Ayleston Brook Widland
EA name: AYLESTON BROOK WIDLAND
Environment Agency sampling point SW-70910356 · 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
- 13 May 2026, 09:585 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
- 31 since 5 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 267462, 51665As published, to the nearest 1 m. Open in a map
- River, by its own name
- Ayleston Brook
- River, by the map
- Ayleston BrookPlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Planned investigation (local monitoring) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.1%
Sampled 13 May 2026, 5 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 95.1 | 95.1% |
| 16 Apr 2026, 11:12 | 97.7 | 97.7% |
| 2 Mar 2026, 09:00 | 98.9 | 98.9% |
| 11 Feb 2026, 10:02 | 96.7 | 96.7% |
| 20 Jan 2026, 10:52 | 97.4 | 97.4% |
| 11 Dec 2025, 10:42 | 98.3 | 98.3% |
| 21 Nov 2025, 09:46 | 99.5 | 99.5% |
| 23 Oct 2025, 10:25 | 94.6 | 94.6% |
| 18 Sep 2025, 09:54 | 93.9 | 93.9% |
| 21 Aug 2025, 10:05 | 92.7 | 92.7% |
| 24 Jul 2025, 10:18 | 94.4 | 94.4% |
| 19 Jun 2025, 09:54 | 96.4 | 96.4% |
| 2 Jun 2025, 13:13 | 92.2 | 92.2% |
| 9 Apr 2025, 09:11 | 97.7 | 97.7% |
| 14 Mar 2025, 10:03 | 100 | 100% |
| 4 Feb 2025, 10:19 | 98.3 | 98.3% |
| 21 Jan 2025, 12:01 | 101.4 | 101.4% |
| 3 Dec 2024, 09:25 | 102.3 | 102.3% |
| 22 Nov 2024, 10:22 | 97.6 | 97.6% |
| 14 Oct 2024, 11:45 | 97.1 | 97.1% |
| 25 Sep 2024, 14:17 | 92.2 | 92.2% |
| 30 Aug 2024, 11:55 | 95.3 | 95.3% |
| 18 Jul 2024, 11:21 | 94.6 | 94.6% |
| 19 Jun 2024, 13:44 | 92.8 | 92.8% |
| 27 Mar 2024, 15:07 | 98.1 | 98.1% |
| 23 Feb 2024, 11:33 | 97 | 97% |
| 15 Feb 2024, 14:16 | 96.4 | 96.4% |
| 9 Jan 2024, 13:11 | 97.7 | 97.7% |
| 4 Dec 2023, 12:01 | 97 | 97% |
| 3 Nov 2023, 10:37 | 98.8 | 98.8% |
| 5 Oct 2023, 09:20 | 96.5 | 96.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.8 mg/l
Sampled 13 May 2026, 5 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 10.8 | 10.8 mg/l |
| 16 Apr 2026, 11:12 | 10.7 | 10.7 mg/l |
| 2 Mar 2026, 09:00 | 11 | 11 mg/l |
| 11 Feb 2026, 10:02 | 10.8 | 10.8 mg/l |
| 20 Jan 2026, 10:52 | 11.2 | 11.2 mg/l |
| 11 Dec 2025, 10:42 | 10.7 | 10.7 mg/l |
| 21 Nov 2025, 09:46 | 12 | 12 mg/l |
| 23 Oct 2025, 10:25 | 10.3 | 10.3 mg/l |
| 18 Sep 2025, 09:54 | 9.38 | 9.38 mg/l |
| 21 Aug 2025, 10:05 | 9.51 | 9.51 mg/l |
| 24 Jul 2025, 10:18 | 9.47 | 9.47 mg/l |
| 19 Jun 2025, 09:54 | 9.59 | 9.59 mg/l |
| 2 Jun 2025, 13:13 | 9.63 | 9.63 mg/l |
| 9 Apr 2025, 09:11 | 11.7 | 11.7 mg/l |
| 14 Mar 2025, 10:03 | 12.6 | 12.6 mg/l |
