Cole at Acorn Bridge, Bourton

EA name: COLE AT ACORN BRIDGE, BOURTON
Environment Agency sampling point TH-PUTR0023 · 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
24 Aug 2026, 12:0138 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
22 since 13 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 421600, 187300As published, to the nearest 100 m (so up to about 70 m out). Open in a map
River, by its own name
Cole
River, by the map
River ColePlaced on the river its name gives, 61 m from the line.
Next gauge downstream
Inglesham On the River Cole · 16 km along the river
Nearest gauge upstream
Kestrel Drive On the Dorcan Brook · 4.0 km along the river
Why it was sampled
Environmental monitoring statutory (EU directives) (22 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

87.6%

Sampled 24 Aug 2026, 38 days ago · 22 results banked

708090100%20242025202613 Jun 2024, 09:45: 94.2%4 Jul 2024, 10:32: 92.1%9 Aug 2024, 11:35: 90.6%9 Sep 2024, 09:42: 78.7%16 Oct 2024, 09:58: 86.4%14 Nov 2024, 09:38: 90.6%11 Dec 2024, 09:17: 94.5%14 Jan 2025, 10:54: 98.4%5 Feb 2025, 11:14: 95%13 Mar 2025, 09:27: 98.9%30 Apr 2025, 08:43: 88.2%15 Oct 2025, 10:41: 82.3%6 Nov 2025, 09:10: 71.8%2 Dec 2025, 13:21: 83.6%26 Jan 2026, 13:17: 88.5%10 Feb 2026, 10:05: 91.5%4 Mar 2026, 10:26: 95.1%20 Apr 2026, 10:06: 98.8%27 May 2026, 11:42: 83.1%18 Jun 2026, 14:42: 93.1%28 Jul 2026, 10:28: 82.3%24 Aug 2026, 12:01: 87.6%
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:0187.6 87.6%
28 Jul 2026, 10:2882.3 82.3%
18 Jun 2026, 14:4293.1 93.1%
27 May 2026, 11:4283.1 83.1%
20 Apr 2026, 10:0698.8 98.8%
4 Mar 2026, 10:2695.1 95.1%
10 Feb 2026, 10:0591.5 91.5%
26 Jan 2026, 13:1788.5 88.5%
2 Dec 2025, 13:2183.6 83.6%
6 Nov 2025, 09:1071.8 71.8%
15 Oct 2025, 10:4182.3 82.3%
30 Apr 2025, 08:4388.2 88.2%
13 Mar 2025, 09:2798.9 98.9%
5 Feb 2025, 11:1495 95%
14 Jan 2025, 10:5498.4 98.4%
11 Dec 2024, 09:1794.5 94.5%
14 Nov 2024, 09:3890.6 90.6%
16 Oct 2024, 09:5886.4 86.4%
9 Sep 2024, 09:4278.7 78.7%
9 Aug 2024, 11:3590.6 90.6%
4 Jul 2024, 10:3292.1 92.1%
13 Jun 2024, 09:4594.2 94.2%

