Cowfold Stream at A272
EA name: COWFOLD STREAM AT A272
Environment Agency sampling point SO-F0002678 · 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
- 28 May 2026, 12:114 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 Jun 2024 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 522200, 122600As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Cowfold Stream
- River, by the map
- Cowfold StreamPlaced on the river its name gives, 38 m from the line.
- Next gauge downstream
- Beeding Bridge On the River Adur · 17 km along the river
- Why it was sampled
- Monitoring (national agency policy) (32 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
72.1%
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 72.1 | 72.1% |
| 22 May 2026, 11:24 | 83.8 | 83.8% |
| 20 Apr 2026, 14:45 | 91.9 | 91.9% |
| 1 Apr 2026, 12:01 | 85.1 | 85.1% |
| 26 Mar 2026, 12:32 | 96.5 | 96.5% |
| 6 Mar 2026, 13:45 | 96.7 | 96.7% |
| 17 Feb 2026, 10:38 | 96.6 | 96.6% |
| 6 Feb 2026, 09:54 | 98.8 | 98.8% |
| 30 Jan 2026, 10:15 | 101 | 101% |
| 9 Jan 2026, 13:29 | 100.2 | 100.2% |
| 16 Dec 2025, 12:48 | 93.9 | 93.9% |
| 4 Dec 2025, 13:46 | 91 | 91% |
| 24 Nov 2025, 10:57 | 93.3 | 93.3% |
| 19 Nov 2025, 13:10 | 89.8 | 89.8% |
| 5 Nov 2025, 13:00 | 86.1 | 86.1% |
| 16 Oct 2025, 11:58 | 67.6 | 67.6% |
| 25 Sep 2025, 11:00 | 79.9 | 79.9% |
| 27 Aug 2025, 10:20 | 75.5 | 75.5% |
| 17 Jul 2025, 12:07 | 72.2 | 72.2% |
| 6 Jun 2025, 09:30 | 72.5 | 72.5% |
| 7 May 2025, 11:24 | 89.4 | 89.4% |
| 9 Apr 2025, 10:59 | 100.9 | 100.9% |
| 5 Mar 2025, 12:30 | 99.5 | 99.5% |
| 5 Feb 2025, 11:43 | 97.6 | 97.6% |
| 22 Jan 2025, 11:27 | 98.5 | 98.5% |
| 6 Dec 2024, 14:56 | 94.9 | 94.9% |
| 21 Nov 2024, 11:53 | 94.2 | 94.2% |
| 31 Oct 2024, 10:09 | 90.5 | 90.5% |
| 17 Sep 2024, 13:50 | 83.1 | 83.1% |
| 19 Aug 2024, 13:51 | 83.1 | 83.1% |
| 31 Jul 2024, 11:20 | 83.1 | 83.1% |
| 20 Jun 2024, 09:35 | 85 | 85% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.73 mg/l
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 6.73 | 6.73 mg/l |
| 22 May 2026, 11:24 | 8.5 | 8.5 mg/l |
| 20 Apr 2026, 14:45 | 10 | 10 mg/l |
| 1 Apr 2026, 12:01 | 9.56 | 9.56 mg/l |
| 26 Mar 2026, 12:32 | 11.3 | 11.3 mg/l |
| 6 Mar 2026, 13:45 | 11 | 11 mg/l |
| 17 Feb 2026, 10:38 | 12 | 12 mg/l |
| 6 Feb 2026, 09:54 | 11.6 | 11.6 mg/l |
| 30 Jan 2026, 10:15 | 12.2 | 12.2 mg/l |
| 9 Jan 2026, 13:29 | 13 | 13 mg/l |
| 16 Dec 2025, 12:48 | 10.8 | 10.8 mg/l |
| 4 Dec 2025, 13:46 | 10.8 | 10.8 mg/l |
| 24 Nov 2025, 10:57 | 11.6 | 11.6 mg/l |
| 19 Nov 2025, 13:10 | 11.2 | 11.2 mg/l |
