Sancreed Brook at Sellan Bridge
EA name: SANCREED BROOK AT SELLAN BRIDGE
Environment Agency sampling point SW-82112424 · 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, 14:474 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 18 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 142740, 29871As published, to the nearest 1 m. Open in a map
- River, by its own name
- Sancreed Brook
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 12 m from the line.
- Next gauge downstream
- Newlyn Coombe On the Newlyn Coombe River · 5.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (31 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.2%
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 95.2 | 95.2% |
| 13 May 2026, 10:54 | 97.9 | 97.9% |
| 29 Apr 2026, 13:04 | 101.1 | 101.1% |
| 9 Apr 2026, 13:46 | 99.8 | 99.8% |
| 20 Mar 2026, 10:40 | 99.1 | 99.1% |
| 17 Feb 2026, 11:26 | 97 | 97% |
| 2 Feb 2026, 11:44 | 99.1 | 99.1% |
| 27 Jan 2026, 12:39 | 96.4 | 96.4% |
| 2 Jan 2026, 13:35 | 96.9 | 96.9% |
| 15 Dec 2025, 10:46 | 95.2 | 95.2% |
| 1 Dec 2025, 14:19 | 96.2 | 96.2% |
| 17 Nov 2025, 14:05 | 96.7 | 96.7% |
| 4 Nov 2025, 11:38 | 94.3 | 94.3% |
| 3 Mar 2025, 11:45 | 97.8 | 97.8% |
| 11 Feb 2025, 10:26 | 99.7 | 99.7% |
| 20 Jan 2025, 12:03 | 97.5 | 97.5% |
| 4 Dec 2024, 11:02 | 98.1 | 98.1% |
| 18 Nov 2024, 13:45 | 97.2 | 97.2% |
| 17 Oct 2024, 12:52 | 96.5 | 96.5% |
| 23 Sep 2024, 10:28 | 89.2 | 89.2% |
| 16 Jul 2024, 10:58 | 97.7 | 97.7% |
| 17 Jun 2024, 12:41 | 98 | 98% |
| 13 May 2024, 09:17 | 97.6 | 97.6% |
| 22 Apr 2024, 10:25 | 100.4 | 100.4% |
| 19 Mar 2024, 12:22 | 98.2 | 98.2% |
| 22 Feb 2024, 11:51 | 96.5 | 96.5% |
| 30 Jan 2024, 11:16 | 98.5 | 98.5% |
| 15 Jan 2024, 12:55 | 99.5 | 99.5% |
| 4 Dec 2023, 12:04 | 98 | 98% |
| 20 Nov 2023, 12:02 | 97.3 | 97.3% |
| 18 Oct 2023, 09:38 | 96.6 | 96.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.4 mg/l
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 10.4 | 10.4 mg/l |
| 13 May 2026, 10:54 | 10.6 | 10.6 mg/l |
| 29 Apr 2026, 13:04 | 10.9 | 10.9 mg/l |
| 9 Apr 2026, 13:46 | 10.8 | 10.8 mg/l |
| 20 Mar 2026, 10:40 | 11.1 | 11.1 mg/l |
| 17 Feb 2026, 11:26 | 11.1 | 11.1 mg/l |
| 2 Feb 2026, 11:44 | 11.4 | 11.4 mg/l |
| 27 Jan 2026, 12:39 | 11.1 | 11.1 mg/l |
| 2 Jan 2026, 13:35 | 11.2 | 11.2 mg/l |
| 15 Dec 2025, 10:46 | 10.5 | 10.5 mg/l |
| 1 Dec 2025, 14:19 | 10.4 | 10.4 mg/l |
| 17 Nov 2025, 14:05 | 10.5 | 10.5 mg/l |
| 4 Nov 2025, 11:38 | 9.91 | 9.91 mg/l |
| 3 Mar 2025, 11:45 | 11.3 | 11.3 mg/l |
| 11 Feb 2025, 10:26 | 11.9 | 11.9 mg/l |