Dissolved oxygen

as O2 · code 9924 · mg/l

8.95 mg/l

Sampled 24 Aug 2026, 38 days ago · 22 results banked

68101214mg/l20242025202613 Jun 2024, 09:45: 10.3 mg/l4 Jul 2024, 10:32: 9.66 mg/l9 Aug 2024, 11:35: 8.81 mg/l9 Sep 2024, 09:42: 7.83 mg/l16 Oct 2024, 09:58: 9.02 mg/l14 Nov 2024, 09:38: 10.3 mg/l11 Dec 2024, 09:17: 11.4 mg/l14 Jan 2025, 10:54: 11.9 mg/l5 Feb 2025, 11:14: 11.5 mg/l13 Mar 2025, 09:27: 12.1 mg/l30 Apr 2025, 08:43: 9.57 mg/l15 Oct 2025, 10:41: 8.99 mg/l6 Nov 2025, 09:10: 7.58 mg/l2 Dec 2025, 13:21: 9.67 mg/l26 Jan 2026, 13:17: 10.5 mg/l10 Feb 2026, 10:05: 10.7 mg/l4 Mar 2026, 10:26: 11.1 mg/l20 Apr 2026, 10:06: 11.5 mg/l27 May 2026, 11:42: 7.74 mg/l18 Jun 2026, 14:42: 8.85 mg/l28 Jul 2026, 10:28: 7.77 mg/l24 Aug 2026, 12:01: 8.95 mg/l
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:018.95 8.95 mg/l
28 Jul 2026, 10:287.77 7.77 mg/l
18 Jun 2026, 14:428.85 8.85 mg/l
27 May 2026, 11:427.74 7.74 mg/l
20 Apr 2026, 10:0611.5 11.5 mg/l
4 Mar 2026, 10:2611.1 11.1 mg/l
10 Feb 2026, 10:0510.7 10.7 mg/l
26 Jan 2026, 13:1710.5 10.5 mg/l
2 Dec 2025, 13:219.67 9.67 mg/l
6 Nov 2025, 09:107.58 7.58 mg/l
15 Oct 2025, 10:418.99 8.99 mg/l
30 Apr 2025, 08:439.57 9.57 mg/l
13 Mar 2025, 09:2712.1 12.1 mg/l
5 Feb 2025, 11:1411.5 11.5 mg/l
14 Jan 2025, 10:5411.9 11.9 mg/l
11 Dec 2024, 09:1711.4 11.4 mg/l
14 Nov 2024, 09:3810.3 10.3 mg/l
16 Oct 2024, 09:589.02 9.02 mg/l
9 Sep 2024, 09:427.83 7.83 mg/l
9 Aug 2024, 11:358.81 8.81 mg/l
4 Jul 2024, 10:329.66 9.66 mg/l
13 Jun 2024, 09:4510.3 10.3 mg/l

Water temperature

code 0076 · °C

14.3 °C

Sampled 24 Aug 2026, 38 days ago · 22 results banked

5101520°C20242025202613 Jun 2024, 09:45: 11.1 °C4 Jul 2024, 10:32: 13.1 °C9 Aug 2024, 11:35: 16.6 °C9 Sep 2024, 09:42: 15.5 °C16 Oct 2024, 09:58: 13.3 °C14 Nov 2024, 09:38: 9.8 °C11 Dec 2024, 09:17: 7.2 °C14 Jan 2025, 10:54: 7.1 °C5 Feb 2025, 11:14: 6.9 °C13 Mar 2025, 09:27: 6.5 °C30 Apr 2025, 08:43: 11.6 °C15 Oct 2025, 10:41: 11.3 °C6 Nov 2025, 09:10: 12.8 °C2 Dec 2025, 13:21: 8.9 °C26 Jan 2026, 13:17: 7.9 °C10 Feb 2026, 10:05: 8.4 °C4 Mar 2026, 10:26: 8.7 °C20 Apr 2026, 10:06: 8.5 °C27 May 2026, 11:42: 18.7 °C18 Jun 2026, 14:42: 17.7 °C28 Jul 2026, 10:28: 18 °C24 Aug 2026, 12:01: 14.3 °C
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:0114.3 14.3 °C
28 Jul 2026, 10:2818 18 °C
18 Jun 2026, 14:4217.7 17.7 °C
27 May 2026, 11:4218.7 18.7 °C
20 Apr 2026, 10:068.5 8.5 °C
4 Mar 2026, 10:268.7 8.7 °C
10 Feb 2026, 10:058.4 8.4 °C
26 Jan 2026, 13:177.9 7.9 °C
2 Dec 2025, 13:218.9 8.9 °C
6 Nov 2025, 09:1012.8 12.8 °C
15 Oct 2025, 10:4111.3 11.3 °C
30 Apr 2025, 08:4311.6 11.6 °C
13 Mar 2025, 09:276.5 6.5 °C
5 Feb 2025, 11:146.9 6.9 °C
14 Jan 2025, 10:547.1 7.1 °C
11 Dec 2024, 09:177.2 7.2 °C
14 Nov 2024, 09:389.8 9.8 °C
16 Oct 2024, 09:5813.3 13.3 °C
9 Sep 2024, 09:4215.5 15.5 °C
9 Aug 2024, 11:3516.6 16.6 °C
4 Jul 2024, 10:3213.1 13.1 °C
13 Jun 2024, 09:4511.1 11.1 °C

