Baughurst Brook below Ashford Hill Tip

EA name: BAUGHURST BROOK BELOW ASHFORD HILL TIP
Environment Agency sampling point TH-PKER0005 · 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
4 Sep 2026, 10:0927 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
23 since 26 Jun 2024 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 455600, 163100As published, to the nearest 100 m (so up to about 70 m out). Open in a map
River, by its own name
Baughurst Brook
River, by the map
Baughurst BrookPlaced on the river its name gives, 44 m from the line.
Next gauge downstream
Brimpton On the River Enborne · 2.5 km along the river
Why it was sampled
Environmental monitoring statutory (EU directives) (23 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

72.8%

Sampled 4 Sep 2026, 27 days ago · 23 results banked

60708090100%20242025202626 Jun 2024, 11:35: 76.1%24 Jul 2024, 10:42: 62.8%15 Aug 2024, 09:19: 69.2%3 Sep 2024, 10:26: 66.7%8 Oct 2024, 13:34: 89.2%13 Nov 2024, 10:58: 79.9%4 Dec 2024, 11:33: 94.7%13 Jan 2025, 12:09: 99.2%4 Feb 2025, 12:19: 99.4%5 Mar 2025, 11:37: 98.4%23 Apr 2025, 11:28: 89.6%22 Oct 2025, 10:43: 60.5%11 Nov 2025, 14:54: 72%2 Dec 2025, 12:17: 89.7%5 Jan 2026, 13:18: 94.6%11 Feb 2026, 12:14: 91.4%17 Mar 2026, 11:33: 94.8%20 Apr 2026, 12:02: 95.3%27 May 2026, 12:24: 71.4%30 Jun 2026, 10:54: 91.3%17 Jul 2026, 11:01: 99.4%17 Aug 2026, 12:15: 85.2%4 Sep 2026, 10:09: 72.8%
Every result (23)
SampledResult as publishedReads as
4 Sep 2026, 10:0972.8 72.8%
17 Aug 2026, 12:1585.2 85.2%
17 Jul 2026, 11:0199.4 99.4%
30 Jun 2026, 10:5491.3 91.3%
27 May 2026, 12:2471.4 71.4%
20 Apr 2026, 12:0295.3 95.3%
17 Mar 2026, 11:3394.8 94.8%
11 Feb 2026, 12:1491.4 91.4%
5 Jan 2026, 13:1894.6 94.6%
2 Dec 2025, 12:1789.7 89.7%
11 Nov 2025, 14:5472 72%
22 Oct 2025, 10:4360.5 60.5%
23 Apr 2025, 11:2889.6 89.6%
5 Mar 2025, 11:3798.4 98.4%
4 Feb 2025, 12:1999.4 99.4%
13 Jan 2025, 12:0999.2 99.2%
4 Dec 2024, 11:3394.7 94.7%
13 Nov 2024, 10:5879.9 79.9%
8 Oct 2024, 13:3489.2 89.2%
3 Sep 2024, 10:2666.7 66.7%
15 Aug 2024, 09:1969.2 69.2%
24 Jul 2024, 10:4262.8 62.8%
26 Jun 2024, 11:3576.1 76.1%

