Tributary of Wendling Beck upstream of Scarning Fen

EA name: TRIB.OF WENDLING BECK U/S SCARNING FEN (also listed as “TRIB.OF WENDLING BECK U/S OF SCARNING FEN”)
Environment Agency sampling point AN-WEN123 · 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
14 Apr 2026, 10:456 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
24 since 18 Oct 2023 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 598846, 311752As published, to the nearest 1 m. Open in a map
River, by its own name
Tributary Wendling Beck
River, by the map
An unnamed streamPlaced by position alone (the only river line close by), 1 m from the line.
Next gauge downstream
Swanton Morley On the River Wensum · 17 km along the river
Why it was sampled
Monitoring (national agency policy) (21 samples)
Planned investigation (local monitoring) (3 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

91.4%

Sampled 14 Apr 2026, 6 months ago · 24 results banked

708090100%20242025202618 Oct 2023, 08:29: 93%28 Nov 2023, 13:03: 91.3%11 Dec 2023, 14:03: 93.4%29 Dec 2023, 11:33: 92.1%19 Jan 2024, 10:01: 91%19 Feb 2024, 11:06: 95.6%15 Mar 2024, 09:03: 98.8%3 Apr 2024, 11:25: 98.9%15 Apr 2024, 12:54: 80.1%15 Apr 2024, 12:55: 80.1%20 May 2024, 10:34: 97.5%18 Jun 2024, 10:39: 86.6%19 Jul 2024, 09:18: 83.6%21 Aug 2024, 09:17: 70.7%30 Sep 2024, 11:50: 90.9%15 Oct 2024, 09:20: 80.4%21 Nov 2024, 10:16: 90.9%6 Dec 2024, 11:42: 88.5%28 Jan 2025, 11:17: 88.3%13 Feb 2025, 11:25: 92.9%4 Aug 2025, 12:53: 88.3%20 Oct 2025, 11:32: 71.1%5 Jan 2026, 13:16: 90.7%14 Apr 2026, 10:45: 91.4%
Every result (24)
SampledResult as publishedReads as
14 Apr 2026, 10:4591.4 91.4%
5 Jan 2026, 13:1690.7 90.7%
20 Oct 2025, 11:3271.1 71.1%
4 Aug 2025, 12:5388.3 88.3%
13 Feb 2025, 11:2592.9 92.9%
28 Jan 2025, 11:1788.3 88.3%
6 Dec 2024, 11:4288.5 88.5%
21 Nov 2024, 10:1690.9 90.9%
15 Oct 2024, 09:2080.4 80.4%
30 Sep 2024, 11:5090.9 90.9%
21 Aug 2024, 09:1770.7 70.7%
19 Jul 2024, 09:1883.6 83.6%
18 Jun 2024, 10:3986.6 86.6%
20 May 2024, 10:3497.5 97.5%
15 Apr 2024, 12:5580.1 80.1%
15 Apr 2024, 12:5480.1 80.1%
3 Apr 2024, 11:2598.9 98.9%
15 Mar 2024, 09:0398.8 98.8%
19 Feb 2024, 11:0695.6 95.6%
19 Jan 2024, 10:0191 91%
29 Dec 2023, 11:3392.1 92.1%
11 Dec 2023, 14:0393.4 93.4%
28 Nov 2023, 13:0391.3 91.3%
18 Oct 2023, 08:2993 93%