| 4 Feb 2025, 10:19 | 11.2 | 11.2 mg/l |
| 21 Jan 2025, 12:01 | 12 | 12 mg/l |
| 3 Dec 2024, 09:25 | 12 | 12 mg/l |
| 22 Nov 2024, 10:22 | 12.1 | 12.1 mg/l |
| 14 Oct 2024, 11:45 | 10.1 | 10.1 mg/l |
| 25 Sep 2024, 14:17 | 9.52 | 9.52 mg/l |
| 30 Aug 2024, 11:55 | 9.88 | 9.88 mg/l |
| 18 Jul 2024, 11:21 | 9.56 | 9.56 mg/l |
| 19 Jun 2024, 13:44 | 9.56 | 9.56 mg/l |
| 27 Mar 2024, 15:07 | 11.2 | 11.2 mg/l |
| 23 Feb 2024, 11:33 | 11.1 | 11.1 mg/l |
| 15 Feb 2024, 14:16 | 10.4 | 10.4 mg/l |
| 9 Jan 2024, 13:11 | 11.8 | 11.8 mg/l |
| 4 Dec 2023, 12:01 | 11 | 11 mg/l |
| 3 Nov 2023, 10:37 | 10.6 | 10.6 mg/l |
| 5 Oct 2023, 09:20 | 9.94 | 9.94 mg/l |
Water temperature
code 0076 · °C
9.8 °C
Sampled 13 May 2026, 5 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 9.8 | 9.8 °C |
| 16 Apr 2026, 11:12 | 11.4 | 11.4 °C |
| 2 Mar 2026, 09:00 | 10.4 | 10.4 °C |
| 11 Feb 2026, 10:02 | 10.2 | 10.2 °C |
| 20 Jan 2026, 10:52 | 9 | 9 °C |
| 11 Dec 2025, 10:42 | 11.5 | 11.5 °C |
| 21 Nov 2025, 09:46 | 7.3 | 7.3 °C |
| 23 Oct 2025, 10:25 | 11.6 | 11.6 °C |
| 18 Sep 2025, 09:54 | 15.3 | 15.3 °C |
| 21 Aug 2025, 10:05 | 14.1 | 14.1 °C |
| 24 Jul 2025, 10:18 | 15.1 | 15.1 °C |
| 19 Jun 2025, 09:54 | 15.5 | 15.5 °C |
| 2 Jun 2025, 13:13 | 13.3 | 13.3 °C |
| 9 Apr 2025, 09:11 | 7.5 | 7.5 °C |
| 14 Mar 2025, 10:03 | 5.5 | 5.5 °C |
| 4 Feb 2025, 10:19 | 9.5 | 9.5 °C |
| 21 Jan 2025, 12:01 | 7.8 | 7.8 °C |
| 3 Dec 2024, 09:25 | 8.2 | 8.2 °C |
| 22 Nov 2024, 10:22 | 6.2 | 6.2 °C |
| 14 Oct 2024, 11:45 | 13.3 | 13.3 °C |
| 25 Sep 2024, 14:17 | 13.8 | 13.8 °C |
| 30 Aug 2024, 11:55 | 13.6 | 13.6 °C |
| 18 Jul 2024, 11:21 | 14.8 | 14.8 °C |
| 19 Jun 2024, 13:44 | 13.9 | 13.9 °C |
| 27 Mar 2024, 15:07 | 9.3 | 9.3 °C |
| 23 Feb 2024, 11:33 | 9.5 | 9.5 °C |
| 15 Feb 2024, 14:16 | 11.8 | 11.8 °C |
| 9 Jan 2024, 13:11 | 7.1 | 7.1 °C |
| 4 Dec 2023, 12:01 | 9.8 | 9.8 °C |
| 3 Nov 2023, 10:37 | 12.2 | 12.2 °C |
| 5 Oct 2023, 09:20 | 13.9 | 13.9 °C |
pH
code 0061
7.9
Sampled 13 May 2026, 5 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 7.9 | 7.9 |
| 16 Apr 2026, 11:12 | 7.61 | 7.61 |
| 2 Mar 2026, 09:00 | 7.71 | 7.71 |
| 11 Feb 2026, 10:02 | 7.65 | 7.65 |
| 20 Jan 2026, 10:52 | 7.73 | 7.73 |
| 11 Dec 2025, 10:42 | 7.59 | 7.59 |
| 21 Nov 2025, 09:46 | 7.68 | 7.68 |
| 23 Oct 2025, 10:25 | 7.39 | 7.39 |
| 18 Sep 2025, 09:54 | 7.61 | 7.61 |
| 21 Aug 2025, 10:05 | 7.5 | 7.5 |
| 24 Jul 2025, 10:18 | 7.8 | 7.8 |
| 19 Jun 2025, 09:54 | 7.74 | 7.74 |
| 2 Jun 2025, 13:13 | 7.68 | 7.68 |
| 9 Apr 2025, 09:11 | 7.71 | 7.71 |
