Colne Water above Colne sewage treatment works
EA name: COLNE WATER ABOVE COLNE STW
Environment Agency sampling point NW-88003489 · 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
- 29 May 2026, 11:344 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
- 32 since 20 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 387613, 439438As published, to the nearest 1 m. Open in a map
- River, by its own name
- Colne Water
- River, by the map
- Colne WaterPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Reedyford On the Pendle Water · 2.8 km along the river (the path rests on a repair to the map)
- Nearest gauge upstream
- Carry Bridge On the Colne Water · 2.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (32 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.9%
Sampled 29 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 100.9 | 100.9% |
| 11 May 2026, 10:28 | 104.7 | 104.7% |
| 17 Apr 2026, 10:32 | 103.8 | 103.8% |
| 13 Apr 2026, 13:08 | 111.7 | 111.7% |
| 24 Mar 2026, 09:37 | 100.6 | 100.6% |
| 10 Mar 2026, 10:15 | 101.8 | 101.8% |
| 24 Feb 2026, 08:55 | 100.1 | 100.1% |
| 10 Feb 2026, 11:53 | 101.2 | 101.2% |
| 27 Jan 2026, 10:55 | 101.1 | 101.1% |
| 9 Jan 2026, 13:04 | 98.3 | 98.3% |
| 16 Dec 2025, 11:34 | 100.6 | 100.6% |
| 2 Dec 2025, 10:36 | 100.6 | 100.6% |
| 17 Nov 2025, 11:21 | 101 | 101% |
| 5 Nov 2025, 11:40 | 101.1 | 101.1% |
| 12 Mar 2025, 14:17 | 101.3 | 101.3% |
| 25 Feb 2025, 14:11 | 105.6 | 105.6% |
| 31 Jan 2025, 11:33 | 102 | 102% |
| 11 Dec 2024, 12:58 | 100.6 | 100.6% |
| 25 Nov 2024, 15:09 | 101.2 | 101.2% |
| 16 Oct 2024, 10:46 | 98.8 | 98.8% |
| 17 Sep 2024, 10:21 | 97.4 | 97.4% |
| 19 Aug 2024, 09:45 | 103.3 | 103.3% |
| 25 Jul 2024, 12:38 | 106.5 | 106.5% |
| 26 Jun 2024, 08:32 | 99.9 | 99.9% |
| 17 May 2024, 09:57 | 97.5 | 97.5% |
| 19 Apr 2024, 13:02 | 106 | 106% |
| 27 Mar 2024, 12:03 | 102.9 | 102.9% |
| 21 Feb 2024, 13:16 | 103.5 | 103.5% |
| 30 Jan 2024, 09:30 | 101 | 101% |
| 4 Dec 2023, 11:27 | 99.8 | 99.8% |
| 21 Nov 2023, 11:23 | 100.2 | 100.2% |
| 20 Oct 2023, 10:22 | 100.1 | 100.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.1 mg/l
Sampled 29 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 10.1 | 10.1 mg/l |
| 11 May 2026, 10:28 | 11.9 | 11.9 mg/l |
| 17 Apr 2026, 10:32 | 11.7 | 11.7 mg/l |
| 13 Apr 2026, 13:08 | 13.1 | 13.1 mg/l |
| 24 Mar 2026, 09:37 | 11.6 | 11.6 mg/l |
| 10 Mar 2026, 10:15 | 12.1 | 12.1 mg/l |
| 24 Feb 2026, 08:55 | 11.8 | 11.8 mg/l |
| 10 Feb 2026, 11:53 | 12.4 | 12.4 mg/l |
| 27 Jan 2026, 10:55 | 13.1 | 13.1 mg/l |
| 9 Jan 2026, 13:04 | 12.9 | 12.9 mg/l |