pH

code 0061

8.13

Sampled 24 Aug 2026, 38 days ago · 22 results banked

7.67.888.28.420242025202613 Jun 2024, 09:45: 8.294 Jul 2024, 10:32: 8.259 Aug 2024, 11:35: 8.19 Sep 2024, 09:42: 7.7816 Oct 2024, 09:58: 7.8514 Nov 2024, 09:38: 8.1611 Dec 2024, 09:17: 8.0714 Jan 2025, 10:54: 8.225 Feb 2025, 11:14: 8.1813 Mar 2025, 09:27: 8.330 Apr 2025, 08:43: 8.1615 Oct 2025, 10:41: 8.216 Nov 2025, 09:10: 7.772 Dec 2025, 13:21: 7.8426 Jan 2026, 13:17: 7.9510 Feb 2026, 10:05: 8.024 Mar 2026, 10:26: 8.2520 Apr 2026, 10:06: 8.1727 May 2026, 11:42: 7.9518 Jun 2026, 14:42: 8.1528 Jul 2026, 10:28: 824 Aug 2026, 12:01: 8.13
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:018.13 8.13
28 Jul 2026, 10:288 8
18 Jun 2026, 14:428.15 8.15
27 May 2026, 11:427.95 7.95
20 Apr 2026, 10:068.17 8.17
4 Mar 2026, 10:268.25 8.25
10 Feb 2026, 10:058.02 8.02
26 Jan 2026, 13:177.95 7.95
2 Dec 2025, 13:217.84 7.84
6 Nov 2025, 09:107.77 7.77
15 Oct 2025, 10:418.21 8.21
30 Apr 2025, 08:438.16 8.16
13 Mar 2025, 09:278.3 8.3
5 Feb 2025, 11:148.18 8.18
14 Jan 2025, 10:548.22 8.22
11 Dec 2024, 09:178.07 8.07
14 Nov 2024, 09:388.16 8.16
16 Oct 2024, 09:587.85 7.85
9 Sep 2024, 09:427.78 7.78
9 Aug 2024, 11:358.1 8.1
4 Jul 2024, 10:328.25 8.25
13 Jun 2024, 09:458.29 8.29

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

below 0.03 mg/l (not detected above this)