Dissolved oxygen

as O2 · code 9924 · mg/l

6.93 mg/l

Sampled 4 Sep 2026, 27 days ago · 23 results banked

68101214mg/l20242025202626 Jun 2024, 11:35: 7.4 mg/l24 Jul 2024, 10:42: 6.14 mg/l15 Aug 2024, 09:19: 7.05 mg/l3 Sep 2024, 10:26: 6.5 mg/l8 Oct 2024, 13:34: 9.36 mg/l13 Nov 2024, 10:58: 9.38 mg/l4 Dec 2024, 11:33: 11.7 mg/l13 Jan 2025, 12:09: 13 mg/l4 Feb 2025, 12:19: 12.2 mg/l5 Mar 2025, 11:37: 12.5 mg/l23 Apr 2025, 11:28: 10 mg/l22 Oct 2025, 10:43: 6.64 mg/l11 Nov 2025, 14:54: 7.85 mg/l2 Dec 2025, 12:17: 10.4 mg/l5 Jan 2026, 13:18: 13.4 mg/l11 Feb 2026, 12:14: 10.5 mg/l17 Mar 2026, 11:33: 10.8 mg/l20 Apr 2026, 12:02: 10.8 mg/l27 May 2026, 12:24: 6.69 mg/l30 Jun 2026, 10:54: 8.84 mg/l17 Jul 2026, 11:01: 9.44 mg/l17 Aug 2026, 12:15: 7.87 mg/l4 Sep 2026, 10:09: 6.93 mg/l
Every result (23)
SampledResult as publishedReads as
4 Sep 2026, 10:096.93 6.93 mg/l
17 Aug 2026, 12:157.87 7.87 mg/l
17 Jul 2026, 11:019.44 9.44 mg/l
30 Jun 2026, 10:548.84 8.84 mg/l
27 May 2026, 12:246.69 6.69 mg/l
20 Apr 2026, 12:0210.8 10.8 mg/l
17 Mar 2026, 11:3310.8 10.8 mg/l
11 Feb 2026, 12:1410.5 10.5 mg/l
5 Jan 2026, 13:1813.4 13.4 mg/l
2 Dec 2025, 12:1710.4 10.4 mg/l
11 Nov 2025, 14:547.85 7.85 mg/l
22 Oct 2025, 10:436.64 6.64 mg/l
23 Apr 2025, 11:2810 10 mg/l
5 Mar 2025, 11:3712.5 12.5 mg/l
4 Feb 2025, 12:1912.2 12.2 mg/l
13 Jan 2025, 12:0913 13 mg/l
4 Dec 2024, 11:3311.7 11.7 mg/l
13 Nov 2024, 10:589.38 9.38 mg/l
8 Oct 2024, 13:349.36 9.36 mg/l
3 Sep 2024, 10:266.5 6.5 mg/l
15 Aug 2024, 09:197.05 7.05 mg/l
24 Jul 2024, 10:426.14 6.14 mg/l
26 Jun 2024, 11:357.4 7.4 mg/l

Water temperature

code 0076 · °C

17.6 °C

Sampled 4 Sep 2026, 27 days ago · 23 results banked

05101520°C20242025202626 Jun 2024, 11:35: 16.6 °C24 Jul 2024, 10:42: 16.3 °C15 Aug 2024, 09:19: 14.4 °C3 Sep 2024, 10:26: 16.5 °C8 Oct 2024, 13:34: 13.1 °C13 Nov 2024, 10:58: 8.3 °C4 Dec 2024, 11:33: 6.4 °C13 Jan 2025, 12:09: 3.9 °C4 Feb 2025, 12:19: 6.4 °C5 Mar 2025, 11:37: 5.2 °C23 Apr 2025, 11:28: 10.4 °C22 Oct 2025, 10:43: 11.1 °C11 Nov 2025, 14:54: 11.4 °C2 Dec 2025, 12:17: 8.8 °C5 Jan 2026, 13:18: 1 °C11 Feb 2026, 12:14: 9.1 °C17 Mar 2026, 11:33: 9.7 °C20 Apr 2026, 12:02: 9.9 °C27 May 2026, 12:24: 18.4 °C30 Jun 2026, 10:54: 16.8 °C17 Jul 2026, 11:01: 17.7 °C17 Aug 2026, 12:15: 19.1 °C4 Sep 2026, 10:09: 17.6 °C
Every result (23)
SampledResult as publishedReads as
4 Sep 2026, 10:0917.6 17.6 °C
17 Aug 2026, 12:1519.1 19.1 °C
17 Jul 2026, 11:0117.7 17.7 °C
30 Jun 2026, 10:5416.8 16.8 °C
27 May 2026, 12:2418.4 18.4 °C
20 Apr 2026, 12:029.9 9.9 °C
17 Mar 2026, 11:339.7 9.7 °C
11 Feb 2026, 12:149.1 9.1 °C
5 Jan 2026, 13:181 1 °C
2 Dec 2025, 12:178.8 8.8 °C
11 Nov 2025, 14:5411.4 11.4 °C
22 Oct 2025, 10:4311.1 11.1 °C
23 Apr 2025, 11:2810.4 10.4 °C
5 Mar 2025, 11:375.2 5.2 °C
4 Feb 2025, 12:196.4 6.4 °C
13 Jan 2025, 12:093.9 3.9 °C
4 Dec 2024, 11:336.4 6.4 °C
13 Nov 2024, 10:588.3 8.3 °C
8 Oct 2024, 13:3413.1 13.1 °C
3 Sep 2024, 10:2616.5 16.5 °C
15 Aug 2024, 09:1914.4 14.4 °C
24 Jul 2024, 10:4216.3 16.3 °C
26 Jun 2024, 11:3516.6 16.6 °C

