58 | 0.058 | 0.058 mg/l |
| 17 Feb 2025, 12:50 | 0.059 | 0.059 mg/l |
| 14 Jan 2025, 15:28 | 0.088 | 0.088 mg/l |
| 1 Nov 2024, 12:02 | 0.11 | 0.11 mg/l |
| 15 Oct 2024, 10:12 | 0.09 | 0.09 mg/l |
| 2 Sep 2024, 10:02 | 0.057 | 0.057 mg/l |
| 2 Aug 2024, 13:01 | 0.093 | 0.093 mg/l |
| 2 Jul 2024, 16:28 | 0.066 | 0.066 mg/l |
| 7 Jun 2024, 09:48 | 0.078 | 0.078 mg/l |
| 20 Mar 2024, 11:20 | 0.047 | 0.047 mg/l |
| 14 Mar 2024, 11:25 | 0.064 | 0.064 mg/l |
| 7 Mar 2024, 14:28 | 0.058 | 0.058 mg/l |
| 6 Mar 2024, 11:45 | 0.056 | 0.056 mg/l |
| 28 Feb 2024, 15:35 | 0.061 | 0.061 mg/l |
| 12 Feb 2024, 16:17 | <0.5 | below 0.5 mg/l (not detected above this) |
| 2 Feb 2024, 16:00 | <0.5 | below 0.5 mg/l (not detected above this) |
| 8 Jan 2024, 13:36 | 0.082 | 0.082 mg/l |
| 1 Nov 2023, 13:35 | 0.077 | 0.077 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
617 µS/cm
Sampled 1 Sep 2026, 30 days ago · 37 results banked
Every result (37)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:30 | 617 | 617 µS/cm |
| 3 Aug 2026, 14:01 | 611 | 611 µS/cm |
| 3 Jul 2026, 14:09 | 609 | 609 µS/cm |
| 8 Jun 2026, 11:12 | 619 | 619 µS/cm |
| 5 May 2026, 11:42 | 604 | 604 µS/cm |
| 14 Apr 2026, 14:45 | 603 | 603 µS/cm |
| 5 Mar 2026, 14:54 | 606 | 606 µS/cm |
| 4 Feb 2026, 14:10 | 602 | 602 µS/cm |
| 6 Jan 2026, 09:46 | 633 | 633 µS/cm |
| 9 Dec 2025, 13:38 | 612 | 612 µS/cm |
| 21 Nov 2025, 09:59 | 643 | 643 µS/cm |
| 8 Oct 2025, 09:51 | 643 | 643 µS/cm |
| 10 Sep 2025, 11:23 | 628 | 628 µS/cm |
| 7 Aug 2025, 12:22 | 626 | 626 µS/cm |
| 1 Jul 2025, 10:32 | 630 | 630 µS/cm |
| 3 Jun 2025, 12:39 | 618 | 618 µS/cm |
| 12 May 2025, 11:42 | 619 | 619 µS/cm |
| 8 Apr 2025, 13:25 | 608 | 608 µS/cm |
| 3 Mar 2025, 13:58 | 606 | 606 µS/cm |
| 17 Feb 2025, 12:50 | 606 | 606 µS/cm |
| 14 Jan 2025, 15:28 | 619 | 619 µS/cm |
| 6 Dec 2024, 10:39 | 611 | 611 µS/cm |
| 1 Nov 2024, 12:02 | 614 | 614 µS/cm |
| 15 Oct 2024, 10:12 | 608 | 608 µS/cm |
| 2 Sep 2024, 10:02 | 603 | 603 µS/cm |
| 2 Aug 2024, 13:01 | 614 | 614 µS/cm |
| 2 Jul 2024, 16:28 | 604 | 604 µS/cm |
| 7 Jun 2024, 09:48 | 616 | 616 µS/cm |
| 20 Mar 2024, 11:20 | 604 | 604 µS/cm |
| 14 Mar 2024, 11:25 | 673 | 673 µS/cm |
| 7 Mar 2024, 14:28 | 604 | 604 µS/cm |
| 6 Mar 2024, 11:45 | 603 | 603 µS/cm |
| 28 Feb 2024, 15:35 | 613 | 613 µS/cm |
| 12 Feb 2024, 16:17 | 608 | 608 µS/cm |
| 2 Feb 2024, 16:00 | 605 | 605 µS/cm |
| 8 Jan 2024, 13:36 | 611 | 611 µS/cm |
| 1 Nov 2023, 13:35 | 590 | 590 µS/cm |
Everything measured here
86 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 86 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 37 | Nov 2023 – Sep 2026 | 131.1% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Nov 2023 – Sep 2026 | 12.9 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 37 | Nov 2023 – Sep 2026 | 16.1 °C 1 Sep 2026 |
| pH 0061 | River water | 40 | Oct 2023 – Sep 2026 | 8.15 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 36 | Nov 2023 – Sep 2026 | below 0.03 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 30 | Nov 2023 – Sep 2026 | 11 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 36 | Nov 2023 – Sep 2026 | 0.02 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 37 | Nov 2023 – Sep 2026 | 617 µS/cm 1 Sep 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Mar 2026 – Mar 2026 | below 0.002 µg/l 5 Mar 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Mar 2026 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Mar 