Sampled 24 Aug 2026, 38 days ago · 22 results banked

0.0250.050.0750.10.1250.15mg/l20242025202613 Jun 2024, 09:45: below 0.03 mg/l (not detected above this)4 Jul 2024, 10:32: below 0.03 mg/l (not detected above this)9 Aug 2024, 11:35: below 0.03 mg/l (not detected above this)9 Sep 2024, 09:42: 0.053 mg/l16 Oct 2024, 09:58: below 0.03 mg/l (not detected above this)14 Nov 2024, 09:38: below 0.03 mg/l (not detected above this)11 Dec 2024, 09:17: below 0.03 mg/l (not detected above this)14 Jan 2025, 10:54: below 0.03 mg/l (not detected above this)5 Feb 2025, 11:14: below 0.03 mg/l (not detected above this)13 Mar 2025, 09:27: below 0.03 mg/l (not detected above this)30 Apr 2025, 08:43: below 0.03 mg/l (not detected above this)15 Oct 2025, 10:41: 0.036 mg/l6 Nov 2025, 09:10: below 0.03 mg/l (not detected above this)2 Dec 2025, 13:21: 0.043 mg/l26 Jan 2026, 13:17: 0.032 mg/l10 Feb 2026, 10:05: 0.036 mg/l4 Mar 2026, 10:26: below 0.03 mg/l (not detected above this)20 Apr 2026, 10:06: below 0.03 mg/l (not detected above this)27 May 2026, 11:42: 0.13 mg/l18 Jun 2026, 14:42: below 0.03 mg/l (not detected above this)28 Jul 2026, 10:28: 0.034 mg/l24 Aug 2026, 12:01: below 0.03 mg/l (not detected above this)
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:01<0.03 below 0.03 mg/l (not detected above this)
28 Jul 2026, 10:280.034 0.034 mg/l
18 Jun 2026, 14:42<0.03 below 0.03 mg/l (not detected above this)
27 May 2026, 11:420.13 0.13 mg/l
20 Apr 2026, 10:06<0.03 below 0.03 mg/l (not detected above this)
4 Mar 2026, 10:26<0.03 below 0.03 mg/l (not detected above this)
10 Feb 2026, 10:050.036 0.036 mg/l
26 Jan 2026, 13:170.032 0.032 mg/l
2 Dec 2025, 13:210.043 0.043 mg/l
6 Nov 2025, 09:10<0.03 below 0.03 mg/l (not detected above this)
15 Oct 2025, 10:410.036 0.036 mg/l
30 Apr 2025, 08:43<0.03 below 0.03 mg/l (not detected above this)
13 Mar 2025, 09:27<0.03 below 0.03 mg/l (not detected above this)
5 Feb 2025, 11:14<0.03 below 0.03 mg/l (not detected above this)
14 Jan 2025, 10:54<0.03 below 0.03 mg/l (not detected above this)
11 Dec 2024, 09:17<0.03 below 0.03 mg/l (not detected above this)
14 Nov 2024, 09:38<0.03 below 0.03 mg/l (not detected above this)
16 Oct 2024, 09:58<0.03 below 0.03 mg/l (not detected above this)
9 Sep 2024, 09:420.053 0.053 mg/l
9 Aug 2024, 11:35<0.03 below 0.03 mg/l (not detected above this)
4 Jul 2024, 10:32<0.03 below 0.03 mg/l (not detected above this)
13 Jun 2024, 09:45<0.03 below 0.03 mg/l (not detected above this)

Nitrate

as nitrogen (N) · code 0117 · mg/l

4.8 mg/l

Sampled 24 Aug 2026, 38 days ago · 22 results banked

23456mg/l20242025202613 Jun 2024, 09:45: 5.77 mg/l4 Jul 2024, 10:32: 5.86 mg/l9 Aug 2024, 11:35: 5.58 mg/l9 Sep 2024, 09:42: 5.36 mg/l16 Oct 2024, 09:58: 2.98 mg/l14 Nov 2024, 09:38: 5.09 mg/l11 Dec 2024, 09:17: 4.59 mg/l14 Jan 2025, 10:54: 5.49 mg/l5 Feb 2025, 11:14: 5.49 mg/l13 Mar 2025, 09:27: 5.98 mg/l30 Apr 2025, 08:43: 5.99 mg/l15 Oct 2025, 10:41: 3.18 mg/l6 Nov 2025, 09:10: 3.58 mg/l2 Dec 2025, 13:21: 5.78 mg/l26 Jan 2026, 13:17: 4.79 mg/l10 Feb 2026, 10:05: 4.98 mg/l4 Mar 2026, 10:26: 5.69 mg/l20 Apr 2026, 10:06: 5.28 mg/l27 May 2026, 11:42: 4.44 mg/l18 Jun 2026, 14:42: 5.58 mg/l28 Jul 2026, 10:28: 5.29 mg/l24 Aug 2026, 12:01: 4.8 mg/l
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:014.8 4.8 mg/l
28 Jul 2026, 10:285.29 5.29 mg/l
18 Jun 2026, 14:425.58 5.58 mg/l
27 May 2026, 11:424.44 4.44 mg/l
20 Apr 2026, 10:065.28 5.28 mg/l
4 Mar 2026, 10:265.69 5.69 mg/l
10 Feb 2026, 10:054.98 4.98 mg/l
26 Jan 2026, 13:174.79 4.79 mg/l
2 Dec 2025, 13:215.78 5.78 mg/l
6 Nov 2025, 09:103.58 3.58 mg/l
15 Oct 2025, 10:413.18 3.18 mg/l
30 Apr 2025, 08:435.99 5.99 mg/l
13 Mar 2025, 09:275.98 5.98 mg/l
5 Feb 2025, 11:145.49 5.49 mg/l
14 Jan 2025, 10:545.49 5.49 mg/l
11 Dec 2024, 09:174.59 4.59 mg/l
14 Nov 2024, 09:385.09 5.09 mg/l
16 Oct 2024, 09:582.98 2.98 mg/l
9 Sep 2024, 09:425.36 5.36 mg/l
9 Aug 2024, 11:355.58 5.58 mg/l
4 Jul 2024, 10:325.86 5.86 mg/l
13 Jun 2024, 09:455.77 5.77 mg/l