| 20 Jan 2025, 12:03 | 11.3 | 11.3 mg/l |
| 4 Dec 2024, 11:02 | 10.8 | 10.8 mg/l |
| 18 Nov 2024, 13:45 | 10.5 | 10.5 mg/l |
| 17 Oct 2024, 12:52 | 10 | 10 mg/l |
| 23 Sep 2024, 10:28 | 9.15 | 9.15 mg/l |
| 16 Jul 2024, 10:58 | 10 | 10 mg/l |
| 17 Jun 2024, 12:41 | 10.4 | 10.4 mg/l |
| 13 May 2024, 09:17 | 10.4 | 10.4 mg/l |
| 22 Apr 2024, 10:25 | 11.1 | 11.1 mg/l |
| 19 Mar 2024, 12:22 | 10.6 | 10.6 mg/l |
| 22 Feb 2024, 11:51 | 11 | 11 mg/l |
| 30 Jan 2024, 11:16 | 11.4 | 11.4 mg/l |
| 15 Jan 2024, 12:55 | 11.4 | 11.4 mg/l |
| 4 Dec 2023, 12:04 | 11.3 | 11.3 mg/l |
| 20 Nov 2023, 12:02 | 10.4 | 10.4 mg/l |
| 18 Oct 2023, 09:38 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
11.3 °C
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 11.3 | 11.3 °C |
| 13 May 2026, 10:54 | 11.5 | 11.5 °C |
| 29 Apr 2026, 13:04 | 12 | 12 °C |
| 9 Apr 2026, 13:46 | 11.8 | 11.8 °C |
| 20 Mar 2026, 10:40 | 10.3 | 10.3 °C |
| 17 Feb 2026, 11:26 | 9.5 | 9.5 °C |
| 2 Feb 2026, 11:44 | 9.3 | 9.3 °C |
| 27 Jan 2026, 12:39 | 9.2 | 9.2 °C |
| 2 Jan 2026, 13:35 | 8.8 | 8.8 °C |
| 15 Dec 2025, 10:46 | 10.7 | 10.7 °C |
| 1 Dec 2025, 14:19 | 11.8 | 11.8 °C |
| 17 Nov 2025, 14:05 | 11.5 | 11.5 °C |
| 4 Nov 2025, 11:38 | 13 | 13 °C |
| 3 Mar 2025, 11:45 | 8.9 | 8.9 °C |
| 11 Feb 2025, 10:26 | 7.7 | 7.7 °C |
| 20 Jan 2025, 12:03 | 8.7 | 8.7 °C |
| 4 Dec 2024, 11:02 | 11 | 11 °C |
| 18 Nov 2024, 13:45 | 11.8 | 11.8 °C |
| 17 Oct 2024, 12:52 | 13.5 | 13.5 °C |
| 23 Sep 2024, 10:28 | 14.1 | 14.1 °C |
| 16 Jul 2024, 10:58 | 14.2 | 14.2 °C |
| 17 Jun 2024, 12:41 | 12.7 | 12.7 °C |
| 13 May 2024, 09:17 | 12.6 | 12.6 °C |
| 22 Apr 2024, 10:25 | 10.9 | 10.9 °C |
| 19 Mar 2024, 12:22 | 12 | 12 °C |
| 22 Feb 2024, 11:51 | 9.7 | 9.7 °C |
| 30 Jan 2024, 11:16 | 8.8 | 8.8 °C |
| 15 Jan 2024, 12:55 | 9.2 | 9.2 °C |
| 4 Dec 2023, 12:04 | 9.2 | 9.2 °C |
| 20 Nov 2023, 12:02 | 12.1 | 12.1 °C |
| 18 Oct 2023, 09:38 | 13.6 | 13.6 °C |
pH
code 0061
6.71
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 6.71 | 6.71 |
| 13 May 2026, 10:54 | 6.77 | 6.77 |
| 29 Apr 2026, 13:04 | 6.62 | 6.62 |
| 9 Apr 2026, 13:46 | 7.11 | 7.11 |
| 20 Mar 2026, 10:40 | 6.77 | 6.77 |
| 17 Feb 2026, 11:26 | 6.55 | 6.55 |
| 2 Feb 2026, 11:44 | 6.58 | 6.58 |
| 27 Jan 2026, 12:39 | 6.51 | 6.51 |
| 2 Jan 2026, 13:35 | 6.58 | 6.58 |
| 15 Dec 2025, 10:46 | 6.57 | 6.57 |
| 1 Dec 2025, 14:19 | 6.65 | 6.65 |
| 17 Nov 2025, 14:05 | 6.51 | 6.51 |
| 4 Nov 2025, 11:38 | 6.74 | 6.74 |
| 3 Mar 2025, 11:45 | 6.49 | 6.49 |
| 11 Feb 2025, 10:26 | 6.69 | 6.69 |