pH

code 0061

7.93

Sampled 4 Sep 2026, 27 days ago · 23 results banked

7.47.67.888.220242025202626 Jun 2024, 11:35: 7.7724 Jul 2024, 10:42: 7.815 Aug 2024, 09:19: 7.823 Sep 2024, 10:26: 7.78 Oct 2024, 13:34: 7.613 Nov 2024, 10:58: 7.584 Dec 2024, 11:33: 7.7513 Jan 2025, 12:09: 7.784 Feb 2025, 12:19: 7.845 Mar 2025, 11:37: 7.9423 Apr 2025, 11:28: 7.922 Oct 2025, 10:43: 7.411 Nov 2025, 14:54: 7.432 Dec 2025, 12:17: 7.65 Jan 2026, 13:18: 7.8111 Feb 2026, 12:14: 7.517 Mar 2026, 11:33: 7.7620 Apr 2026, 12:02: 7.9727 May 2026, 12:24: 7.6930 Jun 2026, 10:54: 8.0317 Jul 2026, 11:01: 8.0617 Aug 2026, 12:15: 7.444 Sep 2026, 10:09: 7.93
Every result (23)
SampledResult as publishedReads as
4 Sep 2026, 10:097.93 7.93
17 Aug 2026, 12:157.44 7.44
17 Jul 2026, 11:018.06 8.06
30 Jun 2026, 10:548.03 8.03
27 May 2026, 12:247.69 7.69
20 Apr 2026, 12:027.97 7.97
17 Mar 2026, 11:337.76 7.76
11 Feb 2026, 12:147.5 7.5
5 Jan 2026, 13:187.81 7.81
2 Dec 2025, 12:177.6 7.6
11 Nov 2025, 14:547.43 7.43
22 Oct 2025, 10:437.4 7.4
23 Apr 2025, 11:287.9 7.9
5 Mar 2025, 11:377.94 7.94
4 Feb 2025, 12:197.84 7.84
13 Jan 2025, 12:097.78 7.78
4 Dec 2024, 11:337.75 7.75
13 Nov 2024, 10:587.58 7.58
8 Oct 2024, 13:347.6 7.6
3 Sep 2024, 10:267.7 7.7
15 Aug 2024, 09:197.82 7.82
24 Jul 2024, 10:427.8 7.8
26 Jun 2024, 11:357.77 7.77

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

below 0.03 mg/l (not detected above this)