Phosphate

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

0.16 mg/l

Sampled 24 Aug 2026, 38 days ago · 22 results banked

0.050.10.150.2mg/l20242025202613 Jun 2024, 09:45: 0.089 mg/l4 Jul 2024, 10:32: 0.12 mg/l9 Aug 2024, 11:35: 0.14 mg/l9 Sep 2024, 09:42: 0.16 mg/l16 Oct 2024, 09:58: 0.14 mg/l14 Nov 2024, 09:38: 0.11 mg/l11 Dec 2024, 09:17: 0.1 mg/l14 Jan 2025, 10:54: 0.09 mg/l5 Feb 2025, 11:14: 0.088 mg/l13 Mar 2025, 09:27: 0.082 mg/l30 Apr 2025, 08:43: 0.08 mg/l15 Oct 2025, 10:41: 0.17 mg/l6 Nov 2025, 09:10: 0.14 mg/l2 Dec 2025, 13:21: 0.15 mg/l26 Jan 2026, 13:17: 0.13 mg/l10 Feb 2026, 10:05: 0.12 mg/l4 Mar 2026, 10:26: 0.085 mg/l20 Apr 2026, 10:06: 0.061 mg/l27 May 2026, 11:42: 0.15 mg/l18 Jun 2026, 14:42: 0.17 mg/l28 Jul 2026, 10:28: 0.13 mg/l24 Aug 2026, 12:01: 0.16 mg/l
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:010.16 0.16 mg/l
28 Jul 2026, 10:280.13 0.13 mg/l
18 Jun 2026, 14:420.17 0.17 mg/l
27 May 2026, 11:420.15 0.15 mg/l
20 Apr 2026, 10:060.061 0.061 mg/l
4 Mar 2026, 10:260.085 0.085 mg/l
10 Feb 2026, 10:050.12 0.12 mg/l
26 Jan 2026, 13:170.13 0.13 mg/l
2 Dec 2025, 13:210.15 0.15 mg/l
6 Nov 2025, 09:100.14 0.14 mg/l
15 Oct 2025, 10:410.17 0.17 mg/l
30 Apr 2025, 08:430.08 0.08 mg/l
13 Mar 2025, 09:270.082 0.082 mg/l
5 Feb 2025, 11:140.088 0.088 mg/l
14 Jan 2025, 10:540.09 0.09 mg/l
11 Dec 2024, 09:170.1 0.1 mg/l
14 Nov 2024, 09:380.11 0.11 mg/l
16 Oct 2024, 09:580.14 0.14 mg/l
9 Sep 2024, 09:420.16 0.16 mg/l
9 Aug 2024, 11:350.14 0.14 mg/l
4 Jul 2024, 10:320.12 0.12 mg/l
13 Jun 2024, 09:450.089 0.089 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