| 20 Jan 2025, 12:03 | 6.62 | 6.62 |
| 4 Dec 2024, 11:02 | 6.66 | 6.66 |
| 18 Nov 2024, 13:45 | 6.66 | 6.66 |
| 17 Oct 2024, 12:52 | 6.43 | 6.43 |
| 23 Sep 2024, 10:28 | 6.7 | 6.7 |
| 16 Jul 2024, 10:58 | 6.56 | 6.56 |
| 17 Jun 2024, 12:41 | 6.55 | 6.55 |
| 13 May 2024, 09:17 | 6.77 | 6.77 |
| 22 Apr 2024, 10:25 | 6.56 | 6.56 |
| 19 Mar 2024, 12:22 | 6.55 | 6.55 |
| 22 Feb 2024, 11:51 | 6.44 | 6.44 |
| 30 Jan 2024, 11:16 | 6.79 | 6.79 |
| 15 Jan 2024, 12:55 | 6.5 | 6.5 |
| 4 Dec 2023, 12:04 | 7.06 | 7.06 |
| 20 Nov 2023, 12:02 | 6.3 | 6.3 |
| 18 Oct 2023, 09:38 | 6.4 | 6.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.074 mg/l
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 0.074 | 0.074 mg/l |
| 13 May 2026, 10:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Apr 2026, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2026, 13:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Mar 2026, 10:40 | 0.097 | 0.097 mg/l |
| 17 Feb 2026, 11:26 | 0.14 | 0.14 mg/l |
| 2 Feb 2026, 11:44 | 0.27 | 0.27 mg/l |
| 27 Jan 2026, 12:39 | 0.3 | 0.3 mg/l |
| 2 Jan 2026, 13:35 | 0.04 | 0.04 mg/l |
| 15 Dec 2025, 10:46 | 0.81 | 0.81 mg/l |
| 1 Dec 2025, 14:19 | 0.43 | 0.43 mg/l |
| 17 Nov 2025, 14:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2025, 11:38 | 0.49 | 0.49 mg/l |
| 3 Mar 2025, 11:45 | 0.033 | 0.033 mg/l |
| 11 Feb 2025, 10:26 | 0.042 | 0.042 mg/l |
| 20 Jan 2025, 12:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2024, 11:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 13:45 | 0.032 | 0.032 mg/l |
| 17 Oct 2024, 12:52 | 0.12 | 0.12 mg/l |
| 23 Sep 2024, 10:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 10:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 12:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2024, 09:17 | 0.22 | 0.22 mg/l |
| 22 Apr 2024, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2024, 12:22 | 0.038 | 0.038 mg/l |
| 22 Feb 2024, 11:51 | 0.11 | 0.11 mg/l |
| 30 Jan 2024, 11:16 | 0.074 | 0.074 mg/l |
| 15 Jan 2024, 12:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2023, 12:04 | 0.045 | 0.045 mg/l |
| 20 Nov 2023, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Oct 2023, 09:38 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.2 mg/l
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 3.2 | 3.2 mg/l |
| 13 May 2026, 10:54 | 3.3 | 3.3 mg/l |
| 29 Apr 2026, 13:04 | 3.4 | 3.4 mg/l |
| 9 Apr 2026, 13:46 | 3.6 | 3.6 mg/l |
| 20 Mar 2026, 10:40 | 3.99 | 3.99 mg/l |
| 17 Feb 2026, 11:26 | 4.47 | 4.47 mg/l |
| 2 Feb 2026, 11:44 | 4.97 | 4.97 mg/l |
