Baldon Brook above River Thame
EA name: BALDON BROOK ABOVE RIVER THAME
Environment Agency sampling point TH-PTAR0002 · 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
- 19 Aug 2026, 14:0343 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 33 since 9 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 457600, 198700As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Baldon Brook
- River, by the map
- Baldon BrookPlaced on the river its name gives, 23 m from the line.
- Next gauge downstream
- Stadhampton On the River Thame · 3.4 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (33 samples)
2 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
65.5%
Sampled 25 Jun 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 65.5 | 65.5% |
| 15 May 2026, 13:17 | 88.7 | 88.7% |
| 27 Apr 2026, 13:59 | 94.7 | 94.7% |
| 5 Mar 2026, 11:30 | 92.7 | 92.7% |
| 19 Feb 2026, 12:45 | 89.9 | 89.9% |
| 6 Jan 2026, 14:04 | 93.6 | 93.6% |
| 4 Dec 2025, 08:32 | 89.4 | 89.4% |
| 11 Nov 2025, 14:01 | 82.5 | 82.5% |
| 13 Oct 2025, 10:35 | 83.8 | 83.8% |
| 12 Sep 2025, 08:29 | 84.7 | 84.7% |
| 15 Aug 2025, 14:02 | 95 | 95% |
| 30 Jul 2025, 13:56 | 83.9 | 83.9% |
| 27 Jun 2025, 12:59 | 88.4 | 88.4% |
| 28 May 2025, 14:03 | 74.5 | 74.5% |
| 30 Apr 2025, 13:54 | 98.2 | 98.2% |
| 3 Mar 2025, 08:42 | 89.1 | 89.1% |
| 10 Feb 2025, 15:14 | 89.1 | 89.1% |
| 7 Jan 2025, 14:38 | 92.2 | 92.2% |
| 5 Dec 2024, 13:28 | 90 | 90% |
| 14 Nov 2024, 08:33 | 91.6 | 91.6% |
| 1 Oct 2024, 08:58 | 85.9 | 85.9% |
| 2 Sep 2024, 14:22 | 82.9 | 82.9% |
| 7 Aug 2024, 11:42 | 87.6 | 87.6% |
| 11 Jul 2024, 14:28 | 89 | 89% |
| 24 Jun 2024, 12:12 | 85.2 | 85.2% |
| 7 Mar 2024, 13:36 | 94.9 | 94.9% |
| 7 Feb 2024, 14:35 | 84.6 | 84.6% |
| 16 Jan 2024, 14:28 | 92.7 | 92.7% |
| 5 Dec 2023, 10:15 | 82.7 | 82.7% |
| 1 Nov 2023, 12:54 | 77.9 | 77.9% |
| 9 Oct 2023, 13:04 | 87 | 87% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.84 mg/l
Sampled 25 Jun 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 5.84 | 5.84 mg/l |
| 15 May 2026, 13:17 | 9.9 | 9.9 mg/l |
| 27 Apr 2026, 13:59 | 9.71 | 9.71 mg/l |
| 5 Mar 2026, 11:30 | 10.8 | 10.8 mg/l |
| 19 Feb 2026, 12:45 | 11.2 | 11.2 mg/l |
| 6 Jan 2026, 14:04 | 13.2 | 13.2 mg/l |
| 4 Dec 2025, 08:32 | 10.7 | 10.7 mg/l |
| 11 Nov 2025, 14:01 | 8.99 | 8.99 mg/l |
| 13 Oct 2025, 10:35 | 9.22 | 9.22 mg/l |
| 12 Sep 2025, 08:29 | 9.07 | 9.07 mg/l |
| 15 Aug 2025, 14:02 | 8.58 | 8.58 mg/l |
| 30 Jul 2025, 13:56 | 8.02 | 8.02 mg/l |
| 27 Jun 2025, 12:59 | 8.18 | 8.18 mg/l |
| 28 May 2025, 14:03 | 7.54 | 7.54 mg/l |