Sampled 4 Sep 2026, 27 days ago · 22 results banked

00.10.20.3mg/l20242025202626 Jun 2024, 11:35: 0.06 mg/l24 Jul 2024, 10:42: 0.094 mg/l15 Aug 2024, 09:19: 0.061 mg/l3 Sep 2024, 10:26: 0.048 mg/l8 Oct 2024, 13:34: below 0.03 mg/l (not detected above this)13 Nov 2024, 10:58: 0.034 mg/l4 Dec 2024, 11:33: 0.043 mg/l13 Jan 2025, 12:09: 0.069 mg/l4 Feb 2025, 12:19: 0.054 mg/l5 Mar 2025, 11:37: 0.056 mg/l22 Oct 2025, 10:43: 0.034 mg/l11 Nov 2025, 14:54: below 0.03 mg/l (not detected above this)2 Dec 2025, 12:17: below 0.03 mg/l (not detected above this)5 Jan 2026, 13:18: 0.067 mg/l11 Feb 2026, 12:14: below 0.03 mg/l (not detected above this)17 Mar 2026, 11:33: below 0.03 mg/l (not detected above this)20 Apr 2026, 12:02: 0.035 mg/l27 May 2026, 12:24: 0.25 mg/l30 Jun 2026, 10:54: 0.048 mg/l17 Jul 2026, 11:01: below 0.03 mg/l (not detected above this)17 Aug 2026, 12:15: 0.075 mg/l4 Sep 2026, 10:09: below 0.03 mg/l (not detected above this)
Every result (22)
SampledResult as publishedReads as
4 Sep 2026, 10:09<0.03 below 0.03 mg/l (not detected above this)
17 Aug 2026, 12:150.075 0.075 mg/l
17 Jul 2026, 11:01<0.03 below 0.03 mg/l (not detected above this)
30 Jun 2026, 10:540.048 0.048 mg/l
27 May 2026, 12:240.25 0.25 mg/l
20 Apr 2026, 12:020.035 0.035 mg/l
17 Mar 2026, 11:33<0.03 below 0.03 mg/l (not detected above this)
11 Feb 2026, 12:14<0.03 below 0.03 mg/l (not detected above this)
5 Jan 2026, 13:180.067 0.067 mg/l
2 Dec 2025, 12:17<0.03 below 0.03 mg/l (not detected above this)
11 Nov 2025, 14:54<0.03 below 0.03 mg/l (not detected above this)
22 Oct 2025, 10:430.034 0.034 mg/l
5 Mar 2025, 11:370.056 0.056 mg/l
4 Feb 2025, 12:190.054 0.054 mg/l
13 Jan 2025, 12:090.069 0.069 mg/l
4 Dec 2024, 11:330.043 0.043 mg/l
13 Nov 2024, 10:580.034 0.034 mg/l
8 Oct 2024, 13:34<0.03 below 0.03 mg/l (not detected above this)
3 Sep 2024, 10:260.048 0.048 mg/l
15 Aug 2024, 09:190.061 0.061 mg/l
24 Jul 2024, 10:420.094 0.094 mg/l
26 Jun 2024, 11:350.06 0.06 mg/l

Nitrate

as nitrogen (N) · code 0117 · mg/l

1.57 mg/l

Sampled 4 Sep 2026, 27 days ago · 22 results banked

0123mg/l20242025202626 Jun 2024, 11:35: 2.58 mg/l24 Jul 2024, 10:42: 1.08 mg/l15 Aug 2024, 09:19: 1.28 mg/l3 Sep 2024, 10:26: 0.901 mg/l8 Oct 2024, 13:34: 1.19 mg/l13 Nov 2024, 10:58: 0.604 mg/l4 Dec 2024, 11:33: 0.992 mg/l13 Jan 2025, 12:09: 1.39 mg/l4 Feb 2025, 12:19: 1.89 mg/l5 Mar 2025, 11:37: 2.58 mg/l22 Oct 2025, 10:43: 1.19 mg/l11 Nov 2025, 14:54: 1.49 mg/l2 Dec 2025, 12:17: 2.99 mg/l5 Jan 2026, 13:18: 1.39 mg/l11 Feb 2026, 12:14: 1.2 mg/l17 Mar 2026, 11:33: 1.2 mg/l20 Apr 2026, 12:02: 1.49 mg/l27 May 2026, 12:24: 1.62 mg/l30 Jun 2026, 10:54: 2.55 mg/l17 Jul 2026, 11:01: 2.2 mg/l17 Aug 2026, 12:15: 1.89 mg/l4 Sep 2026, 10:09: 1.57 mg/l
Every result (22)
SampledResult as publishedReads as
4 Sep 2026, 10:091.57 1.57 mg/l
17 Aug 2026, 12:151.89 1.89 mg/l
17 Jul 2026, 11:012.2 2.2 mg/l
30 Jun 2026, 10:542.55 2.55 mg/l
27 May 2026, 12:241.62 1.62 mg/l
20 Apr 2026, 12:021.49 1.49 mg/l
17 Mar 2026, 11:331.2 1.2 mg/l
11 Feb 2026, 12:141.2 1.2 mg/l
5 Jan 2026, 13:181.39 1.39 mg/l
2 Dec 2025, 12:172.99 2.99 mg/l
11 Nov 2025, 14:541.49 1.49 mg/l
22 Oct 2025, 10:431.19 1.19 mg/l
5 Mar 2025, 11:372.58 2.58 mg/l
4 Feb 2025, 12:191.89 1.89 mg/l
13 Jan 2025, 12:091.39 1.39 mg/l
4 Dec 2024, 11:330.992 0.992 mg/l
13 Nov 2024, 10:580.604 0.604 mg/l
8 Oct 2024, 13:341.19 1.19 mg/l
3 Sep 2024, 10:260.901 0.901 mg/l
15 Aug 2024, 09:191.28 1.28 mg/l
24 Jul 2024, 10:421.08 1.08 mg/l
26 Jun 2024, 11:352.58 2.58 mg/l

