Gypsey Race at Woldgate
EA name: GYPSEY RACE AT WOLDGATE
Environment Agency sampling point NE-49000065 · 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
- 26 Aug 2026, 11:3836 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 37 since 1 Nov 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 516577, 467546As published, to the nearest 1 m. Open in a map
- River, by its own name
- Gypsey Race
- River, by the map
- Gypsey RacePlaced on the river its name gives, 7 m from the line.
- Next gauge downstream
- Bridlington On the North Sea · 2.7 km along the river
- Nearest gauge upstream
- Boynton On the Gypsey Race · 3.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Statutory failures (follow ups at non-designated points) (5 samples)
Planned investigation (local monitoring) (5 samples)
6 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
48.2%
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 48.2 | 48.2% |
| 18 Jun 2026, 09:43 | 84.7 | 84.7% |
| 22 May 2026, 11:52 | 126.3 | 126.3% |
| 11 May 2026, 13:38 | 123.3 | 123.3% |
| 16 Apr 2026, 13:16 | 132.1 | 132.1% |
| 16 Apr 2026, 13:15 | 126.6 | 126.6% |
| 27 Mar 2026, 10:36 | 103.3 | 103.3% |
| 24 Mar 2026, 09:46 | 101.4 | 101.4% |
| 4 Mar 2026, 11:58 | 112 | 112% |
| 19 Feb 2026, 12:11 | 99.5 | 99.5% |
| 12 Feb 2026, 10:14 | 95.3 | 95.3% |
| 16 Dec 2025, 09:08 | 90.3 | 90.3% |
| 4 Dec 2025, 10:57 | 70.9 | 70.9% |
| 27 Nov 2025, 13:21 | 68.9 | 68.9% |
| 11 Jun 2025, 10:31 | 104.9 | 104.9% |
| 27 May 2025, 12:40 | 106.1 | 106.1% |
| 22 Apr 2025, 09:03 | 103.4 | 103.4% |
| 22 Apr 2025, 09:00 | 103.7 | 103.7% |
| 25 Feb 2025, 10:08 | 99.4 | 99.4% |
| 21 Jan 2025, 09:57 | 96.1 | 96.1% |
| 5 Dec 2024, 08:53 | 90.6 | 90.6% |
| 29 Nov 2024, 08:53 | 95.4 | 95.4% |
| 17 Oct 2024, 11:59 | 85.4 | 85.4% |
| 16 Sep 2024, 13:36 | 55.5 | 55.5% |
| 23 Aug 2024, 10:56 | 80.6 | 80.6% |
| 15 Jul 2024, 10:11 | 105.1 | 105.1% |
| 1 Mar 2024, 12:12 | 104 | 104% |
| 7 Feb 2024, 09:46 | 96.8 | 96.8% |
| 3 Jan 2024, 10:40 | 94.2 | 94.2% |
| 4 Dec 2023, 10:55 | 90.2 | 90.2% |
| 1 Nov 2023, 11:09 | 56.4 | 56.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.72 mg/l
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 4.72 | 4.72 mg/l |
| 18 Jun 2026, 09:43 | 8.32 | 8.32 mg/l |
| 22 May 2026, 11:52 | 12.7 | 12.7 mg/l |
| 11 May 2026, 13:38 | 13.5 | 13.5 mg/l |
| 16 Apr 2026, 13:16 | 14.2 | 14.2 mg/l |
| 16 Apr 2026, 13:15 | 13.7 | 13.7 mg/l |
| 27 Mar 2026, 10:36 | 11.9 | 11.9 mg/l |
| 24 Mar 2026, 09:46 | 11.5 | 11.5 mg/l |
| 4 Mar 2026, 11:58 | 13 | 13 mg/l |
| 19 Feb 2026, 12:11 | 12.2 | 12.2 mg/l |