Dissolved oxygen

as O2 · code 9924 · mg/l

10.4 mg/l

Sampled 14 Apr 2026, 6 months ago · 24 results banked

68101214mg/l20242025202618 Oct 2023, 08:29: 10.2 mg/l28 Nov 2023, 13:03: 11.1 mg/l11 Dec 2023, 14:03: 11.1 mg/l29 Dec 2023, 11:33: 11 mg/l19 Jan 2024, 10:01: 11.8 mg/l19 Feb 2024, 11:06: 11.1 mg/l15 Mar 2024, 09:03: 10.9 mg/l3 Apr 2024, 11:25: 10.9 mg/l15 Apr 2024, 12:54: 8.92 mg/l15 Apr 2024, 12:55: 8.92 mg/l20 May 2024, 10:34: 10.1 mg/l18 Jun 2024, 10:39: 8.84 mg/l19 Jul 2024, 09:18: 8.06 mg/l21 Aug 2024, 09:17: 7.25 mg/l30 Sep 2024, 11:50: 9.41 mg/l15 Oct 2024, 09:20: 9.02 mg/l21 Nov 2024, 10:16: 12.1 mg/l6 Dec 2024, 11:42: 10.6 mg/l28 Jan 2025, 11:17: 10.7 mg/l13 Feb 2025, 11:25: 11.8 mg/l4 Aug 2025, 12:53: 8.32 mg/l20 Oct 2025, 11:32: 7.37 mg/l5 Jan 2026, 13:16: 12.4 mg/l14 Apr 2026, 10:45: 10.4 mg/l
Every result (24)
SampledResult as publishedReads as
14 Apr 2026, 10:4510.4 10.4 mg/l
5 Jan 2026, 13:1612.4 12.4 mg/l
20 Oct 2025, 11:327.37 7.37 mg/l
4 Aug 2025, 12:538.32 8.32 mg/l
13 Feb 2025, 11:2511.8 11.8 mg/l
28 Jan 2025, 11:1710.7 10.7 mg/l
6 Dec 2024, 11:4210.6 10.6 mg/l
21 Nov 2024, 10:1612.1 12.1 mg/l
15 Oct 2024, 09:209.02 9.02 mg/l
30 Sep 2024, 11:509.41 9.41 mg/l
21 Aug 2024, 09:177.25 7.25 mg/l
19 Jul 2024, 09:188.06 8.06 mg/l
18 Jun 2024, 10:398.84 8.84 mg/l
20 May 2024, 10:3410.1 10.1 mg/l
15 Apr 2024, 12:558.92 8.92 mg/l
15 Apr 2024, 12:548.92 8.92 mg/l
3 Apr 2024, 11:2510.9 10.9 mg/l
15 Mar 2024, 09:0310.9 10.9 mg/l
19 Feb 2024, 11:0611.1 11.1 mg/l
19 Jan 2024, 10:0111.8 11.8 mg/l
29 Dec 2023, 11:3311 11 mg/l
11 Dec 2023, 14:0311.1 11.1 mg/l
28 Nov 2023, 13:0311.1 11.1 mg/l
18 Oct 2023, 08:2910.2 10.2 mg/l

Water temperature

code 0076 · °C

9.6 °C

Sampled 14 Apr 2026, 6 months ago · 24 results banked

05101520°C20242025202618 Oct 2023, 08:29: 11.3 °C28 Nov 2023, 13:03: 7 °C11 Dec 2023, 14:03: 7.8 °C29 Dec 2023, 11:33: 7.5 °C19 Jan 2024, 10:01: 4.5 °C19 Feb 2024, 11:06: 8.9 °C15 Mar 2024, 09:03: 10.8 °C3 Apr 2024, 11:25: 10.9 °C15 Apr 2024, 12:54: 10.5 °C15 Apr 2024, 12:55: 10.5 °C20 May 2024, 10:34: 13.7 °C18 Jun 2024, 10:39: 14.3 °C19 Jul 2024, 09:18: 17 °C21 Aug 2024, 09:17: 14.1 °C30 Sep 2024, 11:50: 13.7 °C15 Oct 2024, 09:20: 10.2 °C21 Nov 2024, 10:16: 3.5 °C6 Dec 2024, 11:42: 7.6 °C28 Jan 2025, 11:17: 7 °C13 Feb 2025, 11:25: 5.1 °C4 Aug 2025, 12:53: 18.1 °C20 Oct 2025, 11:32: 13.6 °C5 Jan 2026, 13:16: 2.3 °C14 Apr 2026, 10:45: 9.6 °C
Every result (24)
SampledResult as publishedReads as
14 Apr 2026, 10:459.6 9.6 °C
5 Jan 2026, 13:162.3 2.3 °C
20 Oct 2025, 11:3213.6 13.6 °C
4 Aug 2025, 12:5318.1 18.1 °C
13 Feb 2025, 11:255.1 5.1 °C
28 Jan 2025, 11:177 7 °C
6 Dec 2024, 11:427.6 7.6 °C
21 Nov 2024, 10:163.5 3.5 °C
15 Oct 2024, 09:2010.2 10.2 °C
30 Sep 2024, 11:5013.7 13.7 °C
21 Aug 2024, 09:1714.1 14.1 °C
19 Jul 2024, 09:1817 17 °C
18 Jun 2024, 10:3914.3 14.3 °C
20 May 2024, 10:3413.7 13.7 °C
15 Apr 2024, 12:5510.5 10.5 °C
15 Apr 2024, 12:5410.5 10.5 °C
3 Apr 2024, 11:2510.9 10.9 °C
15 Mar 2024, 09:0310.8 10.8 °C
19 Feb 2024, 11:068.9 8.9 °C
19 Jan 2024, 10:014.5 4.5 °C
29 Dec 2023, 11:337.5 7.5 °C
11 Dec 2023, 14:037.8 7.8 °C
28 Nov 2023, 13:037 7 °C
18 Oct 2023, 08:2911.3 11.3 °C