| 5 Nov 2025, 13:00 | 9.09 | 9.09 mg/l |
| 16 Oct 2025, 11:58 | 7.29 | 7.29 mg/l |
| 25 Sep 2025, 11:00 | 8.79 | 8.79 mg/l |
| 27 Aug 2025, 10:20 | 7.63 | 7.63 mg/l |
| 17 Jul 2025, 12:07 | 6.95 | 6.95 mg/l |
| 6 Jun 2025, 09:30 | 7.64 | 7.64 mg/l |
| 7 May 2025, 11:24 | 9.91 | 9.91 mg/l |
| 9 Apr 2025, 10:59 | 11.2 | 11.2 mg/l |
| 5 Mar 2025, 12:30 | 12.7 | 12.7 mg/l |
| 5 Feb 2025, 11:43 | 12.5 | 12.5 mg/l |
| 22 Jan 2025, 11:27 | 12.7 | 12.7 mg/l |
| 6 Dec 2024, 14:56 | 11.2 | 11.2 mg/l |
| 21 Nov 2024, 11:53 | 12 | 12 mg/l |
| 31 Oct 2024, 10:09 | 9.62 | 9.62 mg/l |
| 17 Sep 2024, 13:50 | 8.75 | 8.75 mg/l |
| 19 Aug 2024, 13:51 | 8.27 | 8.27 mg/l |
| 31 Jul 2024, 11:20 | 7.85 | 7.85 mg/l |
| 20 Jun 2024, 09:35 | 8.89 | 8.89 mg/l |
Water temperature
code 0076 · °C
18.6 °C
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 18.6 | 18.6 °C |
| 22 May 2026, 11:24 | 14.6 | 14.6 °C |
| 20 Apr 2026, 14:45 | 11.3 | 11.3 °C |
| 1 Apr 2026, 12:01 | 10.1 | 10.1 °C |
| 26 Mar 2026, 12:32 | 8.4 | 8.4 °C |
| 6 Mar 2026, 13:45 | 9.5 | 9.5 °C |
| 17 Feb 2026, 10:38 | 6 | 6 °C |
| 6 Feb 2026, 09:54 | 8.2 | 8.2 °C |
| 30 Jan 2026, 10:15 | 7 | 7 °C |
| 9 Jan 2026, 13:29 | 4.2 | 4.2 °C |
| 16 Dec 2025, 12:48 | 9.3 | 9.3 °C |
| 4 Dec 2025, 13:46 | 8 | 8 °C |
| 24 Nov 2025, 10:57 | 6 | 6 °C |
| 19 Nov 2025, 13:10 | 6 | 6 °C |
| 5 Nov 2025, 13:00 | 12.8 | 12.8 °C |
| 16 Oct 2025, 11:58 | 11.9 | 11.9 °C |
| 25 Sep 2025, 11:00 | 11 | 11 °C |
| 27 Aug 2025, 10:20 | 14.8 | 14.8 °C |
| 17 Jul 2025, 12:07 | 17.1 | 17.1 °C |
| 6 Jun 2025, 09:30 | 12.9 | 12.9 °C |
| 7 May 2025, 11:24 | 10.7 | 10.7 °C |
| 9 Apr 2025, 10:59 | 10.7 | 10.7 °C |
| 5 Mar 2025, 12:30 | 5 | 5 °C |
| 5 Feb 2025, 11:43 | 4.7 | 4.7 °C |
| 22 Jan 2025, 11:27 | 4.7 | 4.7 °C |
| 6 Dec 2024, 14:56 | 8 | 8 °C |
| 21 Nov 2024, 11:53 | 5.1 | 5.1 °C |
| 31 Oct 2024, 10:09 | 12.5 | 12.5 °C |
| 17 Sep 2024, 13:50 | 12.9 | 12.9 °C |
| 19 Aug 2024, 13:51 | 15.5 | 15.5 °C |
| 31 Jul 2024, 11:20 | 18 | 18 °C |
| 20 Jun 2024, 09:35 | 13.2 | 13.2 °C |
pH
code 0061
8
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 8 | 8 |
| 22 May 2026, 11:24 | 7.76 | 7.76 |
| 20 Apr 2026, 14:45 | 7.63 | 7.63 |
| 1 Apr 2026, 12:01 | 7.68 | 7.68 |
| 26 Mar 2026, 12:32 | 7.81 | 7.81 |
| 6 Mar 2026, 13:45 | 7.64 | 7.64 |
| 17 Feb 2026, 10:38 | 7.57 | 7.57 |
| 6 Feb 2026, 09:54 | 7.49 | 7.49 |
| 30 Jan 2026, 10:15 | 7.45 | 7.45 |
| 9 Jan 2026, 13:29 | 7.47 | 7.47 |
| 16 Dec 2025, 12:48 | 7.64 | 7.64 |
| 4 Dec 2025, 13:46 | 7.57 | 7.57 |
| 24 Nov 2025, 10:57 | 7.52 | 7.52 |
| 19 Nov 2025, 13:10 | 7.66 | 7.66 |