| 12 Feb 2026, 10:14 | 11.3 | 11.3 mg/l |
| 16 Dec 2025, 09:08 | 10.4 | 10.4 mg/l |
| 4 Dec 2025, 10:57 | 8.49 | 8.49 mg/l |
| 27 Nov 2025, 13:21 | 7.99 | 7.99 mg/l |
| 11 Jun 2025, 10:31 | 10.6 | 10.6 mg/l |
| 27 May 2025, 12:40 | 11.2 | 11.2 mg/l |
| 22 Apr 2025, 09:03 | 11.9 | 11.9 mg/l |
| 22 Apr 2025, 09:00 | 11.9 | 11.9 mg/l |
| 25 Feb 2025, 10:08 | 11.9 | 11.9 mg/l |
| 21 Jan 2025, 09:57 | 11.5 | 11.5 mg/l |
| 5 Dec 2024, 08:53 | 10.6 | 10.6 mg/l |
| 29 Nov 2024, 08:53 | 12 | 12 mg/l |
| 17 Oct 2024, 11:59 | 9.04 | 9.04 mg/l |
| 16 Sep 2024, 13:36 | 5.97 | 5.97 mg/l |
| 23 Aug 2024, 10:56 | 8.21 | 8.21 mg/l |
| 15 Jul 2024, 10:11 | 11.1 | 11.1 mg/l |
| 1 Mar 2024, 12:12 | 12.6 | 12.6 mg/l |
| 7 Feb 2024, 09:46 | 12 | 12 mg/l |
| 3 Jan 2024, 10:40 | 11.2 | 11.2 mg/l |
| 4 Dec 2023, 10:55 | 11.3 | 11.3 mg/l |
| 1 Nov 2023, 11:09 | 6.16 | 6.16 mg/l |
Water temperature
code 0076 · °C
16.2 °C
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 16.2 | 16.2 °C |
| 18 Jun 2026, 09:43 | 16.1 | 16.1 °C |
| 22 May 2026, 11:52 | 15.1 | 15.1 °C |
| 11 May 2026, 13:38 | 11.3 | 11.3 °C |
| 16 Apr 2026, 13:16 | 12.1 | 12.1 °C |
| 16 Apr 2026, 13:15 | 11.8 | 11.8 °C |
| 27 Mar 2026, 10:36 | 9 | 9 °C |
| 24 Mar 2026, 09:46 | 9.6 | 9.6 °C |
| 4 Mar 2026, 11:58 | 8.8 | 8.8 °C |
| 19 Feb 2026, 12:11 | 6.6 | 6.6 °C |
| 12 Feb 2026, 10:14 | 7.8 | 7.8 °C |
| 16 Dec 2025, 09:08 | 8.9 | 8.9 °C |
| 4 Dec 2025, 10:57 | 7.5 | 7.5 °C |
| 27 Nov 2025, 13:21 | 8.8 | 8.8 °C |
| 11 Jun 2025, 10:31 | 14.9 | 14.9 °C |
| 27 May 2025, 12:40 | 13 | 13 °C |
| 22 Apr 2025, 09:03 | 9.2 | 9.2 °C |
| 22 Apr 2025, 09:00 | 9.2 | 9.2 °C |
| 25 Feb 2025, 10:08 | 7.5 | 7.5 °C |
| 21 Jan 2025, 09:57 | 7.5 | 7.5 °C |
| 5 Dec 2024, 08:53 | 8.3 | 8.3 °C |
| 29 Nov 2024, 08:53 | 5.4 | 5.4 °C |
| 17 Oct 2024, 11:59 | 12.7 | 12.7 °C |
| 16 Sep 2024, 13:36 | 12 | 12 °C |
| 23 Aug 2024, 10:56 | 14.4 | 14.4 °C |
| 15 Jul 2024, 10:11 | 12.6 | 12.6 °C |
| 1 Mar 2024, 12:12 | 7 | 7 °C |
| 7 Feb 2024, 09:46 | 6.1 | 6.1 °C |
| 3 Jan 2024, 10:40 | 7.7 | 7.7 °C |
| 4 Dec 2023, 10:55 | 5.7 | 5.7 °C |
| 1 Nov 2023, 11:09 | 11.3 | 11.3 °C |
pH
code 0061
8.56
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 8.56 | 8.56 |
| 18 Jun 2026, 09:43 | 8.16 | 8.16 |
| 22 May 2026, 11:52 | 8.36 | 8.36 |
| 11 May 2026, 13:38 | 8.44 | 8.44 |
| 16 Apr 2026, 13:16 | 8.5 | 8.5 |
| 16 Apr 2026, 13:15 | 8.51 | 8.51 |
| 27 Mar 2026, 10:36 | 8.15 | 8.15 |
| 24 Mar 2026, 09:46 | 8.08 | 8.08 |
| 4 Mar 2026, 11:58 | 8.28 | 8.28 |
| 19 Feb 2026, 12:11 | 8.07 | 8.07 |
| 12 Feb 2026, 10:14 | 7.93 | 7.93 |