662 µS/cm

Sampled 24 Aug 2026, 38 days ago · 22 results banked

550600650700750µS/cm20242025202613 Jun 2024, 09:45: 622 µS/cm4 Jul 2024, 10:32: 631 µS/cm9 Aug 2024, 11:35: 659 µS/cm9 Sep 2024, 09:42: 565 µS/cm16 Oct 2024, 09:58: 575 µS/cm14 Nov 2024, 09:38: 662 µS/cm11 Dec 2024, 09:17: 651 µS/cm14 Jan 2025, 10:54: 686 µS/cm5 Feb 2025, 11:14: 661 µS/cm13 Mar 2025, 09:27: 675 µS/cm30 Apr 2025, 08:43: 632 µS/cm15 Oct 2025, 10:41: 620 µS/cm6 Nov 2025, 09:10: 750 µS/cm2 Dec 2025, 13:21: 615 µS/cm26 Jan 2026, 13:17: 628 µS/cm10 Feb 2026, 10:05: 616 µS/cm4 Mar 2026, 10:26: 660 µS/cm20 Apr 2026, 10:06: 614 µS/cm27 May 2026, 11:42: 561 µS/cm18 Jun 2026, 14:42: 639 µS/cm28 Jul 2026, 10:28: 644 µS/cm24 Aug 2026, 12:01: 662 µS/cm
Every result (22)
SampledResult as publishedReads as
24 Aug 2026, 12:01662 662 µS/cm
28 Jul 2026, 10:28644 644 µS/cm
18 Jun 2026, 14:42639 639 µS/cm
27 May 2026, 11:42561 561 µS/cm
20 Apr 2026, 10:06614 614 µS/cm
4 Mar 2026, 10:26660 660 µS/cm
10 Feb 2026, 10:05616 616 µS/cm
26 Jan 2026, 13:17628 628 µS/cm
2 Dec 2025, 13:21615 615 µS/cm
6 Nov 2025, 09:10750 750 µS/cm
15 Oct 2025, 10:41620 620 µS/cm
30 Apr 2025, 08:43632 632 µS/cm
13 Mar 2025, 09:27675 675 µS/cm
5 Feb 2025, 11:14661 661 µS/cm
14 Jan 2025, 10:54686 686 µS/cm
11 Dec 2024, 09:17651 651 µS/cm
14 Nov 2024, 09:38662 662 µS/cm
16 Oct 2024, 09:58575 575 µS/cm
9 Sep 2024, 09:42565 565 µS/cm
9 Aug 2024, 11:35659 659 µS/cm
4 Jul 2024, 10:32631 631 µS/cm
13 Jun 2024, 09:45622 622 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 22 Jun 2024 – Aug 2026 87.6% 24 Aug 2026
Oxygen, Dissolved as O2 9924 River water 22 Jun 2024 – Aug 2026 8.95 mg/l 24 Aug 2026
Temperature of Water 0076 River water 22 Jun 2024 – Aug 2026 14.3 °C 24 Aug 2026
pH 0061 River water 22 Jun 2024 – Aug 2026 8.13 24 Aug 2026
Ammoniacal Nitrogen as N 0111 River water 22 Jun 2024 – Aug 2026 below 0.03 mg/l 24 Aug 2026
Nitrate as N 0117 River water 22 Jun 2024 – Aug 2026 4.8 mg/l 24 Aug 2026
Orthophosphate, reactive as P 0180 River water 22 Jun 2024 – Aug 2026 0.16 mg/l 24 Aug 2026
Conductivity at 25 C 0077 River water 22 Jun 2024 – Aug 2026 662 µS/cm 24 Aug 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 22 Jun 2024 – Aug 2026 210 mg/l 24 Aug 2026
Ammonia un-ionised as N 0119 River water 22 Jun 2024 – Aug 2026 below 0.00075 mg/l 24 Aug 2026
BOD : 5 Day ATU 0085 River water 22 Jun 2024 – Aug 2026 below 4 mg/l 24 Aug 2026
Nitrite as N 0118 River water 22 Jun 2024 – Aug 2026 0.0041 mg/l 24 Aug 2026
Nitrogen, Total Oxidised as N 0116 River water 22 Jun 2024 – Aug 2026 4.8 mg/l 24 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.