| 5 Nov 2025, 13:00 | 7.47 | 7.47 |
| 16 Oct 2025, 11:58 | 7.57 | 7.57 |
| 25 Sep 2025, 11:00 | 8.09 | 8.09 |
| 27 Aug 2025, 10:20 | 7.64 | 7.64 |
| 17 Jul 2025, 12:07 | 7.81 | 7.81 |
| 6 Jun 2025, 09:30 | 7.94 | 7.94 |
| 7 May 2025, 11:24 | 7.71 | 7.71 |
| 9 Apr 2025, 10:59 | 7.81 | 7.81 |
| 5 Mar 2025, 12:30 | 7.65 | 7.65 |
| 5 Feb 2025, 11:43 | 7.64 | 7.64 |
| 22 Jan 2025, 11:27 | 7.7 | 7.7 |
| 6 Dec 2024, 14:56 | 7.53 | 7.53 |
| 21 Nov 2024, 11:53 | 7.61 | 7.61 |
| 31 Oct 2024, 10:09 | 7.39 | 7.39 |
| 17 Sep 2024, 13:50 | 7.68 | 7.68 |
| 19 Aug 2024, 13:51 | 7.79 | 7.79 |
| 31 Jul 2024, 11:20 | 7.67 | 7.67 |
| 20 Jun 2024, 09:35 | 8 | 8 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.044 mg/l
Sampled 28 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 0.044 | 0.044 mg/l |
| 22 May 2026, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Apr 2026, 14:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2026, 12:01 | 0.034 | 0.034 mg/l |
| 26 Mar 2026, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2026, 13:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Feb 2026, 10:38 | 0.033 | 0.033 mg/l |
| 6 Feb 2026, 09:54 | 0.031 | 0.031 mg/l |
| 30 Jan 2026, 10:15 | 0.042 | 0.042 mg/l |
| 9 Jan 2026, 13:29 | 0.083 | 0.083 mg/l |
| 16 Dec 2025, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2025, 13:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Nov 2025, 10:57 | 0.043 | 0.043 mg/l |
| 19 Nov 2025, 13:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2025, 11:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Sep 2025, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Aug 2025, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2025, 12:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jun 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 May 2025, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2025, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2025, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2025, 11:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2025, 11:27 | 0.031 | 0.031 mg/l |
| 21 Nov 2024, 11:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Oct 2024, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Sep 2024, 13:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Jul 2024, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2024, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.621 mg/l
Sampled 28 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 0.621 | 0.621 mg/l |
| 22 May 2026, 11:24 | 0.563 | 0.563 mg/l |
| 20 Apr 2026, 14:45 | 0.792 | 0.792 mg/l |