| 14 Mar 2025, 10:03 | 7.86 | 7.86 |
| 4 Feb 2025, 10:19 | 7.63 | 7.63 |
| 21 Jan 2025, 12:01 | 7.61 | 7.61 |
| 3 Dec 2024, 09:25 | 7.84 | 7.84 |
| 22 Nov 2024, 10:22 | 7.29 | 7.29 |
| 14 Oct 2024, 11:45 | 7.22 | 7.22 |
| 25 Sep 2024, 14:17 | 7.52 | 7.52 |
| 30 Aug 2024, 11:55 | 7.79 | 7.79 |
| 18 Jul 2024, 11:21 | 7.9 | 7.9 |
| 19 Jun 2024, 13:44 | 7.7 | 7.7 |
| 27 Mar 2024, 15:07 | 7.64 | 7.64 |
| 23 Feb 2024, 11:33 | 7.46 | 7.46 |
| 15 Feb 2024, 14:16 | 7.4 | 7.4 |
| 9 Jan 2024, 13:11 | 7.58 | 7.58 |
| 4 Dec 2023, 12:01 | 7.46 | 7.46 |
| 3 Nov 2023, 10:37 | 7.37 | 7.37 |
| 5 Oct 2023, 09:20 | 7.6 | 7.6 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 13 May 2026, 5 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 11:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 09:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Feb 2026, 10:02 | 0.044 | 0.044 mg/l |
| 20 Jan 2026, 10:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Dec 2025, 10:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Nov 2025, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Oct 2025, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2025, 09:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Aug 2025, 10:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jul 2025, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2025, 09:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jun 2025, 13:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2025, 09:11 | 0.08 | 0.08 mg/l |
| 14 Mar 2025, 10:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jan 2025, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2024, 09:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Nov 2024, 10:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2024, 11:45 | 0.058 | 0.058 mg/l |
| 25 Sep 2024, 14:17 | 0.031 | 0.031 mg/l |
| 30 Aug 2024, 11:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2024, 11:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 13:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Mar 2024, 15:07 | 0.049 | 0.049 mg/l |
| 23 Feb 2024, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Feb 2024, 14:16 | 0.066 | 0.066 mg/l |
| 9 Jan 2024, 13:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2023, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Nov 2023, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Oct 2023, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.7 mg/l
Sampled 13 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 1.7 | 1.7 mg/l |
| 16 Apr 2026, 11:12 | 1.6 | 1.6 mg/l |