| 27 Jan 2026, 12:39 | 4.18 | 4.18 mg/l |
| 2 Jan 2026, 13:35 | 5.39 | 5.39 mg/l |
| 15 Dec 2025, 10:46 | 3.78 | 3.78 mg/l |
| 1 Dec 2025, 14:19 | 4.48 | 4.48 mg/l |
| 17 Nov 2025, 14:05 | 6.39 | 6.39 mg/l |
| 4 Nov 2025, 11:38 | 2.99 | 2.99 mg/l |
| 3 Mar 2025, 11:45 | 4.6 | 4.6 mg/l |
| 11 Feb 2025, 10:26 | 4.5 | 4.5 mg/l |
| 20 Jan 2025, 12:03 | 4.5 | 4.5 mg/l |
| 4 Dec 2024, 11:02 | 4.39 | 4.39 mg/l |
| 18 Nov 2024, 13:45 | 3.9 | 3.9 mg/l |
| 17 Oct 2024, 12:52 | 3.98 | 3.98 mg/l |
| 23 Sep 2024, 10:28 | 3.1 | 3.1 mg/l |
| 16 Jul 2024, 10:58 | 3.2 | 3.2 mg/l |
| 17 Jun 2024, 12:41 | 3.5 | 3.5 mg/l |
| 13 May 2024, 09:17 | 2.79 | 2.79 mg/l |
| 22 Apr 2024, 10:25 | 4.1 | 4.1 mg/l |
| 19 Mar 2024, 12:22 | 4.09 | 4.09 mg/l |
| 22 Feb 2024, 11:51 | 3.89 | 3.89 mg/l |
| 30 Jan 2024, 11:16 | 4.4 | 4.4 mg/l |
| 15 Jan 2024, 12:55 | 5 | 5 mg/l |
| 4 Dec 2023, 12:04 | 4.09 | 4.09 mg/l |
| 20 Nov 2023, 12:02 | 4.79 | 4.79 mg/l |
| 18 Oct 2023, 09:38 | 3.8 | 3.8 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.034 mg/l
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 0.034 | 0.034 mg/l |
| 13 May 2026, 10:54 | 0.012 | 0.012 mg/l |
| 29 Apr 2026, 13:04 | 0.012 | 0.012 mg/l |
| 9 Apr 2026, 13:46 | 0.012 | 0.012 mg/l |
| 20 Mar 2026, 10:40 | 0.027 | 0.027 mg/l |
| 17 Feb 2026, 11:26 | 0.032 | 0.032 mg/l |
| 2 Feb 2026, 11:44 | 0.036 | 0.036 mg/l |
| 27 Jan 2026, 12:39 | 0.036 | 0.036 mg/l |
| 2 Jan 2026, 13:35 | 0.02 | 0.02 mg/l |
| 15 Dec 2025, 10:46 | 0.13 | 0.13 mg/l |
| 1 Dec 2025, 14:19 | 0.062 | 0.062 mg/l |
| 17 Nov 2025, 14:05 | 0.016 | 0.016 mg/l |
| 4 Nov 2025, 11:38 | 0.1 | 0.1 mg/l |
| 3 Mar 2025, 11:45 | 0.011 | 0.011 mg/l |
| 11 Feb 2025, 10:26 | 0.016 | 0.016 mg/l |
| 20 Jan 2025, 12:03 | 0.015 | 0.015 mg/l |
| 4 Dec 2024, 11:02 | 0.014 | 0.014 mg/l |
| 18 Nov 2024, 13:45 | 0.037 | 0.037 mg/l |
| 17 Oct 2024, 12:52 | 0.037 | 0.037 mg/l |
| 23 Sep 2024, 10:28 | 0.024 | 0.024 mg/l |
| 16 Jul 2024, 10:58 | 0.029 | 0.029 mg/l |
| 17 Jun 2024, 12:41 | 0.025 | 0.025 mg/l |
| 13 May 2024, 09:17 | 0.061 | 0.061 mg/l |
| 22 Apr 2024, 10:25 | 0.016 | 0.016 mg/l |
| 19 Mar 2024, 12:22 | 0.023 | 0.023 mg/l |
| 22 Feb 2024, 11:51 | 0.042 | 0.042 mg/l |
| 30 Jan 2024, 11:16 | 0.032 | 0.032 mg/l |
| 15 Jan 2024, 12:55 | 0.018 | 0.018 mg/l |
| 4 Dec 2023, 12:04 | 0.032 | 0.032 mg/l |
| 20 Nov 2023, 12:02 | 0.017 | 0.017 mg/l |
| 18 Oct 2023, 09:38 | 0.025 | 0.025 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
197 µS/cm
Sampled 18 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 14:47 | 197 | 197 µS/cm |
