Cowbridge Beck 200 m downstream of Billingham sewage treatment works
EA name: COWBRIDGE BECK 200M D/S BILLINGHAM STW
Environment Agency sampling point NE-45400487 · 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
- 16 Mar 2026, 11:187 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 19 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 448357, 525675As published, to the nearest 1 m. Open in a map
- River, by its own name
- Cowbridge Beck
- River, by the map
- Cowbridge BeckPlaced on the river its name gives, 4 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) (31 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
43%
Sampled 16 Mar 2026, 7 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 43 | 43% |
| 6 Feb 2026, 08:24 | 83.5 | 83.5% |
| 7 Jan 2026, 11:48 | 98.9 | 98.9% |
| 3 Dec 2025, 10:31 | 77.1 | 77.1% |
| 10 Nov 2025, 10:51 | 12 | 12% |
| 21 Oct 2025, 11:09 | 69.3 | 69.3% |
| 23 Sep 2025, 11:59 | 27 | 27% |
| 15 Aug 2025, 13:55 | 23.1 | 23.1% |
| 22 Jul 2025, 11:05 | 21.6 | 21.6% |
| 5 Jun 2025, 11:34 | 37.2 | 37.2% |
| 8 May 2025, 08:20 | 52.7 | 52.7% |
| 10 Apr 2025, 09:19 | 45.7 | 45.7% |
| 6 Mar 2025, 09:01 | 90.3 | 90.3% |
| 4 Feb 2025, 08:28 | 87.5 | 87.5% |
| 21 Jan 2025, 11:17 | 79.3 | 79.3% |
| 3 Dec 2024, 09:12 | 79 | 79% |
| 21 Nov 2024, 10:35 | 59.1 | 59.1% |
| 24 Oct 2024, 08:50 | 55.5 | 55.5% |
| 17 Sep 2024, 10:19 | 58.8 | 58.8% |
| 21 Aug 2024, 08:29 | 68 | 68% |
| 24 Jul 2024, 10:28 | 68.7 | 68.7% |
| 18 Jun 2024, 10:59 | 53.3 | 53.3% |
| 14 May 2024, 10:41 | 50.8 | 50.8% |
| 15 Apr 2024, 10:28 | 73.3 | 73.3% |
| 18 Mar 2024, 08:44 | 65.6 | 65.6% |
| 21 Feb 2024, 11:28 | 99.3 | 99.3% |
| 16 Jan 2024, 11:06 | 70.1 | 70.1% |
| 12 Dec 2023, 11:52 | 89.7 | 89.7% |
| 29 Nov 2023, 08:23 | 75.1 | 75.1% |
| 24 Nov 2023, 10:59 | 24.1 | 24.1% |
| 19 Oct 2023, 13:29 | 65.7 | 65.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.43 mg/l
Sampled 16 Mar 2026, 7 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 5.43 | 5.43 mg/l |
| 6 Feb 2026, 08:24 | 10.6 | 10.6 mg/l |
| 7 Jan 2026, 11:48 | 11.8 | 11.8 mg/l |
| 3 Dec 2025, 10:31 | 9.77 | 9.77 mg/l |
| 10 Nov 2025, 10:51 | 1.37 | 1.37 mg/l |
| 21 Oct 2025, 11:09 | 7.71 | 7.71 mg/l |
| 23 Sep 2025, 11:59 | 3.12 | 3.12 mg/l |
| 15 Aug 2025, 13:55 | 2.21 | 2.21 mg/l |
| 22 Jul 2025, 11:05 | 2.15 | 2.15 mg/l |
| 5 Jun 2025, 11:34 | 3.89 | 3.89 mg/l |
| 8 May 2025, 08:20 | 5.94 | 5.94 mg/l |
| 10 Apr 2025, 09:19 | 5.6 | 5.6 mg/l |
| 6 Mar 2025, 09:01 | 11.6 | 11.6 mg/l |
| 4 Feb 2025, 08:28 | 11.1 | 11.1 mg/l |