| 30 Apr 2025, 13:54 | 9.86 | 9.86 mg/l |
| 3 Mar 2025, 08:42 | 12.1 | 12.1 mg/l |
| 10 Feb 2025, 15:14 | 11.4 | 11.4 mg/l |
| 7 Jan 2025, 14:38 | 11.7 | 11.7 mg/l |
| 5 Dec 2024, 13:28 | 10.1 | 10.1 mg/l |
| 14 Nov 2024, 08:33 | 10.4 | 10.4 mg/l |
| 1 Oct 2024, 08:58 | 9.15 | 9.15 mg/l |
| 2 Sep 2024, 14:22 | 7.8 | 7.8 mg/l |
| 7 Aug 2024, 11:42 | 8.7 | 8.7 mg/l |
| 11 Jul 2024, 14:28 | 8.8 | 8.8 mg/l |
| 24 Jun 2024, 12:12 | 8.26 | 8.26 mg/l |
| 7 Mar 2024, 13:36 | 11.3 | 11.3 mg/l |
| 7 Feb 2024, 14:35 | 10.1 | 10.1 mg/l |
| 16 Jan 2024, 14:28 | 12.4 | 12.4 mg/l |
| 5 Dec 2023, 10:15 | 10.2 | 10.2 mg/l |
| 1 Nov 2023, 12:54 | 8.4 | 8.4 mg/l |
| 9 Oct 2023, 13:04 | 8.75 | 8.75 mg/l |
Water temperature
code 0076 · °C
20.9 °C
Sampled 25 Jun 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 20.9 | 20.9 °C |
| 15 May 2026, 13:17 | 10.4 | 10.4 °C |
| 27 Apr 2026, 13:59 | 14.1 | 14.1 °C |
| 5 Mar 2026, 11:30 | 8.5 | 8.5 °C |
| 19 Feb 2026, 12:45 | 5.9 | 5.9 °C |
| 6 Jan 2026, 14:04 | 1.3 | 1.3 °C |
| 4 Dec 2025, 08:32 | 7.5 | 7.5 °C |
| 11 Nov 2025, 14:01 | 11.4 | 11.4 °C |
| 13 Oct 2025, 10:35 | 11 | 11 °C |
| 12 Sep 2025, 08:29 | 12.2 | 12.2 °C |
| 15 Aug 2025, 14:02 | 20.2 | 20.2 °C |
| 30 Jul 2025, 13:56 | 17.4 | 17.4 °C |
| 27 Jun 2025, 12:59 | 19 | 19 °C |
| 28 May 2025, 14:03 | 14.7 | 14.7 °C |
| 30 Apr 2025, 13:54 | 15.1 | 15.1 °C |
| 3 Mar 2025, 08:42 | 2.5 | 2.5 °C |
| 10 Feb 2025, 15:14 | 4.8 | 4.8 °C |
| 7 Jan 2025, 14:38 | 5.2 | 5.2 °C |
| 5 Dec 2024, 13:28 | 10.2 | 10.2 °C |
| 14 Nov 2024, 08:33 | 9.5 | 9.5 °C |
| 1 Oct 2024, 08:58 | 12.4 | 12.4 °C |
| 2 Sep 2024, 14:22 | 18.2 | 18.2 °C |
| 7 Aug 2024, 11:42 | 15.6 | 15.6 °C |
| 11 Jul 2024, 14:28 | 15.8 | 15.8 °C |
| 24 Jun 2024, 12:12 | 16.7 | 16.7 °C |
| 7 Mar 2024, 13:36 | 7.6 | 7.6 °C |
| 7 Feb 2024, 14:35 | 7.5 | 7.5 °C |
| 16 Jan 2024, 14:28 | 3.1 | 3.1 °C |
| 5 Dec 2023, 10:15 | 6.4 | 6.4 °C |
| 1 Nov 2023, 12:54 | 11.9 | 11.9 °C |
| 9 Oct 2023, 13:04 | 15 | 15 °C |
pH
code 0061
7.9
Sampled 25 Jun 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 7.9 | 7.9 |
| 15 May 2026, 13:17 | 8.05 | 8.05 |
| 27 Apr 2026, 13:59 | 8.11 | 8.11 |
| 5 Mar 2026, 11:30 | 7.87 | 7.87 |
| 19 Feb 2026, 12:45 | 7.64 | 7.64 |
| 6 Jan 2026, 14:04 | 8.23 | 8.23 |
| 4 Dec 2025, 08:32 | 7.74 | 7.74 |
| 11 Nov 2025, 14:01 | 8.61 | 8.61 |
| 13 Oct 2025, 10:35 | 8.06 | 8.06 |
| 12 Sep 2025, 08:29 | 8.05 | 8.05 |
| 15 Aug 2025, 14:02 | 8.08 | 8.08 |
| 30 Jul 2025, 13:56 | 7.97 | 7.97 |
| 27 Jun 2025, 12:59 | 8.05 | 8.05 |
| 28 May 2025, 14:03 | 7.87 | 7.87 |
| 30 Apr 2025, 13:54 | 8.05 | 8.05 |