pH

code 0061

7.94

Sampled 14 Apr 2026, 6 months ago · 24 results banked

678920242025202618 Oct 2023, 08:29: 8.1128 Nov 2023, 13:03: 711 Dec 2023, 14:03: 8.1329 Dec 2023, 11:33: 7.8419 Jan 2024, 10:01: 8.119 Feb 2024, 11:06: 7.7515 Mar 2024, 09:03: 8.113 Apr 2024, 11:25: 7.3815 Apr 2024, 12:54: 7.9115 Apr 2024, 12:55: 7.9120 May 2024, 10:34: 7.9918 Jun 2024, 10:39: 8.2219 Jul 2024, 09:18: 7.9621 Aug 2024, 09:17: 8.0330 Sep 2024, 11:50: 7.915 Oct 2024, 09:20: 8.0121 Nov 2024, 10:16: 8.056 Dec 2024, 11:42: 7.8428 Jan 2025, 11:17: 8.2713 Feb 2025, 11:25: 6.244 Aug 2025, 12:53: 7.8420 Oct 2025, 11:32: 7.625 Jan 2026, 13:16: 8.0714 Apr 2026, 10:45: 7.94
Every result (24)
SampledResult as publishedReads as
14 Apr 2026, 10:457.94 7.94
5 Jan 2026, 13:168.07 8.07
20 Oct 2025, 11:327.62 7.62
4 Aug 2025, 12:537.84 7.84
13 Feb 2025, 11:256.24 6.24
28 Jan 2025, 11:178.27 8.27
6 Dec 2024, 11:427.84 7.84
21 Nov 2024, 10:168.05 8.05
15 Oct 2024, 09:208.01 8.01
30 Sep 2024, 11:507.9 7.9
21 Aug 2024, 09:178.03 8.03
19 Jul 2024, 09:187.96 7.96
18 Jun 2024, 10:398.22 8.22
20 May 2024, 10:347.99 7.99
15 Apr 2024, 12:557.91 7.91
15 Apr 2024, 12:547.91 7.91
3 Apr 2024, 11:257.38 7.38
15 Mar 2024, 09:038.11 8.11
19 Feb 2024, 11:067.75 7.75
19 Jan 2024, 10:018.1 8.1
29 Dec 2023, 11:337.84 7.84
11 Dec 2023, 14:038.13 8.13
28 Nov 2023, 13:037 7
18 Oct 2023, 08:298.11 8.11