| 16 Dec 2025, 09:08 | 7.95 | 7.95 |
| 4 Dec 2025, 10:57 | 7.63 | 7.63 |
| 27 Nov 2025, 13:21 | 7.72 | 7.72 |
| 11 Jun 2025, 10:31 | 8.47 | 8.47 |
| 27 May 2025, 12:40 | 8.32 | 8.32 |
| 22 Apr 2025, 09:03 | 8.19 | 8.19 |
| 22 Apr 2025, 09:00 | 8.2 | 8.2 |
| 25 Feb 2025, 10:08 | 8.13 | 8.13 |
| 21 Jan 2025, 09:57 | 8.01 | 8.01 |
| 5 Dec 2024, 08:53 | 7.96 | 7.96 |
| 29 Nov 2024, 08:53 | 7.94 | 7.94 |
| 17 Oct 2024, 11:59 | 7.93 | 7.93 |
| 16 Sep 2024, 13:36 | 7.56 | 7.56 |
| 23 Aug 2024, 10:56 | 8.08 | 8.08 |
| 15 Jul 2024, 10:11 | 8.4 | 8.4 |
| 1 Mar 2024, 12:12 | 8.3 | 8.3 |
| 7 Feb 2024, 09:46 | 7.84 | 7.84 |
| 3 Jan 2024, 10:40 | 7.96 | 7.96 |
| 4 Dec 2023, 10:55 | 7.89 | 7.89 |
| 1 Nov 2023, 11:09 | 7.41 | 7.41 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.35 mg/l
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 0.35 | 0.35 mg/l |
| 18 Jun 2026, 09:43 | 0.063 | 0.063 mg/l |
| 22 May 2026, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 May 2026, 13:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 13:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Mar 2026, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Mar 2026, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 11:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2026, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Feb 2026, 10:14 | 0.035 | 0.035 mg/l |
| 16 Dec 2025, 09:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2025, 10:57 | 0.54 | 0.54 mg/l |
| 27 Nov 2025, 13:21 | 0.079 | 0.079 mg/l |
| 11 Jun 2025, 10:31 | 0.085 | 0.085 mg/l |
| 27 May 2025, 12:40 | 0.049 | 0.049 mg/l |
| 22 Apr 2025, 09:03 | 0.051 | 0.051 mg/l |
| 22 Apr 2025, 09:00 | 0.043 | 0.043 mg/l |
| 25 Feb 2025, 10:08 | 0.054 | 0.054 mg/l |
| 21 Jan 2025, 09:57 | 0.057 | 0.057 mg/l |
| 5 Dec 2024, 08:53 | 0.11 | 0.11 mg/l |
| 29 Nov 2024, 08:53 | 0.094 | 0.094 mg/l |
| 17 Oct 2024, 11:59 | 0.031 | 0.031 mg/l |
| 16 Sep 2024, 13:36 | 0.68 | 0.68 mg/l |
| 23 Aug 2024, 10:56 | 0.08 | 0.08 mg/l |
| 15 Jul 2024, 10:11 | 0.074 | 0.074 mg/l |
| 1 Mar 2024, 12:12 | 0.05 | 0.05 mg/l |
| 7 Feb 2024, 09:46 | 0.031 | 0.031 mg/l |
| 3 Jan 2024, 10:40 | 0.044 | 0.044 mg/l |
| 4 Dec 2023, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Nov 2023, 11:09 | 0.22 | 0.22 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.33 mg/l
Sampled 15 Jul 2026, 3 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 9.33 | 9.33 mg/l |
| 18 Jun 2026, 09:43 | 11.9 | 11.9 mg/l |
| 22 May 2026, 11:52 | 13 | 13 mg/l |
| 11 May 2026, 13:38 | 13 | 13 mg/l |
| 16 Apr 2026, 13:16 | 13 | 13 mg/l |