| 3 Mar 2025, 08:42 | 7.94 | 7.94 |
| 10 Feb 2025, 15:14 | 7.45 | 7.45 |
| 7 Jan 2025, 14:38 | 7.62 | 7.62 |
| 5 Dec 2024, 13:28 | 7.64 | 7.64 |
| 14 Nov 2024, 08:33 | 7.98 | 7.98 |
| 1 Oct 2024, 08:58 | 7.53 | 7.53 |
| 2 Sep 2024, 14:22 | 8.02 | 8.02 |
| 7 Aug 2024, 11:42 | 8.09 | 8.09 |
| 11 Jul 2024, 14:28 | 8.16 | 8.16 |
| 24 Jun 2024, 12:12 | 8.04 | 8.04 |
| 7 Mar 2024, 13:36 | 7.97 | 7.97 |
| 7 Feb 2024, 14:35 | 7.42 | 7.42 |
| 16 Jan 2024, 14:28 | 7.99 | 7.99 |
| 5 Dec 2023, 10:15 | 7.36 | 7.36 |
| 1 Nov 2023, 12:54 | 7.18 | 7.18 |
| 9 Oct 2023, 13:04 | 8.03 | 8.03 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.072 mg/l
Sampled 25 Jun 2026, 3 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 0.072 | 0.072 mg/l |
| 15 May 2026, 13:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Apr 2026, 13:59 | 0.03 | 0.03 mg/l |
| 5 Mar 2026, 11:30 | 0.06 | 0.06 mg/l |
| 19 Feb 2026, 12:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 14:04 | 0.058 | 0.058 mg/l |
| 4 Dec 2025, 08:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Nov 2025, 14:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Oct 2025, 10:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Sep 2025, 08:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2025, 14:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jul 2025, 13:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Jun 2025, 12:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 May 2025, 14:03 | 0.083 | 0.083 mg/l |
| 30 Apr 2025, 13:54 | 0.031 | 0.031 mg/l |
| 3 Mar 2025, 08:42 | 0.068 | 0.068 mg/l |
| 10 Feb 2025, 15:14 | 0.051 | 0.051 mg/l |
| 7 Jan 2025, 14:38 | 0.034 | 0.034 mg/l |
| 14 Nov 2024, 08:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Oct 2024, 08:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Sep 2024, 14:22 | 0.058 | 0.058 mg/l |
| 7 Aug 2024, 11:42 | 0.062 | 0.062 mg/l |
| 11 Jul 2024, 14:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2024, 12:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2024, 13:36 | 0.057 | 0.057 mg/l |
| 7 Feb 2024, 14:35 | 0.058 | 0.058 mg/l |
| 16 Jan 2024, 14:28 | 0.044 | 0.044 mg/l |
| 5 Dec 2023, 10:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Nov 2023, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2023, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.234 mg/l
Sampled 25 Jun 2026, 3 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 0.234 | 0.234 mg/l |
| 15 May 2026, 13:17 | 2.99 | 2.99 mg/l |
| 27 Apr 2026, 13:59 | 3.79 | 3.79 mg/l |
| 5 Mar 2026, 11:30 | 7.37 | 7.37 mg/l |