| 21 Jan 2025, 11:17 | 10.7 | 10.7 mg/l |
| 3 Dec 2024, 09:12 | 10.2 | 10.2 mg/l |
| 21 Nov 2024, 10:35 | 7.94 | 7.94 mg/l |
| 24 Oct 2024, 08:50 | 6.42 | 6.42 mg/l |
| 17 Sep 2024, 10:19 | 6.82 | 6.82 mg/l |
| 21 Aug 2024, 08:29 | 7.07 | 7.07 mg/l |
| 24 Jul 2024, 10:28 | 6.72 | 6.72 mg/l |
| 18 Jun 2024, 10:59 | 5.54 | 5.54 mg/l |
| 14 May 2024, 10:41 | 5.29 | 5.29 mg/l |
| 15 Apr 2024, 10:28 | 8.54 | 8.54 mg/l |
| 18 Mar 2024, 08:44 | 7.7 | 7.7 mg/l |
| 21 Feb 2024, 11:28 | 11.5 | 11.5 mg/l |
| 16 Jan 2024, 11:06 | 9.25 | 9.25 mg/l |
| 12 Dec 2023, 11:52 | 10.8 | 10.8 mg/l |
| 29 Nov 2023, 08:23 | 9.8 | 9.8 mg/l |
| 24 Nov 2023, 10:59 | 2.91 | 2.91 mg/l |
| 19 Oct 2023, 13:29 | 7 | 7 mg/l |
Water temperature
code 0076 · °C
5.3 °C
Sampled 16 Mar 2026, 7 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 5.3 | 5.3 °C |
| 6 Feb 2026, 08:24 | 5.1 | 5.1 °C |
| 7 Jan 2026, 11:48 | 3.1 | 3.1 °C |
| 3 Dec 2025, 10:31 | 5.1 | 5.1 °C |
| 10 Nov 2025, 10:51 | 9.2 | 9.2 °C |
| 21 Oct 2025, 11:09 | 10.4 | 10.4 °C |
| 23 Sep 2025, 11:59 | 8.8 | 8.8 °C |
| 15 Aug 2025, 13:55 | 17.2 | 17.2 °C |
| 22 Jul 2025, 11:05 | 15.4 | 15.4 °C |
| 5 Jun 2025, 11:34 | 13.1 | 13.1 °C |
| 8 May 2025, 08:20 | 9.8 | 9.8 °C |
| 10 Apr 2025, 09:19 | 6.4 | 6.4 °C |
| 6 Mar 2025, 09:01 | 4.8 | 4.8 °C |
| 4 Feb 2025, 08:28 | 5.1 | 5.1 °C |
| 21 Jan 2025, 11:17 | 2.9 | 2.9 °C |
| 3 Dec 2024, 09:12 | 4.4 | 4.4 °C |
| 21 Nov 2024, 10:35 | 3 | 3 °C |
| 24 Oct 2024, 08:50 | 8.9 | 8.9 °C |
| 17 Sep 2024, 10:19 | 8.8 | 8.8 °C |
| 21 Aug 2024, 08:29 | 13.5 | 13.5 °C |
| 24 Jul 2024, 10:28 | 16.3 | 16.3 °C |
| 18 Jun 2024, 10:59 | 13.5 | 13.5 °C |
| 14 May 2024, 10:41 | 13.4 | 13.4 °C |
| 15 Apr 2024, 10:28 | 8.6 | 8.6 °C |
| 18 Mar 2024, 08:44 | 8.2 | 8.2 °C |
| 21 Feb 2024, 11:28 | 8.6 | 8.6 °C |
| 16 Jan 2024, 11:06 | 3.6 | 3.6 °C |
| 12 Dec 2023, 11:52 | 7 | 7 °C |
| 29 Nov 2023, 08:23 | 4 | 4 °C |
| 24 Nov 2023, 10:59 | 7.1 | 7.1 °C |
| 19 Oct 2023, 13:29 | 12.3 | 12.3 °C |
pH
code 0061
7.25
Sampled 16 Mar 2026, 7 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 7.25 | 7.25 |
| 6 Feb 2026, 08:24 | 7.85 | 7.85 |
| 7 Jan 2026, 11:48 | 7.84 | 7.84 |
| 3 Dec 2025, 10:31 | 7.67 | 7.67 |
| 10 Nov 2025, 10:51 | 7.35 | 7.35 |
| 21 Oct 2025, 11:09 | 7.28 | 7.28 |
| 23 Sep 2025, 11:59 | 7.61 | 7.61 |
| 15 Aug 2025, 13:55 | 7.35 | 7.35 |
| 22 Jul 2025, 11:05 | 7.2 | 7.2 |
| 5 Jun 2025, 11:34 | 7.51 | 7.51 |
| 8 May 2025, 08:20 | 7.68 | 7.68 |
| 10 Apr 2025, 09:19 | 7.7 | 7.7 |
| 6 Mar 2025, 09:01 | 8.16 | 8.16 |
| 4 Feb 2025, 08:28 | 8.07 | 8.07 |