| 1 Apr 2026, 12:01 | 1.19 | 1.19 mg/l |
| 26 Mar 2026, 12:32 | 1.19 | 1.19 mg/l |
| 6 Mar 2026, 13:45 | 1.69 | 1.69 mg/l |
| 17 Feb 2026, 10:38 | 1.69 | 1.69 mg/l |
| 6 Feb 2026, 09:54 | 1.4 | 1.4 mg/l |
| 30 Jan 2026, 10:15 | 1.39 | 1.39 mg/l |
| 9 Jan 2026, 13:29 | 2.29 | 2.29 mg/l |
| 16 Dec 2025, 12:48 | 2.39 | 2.39 mg/l |
| 4 Dec 2025, 13:46 | 1.79 | 1.79 mg/l |
| 24 Nov 2025, 10:57 | 1.79 | 1.79 mg/l |
| 19 Nov 2025, 13:10 | 1.29 | 1.29 mg/l |
| 5 Nov 2025, 13:00 | 1.29 | 1.29 mg/l |
| 16 Oct 2025, 11:58 | 0.206 | 0.206 mg/l |
| 25 Sep 2025, 11:00 | 0.656 | 0.656 mg/l |
| 27 Aug 2025, 10:20 | 0.396 | 0.396 mg/l |
| 17 Jul 2025, 12:07 | 0.456 | 0.456 mg/l |
| 6 Jun 2025, 09:30 | 0.586 | 0.586 mg/l |
| 7 May 2025, 11:24 | 0.993 | 0.993 mg/l |
| 9 Apr 2025, 10:59 | 1.39 | 1.39 mg/l |
| 5 Mar 2025, 12:30 | 2.39 | 2.39 mg/l |
| 5 Feb 2025, 11:43 | 2.39 | 2.39 mg/l |
| 22 Jan 2025, 11:27 | 2.49 | 2.49 mg/l |
| 21 Nov 2024, 11:53 | 1.39 | 1.39 mg/l |
| 31 Oct 2024, 10:09 | 1.59 | 1.59 mg/l |
| 17 Sep 2024, 13:50 | 0.506 | 0.506 mg/l |
| 31 Jul 2024, 11:20 | 0.596 | 0.596 mg/l |
| 20 Jun 2024, 09:35 | 0.915 | 0.915 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.095 mg/l
Sampled 28 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 0.095 | 0.095 mg/l |
| 22 May 2026, 11:24 | 0.079 | 0.079 mg/l |
| 20 Apr 2026, 14:45 | 0.066 | 0.066 mg/l |
| 1 Apr 2026, 12:01 | 0.04 | 0.04 mg/l |
| 26 Mar 2026, 12:32 | 0.047 | 0.047 mg/l |
| 6 Mar 2026, 13:45 | 0.046 | 0.046 mg/l |
| 17 Feb 2026, 10:38 | 0.048 | 0.048 mg/l |
| 6 Feb 2026, 09:54 | 0.064 | 0.064 mg/l |
| 30 Jan 2026, 10:15 | 0.089 | 0.089 mg/l |
| 9 Jan 2026, 13:29 | 0.068 | 0.068 mg/l |
| 16 Dec 2025, 12:48 | 0.045 | 0.045 mg/l |
| 4 Dec 2025, 13:46 | 0.082 | 0.082 mg/l |
| 24 Nov 2025, 10:57 | 0.057 | 0.057 mg/l |
| 19 Nov 2025, 13:10 | 0.065 | 0.065 mg/l |
| 5 Nov 2025, 13:00 | 0.066 | 0.066 mg/l |
| 16 Oct 2025, 11:58 | 0.066 | 0.066 mg/l |
| 25 Sep 2025, 11:00 | 0.11 | 0.11 mg/l |
| 27 Aug 2025, 10:20 | 0.12 | 0.12 mg/l |
| 17 Jul 2025, 12:07 | 0.1 | 0.1 mg/l |
| 6 Jun 2025, 09:30 | 0.07 | 0.07 mg/l |
| 7 May 2025, 11:24 | 0.088 | 0.088 mg/l |
| 9 Apr 2025, 10:59 | 0.058 | 0.058 mg/l |
| 5 Mar 2025, 12:30 | 0.032 | 0.032 mg/l |
| 5 Feb 2025, 11:43 | 0.045 | 0.045 mg/l |
| 22 Jan 2025, 11:27 | 0.046 | 0.046 mg/l |
| 21 Nov 2024, 11:53 | 0.051 | 0.051 mg/l |
| 31 Oct 2024, 10:09 | 0.054 | 0.054 mg/l |
| 17 Sep 2024, 13:50 | 0.081 | 0.081 mg/l |
| 31 Jul 2024, 11:20 | 0.11 | 0.11 mg/l |
| 20 Jun 2024, 09:35 | 0.083 | 0.083 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