Phosphate

orthophosphate, reactive, as P · code 0180 · mg/l

0.054 mg/l

Sampled 4 Sep 2026, 27 days ago · 21 results banked

00.20.40.60.8mg/l20242025202626 Jun 2024, 11:35: 0.067 mg/l24 Jul 2024, 10:42: 0.13 mg/l15 Aug 2024, 09:19: 0.095 mg/l3 Sep 2024, 10:26: 0.1 mg/l8 Oct 2024, 13:34: 0.08 mg/l13 Nov 2024, 10:58: 0.069 mg/l13 Jan 2025, 12:09: 0.058 mg/l4 Feb 2025, 12:19: 0.029 mg/l5 Mar 2025, 11:37: 0.011 mg/l22 Oct 2025, 10:43: 0.2 mg/l11 Nov 2025, 14:54: 0.11 mg/l2 Dec 2025, 12:17: 0.057 mg/l5 Jan 2026, 13:18: 0.051 mg/l11 Feb 2026, 12:14: 0.059 mg/l17 Mar 2026, 11:33: 0.04 mg/l20 Apr 2026, 12:02: 0.038 mg/l27 May 2026, 12:24: 0.19 mg/l30 Jun 2026, 10:54: 0.04 mg/l17 Jul 2026, 11:01: 0.033 mg/l17 Aug 2026, 12:15: 0.76 mg/l4 Sep 2026, 10:09: 0.054 mg/l
Every result (21)
SampledResult as publishedReads as
4 Sep 2026, 10:090.054 0.054 mg/l
17 Aug 2026, 12:150.76 0.76 mg/l
17 Jul 2026, 11:010.033 0.033 mg/l
30 Jun 2026, 10:540.04 0.04 mg/l
27 May 2026, 12:240.19 0.19 mg/l
20 Apr 2026, 12:020.038 0.038 mg/l
17 Mar 2026, 11:330.04 0.04 mg/l
11 Feb 2026, 12:140.059 0.059 mg/l
5 Jan 2026, 13:180.051 0.051 mg/l
2 Dec 2025, 12:170.057 0.057 mg/l
11 Nov 2025, 14:540.11 0.11 mg/l
22 Oct 2025, 10:430.2 0.2 mg/l
5 Mar 2025, 11:370.011 0.011 mg/l
4 Feb 2025, 12:190.029 0.029 mg/l
13 Jan 2025, 12:090.058 0.058 mg/l
13 Nov 2024, 10:580.069 0.069 mg/l
8 Oct 2024, 13:340.08 0.08 mg/l
3 Sep 2024, 10:260.1 0.1 mg/l
15 Aug 2024, 09:190.095 0.095 mg/l
24 Jul 2024, 10:420.13 0.13 mg/l
26 Jun 2024, 11:350.067 0.067 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