| 21 Jan 2025, 11:17 | 7.06 | 7.06 |
| 3 Dec 2024, 09:12 | 7.65 | 7.65 |
| 21 Nov 2024, 10:35 | 7.7 | 7.7 |
| 24 Oct 2024, 08:50 | 7.58 | 7.58 |
| 17 Sep 2024, 10:19 | 7.54 | 7.54 |
| 21 Aug 2024, 08:29 | 7.61 | 7.61 |
| 24 Jul 2024, 10:28 | 8.01 | 8.01 |
| 18 Jun 2024, 10:59 | 7.79 | 7.79 |
| 14 May 2024, 10:41 | 7.95 | 7.95 |
| 15 Apr 2024, 10:28 | 7.68 | 7.68 |
| 18 Mar 2024, 08:44 | 7.56 | 7.56 |
| 21 Feb 2024, 11:28 | 8.61 | 8.61 |
| 16 Jan 2024, 11:06 | 8.09 | 8.09 |
| 12 Dec 2023, 11:52 | 7.96 | 7.96 |
| 29 Nov 2023, 08:23 | 7.84 | 7.84 |
| 24 Nov 2023, 10:59 | 7.5 | 7.5 |
| 19 Oct 2023, 13:29 | 7.91 | 7.91 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.08 mg/l
Sampled 16 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 0.08 | 0.08 mg/l |
| 6 Feb 2026, 08:24 | 0.33 | 0.33 mg/l |
| 7 Jan 2026, 11:48 | 0.75 | 0.75 mg/l |
| 3 Dec 2025, 10:31 | 0.22 | 0.22 mg/l |
| 10 Nov 2025, 10:51 | 0.13 | 0.13 mg/l |
| 21 Oct 2025, 11:09 | 0.14 | 0.14 mg/l |
| 23 Sep 2025, 11:59 | 0.4 | 0.4 mg/l |
| 15 Aug 2025, 13:55 | 0.27 | 0.27 mg/l |
| 22 Jul 2025, 11:05 | 0.2 | 0.2 mg/l |
| 5 Jun 2025, 11:34 | 4.7 | 4.7 mg/l |
| 8 May 2025, 08:20 | 3.9 | 3.9 mg/l |
| 6 Mar 2025, 09:01 | 0.92 | 0.92 mg/l |
| 4 Feb 2025, 08:28 | 0.36 | 0.36 mg/l |
| 21 Jan 2025, 11:17 | 0.25 | 0.25 mg/l |
| 3 Dec 2024, 09:12 | 0.09 | 0.09 mg/l |
| 21 Nov 2024, 10:35 | 0.055 | 0.055 mg/l |
| 24 Oct 2024, 08:50 | 0.086 | 0.086 mg/l |
| 17 Sep 2024, 10:19 | 0.2 | 0.2 mg/l |
| 21 Aug 2024, 08:29 | 1.5 | 1.5 mg/l |
| 24 Jul 2024, 10:28 | 0.77 | 0.77 mg/l |
| 18 Jun 2024, 10:59 | 1.2 | 1.2 mg/l |
| 14 May 2024, 10:41 | 3.4 | 3.4 mg/l |
| 15 Apr 2024, 10:28 | 0.13 | 0.13 mg/l |
| 18 Mar 2024, 08:44 | 1.2 | 1.2 mg/l |
| 21 Feb 2024, 11:28 | 0.14 | 0.14 mg/l |
| 16 Jan 2024, 11:06 | 0.13 | 0.13 mg/l |
| 12 Dec 2023, 11:52 | 0.13 | 0.13 mg/l |
| 29 Nov 2023, 08:23 | 2.7 | 2.7 mg/l |
| 24 Nov 2023, 10:59 | 0.2 | 0.2 mg/l |
| 19 Oct 2023, 13:29 | 0.17 | 0.17 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.643 mg/l
Sampled 16 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 0.643 | 0.643 mg/l |
| 6 Feb 2026, 08:24 | 4.27 | 4.27 mg/l |
| 7 Jan 2026, 11:48 | 0.228 | 0.228 mg/l |
| 3 Dec 2025, 10:31 | 3.36 | 3.36 mg/l |
| 10 Nov 2025, 10:51 | <0.196 | below 0.196 mg/l (not detected above this) |
| 21 Oct 2025, 11:09 | 0.266 | 0.266 mg/l |
| 23 Sep 2025, 11:59 | 0.156 | 0.156 mg/l |
| 15 Aug 2025, 13:55 | <0.196 | below 0.196 mg/l (not detected above this) |
| 22 Jul 2025, 11:05 | <0.196 | below 0.196 mg/l (not detected above this) |