| 19 Feb 2026, 12:45 | 4.8 | 4.8 mg/l |
| 6 Jan 2026, 14:04 | 8.78 | 8.78 mg/l |
| 4 Dec 2025, 08:32 | 19 | 19 mg/l |
| 11 Nov 2025, 14:01 | 30 | 30 mg/l |
| 13 Oct 2025, 10:35 | 0.606 | 0.606 mg/l |
| 12 Sep 2025, 08:29 | 4.98 | 4.98 mg/l |
| 15 Aug 2025, 14:02 | <0.196 | below 0.196 mg/l (not detected above this) |
| 30 Jul 2025, 13:56 | 0.276 | 0.276 mg/l |
| 27 Jun 2025, 12:59 | 0.316 | 0.316 mg/l |
| 28 May 2025, 14:03 | 2.82 | 2.82 mg/l |
| 30 Apr 2025, 13:54 | 3.57 | 3.57 mg/l |
| 3 Mar 2025, 08:42 | 6.98 | 6.98 mg/l |
| 10 Feb 2025, 15:14 | 5.19 | 5.19 mg/l |
| 7 Jan 2025, 14:38 | 7.38 | 7.38 mg/l |
| 14 Nov 2024, 08:33 | 5.47 | 5.47 mg/l |
| 1 Oct 2024, 08:58 | 8.27 | 8.27 mg/l |
| 2 Sep 2024, 14:22 | 0.504 | 0.504 mg/l |
| 7 Aug 2024, 11:42 | 1.89 | 1.89 mg/l |
| 11 Jul 2024, 14:28 | 5.98 | 5.98 mg/l |
| 24 Jun 2024, 12:12 | 3.09 | 3.09 mg/l |
| 7 Mar 2024, 13:36 | 8.07 | 8.07 mg/l |
| 7 Feb 2024, 14:35 | 6.29 | 6.29 mg/l |
| 16 Jan 2024, 14:28 | 9.78 | 9.78 mg/l |
| 5 Dec 2023, 10:15 | 8.99 | 8.99 mg/l |
| 1 Nov 2023, 12:54 | 11 | 11 mg/l |
| 9 Oct 2023, 13:04 | 3.6 | 3.6 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.43 mg/l
Sampled 25 Jun 2026, 3 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 0.43 | 0.43 mg/l |
| 15 May 2026, 13:17 | 0.1 | 0.1 mg/l |
| 27 Apr 2026, 13:59 | 0.1 | 0.1 mg/l |
| 5 Mar 2026, 11:30 | 0.13 | 0.13 mg/l |
| 19 Feb 2026, 12:45 | 0.14 | 0.14 mg/l |
| 6 Jan 2026, 14:04 | 0.13 | 0.13 mg/l |
| 4 Dec 2025, 08:32 | 0.083 | 0.083 mg/l |
| 11 Nov 2025, 14:01 | 0.18 | 0.18 mg/l |
| 13 Oct 2025, 10:35 | 0.17 | 0.17 mg/l |
| 12 Sep 2025, 08:29 | 0.15 | 0.15 mg/l |
| 15 Aug 2025, 14:02 | 0.35 | 0.35 mg/l |
| 30 Jul 2025, 13:56 | 0.24 | 0.24 mg/l |
| 27 Jun 2025, 12:59 | 0.4 | 0.4 mg/l |
| 28 May 2025, 14:03 | 0.2 | 0.2 mg/l |
| 30 Apr 2025, 13:54 | 0.15 | 0.15 mg/l |
| 3 Mar 2025, 08:42 | 0.1 | 0.1 mg/l |
| 10 Feb 2025, 15:14 | 0.068 | 0.068 mg/l |
| 7 Jan 2025, 14:38 | 0.15 | 0.15 mg/l |
| 14 Nov 2024, 08:33 | 0.14 | 0.14 mg/l |
| 1 Oct 2024, 08:58 | 0.12 | 0.12 mg/l |
| 2 Sep 2024, 14:22 | 0.21 | 0.21 mg/l |
| 7 Aug 2024, 11:42 | 0.24 | 0.24 mg/l |
| 11 Jul 2024, 14:28 | 0.2 | 0.2 mg/l |
| 24 Jun 2024, 12:12 | 0.18 | 0.18 mg/l |
| 7 Mar 2024, 13:36 | 0.13 | 0.13 mg/l |
| 7 Feb 2024, 14:35 | 0.12 | 0.12 mg/l |
| 16 Jan 2024, 14:28 | 0.15 | 0.15 mg/l |
| 5 Dec 2023, 10:15 | 0.1 | 0.1 mg/l |
| 1 Nov 2023, 12:54 | 0.095 | 0.095 mg/l |
| 9 Oct 2023, 13:04 | 0.23 | 0.23 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
707 µS/cm