368 µS/cm
Sampled 28 May 2026, 4 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 May 2026, 12:11 | 368 | 368 µS/cm |
| 22 May 2026, 11:24 | 339 | 339 µS/cm |
| 20 Apr 2026, 14:45 | 316 | 316 µS/cm |
| 1 Apr 2026, 12:01 | 297 | 297 µS/cm |
| 26 Mar 2026, 12:32 | 290 | 290 µS/cm |
| 6 Mar 2026, 13:45 | 263 | 263 µS/cm |
| 17 Feb 2026, 10:38 | 239 | 239 µS/cm |
| 6 Feb 2026, 09:54 | 191 | 191 µS/cm |
| 30 Jan 2026, 10:15 | 191 | 191 µS/cm |
| 9 Jan 2026, 13:29 | 240 | 240 µS/cm |
| 16 Dec 2025, 12:48 | 272 | 272 µS/cm |
| 4 Dec 2025, 13:46 | 258 | 258 µS/cm |
| 24 Nov 2025, 10:57 | 295 | 295 µS/cm |
| 19 Nov 2025, 13:10 | 334 | 334 µS/cm |
| 5 Nov 2025, 13:00 | 321 | 321 µS/cm |
| 16 Oct 2025, 11:58 | 393 | 393 µS/cm |
| 25 Sep 2025, 11:00 | 560 | 560 µS/cm |
| 27 Aug 2025, 10:20 | 411 | 411 µS/cm |
| 17 Jul 2025, 12:07 | 391 | 391 µS/cm |
| 6 Jun 2025, 09:30 | 385 | 385 µS/cm |
| 7 May 2025, 11:24 | 371 | 371 µS/cm |
| 9 Apr 2025, 10:59 | 325 | 325 µS/cm |
| 5 Mar 2025, 12:30 | 276 | 276 µS/cm |
| 5 Feb 2025, 11:43 | 273 | 273 µS/cm |
| 22 Jan 2025, 11:27 | 299 | 299 µS/cm |
| 6 Dec 2024, 14:56 | 246 | 246 µS/cm |
| 21 Nov 2024, 11:53 | 291 | 291 µS/cm |
| 31 Oct 2024, 10:09 | 291 | 291 µS/cm |
| 17 Sep 2024, 13:50 | 358 | 358 µS/cm |
| 19 Aug 2024, 13:51 | 364 | 364 µS/cm |
| 31 Jul 2024, 11:20 | 351 | 351 µS/cm |
| 20 Jun 2024, 09:35 | 324 | 324 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 | Jun 2024 – May 2026 | 72.1% 28 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 32 | Jun 2024 – May 2026 | 6.73 mg/l 28 May 2026 |
| Temperature of Water 0076 | River water | 32 | Jun 2024 – May 2026 | 18.6 °C 28 May 2026 |
| pH 0061 | River water | 32 | Jun 2024 – May 2026 | 8 28 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Jun 2024 – May 2026 | 0.044 mg/l 28 May 2026 |
| Nitrate as N 0117 | River water | 30 | Jun 2024 – May 2026 | 0.621 mg/l 28 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Jun 2024 – May 2026 | 0.095 mg/l 28 May 2026 |
| Conductivity at 25 C 0077 | River water | 32 | Jun 2024 – May 2026 | 368 µS/cm 28 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Jun 2024 – May 2026 | 100 mg/l 28 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Jun 2024 – May 2026 | 0.0015 mg/l 28 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 29 | Jun 2024 – May 2026 | 1.1 mg/l 28 May 2026 |
| Nitrite as N 0118 | River water | 30 | Jun 2024 – May 2026 | 0.0086 mg/l 28 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Jun 2024 – May 2026 | 0.63 mg/l 28 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.