| 5 Jun 2025, 11:34 | 0.78 | 0.78 mg/l |
| 8 May 2025, 08:20 | 1.52 | 1.52 mg/l |
| 6 Mar 2025, 09:01 | 2.96 | 2.96 mg/l |
| 4 Feb 2025, 08:28 | 2.27 | 2.27 mg/l |
| 21 Jan 2025, 11:17 | 0.901 | 0.901 mg/l |
| 3 Dec 2024, 09:12 | 1.09 | 1.09 mg/l |
| 21 Nov 2024, 10:35 | <0.196 | below 0.196 mg/l (not detected above this) |
| 24 Oct 2024, 08:50 | 1.17 | 1.17 mg/l |
| 17 Sep 2024, 10:19 | 1.84 | 1.84 mg/l |
| 21 Aug 2024, 08:29 | 2.33 | 2.33 mg/l |
| 24 Jul 2024, 10:28 | 2.07 | 2.07 mg/l |
| 18 Jun 2024, 10:59 | 1.78 | 1.78 mg/l |
| 14 May 2024, 10:41 | 1.77 | 1.77 mg/l |
| 15 Apr 2024, 10:28 | 0.186 | 0.186 mg/l |
| 18 Mar 2024, 08:44 | 2.83 | 2.83 mg/l |
| 21 Feb 2024, 11:28 | 1.57 | 1.57 mg/l |
| 16 Jan 2024, 11:06 | 1.68 | 1.68 mg/l |
| 12 Dec 2023, 11:52 | 1.69 | 1.69 mg/l |
| 29 Nov 2023, 08:23 | 2.25 | 2.25 mg/l |
| 24 Nov 2023, 10:59 | <0.196 | below 0.196 mg/l (not detected above this) |
| 19 Oct 2023, 13:29 | 1.55 | 1.55 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.16 mg/l
Sampled 16 Mar 2026, 7 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 0.16 | 0.16 mg/l |
| 6 Feb 2026, 08:24 | 0.085 | 0.085 mg/l |
| 7 Jan 2026, 11:48 | 0.14 | 0.14 mg/l |
| 3 Dec 2025, 10:31 | 0.072 | 0.072 mg/l |
| 10 Nov 2025, 10:51 | 1.8 | 1.8 mg/l |
| 21 Oct 2025, 11:09 | 1.1 | 1.1 mg/l |
| 23 Sep 2025, 11:59 | 0.43 | 0.43 mg/l |
| 15 Aug 2025, 13:55 | 0.11 | 0.11 mg/l |
| 22 Jul 2025, 11:05 | 0.22 | 0.22 mg/l |
| 5 Jun 2025, 11:34 | 0.092 | 0.092 mg/l |
| 8 May 2025, 08:20 | 0.06 | 0.06 mg/l |
| 6 Mar 2025, 09:01 | 0.061 | 0.061 mg/l |
| 4 Feb 2025, 08:28 | 0.023 | 0.023 mg/l |
| 21 Jan 2025, 11:17 | 0.19 | 0.19 mg/l |
| 3 Dec 2024, 09:12 | 0.21 | 0.21 mg/l |
| 21 Nov 2024, 10:35 | 0.1 | 0.1 mg/l |
| 24 Oct 2024, 08:50 | 0.17 | 0.17 mg/l |
| 17 Sep 2024, 10:19 | 0.12 | 0.12 mg/l |
| 21 Aug 2024, 08:29 | 0.26 | 0.26 mg/l |
| 24 Jul 2024, 10:28 | 0.2 | 0.2 mg/l |
| 18 Jun 2024, 10:59 | 0.15 | 0.15 mg/l |
| 14 May 2024, 10:41 | 0.099 | 0.099 mg/l |
| 15 Apr 2024, 10:28 | 0.21 | 0.21 mg/l |
| 18 Mar 2024, 08:44 | 0.055 | 0.055 mg/l |
| 21 Feb 2024, 11:28 | 0.045 | 0.045 mg/l |
| 16 Jan 2024, 11:06 | 0.18 | 0.18 mg/l |
| 12 Dec 2023, 11:52 | 0.076 | 0.076 mg/l |
| 29 Nov 2023, 08:23 | 0.084 | 0.084 mg/l |
| 24 Nov 2023, 10:59 | 0.4 | 0.4 mg/l |
| 19 Oct 2023, 13:29 | 0.16 | 0.16 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
568 µS/cm
Sampled 16 Mar 2026, 7 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 11:18 | 568 | 568 µS/cm |
| 6 Feb 2026, 08:24 | 934 | 934 µS/cm |
| 7 Jan 2026, 11:48 | 311 | 311 µS/cm |