| 16 Dec 2025, 11:34 | 12.1 | 12.1 mg/l |
| 2 Dec 2025, 10:36 | 12.3 | 12.3 mg/l |
| 17 Nov 2025, 11:21 | 12.5 | 12.5 mg/l |
| 5 Nov 2025, 11:40 | 10.9 | 10.9 mg/l |
| 12 Mar 2025, 14:17 | 12.5 | 12.5 mg/l |
| 25 Feb 2025, 14:11 | 12.9 | 12.9 mg/l |
| 31 Jan 2025, 11:33 | 13 | 13 mg/l |
| 11 Dec 2024, 12:58 | 12.4 | 12.4 mg/l |
| 25 Nov 2024, 15:09 | 12.1 | 12.1 mg/l |
| 16 Oct 2024, 10:46 | 10.8 | 10.8 mg/l |
| 17 Sep 2024, 10:21 | 10.8 | 10.8 mg/l |
| 19 Aug 2024, 09:45 | 10.9 | 10.9 mg/l |
| 25 Jul 2024, 12:38 | 10.5 | 10.5 mg/l |
| 26 Jun 2024, 08:32 | 10 | 10 mg/l |
| 17 May 2024, 09:57 | 10.3 | 10.3 mg/l |
| 19 Apr 2024, 13:02 | 12.1 | 12.1 mg/l |
| 27 Mar 2024, 12:03 | 12.1 | 12.1 mg/l |
| 21 Feb 2024, 13:16 | 12.1 | 12.1 mg/l |
| 30 Jan 2024, 09:30 | 12.6 | 12.6 mg/l |
| 4 Dec 2023, 11:27 | 12.8 | 12.8 mg/l |
| 21 Nov 2023, 11:23 | 11.6 | 11.6 mg/l |
| 20 Oct 2023, 10:22 | 10.8 | 10.8 mg/l |
Water temperature
code 0076 · °C
15.4 °C
Sampled 29 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 15.4 | 15.4 °C |
| 11 May 2026, 10:28 | 9.6 | 9.6 °C |
| 17 Apr 2026, 10:32 | 10 | 10 °C |
| 13 Apr 2026, 13:08 | 8.4 | 8.4 °C |
| 24 Mar 2026, 09:37 | 8.9 | 8.9 °C |
| 10 Mar 2026, 10:15 | 7.7 | 7.7 °C |
| 24 Feb 2026, 08:55 | 8 | 8 °C |
| 10 Feb 2026, 11:53 | 6.7 | 6.7 °C |
| 27 Jan 2026, 10:55 | 4.4 | 4.4 °C |
| 9 Jan 2026, 13:04 | 4 | 4 °C |
| 16 Dec 2025, 11:34 | 7.4 | 7.4 °C |
| 2 Dec 2025, 10:36 | 6.7 | 6.7 °C |
| 17 Nov 2025, 11:21 | 6.3 | 6.3 °C |
| 5 Nov 2025, 11:40 | 12 | 12 °C |
| 12 Mar 2025, 14:17 | 6.4 | 6.4 °C |
| 25 Feb 2025, 14:11 | 6.7 | 6.7 °C |
| 31 Jan 2025, 11:33 | 5 | 5 °C |
| 11 Dec 2024, 12:58 | 6.4 | 6.4 °C |
| 25 Nov 2024, 15:09 | 7.7 | 7.7 °C |
| 16 Oct 2024, 10:46 | 11.4 | 11.4 °C |
| 17 Sep 2024, 10:21 | 10.7 | 10.7 °C |
| 19 Aug 2024, 09:45 | 13 | 13 °C |
| 25 Jul 2024, 12:38 | 16 | 16 °C |
| 26 Jun 2024, 08:32 | 15.1 | 15.1 °C |
| 17 May 2024, 09:57 | 12.6 | 12.6 °C |
| 19 Apr 2024, 13:02 | 9.6 | 9.6 °C |
| 27 Mar 2024, 12:03 | 8.3 | 8.3 °C |
| 21 Feb 2024, 13:16 | 8.6 | 8.6 °C |
| 30 Jan 2024, 09:30 | 6 | 6 °C |
| 4 Dec 2023, 11:27 | 4.8 | 4.8 °C |
| 21 Nov 2023, 11:23 | 8.9 | 8.9 °C |
| 20 Oct 2023, 10:22 | 11.8 | 11.8 °C |
pH
code 0061
7.95
Sampled 29 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 7.95 | 7.95 |
| 11 May 2026, 10:28 | 8.16 | 8.16 |
| 17 Apr 2026, 10:32 | 8.17 | 8.17 |
| 13 Apr 2026, 13:08 | 8.66 | 8.66 |
| 24 Mar 2026, 09:37 | 7.99 | 7.99 |
| 10 Mar 2026, 10:15 | 7.86 | 7.86 |
| 24 Feb 2026, 08:55 | 7.93 | 7.93 |
| 10 Feb 2026, 11:53 | 7.98 | 7.98 |
| 27 Jan 2026, 10:55 | 7.84 | 7.84 |
| 9 Jan 2026, 13:04 | 8.01 | 8.01 |