| 16 Apr 2026, 13:15 | 13 | 13 mg/l |
| 27 Mar 2026, 10:36 | 14 | 14 mg/l |
| 24 Mar 2026, 09:46 | 14 | 14 mg/l |
| 4 Mar 2026, 11:58 | 14 | 14 mg/l |
| 19 Feb 2026, 12:11 | 14 | 14 mg/l |
| 12 Feb 2026, 10:14 | 13 | 13 mg/l |
| 16 Dec 2025, 09:08 | 13 | 13 mg/l |
| 4 Dec 2025, 10:57 | 9.56 | 9.56 mg/l |
| 27 Nov 2025, 13:21 | 4.06 | 4.06 mg/l |
| 11 Jun 2025, 10:31 | 12 | 12 mg/l |
| 27 May 2025, 12:40 | 13 | 13 mg/l |
| 22 Apr 2025, 09:03 | 13 | 13 mg/l |
| 22 Apr 2025, 09:00 | 13 | 13 mg/l |
| 25 Feb 2025, 10:08 | 14 | 14 mg/l |
| 21 Jan 2025, 09:57 | 15 | 15 mg/l |
| 29 Nov 2024, 08:53 | 12 | 12 mg/l |
| 17 Oct 2024, 11:59 | 12 | 12 mg/l |
| 16 Sep 2024, 13:36 | 9.36 | 9.36 mg/l |
| 23 Aug 2024, 10:56 | 11.9 | 11.9 mg/l |
| 15 Jul 2024, 10:11 | 12 | 12 mg/l |
| 1 Mar 2024, 12:12 | 14 | 14 mg/l |
| 7 Feb 2024, 09:46 | 15 | 15 mg/l |
| 3 Jan 2024, 10:40 | 13 | 13 mg/l |
| 4 Dec 2023, 10:55 | 11 | 11 mg/l |
| 1 Nov 2023, 11:09 | 5.26 | 5.26 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.06 mg/l
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 0.06 | 0.06 mg/l |
| 18 Jun 2026, 09:43 | 0.012 | 0.012 mg/l |
| 22 May 2026, 11:52 | 0.011 | 0.011 mg/l |
| 11 May 2026, 13:38 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Apr 2026, 13:16 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Apr 2026, 13:15 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Mar 2026, 10:36 | <0.01 | below 0.01 mg/l (not detected above this) |
| 24 Mar 2026, 09:46 | 0.013 | 0.013 mg/l |
| 4 Mar 2026, 11:58 | 0.027 | 0.027 mg/l |
| 19 Feb 2026, 12:11 | 0.031 | 0.031 mg/l |
| 12 Feb 2026, 10:14 | 0.039 | 0.039 mg/l |
| 16 Dec 2025, 09:08 | 0.055 | 0.055 mg/l |
| 4 Dec 2025, 10:57 | 0.047 | 0.047 mg/l |
| 27 Nov 2025, 13:21 | 0.066 | 0.066 mg/l |
| 11 Jun 2025, 10:31 | 0.029 | 0.029 mg/l |
| 27 May 2025, 12:40 | 0.023 | 0.023 mg/l |
| 22 Apr 2025, 09:03 | 0.02 | 0.02 mg/l |
| 22 Apr 2025, 09:00 | 0.018 | 0.018 mg/l |
| 25 Feb 2025, 10:08 | 0.028 | 0.028 mg/l |
| 21 Jan 2025, 09:57 | 0.037 | 0.037 mg/l |
| 5 Dec 2024, 08:53 | 0.066 | 0.066 mg/l |
| 29 Nov 2024, 08:53 | 0.095 | 0.095 mg/l |
| 17 Oct 2024, 11:59 | 0.062 | 0.062 mg/l |
| 16 Sep 2024, 13:36 | 0.092 | 0.092 mg/l |
| 23 Aug 2024, 10:56 | 0.042 | 0.042 mg/l |
| 15 Jul 2024, 10:11 | 0.034 | 0.034 mg/l |
| 1 Mar 2024, 12:12 | 0.031 | 0.031 mg/l |
| 7 Feb 2024, 09:46 | 0.041 | 0.041 mg/l |
| 3 Jan 2024, 10:40 | 0.068 | 0.068 mg/l |
| 4 Dec 2023, 10:55 | 0.049 | 0.049 mg/l |
| 1 Nov 2023, 11:09 | 0.087 | 0.087 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
673 µS/cm