| 2 Mar 2026, 09:00 | 1.9 | 1.9 mg/l |
| 11 Feb 2026, 10:02 | 1.89 | 1.89 mg/l |
| 20 Jan 2026, 10:52 | 2.2 | 2.2 mg/l |
| 11 Dec 2025, 10:42 | 2.4 | 2.4 mg/l |
| 21 Nov 2025, 09:46 | 2.1 | 2.1 mg/l |
| 23 Oct 2025, 10:25 | 1.4 | 1.4 mg/l |
| 18 Sep 2025, 09:54 | 1.19 | 1.19 mg/l |
| 21 Aug 2025, 10:05 | 10 | 10 mg/l |
| 24 Jul 2025, 10:18 | 3.1 | 3.1 mg/l |
| 19 Jun 2025, 09:54 | 1.9 | 1.9 mg/l |
| 2 Jun 2025, 13:13 | 2.19 | 2.19 mg/l |
| 9 Apr 2025, 09:11 | 2.25 | 2.25 mg/l |
| 14 Mar 2025, 10:03 | 2.1 | 2.1 mg/l |
| 4 Feb 2025, 10:19 | 2.3 | 2.3 mg/l |
| 21 Jan 2025, 12:01 | 2.3 | 2.3 mg/l |
| 22 Nov 2024, 10:22 | 2.3 | 2.3 mg/l |
| 14 Oct 2024, 11:45 | 2.09 | 2.09 mg/l |
| 25 Sep 2024, 14:17 | 1.89 | 1.89 mg/l |
| 30 Aug 2024, 11:55 | 3 | 3 mg/l |
| 18 Jul 2024, 11:21 | 1.7 | 1.7 mg/l |
| 19 Jun 2024, 13:44 | 2.1 | 2.1 mg/l |
| 27 Mar 2024, 15:07 | 2.2 | 2.2 mg/l |
| 23 Feb 2024, 11:33 | 3 | 3 mg/l |
| 15 Feb 2024, 14:16 | 1.9 | 1.9 mg/l |
| 9 Jan 2024, 13:11 | 3.6 | 3.6 mg/l |
| 4 Dec 2023, 12:01 | 2 | 2 mg/l |
| 3 Nov 2023, 10:37 | 4.09 | 4.09 mg/l |
| 5 Oct 2023, 09:20 | 2.09 | 2.09 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.15 mg/l
Sampled 13 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 0.15 | 0.15 mg/l |
| 16 Apr 2026, 11:12 | 0.091 | 0.091 mg/l |
| 2 Mar 2026, 09:00 | 0.031 | 0.031 mg/l |
| 11 Feb 2026, 10:02 | 0.037 | 0.037 mg/l |
| 20 Jan 2026, 10:52 | 0.032 | 0.032 mg/l |
| 11 Dec 2025, 10:42 | 0.041 | 0.041 mg/l |
| 21 Nov 2025, 09:46 | 0.031 | 0.031 mg/l |
| 23 Oct 2025, 10:25 | 0.11 | 0.11 mg/l |
| 18 Sep 2025, 09:54 | 0.076 | 0.076 mg/l |
| 21 Aug 2025, 10:05 | 1.2 | 1.2 mg/l |
| 24 Jul 2025, 10:18 | 0.32 | 0.32 mg/l |
| 19 Jun 2025, 09:54 | 0.096 | 0.096 mg/l |
| 2 Jun 2025, 13:13 | 0.17 | 0.17 mg/l |
| 9 Apr 2025, 09:11 | 0.091 | 0.091 mg/l |
| 14 Mar 2025, 10:03 | 0.029 | 0.029 mg/l |
| 4 Feb 2025, 10:19 | 0.033 | 0.033 mg/l |
| 21 Jan 2025, 12:01 | 0.028 | 0.028 mg/l |
| 22 Nov 2024, 10:22 | 0.058 | 0.058 mg/l |
| 14 Oct 2024, 11:45 | 0.064 | 0.064 mg/l |
| 25 Sep 2024, 14:17 | 0.14 | 0.14 mg/l |
| 30 Aug 2024, 11:55 | 0.42 | 0.42 mg/l |
| 18 Jul 2024, 11:21 | 0.14 | 0.14 mg/l |
| 19 Jun 2024, 13:44 | 0.14 | 0.14 mg/l |
| 27 Mar 2024, 15:07 | 0.024 | 0.024 mg/l |
| 23 Feb 2024, 11:33 | 0.029 | 0.029 mg/l |
| 15 Feb 2024, 14:16 | 0.032 | 0.032 mg/l |
| 9 Jan 2024, 13:11 | 0.022 | 0.022 mg/l |
| 4 Dec 2023, 12:01 | 0.05 | 0.05 mg/l |
| 3 Nov 2023, 10:37 | 0.027 | 0.027 mg/l |
| 5 Oct 2023, 09:20 | 0.054 | 0.054 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