| 3 Dec 2025, 10:31 | 1305 | 1305 µS/cm |
| 10 Nov 2025, 10:51 | 1304 | 1304 µS/cm |
| 21 Oct 2025, 11:09 | 1026 | 1026 µS/cm |
| 23 Sep 2025, 11:59 | 976 | 976 µS/cm |
| 15 Aug 2025, 13:55 | 1190 | 1190 µS/cm |
| 22 Jul 2025, 11:05 | 1151 | 1151 µS/cm |
| 5 Jun 2025, 11:34 | 1278 | 1278 µS/cm |
| 8 May 2025, 08:20 | 1354 | 1354 µS/cm |
| 10 Apr 2025, 09:19 | 1755 | 1755 µS/cm |
| 6 Mar 2025, 09:01 | 1164 | 1164 µS/cm |
| 4 Feb 2025, 08:28 | 1419 | 1419 µS/cm |
| 21 Jan 2025, 11:17 | 329 | 329 µS/cm |
| 3 Dec 2024, 09:12 | 1392 | 1392 µS/cm |
| 21 Nov 2024, 10:35 | 458 | 458 µS/cm |
| 24 Oct 2024, 08:50 | 1142 | 1142 µS/cm |
| 17 Sep 2024, 10:19 | 1826 | 1826 µS/cm |
| 21 Aug 2024, 08:29 | 14790 | 14790 µS/cm |
| 24 Jul 2024, 10:28 | 3341 | 3341 µS/cm |
| 18 Jun 2024, 10:59 | 935 | 935 µS/cm |
| 14 May 2024, 10:41 | 2335 | 2335 µS/cm |
| 15 Apr 2024, 10:28 | 736 | 736 µS/cm |
| 18 Mar 2024, 08:44 | 1099 | 1099 µS/cm |
| 21 Feb 2024, 11:28 | 1737 | 1737 µS/cm |
| 16 Jan 2024, 11:06 | 1097 | 1097 µS/cm |
| 12 Dec 2023, 11:52 | 1005 | 1005 µS/cm |
| 29 Nov 2023, 08:23 | 1065 | 1065 µS/cm |
| 24 Nov 2023, 10:59 | 897 | 897 µS/cm |
| 19 Oct 2023, 13:29 | 1055 | 1055 µS/cm |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 31 | Oct 2023 – Mar 2026 | 43% 16 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Oct 2023 – Mar 2026 | 5.43 mg/l 16 Mar 2026 |
| Temperature of Water 0076 | River water | 31 | Oct 2023 – Mar 2026 | 5.3 °C 16 Mar 2026 |
| pH 0061 | River water | 31 | Oct 2023 – Mar 2026 | 7.25 16 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Oct 2023 – Mar 2026 | 0.08 mg/l 16 Mar 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – Mar 2026 | 0.643 mg/l 16 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Oct 2023 – Mar 2026 | 0.16 mg/l 16 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Oct 2023 – Mar 2026 | 568 µS/cm 16 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – Mar 2026 | 140 mg/l 16 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – Mar 2026 | 0.00019 mg/l 16 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 15 | Nov 2023 – Mar 2025 | 1.3 mg/l 6 Mar 2025 |
| Nitrite as N 0118 | River water | 30 | Oct 2023 – Mar 2026 | 0.067 mg/l 16 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Oct 2023 – Mar 2026 | 0.71 mg/l 16 Mar 2026 |
| Salinity : In Situ 7608 | River water | 19 | Oct 2023 – Mar 2026 | 0.27 parts per thousand 16 Mar 2026 |
| Turbidity : In Situ 3976 | River water | 7 | Jul 2025 – Mar 2026 | 0 FTU 16 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.