Sampled 25 Jun 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 25 Jun 2026, 08:36 | 707 | 707 µS/cm |
| 15 May 2026, 13:17 | 727 | 727 µS/cm |
| 27 Apr 2026, 13:59 | 731 | 731 µS/cm |
| 5 Mar 2026, 11:30 | 706 | 706 µS/cm |
| 19 Feb 2026, 12:45 | 416 | 416 µS/cm |
| 6 Jan 2026, 14:04 | 791 | 791 µS/cm |
| 4 Dec 2025, 08:32 | 738 | 738 µS/cm |
| 11 Nov 2025, 14:01 | 801 | 801 µS/cm |
| 13 Oct 2025, 10:35 | 723 | 723 µS/cm |
| 12 Sep 2025, 08:29 | 695 | 695 µS/cm |
| 15 Aug 2025, 14:02 | 679 | 679 µS/cm |
| 30 Jul 2025, 13:56 | 709 | 709 µS/cm |
| 27 Jun 2025, 12:59 | 694 | 694 µS/cm |
| 28 May 2025, 14:03 | 685 | 685 µS/cm |
| 30 Apr 2025, 13:54 | 740 | 740 µS/cm |
| 3 Mar 2025, 08:42 | 715 | 715 µS/cm |
| 10 Feb 2025, 15:14 | 401 | 401 µS/cm |
| 7 Jan 2025, 14:38 | 551 | 551 µS/cm |
| 5 Dec 2024, 13:28 | 462 | 462 µS/cm |
| 14 Nov 2024, 08:33 | 761 | 761 µS/cm |
| 1 Oct 2024, 08:58 | 569 | 569 µS/cm |
| 2 Sep 2024, 14:22 | 725 | 725 µS/cm |
| 7 Aug 2024, 11:42 | 743 | 743 µS/cm |
| 11 Jul 2024, 14:28 | 729 | 729 µS/cm |
| 24 Jun 2024, 12:12 | 745 | 745 µS/cm |
| 7 Mar 2024, 13:36 | 693 | 693 µS/cm |
| 7 Feb 2024, 14:35 | 422 | 422 µS/cm |
| 16 Jan 2024, 14:28 | 764 | 764 µS/cm |
| 5 Dec 2023, 10:15 | 496 | 496 µS/cm |
| 1 Nov 2023, 12:54 | 508 | 508 µS/cm |
| 9 Oct 2023, 13:04 | 768 | 768 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 – Jun 2026 | 65.5% 25 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Oct 2023 – Jun 2026 | 5.84 mg/l 25 Jun 2026 |
| Temperature of Water 0076 | River water | 31 | Oct 2023 – Jun 2026 | 20.9 °C 25 Jun 2026 |
| pH 0061 | River water | 31 | Oct 2023 – Jun 2026 | 7.9 25 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Oct 2023 – Jun 2026 | 0.072 mg/l 25 Jun 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – Jun 2026 | 0.234 mg/l 25 Jun 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Oct 2023 – Jun 2026 | 0.43 mg/l 25 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Oct 2023 – Jun 2026 | 707 µS/cm 25 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – Jun 2026 | 300 mg/l 25 Jun 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – Jun 2026 | 0.00232 mg/l 25 Jun 2026 |
| BOD : 5 Day ATU 0085 | River water | 27 | Oct 2023 – Mar 2026 | 1.3 mg/l 5 Mar 2026 |
| Nitrite as N 0118 | River water | 30 | Oct 2023 – Jun 2026 | 0.0063 mg/l 25 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Oct 2023 – Jun 2026 | 0.24 mg/l 25 Jun 2026 |
| No flow /No sample 7668 | River water | 2 | Jul 2026 – Aug 2026 | No flow/discharge at sampling point 19 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.