| 13 May 2026, 10:54 | 193 | 193 µS/cm |
| 29 Apr 2026, 13:04 | 194 | 194 µS/cm |
| 9 Apr 2026, 13:46 | 193 | 193 µS/cm |
| 20 Mar 2026, 10:40 | 200 | 200 µS/cm |
| 17 Feb 2026, 11:26 | 212 | 212 µS/cm |
| 2 Feb 2026, 11:44 | 225 | 225 µS/cm |
| 27 Jan 2026, 12:39 | 222 | 222 µS/cm |
| 2 Jan 2026, 13:35 | 219 | 219 µS/cm |
| 15 Dec 2025, 10:46 | 201 | 201 µS/cm |
| 1 Dec 2025, 14:19 | 221 | 221 µS/cm |
| 17 Nov 2025, 14:05 | 237 | 237 µS/cm |
| 4 Nov 2025, 11:38 | 216 | 216 µS/cm |
| 3 Mar 2025, 11:45 | 207 | 207 µS/cm |
| 11 Feb 2025, 10:26 | 207 | 207 µS/cm |
| 20 Jan 2025, 12:03 | 209 | 209 µS/cm |
| 4 Dec 2024, 11:02 | 210 | 210 µS/cm |
| 18 Nov 2024, 13:45 | 204 | 204 µS/cm |
| 17 Oct 2024, 12:52 | 210 | 210 µS/cm |
| 23 Sep 2024, 10:28 | 209 | 209 µS/cm |
| 16 Jul 2024, 10:58 | 202 | 202 µS/cm |
| 17 Jun 2024, 12:41 | 200 | 200 µS/cm |
| 13 May 2024, 09:17 | 180 | 180 µS/cm |
| 22 Apr 2024, 10:25 | 203 | 203 µS/cm |
| 19 Mar 2024, 12:22 | 207 | 207 µS/cm |
| 22 Feb 2024, 11:51 | 204 | 204 µS/cm |
| 30 Jan 2024, 11:16 | 217 | 217 µS/cm |
| 15 Jan 2024, 12:55 | 118 | 118 µS/cm |
| 4 Dec 2023, 12:04 | 213 | 213 µS/cm |
| 20 Nov 2023, 12:02 | 227 | 227 µS/cm |
| 18 Oct 2023, 09:38 | 222 | 222 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 31 | Oct 2023 – May 2026 | 95.2% 18 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Oct 2023 – May 2026 | 10.4 mg/l 18 May 2026 |
| Temperature of Water 0076 | River water | 31 | Oct 2023 – May 2026 | 11.3 °C 18 May 2026 |
| pH 0061 | River water | 31 | Oct 2023 – May 2026 | 6.71 18 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Oct 2023 – May 2026 | 0.074 mg/l 18 May 2026 |
| Nitrate as N 0117 | River water | 31 | Oct 2023 – May 2026 | 3.2 mg/l 18 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Oct 2023 – May 2026 | 0.034 mg/l 18 May 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Oct 2023 – May 2026 | 197 µS/cm 18 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 31 | Oct 2023 – May 2026 | 17 mg/l 18 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Oct 2023 – May 2026 | 0.00008 mg/l 18 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 25 | Feb 2024 – May 2026 | below 1 mg/l 18 May 2026 |
| Nitrite as N 0118 | River water | 31 | Oct 2023 – May 2026 | below 0.004 mg/l 18 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 31 | Oct 2023 – May 2026 | 3.2 mg/l 18 May 2026 |
| Phosphorus, Total as P 0348 | River water | 23 | May 2024 – May 2026 | 0.026 mg/l 18 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.