| 16 Dec 2025, 11:34 | 7.72 | 7.72 |
| 2 Dec 2025, 10:36 | 7.67 | 7.67 |
| 17 Nov 2025, 11:21 | 7.98 | 7.98 |
| 5 Nov 2025, 11:40 | 7.93 | 7.93 |
| 12 Mar 2025, 14:17 | 8.02 | 8.02 |
| 25 Feb 2025, 14:11 | 8.08 | 8.08 |
| 31 Jan 2025, 11:33 | 7.93 | 7.93 |
| 11 Dec 2024, 12:58 | 7.96 | 7.96 |
| 25 Nov 2024, 15:09 | 8.04 | 8.04 |
| 16 Oct 2024, 10:46 | 7.87 | 7.87 |
| 17 Sep 2024, 10:21 | 7.91 | 7.91 |
| 19 Aug 2024, 09:45 | 8.04 | 8.04 |
| 25 Jul 2024, 12:38 | 8.08 | 8.08 |
| 26 Jun 2024, 08:32 | 8.18 | 8.18 |
| 17 May 2024, 09:57 | 7.92 | 7.92 |
| 19 Apr 2024, 13:02 | 8.11 | 8.11 |
| 27 Mar 2024, 12:03 | 8.11 | 8.11 |
| 21 Feb 2024, 13:16 | 7.83 | 7.83 |
| 30 Jan 2024, 09:30 | 7.82 | 7.82 |
| 4 Dec 2023, 11:27 | 7.88 | 7.88 |
| 21 Nov 2023, 11:23 | 7.81 | 7.81 |
| 20 Oct 2023, 10:22 | 7.68 | 7.68 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.021 mg/l
Sampled 29 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 0.021 | 0.021 mg/l |
| 11 May 2026, 10:28 | 0.01 | 0.01 mg/l |
| 17 Apr 2026, 10:32 | 0.048 | 0.048 mg/l |
| 13 Apr 2026, 13:08 | 0.014 | 0.014 mg/l |
| 24 Mar 2026, 09:37 | 0.066 | 0.066 mg/l |
| 10 Mar 2026, 10:15 | 0.029 | 0.029 mg/l |
| 24 Feb 2026, 08:55 | 0.055 | 0.055 mg/l |
| 10 Feb 2026, 11:53 | 0.032 | 0.032 mg/l |
| 27 Jan 2026, 10:55 | 0.044 | 0.044 mg/l |
| 9 Jan 2026, 13:04 | 0.042 | 0.042 mg/l |
| 16 Dec 2025, 11:34 | 0.023 | 0.023 mg/l |
| 2 Dec 2025, 10:36 | 0.016 | 0.016 mg/l |
| 17 Nov 2025, 11:21 | 0.0088 | 0.0088 mg/l |
| 5 Nov 2025, 11:40 | 0.011 | 0.011 mg/l |
| 12 Mar 2025, 14:17 | 0.24 | 0.24 mg/l |
| 25 Feb 2025, 14:11 | 0.02 | 0.02 mg/l |
| 31 Jan 2025, 11:33 | 0.029 | 0.029 mg/l |
| 11 Dec 2024, 12:58 | 0.021 | 0.021 mg/l |
| 25 Nov 2024, 15:09 | 0.047 | 0.047 mg/l |
| 16 Oct 2024, 10:46 | 0.023 | 0.023 mg/l |
| 17 Sep 2024, 10:21 | 0.028 | 0.028 mg/l |
| 19 Aug 2024, 09:45 | 0.012 | 0.012 mg/l |
| 25 Jul 2024, 12:38 | 0.017 | 0.017 mg/l |
| 26 Jun 2024, 08:32 | 0.019 | 0.019 mg/l |
| 17 May 2024, 09:57 | 0.035 | 0.035 mg/l |
| 19 Apr 2024, 13:02 | 0.015 | 0.015 mg/l |
| 27 Mar 2024, 12:03 | 0.04 | 0.04 mg/l |
| 21 Feb 2024, 13:16 | 0.045 | 0.045 mg/l |
| 30 Jan 2024, 09:30 | 0.057 | 0.057 mg/l |
| 21 Nov 2023, 11:23 | 0.034 | 0.034 mg/l |
| 20 Oct 2023, 10:22 | 0.072 | 0.072 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.735 mg/l
Sampled 29 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 0.735 | 0.735 mg/l |
| 11 May 2026, 10:28 | 0.855 | 0.855 mg/l |
| 17 Apr 2026, 10:32 | 0.72 | 0.72 mg/l |
| 13 Apr 2026, 13:08 | 0.723 | 0.723 mg/l |
| 24 Mar 2026, 09:37 | 0.983 | 0.983 mg/l |