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

0.11 mg/l

Sampled 14 Apr 2026, 6 months ago · 20 results banked

00.511.52mg/l20242025202618 Oct 2023, 08:29: 0.032 mg/l28 Nov 2023, 13:03: 0.17 mg/l11 Dec 2023, 14:03: 0.088 mg/l29 Dec 2023, 11:33: 0.064 mg/l19 Jan 2024, 10:01: 0.079 mg/l19 Feb 2024, 11:06: 0.047 mg/l15 Mar 2024, 09:03: 0.04 mg/l15 Apr 2024, 12:54: 2 mg/l20 May 2024, 10:34: 0.3 mg/l18 Jun 2024, 10:39: 0.24 mg/l19 Jul 2024, 09:18: 0.046 mg/l21 Aug 2024, 09:17: 0.12 mg/l30 Sep 2024, 11:50: 0.53 mg/l15 Oct 2024, 09:20: 0.096 mg/l21 Nov 2024, 10:16: 0.21 mg/l28 Jan 2025, 11:17: 0.61 mg/l4 Aug 2025, 12:53: 0.033 mg/l20 Oct 2025, 11:32: 0.093 mg/l5 Jan 2026, 13:16: 0.12 mg/l14 Apr 2026, 10:45: 0.11 mg/l
Every result (20)
SampledResult as publishedReads as
14 Apr 2026, 10:450.11 0.11 mg/l
5 Jan 2026, 13:160.12 0.12 mg/l
20 Oct 2025, 11:320.093 0.093 mg/l
4 Aug 2025, 12:530.033 0.033 mg/l
28 Jan 2025, 11:170.61 0.61 mg/l
21 Nov 2024, 10:160.21 0.21 mg/l
15 Oct 2024, 09:200.096 0.096 mg/l
30 Sep 2024, 11:500.53 0.53 mg/l
21 Aug 2024, 09:170.12 0.12 mg/l
19 Jul 2024, 09:180.046 0.046 mg/l
18 Jun 2024, 10:390.24 0.24 mg/l
20 May 2024, 10:340.3 0.3 mg/l
15 Apr 2024, 12:542 2 mg/l
15 Mar 2024, 09:030.04 0.04 mg/l
19 Feb 2024, 11:060.047 0.047 mg/l
19 Jan 2024, 10:010.079 0.079 mg/l
29 Dec 2023, 11:330.064 0.064 mg/l
11 Dec 2023, 14:030.088 0.088 mg/l
28 Nov 2023, 13:030.17 0.17 mg/l
18 Oct 2023, 08:290.032 0.032 mg/l

Nitrate

as nitrogen (N) · code 0117 · mg/l

1.16 mg/l

Sampled 14 Apr 2026, 6 months ago · 20 results banked

01234mg/l20242025202618 Oct 2023, 08:29: 0.99 mg/l28 Nov 2023, 13:03: 3.36 mg/l11 Dec 2023, 14:03: 3.17 mg/l29 Dec 2023, 11:33: 2.48 mg/l19 Jan 2024, 10:01: 2.09 mg/l19 Feb 2024, 11:06: 2.28 mg/l15 Mar 2024, 09:03: 1.58 mg/l15 Apr 2024, 12:54: 1.43 mg/l20 May 2024, 10:34: 1.07 mg/l18 Jun 2024, 10:39: 0.733 mg/l19 Jul 2024, 09:18: 0.862 mg/l21 Aug 2024, 09:17: 1.27 mg/l30 Sep 2024, 11:50: 0.744 mg/l15 Oct 2024, 09:20: 1.16 mg/l21 Nov 2024, 10:16: 0.793 mg/l28 Jan 2025, 11:17: 1.35 mg/l4 Aug 2025, 12:53: 0.918 mg/l20 Oct 2025, 11:32: 2.1 mg/l5 Jan 2026, 13:16: 1.38 mg/l14 Apr 2026, 10:45: 1.16 mg/l
Every result (20)
SampledResult as publishedReads as
14 Apr 2026, 10:451.16 1.16 mg/l
5 Jan 2026, 13:161.38 1.38 mg/l
20 Oct 2025, 11:322.1 2.1 mg/l
4 Aug 2025, 12:530.918 0.918 mg/l
28 Jan 2025, 11:171.35 1.35 mg/l
21 Nov 2024, 10:160.793 0.793 mg/l
15 Oct 2024, 09:201.16 1.16 mg/l
30 Sep 2024, 11:500.744 0.744 mg/l
21 Aug 2024, 09:171.27 1.27 mg/l
19 Jul 2024, 09:180.862 0.862 mg/l
18 Jun 2024, 10:390.733 0.733 mg/l
20 May 2024, 10:341.07 1.07 mg/l
15 Apr 2024, 12:541.43 1.43 mg/l
15 Mar 2024, 09:031.58 1.58 mg/l
19 Feb 2024, 11:062.28 2.28 mg/l
19 Jan 2024, 10:012.09 2.09 mg/l
29 Dec 2023, 11:332.48 2.48 mg/l
11 Dec 2023, 14:033.17 3.17 mg/l
28 Nov 2023, 13:033.36 3.36 mg/l
18 Oct 2023, 08:290.99 0.99 mg/l