236 µS/cm
Sampled 13 May 2026, 5 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 May 2026, 09:58 | 236 | 236 µS/cm |
| 16 Apr 2026, 11:12 | 238 | 238 µS/cm |
| 2 Mar 2026, 09:00 | 205 | 205 µS/cm |
| 11 Feb 2026, 10:02 | 187 | 187 µS/cm |
| 20 Jan 2026, 10:52 | 215 | 215 µS/cm |
| 11 Dec 2025, 10:42 | 217 | 217 µS/cm |
| 21 Nov 2025, 09:46 | 222 | 222 µS/cm |
| 23 Oct 2025, 10:25 | 202 | 202 µS/cm |
| 18 Sep 2025, 09:54 | 228 | 228 µS/cm |
| 21 Aug 2025, 10:05 | 318 | 318 µS/cm |
| 24 Jul 2025, 10:18 | 261 | 261 µS/cm |
| 19 Jun 2025, 09:54 | 247 | 247 µS/cm |
| 2 Jun 2025, 13:13 | 250 | 250 µS/cm |
| 9 Apr 2025, 09:11 | 247 | 247 µS/cm |
| 14 Mar 2025, 10:03 | 227 | 227 µS/cm |
| 4 Feb 2025, 10:19 | 218 | 218 µS/cm |
| 21 Jan 2025, 12:01 | 228 | 228 µS/cm |
| 3 Dec 2024, 09:25 | 220 | 220 µS/cm |
| 22 Nov 2024, 10:22 | 220 | 220 µS/cm |
| 14 Oct 2024, 11:45 | 202 | 202 µS/cm |
| 25 Sep 2024, 14:17 | 235 | 235 µS/cm |
| 30 Aug 2024, 11:55 | 266 | 266 µS/cm |
| 18 Jul 2024, 11:21 | 248 | 248 µS/cm |
| 19 Jun 2024, 13:44 | 243 | 243 µS/cm |
| 27 Mar 2024, 15:07 | 204 | 204 µS/cm |
| 23 Feb 2024, 11:33 | 213 | 213 µS/cm |
| 15 Feb 2024, 14:16 | 185 | 185 µS/cm |
| 9 Jan 2024, 13:11 | 235 | 235 µS/cm |
| 4 Dec 2023, 12:01 | 181 | 181 µS/cm |
| 3 Nov 2023, 10:37 | 221 | 221 µS/cm |
| 5 Oct 2023, 09:20 | 233 | 233 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 31 | Oct 2023 – May 2026 | 95.1% 13 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Oct 2023 – May 2026 | 10.8 mg/l 13 May 2026 |
| Temperature of Water 0076 | River water | 31 | Oct 2023 – May 2026 | 9.8 °C 13 May 2026 |
| pH 0061 | River water | 31 | Oct 2023 – May 2026 | 7.9 13 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Oct 2023 – May 2026 | below 0.03 mg/l 13 May 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – May 2026 | 1.7 mg/l 13 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Oct 2023 – May 2026 | 0.15 mg/l 13 May 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Oct 2023 – May 2026 | 236 µS/cm 13 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 31 | Oct 2023 – May 2026 | 69 mg/l 13 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Oct 2023 – May 2026 | below 0.00043 mg/l 13 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | below 1 mg/l 13 May 2026 |
| Nitrite as N 0118 | River water | 31 | Oct 2023 – May 2026 | below 0.004 mg/l 13 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Oct 2023 – May 2026 | 1.7 mg/l 13 May 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.