| 10 Mar 2026, 10:15 | 1.09 | 1.09 mg/l |
| 24 Feb 2026, 08:55 | 1.39 | 1.39 mg/l |
| 10 Feb 2026, 11:53 | 1.39 | 1.39 mg/l |
| 27 Jan 2026, 10:55 | 1.18 | 1.18 mg/l |
| 9 Jan 2026, 13:04 | 1.19 | 1.19 mg/l |
| 16 Dec 2025, 11:34 | 1.1 | 1.1 mg/l |
| 2 Dec 2025, 10:36 | 0.945 | 0.945 mg/l |
| 17 Nov 2025, 11:21 | 1.1 | 1.1 mg/l |
| 5 Nov 2025, 11:40 | 0.695 | 0.695 mg/l |
| 12 Mar 2025, 14:17 | 1.17 | 1.17 mg/l |
| 25 Feb 2025, 14:11 | 0.924 | 0.924 mg/l |
| 31 Jan 2025, 11:33 | 0.995 | 0.995 mg/l |
| 11 Dec 2024, 12:58 | 1.3 | 1.3 mg/l |
| 25 Nov 2024, 15:09 | 1.09 | 1.09 mg/l |
| 16 Oct 2024, 10:46 | 0.968 | 0.968 mg/l |
| 17 Sep 2024, 10:21 | 0.88 | 0.88 mg/l |
| 19 Aug 2024, 09:45 | 0.844 | 0.844 mg/l |
| 25 Jul 2024, 12:38 | 0.881 | 0.881 mg/l |
| 26 Jun 2024, 08:32 | 0.958 | 0.958 mg/l |
| 17 May 2024, 09:57 | 0.772 | 0.772 mg/l |
| 19 Apr 2024, 13:02 | 0.675 | 0.675 mg/l |
| 27 Mar 2024, 12:03 | 0.832 | 0.832 mg/l |
| 21 Feb 2024, 13:16 | 0.573 | 0.573 mg/l |
| 30 Jan 2024, 09:30 | 0.894 | 0.894 mg/l |
| 21 Nov 2023, 11:23 | 0.994 | 0.994 mg/l |
| 20 Oct 2023, 10:22 | 0.516 | 0.516 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.014 mg/l
Sampled 29 May 2026, 4 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 0.014 | 0.014 mg/l |
| 11 May 2026, 10:28 | 0.0055 | 0.0055 mg/l |
| 17 Apr 2026, 10:32 | 0.014 | 0.014 mg/l |
| 13 Apr 2026, 13:08 | 0.013 | 0.013 mg/l |
| 24 Mar 2026, 09:37 | 0.024 | 0.024 mg/l |
| 10 Mar 2026, 10:15 | 0.018 | 0.018 mg/l |
| 24 Feb 2026, 08:55 | 0.029 | 0.029 mg/l |
| 10 Feb 2026, 11:53 | 0.025 | 0.025 mg/l |
| 27 Jan 2026, 10:55 | 0.082 | 0.082 mg/l |
| 9 Jan 2026, 13:04 | 0.025 | 0.025 mg/l |
| 16 Dec 2025, 11:34 | 0.028 | 0.028 mg/l |
| 2 Dec 2025, 10:36 | 0.027 | 0.027 mg/l |
| 17 Nov 2025, 11:21 | 0.023 | 0.023 mg/l |
| 5 Nov 2025, 11:40 | 0.043 | 0.043 mg/l |
| 12 Mar 2025, 14:17 | 0.082 | 0.082 mg/l |
| 25 Feb 2025, 14:11 | 0.021 | 0.021 mg/l |
| 31 Jan 2025, 11:33 | 0.028 | 0.028 mg/l |
| 11 Dec 2024, 12:58 | 0.017 | 0.017 mg/l |
| 25 Nov 2024, 15:09 | 0.059 | 0.059 mg/l |
| 16 Oct 2024, 10:46 | 0.047 | 0.047 mg/l |
| 17 Sep 2024, 10:21 | 0.03 | 0.03 mg/l |
| 19 Aug 2024, 09:45 | 0.015 | 0.015 mg/l |
| 25 Jul 2024, 12:38 | 0.023 | 0.023 mg/l |
| 26 Jun 2024, 08:32 | 0.021 | 0.021 mg/l |
| 17 May 2024, 09:57 | 0.027 | 0.027 mg/l |
| 19 Apr 2024, 13:02 | 0.025 | 0.025 mg/l |
| 27 Mar 2024, 12:03 | 0.024 | 0.024 mg/l |
| 21 Feb 2024, 13:16 | 0.041 | 0.041 mg/l |
| 30 Jan 2024, 09:30 | 0.037 | 0.037 mg/l |
| 21 Nov 2023, 11:23 | 0.031 | 0.031 mg/l |
| 20 Oct 2023, 10:22 | 0.063 | 0.063 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