2026 | below 0.004 µg/l 5 Mar 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Mar 2026 – Mar 2026 | below 0.004 µg/l 5 Mar 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Mar 2026 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Mar 2026 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Mar 2026 – Mar 2026 | below 0.01 µg/l 5 Mar 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Mar 2026 – Mar 2026 | below 0.004 µg/l 5 Mar 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Mar 2026 – Mar 2026 | below 0.01 µg/l 5 Mar 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Mar 2026 – Mar 2026 | below 0.004 µg/l 5 Mar 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Mar 2026 – Mar 2026 | below 0.01 µg/l 5 Mar 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Nov 2023 – Sep 2026 | 220 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 34 | Nov 2023 – Sep 2026 | below 0.00085 mg/l 1 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 6 | Feb 2024 – Mar 2024 | below 3 mg/l 20 Mar 2024 |
| Calcium, Dissolved 0239 | River water | 6 | Oct 2023 – Mar 2024 | 110 mg/l 6 Mar 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 6 | Oct 2023 – Mar 2024 | 1.6 mg/l 6 Mar 2024 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 4 | Feb 2024 – Mar 2024 | below 10 mg/l 20 Mar 2024 |
| Chloride 0172 | River water | 6 | Feb 2024 – Mar 2024 | 22 mg/l 20 Mar 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| Lead : BLM Bioavailable 3377 | River water | 6 | Oct 2023 – Mar 2024 | 0.13 µg/l 6 Mar 2024 |
| Lead, Dissolved 0052 | River water | 6 | Oct 2023 – Mar 2024 | 0.2 µg/l 6 Mar 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Mar 2026 | below 0.002 µg/l 5 Mar 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Mar 2026 | below 0.002 µg/l 5 Mar 2026 |
| National Grid Reference : Whole : Field report 7434 | River water | 4 | Feb 2024 – Mar 2024 | 1 unitless value 20 Mar 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 6 | Oct 2023 – Mar 2024 | 0.25 µg/l 6 Mar 2024 |
| Nickel, Dissolved 3410 | River water | 6 | Oct 2023 – Mar 2024 | below 0.5 µg/l 6 Mar 2024 |
| Nitrite as N 0118 | River water | 34 | Nov 2023 – Sep 2026 | 0.01 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 36 | Nov 2023 – Sep 2026 | 11 mg/l 1 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Mar 2026 | below 0.005 µg/l 5 Mar 2026 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Mar 2026 | below 0.002 µg/l 5 Mar 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Mar 2026 | below 0.002 µg/l 5 Mar 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Mar 2026 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Mar 2026 | below 0.0005 µg/l 5 Mar 2026 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Mar 2026 | below 0.006 µg/l 5 Mar 2026 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Mar 2026 | below 0.002 µg/l 5 Mar 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Mar 2026 | below 0.004 µg/l 5 Mar 2026 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Mar 2026 | below 0.001 µg/l 5 Mar 2026 |
| Salinity : In Situ 7608 | River water | 4 | Feb 2024 – Mar 2024 | 0.3 parts per thousand 20 Mar 2024 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Feb 2024 – Mar 2024 | 6.7 mg/l 20 Mar 2024 |
| Visible oil or grease, significant trace: Present/Not found (1/0) 0664 | River water | 4 | Feb 2024 – Mar 2024 | Not found 20 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.