Sampled 15 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jul 2026, 08:57 | 673 | 673 µS/cm |
| 18 Jun 2026, 09:43 | 643 | 643 µS/cm |
| 22 May 2026, 11:52 | 612 | 612 µS/cm |
| 11 May 2026, 13:38 | 591 | 591 µS/cm |
| 16 Apr 2026, 13:16 | 616 | 616 µS/cm |
| 16 Apr 2026, 13:15 | 623 | 623 µS/cm |
| 27 Mar 2026, 10:36 | 631 | 631 µS/cm |
| 24 Mar 2026, 09:46 | 630 | 630 µS/cm |
| 4 Mar 2026, 11:58 | 641 | 641 µS/cm |
| 19 Feb 2026, 12:11 | 643 | 643 µS/cm |
| 12 Feb 2026, 10:14 | 628 | 628 µS/cm |
| 16 Dec 2025, 09:08 | 633 | 633 µS/cm |
| 4 Dec 2025, 10:57 | 909 | 909 µS/cm |
| 27 Nov 2025, 13:21 | 818 | 818 µS/cm |
| 11 Jun 2025, 10:31 | 641 | 641 µS/cm |
| 27 May 2025, 12:40 | 614 | 614 µS/cm |
| 22 Apr 2025, 09:03 | 626 | 626 µS/cm |
| 22 Apr 2025, 09:00 | 626 | 626 µS/cm |
| 25 Feb 2025, 10:08 | 636 | 636 µS/cm |
| 21 Jan 2025, 09:57 | 638 | 638 µS/cm |
| 5 Dec 2024, 08:53 | 633 | 633 µS/cm |
| 29 Nov 2024, 08:53 | 668 | 668 µS/cm |
| 17 Oct 2024, 11:59 | 646 | 646 µS/cm |
| 16 Sep 2024, 13:36 | 685 | 685 µS/cm |
| 23 Aug 2024, 10:56 | 621 | 621 µS/cm |
| 15 Jul 2024, 10:11 | 674 | 674 µS/cm |
| 1 Mar 2024, 12:12 | 637 | 637 µS/cm |
| 7 Feb 2024, 09:46 | 650 | 650 µS/cm |
| 3 Jan 2024, 10:40 | 632 | 632 µS/cm |
| 4 Dec 2023, 10:55 | 620 | 620 µS/cm |
| 1 Nov 2023, 11:09 | 674 | 674 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 | Nov 2023 – Jul 2026 | 48.2% 15 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Nov 2023 – Jul 2026 | 4.72 mg/l 15 Jul 2026 |
| Temperature of Water 0076 | River water | 31 | Nov 2023 – Jul 2026 | 16.2 °C 15 Jul 2026 |
| pH 0061 | River water | 31 | Nov 2023 – Jul 2026 | 8.56 15 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Nov 2023 – Jul 2026 | 0.35 mg/l 15 Jul 2026 |
| Nitrate as N 0117 | River water | 30 | Nov 2023 – Jul 2026 | 9.33 mg/l 15 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Nov 2023 – Jul 2026 | 0.06 mg/l 15 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Nov 2023 – Jul 2026 | 673 µS/cm 15 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 31 | Nov 2023 – Jul 2026 | 230 mg/l 15 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Nov 2023 – Jul 2026 | 0.01 mg/l 15 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Jul 2024 – May 2026 | 1.1 mg/l 22 May 2026 |
| Nitrite as N 0118 | River water | 31 | Nov 2023 – Jul 2026 | 0.47 mg/l 15 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Nov 2023 – Jul 2026 | 9.8 mg/l 15 Jul 2026 |
| No flow /No sample 7668 | River water | 6 | Jul 2025 – Aug 2026 | No flow/discharge at sampling point 26 Aug 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.