Phosphate

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

0.17 mg/l

Sampled 14 Apr 2026, 6 months ago · 20 results banked

00.10.20.30.4mg/l20242025202618 Oct 2023, 08:29: 0.12 mg/l28 Nov 2023, 13:03: 0.12 mg/l11 Dec 2023, 14:03: 0.14 mg/l29 Dec 2023, 11:33: below 0.01 mg/l (not detected above this)19 Jan 2024, 10:01: 0.15 mg/l19 Feb 2024, 11:06: 0.14 mg/l15 Mar 2024, 09:03: 0.12 mg/l15 Apr 2024, 12:54: 0.2 mg/l20 May 2024, 10:34: 0.16 mg/l18 Jun 2024, 10:39: 0.14 mg/l19 Jul 2024, 09:18: 0.14 mg/l21 Aug 2024, 09:17: 0.31 mg/l30 Sep 2024, 11:50: 0.29 mg/l15 Oct 2024, 09:20: 0.22 mg/l21 Nov 2024, 10:16: 0.11 mg/l28 Jan 2025, 11:17: 0.072 mg/l4 Aug 2025, 12:53: 0.23 mg/l20 Oct 2025, 11:32: 0.37 mg/l5 Jan 2026, 13:16: 0.21 mg/l14 Apr 2026, 10:45: 0.17 mg/l
Every result (20)
SampledResult as publishedReads as
14 Apr 2026, 10:450.17 0.17 mg/l
5 Jan 2026, 13:160.21 0.21 mg/l
20 Oct 2025, 11:320.37 0.37 mg/l
4 Aug 2025, 12:530.23 0.23 mg/l
28 Jan 2025, 11:170.072 0.072 mg/l
21 Nov 2024, 10:160.11 0.11 mg/l
15 Oct 2024, 09:200.22 0.22 mg/l
30 Sep 2024, 11:500.29 0.29 mg/l
21 Aug 2024, 09:170.31 0.31 mg/l
19 Jul 2024, 09:180.14 0.14 mg/l
18 Jun 2024, 10:390.14 0.14 mg/l
20 May 2024, 10:340.16 0.16 mg/l
15 Apr 2024, 12:540.2 0.2 mg/l
15 Mar 2024, 09:030.12 0.12 mg/l
19 Feb 2024, 11:060.14 0.14 mg/l
19 Jan 2024, 10:010.15 0.15 mg/l
29 Dec 2023, 11:33<0.01 below 0.01 mg/l (not detected above this)
11 Dec 2023, 14:030.14 0.14 mg/l
28 Nov 2023, 13:030.12 0.12 mg/l
18 Oct 2023, 08:290.12 0.12 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