282 µS/cm
Sampled 29 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 11:34 | 282 | 282 µS/cm |
| 11 May 2026, 10:28 | 305 | 305 µS/cm |
| 17 Apr 2026, 10:32 | 235 | 235 µS/cm |
| 13 Apr 2026, 13:08 | 233 | 233 µS/cm |
| 24 Mar 2026, 09:37 | 264 | 264 µS/cm |
| 10 Mar 2026, 10:15 | 257 | 257 µS/cm |
| 24 Feb 2026, 08:55 | 234 | 234 µS/cm |
| 10 Feb 2026, 11:53 | 208 | 208 µS/cm |
| 27 Jan 2026, 10:55 | 237 | 237 µS/cm |
| 9 Jan 2026, 13:04 | 286 | 286 µS/cm |
| 16 Dec 2025, 11:34 | 169 | 169 µS/cm |
| 2 Dec 2025, 10:36 | 158 | 158 µS/cm |
| 17 Nov 2025, 11:21 | 189 | 189 µS/cm |
| 5 Nov 2025, 11:40 | 172 | 172 µS/cm |
| 12 Mar 2025, 14:17 | 930 | 930 µS/cm |
| 25 Feb 2025, 14:11 | 254 | 254 µS/cm |
| 31 Jan 2025, 11:33 | 274 | 274 µS/cm |
| 11 Dec 2024, 12:58 | 254 | 254 µS/cm |
| 25 Nov 2024, 15:09 | 209 | 209 µS/cm |
| 16 Oct 2024, 10:46 | 274 | 274 µS/cm |
| 17 Sep 2024, 10:21 | 297 | 297 µS/cm |
| 19 Aug 2024, 09:45 | 358 | 358 µS/cm |
| 25 Jul 2024, 12:38 | 330 | 330 µS/cm |
| 26 Jun 2024, 08:32 | 326 | 326 µS/cm |
| 17 May 2024, 09:57 | 245 | 245 µS/cm |
| 19 Apr 2024, 13:02 | 195 | 195 µS/cm |
| 27 Mar 2024, 12:03 | 202 | 202 µS/cm |
| 21 Feb 2024, 13:16 | 135 | 135 µS/cm |
| 30 Jan 2024, 09:30 | 124 | 124 µS/cm |
| 4 Dec 2023, 11:27 | 358 | 358 µS/cm |
| 21 Nov 2023, 11:23 | 189 | 189 µS/cm |
| 20 Oct 2023, 10:22 | 88 | 88 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 | 32 | Oct 2023 – May 2026 | 100.9% 29 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 32 | Oct 2023 – May 2026 | 10.1 mg/l 29 May 2026 |
| Temperature of Water 0076 | River water | 32 | Oct 2023 – May 2026 | 15.4 °C 29 May 2026 |
| pH 0061 | River water | 32 | Oct 2023 – May 2026 | 7.95 29 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Oct 2023 – May 2026 | 0.021 mg/l 29 May 2026 |
| Nitrate as N 0117 | River water | 31 | Oct 2023 – May 2026 | 0.735 mg/l 29 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Oct 2023 – May 2026 | 0.014 mg/l 29 May 2026 |
| Conductivity at 25 C 0077 | River water | 32 | Oct 2023 – May 2026 | 282 µS/cm 29 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 32 | Oct 2023 – May 2026 | 90 mg/l 29 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Oct 2023 – May 2026 | 0.00051 mg/l 29 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 27 | Feb 2024 – May 2026 | 1.2 mg/l 29 May 2026 |
| Nitrite as N 0118 | River water | 31 | Oct 2023 – May 2026 | 0.0053 mg/l 29 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 31 | Oct 2023 – May 2026 | 0.74 mg/l 29 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.