730 µS/cm

Sampled 4 Sep 2026, 27 days ago · 23 results banked

200400600800µS/cm20242025202626 Jun 2024, 11:35: 542 µS/cm24 Jul 2024, 10:42: 517 µS/cm15 Aug 2024, 09:19: 617 µS/cm3 Sep 2024, 10:26: 619 µS/cm8 Oct 2024, 13:34: 322 µS/cm13 Nov 2024, 10:58: 394 µS/cm4 Dec 2024, 11:33: 340 µS/cm13 Jan 2025, 12:09: 364 µS/cm4 Feb 2025, 12:19: 355 µS/cm5 Mar 2025, 11:37: 398 µS/cm23 Apr 2025, 11:28: 470 µS/cm22 Oct 2025, 10:43: 486 µS/cm11 Nov 2025, 14:54: 480 µS/cm2 Dec 2025, 12:17: 380 µS/cm5 Jan 2026, 13:18: 400 µS/cm11 Feb 2026, 12:14: 243 µS/cm17 Mar 2026, 11:33: 335 µS/cm20 Apr 2026, 12:02: 427 µS/cm27 May 2026, 12:24: 572 µS/cm30 Jun 2026, 10:54: 722 µS/cm17 Jul 2026, 11:01: 697 µS/cm17 Aug 2026, 12:15: 794 µS/cm4 Sep 2026, 10:09: 730 µS/cm
Every result (23)
SampledResult as publishedReads as
4 Sep 2026, 10:09730 730 µS/cm
17 Aug 2026, 12:15794 794 µS/cm
17 Jul 2026, 11:01697 697 µS/cm
30 Jun 2026, 10:54722 722 µS/cm
27 May 2026, 12:24572 572 µS/cm
20 Apr 2026, 12:02427 427 µS/cm
17 Mar 2026, 11:33335 335 µS/cm
11 Feb 2026, 12:14243 243 µS/cm
5 Jan 2026, 13:18400 400 µS/cm
2 Dec 2025, 12:17380 380 µS/cm
11 Nov 2025, 14:54480 480 µS/cm
22 Oct 2025, 10:43486 486 µS/cm
23 Apr 2025, 11:28470 470 µS/cm
5 Mar 2025, 11:37398 398 µS/cm
4 Feb 2025, 12:19355 355 µS/cm
13 Jan 2025, 12:09364 364 µS/cm
4 Dec 2024, 11:33340 340 µS/cm
13 Nov 2024, 10:58394 394 µS/cm
8 Oct 2024, 13:34322 322 µS/cm
3 Sep 2024, 10:26619 619 µS/cm
15 Aug 2024, 09:19617 617 µS/cm
24 Jul 2024, 10:42517 517 µS/cm
26 Jun 2024, 11:35542 542 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
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 23 Jun 2024 – Sep 2026 72.8% 4 Sep 2026
Oxygen, Dissolved as O2 9924 River water 23 Jun 2024 – Sep 2026 6.93 mg/l 4 Sep 2026
Temperature of Water 0076 River water 23 Jun 2024 – Sep 2026 17.6 °C 4 Sep 2026
pH 0061 River water 23 Jun 2024 – Sep 2026 7.93 4 Sep 2026
Ammoniacal Nitrogen as N 0111 River water 22 Jun 2024 – Sep 2026 below 0.03 mg/l 4 Sep 2026
Nitrate as N 0117 River water 22 Jun 2024 – Sep 2026 1.57 mg/l 4 Sep 2026
Orthophosphate, reactive as P 0180 River water 21 Jun 2024 – Sep 2026 0.054 mg/l 4 Sep 2026
Conductivity at 25 C 0077 River water 23 Jun 2024 – Sep 2026 730 µS/cm 4 Sep 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 22 Jun 2024 – Sep 2026 320 mg/l 4 Sep 2026
Ammonia un-ionised as N 0119 River water 22 Jun 2024 – Sep 2026 below 0.00081 mg/l 4 Sep 2026
BOD : 5 Day ATU 0085 River water 22 Jun 2024 – Sep 2026 6.1 mg/l 4 Sep 2026
Nitrite as N 0118 River water 22 Jun 2024 – Sep 2026 0.027 mg/l 4 Sep 2026
Nitrogen, Total Oxidised as N 0116 River water 22 Jun 2024 – Sep 2026 1.6 mg/l 4 Sep 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.