631 µS/cm

Sampled 14 Apr 2026, 6 months ago · 24 results banked

025050075010001250µS/cm20242025202618 Oct 2023, 08:29: 560 µS/cm28 Nov 2023, 13:03: 671 µS/cm11 Dec 2023, 14:03: 583 µS/cm29 Dec 2023, 11:33: 640 µS/cm19 Jan 2024, 10:01: 786 µS/cm19 Feb 2024, 11:06: 494 µS/cm15 Mar 2024, 09:03: 780 µS/cm3 Apr 2024, 11:25: 724 µS/cm15 Apr 2024, 12:54: 576 µS/cm15 Apr 2024, 12:55: 576 µS/cm20 May 2024, 10:34: 607 µS/cm18 Jun 2024, 10:39: 533 µS/cm19 Jul 2024, 09:18: 552 µS/cm21 Aug 2024, 09:17: 738 µS/cm30 Sep 2024, 11:50: 209 µS/cm15 Oct 2024, 09:20: 592 µS/cm21 Nov 2024, 10:16: 343 µS/cm6 Dec 2024, 11:42: 532 µS/cm28 Jan 2025, 11:17: 780 µS/cm13 Feb 2025, 11:25: 827 µS/cm4 Aug 2025, 12:53: 498 µS/cm20 Oct 2025, 11:32: 369 µS/cm5 Jan 2026, 13:16: 1111 µS/cm14 Apr 2026, 10:45: 631 µS/cm
Every result (24)
SampledResult as publishedReads as
14 Apr 2026, 10:45631 631 µS/cm
5 Jan 2026, 13:161111 1111 µS/cm
20 Oct 2025, 11:32369 369 µS/cm
4 Aug 2025, 12:53498 498 µS/cm
13 Feb 2025, 11:25827 827 µS/cm
28 Jan 2025, 11:17780 780 µS/cm
6 Dec 2024, 11:42532 532 µS/cm
21 Nov 2024, 10:16343 343 µS/cm
15 Oct 2024, 09:20592 592 µS/cm
30 Sep 2024, 11:50209 209 µS/cm
21 Aug 2024, 09:17738 738 µS/cm
19 Jul 2024, 09:18552 552 µS/cm
18 Jun 2024, 10:39533 533 µS/cm
20 May 2024, 10:34607 607 µS/cm
15 Apr 2024, 12:55576 576 µS/cm
15 Apr 2024, 12:54576 576 µS/cm
3 Apr 2024, 11:25724 724 µS/cm
15 Mar 2024, 09:03780 780 µS/cm
19 Feb 2024, 11:06494 494 µS/cm
19 Jan 2024, 10:01786 786 µS/cm
29 Dec 2023, 11:33640 640 µS/cm
11 Dec 2023, 14:03583 583 µS/cm
28 Nov 2023, 13:03671 671 µS/cm
18 Oct 2023, 08:29560 560 µS/cm

Everything measured here

15 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 15 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 24 Oct 2023 – Apr 2026 91.4% 14 Apr 2026
Oxygen, Dissolved as O2 9924 River water 24 Oct 2023 – Apr 2026 10.4 mg/l 14 Apr 2026
Temperature of Water 0076 River water 24 Oct 2023 – Apr 2026 9.6 °C 14 Apr 2026
pH 0061 River water 24 Oct 2023 – Apr 2026 7.94 14 Apr 2026
Ammoniacal Nitrogen as N 0111 River water 20 Oct 2023 – Apr 2026 0.11 mg/l 14 Apr 2026
Nitrate as N 0117 River water 20 Oct 2023 – Apr 2026 1.16 mg/l 14 Apr 2026
Orthophosphate, reactive as P 0180 River water 20 Oct 2023 – Apr 2026 0.17 mg/l 14 Apr 2026
Conductivity at 25 C 0077 River water 24 Oct 2023 – Apr 2026 631 µS/cm 14 Apr 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 20 Oct 2023 – Apr 2026 200 mg/l 14 Apr 2026
Ammonia un-ionised as N 0119 River water 20 Oct 2023 – Apr 2026 0.0017 mg/l 14 Apr 2026
BOD : 5 Day ATU 0085 River water 17 Dec 2023 – Apr 2026 3.1 mg/l 14 Apr 2026
Nitrite as N 0118 River water 20 Oct 2023 – Apr 2026 0.041 mg/l 14 Apr 2026
Nitrogen, Total as N 9686 River water 3 Oct 2023 – Feb 2024 3.1 mg/l 19 Feb 2024
Nitrogen, Total Oxidised as N 0116 River water 20 Oct 2023 – Apr 2026 1.2 mg/l 14 Apr 2026
Phosphorus, Total as P 0348 River water 3 Oct 2023 – Feb 2024 0.22 mg/l 19 Feb 2024

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.