Main Drain at B5259
EA name: MAIN DRAIN @ B5259
Environment Agency sampling point NW-88009772 · 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
- 15 Dec 2025, 12:1510 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
- 29 since 3 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 337800, 428800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Main Drain
- River, by the map
- Main DrainPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Monitoring (national agency policy) (21 samples)
Planned investigation (local monitoring) (8 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
70.2%
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 70.2 | 70.2% |
| 4 Dec 2025, 09:57 | 73.2 | 73.2% |
| 24 Nov 2025, 08:44 | 73.5 | 73.5% |
| 3 Nov 2025, 10:58 | 64.3 | 64.3% |
| 12 Mar 2025, 12:02 | 77.6 | 77.6% |
| 18 Feb 2025, 11:11 | 73.2 | 73.2% |
| 29 Jan 2025, 11:30 | 63.6 | 63.6% |
| 9 Dec 2024, 11:18 | 62.5 | 62.5% |
| 19 Nov 2024, 12:19 | 53.6 | 53.6% |
| 15 Oct 2024, 11:11 | 47.2 | 47.2% |
| 19 Sep 2024, 12:00 | 30.9 | 30.9% |
| 23 Aug 2024, 10:22 | 23.5 | 23.5% |
| 22 Jul 2024, 10:39 | 41 | 41% |
| 26 Jun 2024, 13:18 | 27 | 27% |
| 20 May 2024, 10:19 | 54.8 | 54.8% |
| 15 Apr 2024, 09:20 | 69.2 | 69.2% |
| 18 Mar 2024, 09:37 | 67.4 | 67.4% |
| 22 Feb 2024, 10:07 | 75 | 75% |
| 30 Jan 2024, 12:57 | 66 | 66% |
| 21 Nov 2023, 11:03 | 61.8 | 61.8% |
| 16 Oct 2023, 09:28 | 51.9 | 51.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.06 mg/l
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 8.06 | 8.06 mg/l |
| 4 Dec 2025, 09:57 | 8.79 | 8.79 mg/l |
| 24 Nov 2025, 08:44 | 8.8 | 8.8 mg/l |
| 3 Nov 2025, 10:58 | 6.99 | 6.99 mg/l |
| 12 Mar 2025, 12:02 | 9.5 | 9.5 mg/l |
| 18 Feb 2025, 11:11 | 9.79 | 9.79 mg/l |
| 29 Jan 2025, 11:30 | 7.93 | 7.93 mg/l |
| 9 Dec 2024, 11:18 | 7.58 | 7.58 mg/l |
| 19 Nov 2024, 12:19 | 6.45 | 6.45 mg/l |
| 15 Oct 2024, 11:11 | 5.23 | 5.23 mg/l |
| 19 Sep 2024, 12:00 | 3.16 | 3.16 mg/l |
| 23 Aug 2024, 10:22 | 2.38 | 2.38 mg/l |
| 22 Jul 2024, 10:39 | 3.95 | 3.95 mg/l |
| 26 Jun 2024, 13:18 | 2.4 | 2.4 mg/l |
| 20 May 2024, 10:19 | 5.25 | 5.25 mg/l |
| 15 Apr 2024, 09:20 | 7.99 | 7.99 mg/l |
| 18 Mar 2024, 09:37 | 7.85 | 7.85 mg/l |
| 22 Feb 2024, 10:07 | 8.91 | 8.91 mg/l |
| 30 Jan 2024, 12:57 | 7.96 | 7.96 mg/l |
| 21 Nov 2023, 11:03 | 7.03 | 7.03 mg/l |
| 16 Oct 2023, 09:28 | 5.96 | 5.96 mg/l |
Water temperature
code 0076 · °C
9.2 °C
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 9.2 | 9.2 °C |
| 4 Dec 2025, 09:57 | 7.4 | 7.4 °C |
| 24 Nov 2025, 08:44 | 7.5 | 7.5 °C |
| 3 Nov 2025, 10:58 | 11.5 | 11.5 °C |
| 12 Mar 2025, 12:02 | 6.6 | 6.6 °C |
| 18 Feb 2025, 11:11 | 3.2 | 3.2 °C |
| 29 Jan 2025, 11:30 | 5.9 | 5.9 °C |
| 9 Dec 2024, 11:18 | 7 | 7 °C |
| 19 Nov 2024, 12:19 | 7.3 | 7.3 °C |
| 15 Oct 2024, 11:11 | 10.7 | 10.7 °C |
| 19 Sep 2024, 12:00 | 14.2 | 14.2 °C |
| 23 Aug 2024, 10:22 | 14.7 | 14.7 °C |
| 22 Jul 2024, 10:39 | 17 | 17 °C |
| 26 Jun 2024, 13:18 | 21 | 21 °C |
| 20 May 2024, 10:19 | 17.3 | 17.3 °C |
| 15 Apr 2024, 09:20 | 9 | 9 °C |
| 18 Mar 2024, 09:37 | 8.6 | 8.6 °C |
| 22 Feb 2024, 10:07 | 7.8 | 7.8 °C |
| 30 Jan 2024, 12:57 | 7.2 | 7.2 °C |
| 21 Nov 2023, 11:03 | 9.6 | 9.6 °C |
| 16 Oct 2023, 09:28 | 9.2 | 9.2 °C |
pH
code 0061
7.12
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 7.12 | 7.12 |
| 4 Dec 2025, 09:57 | 7.26 | 7.26 |
| 24 Nov 2025, 08:44 | 6.99 | 6.99 |
| 3 Nov 2025, 10:58 | 6.95 | 6.95 |
| 12 Mar 2025, 12:02 | 7.56 | 7.56 |
| 18 Feb 2025, 11:11 | 7.37 | 7.37 |
| 29 Jan 2025, 11:30 | 7 | 7 |
| 9 Dec 2024, 11:18 | 6.91 | 6.91 |
| 19 Nov 2024, 12:19 | 7.02 | 7.02 |
| 15 Oct 2024, 11:11 | 7.01 | 7.01 |
| 19 Sep 2024, 12:00 | 7.25 | 7.25 |
| 23 Aug 2024, 10:22 | 7.33 | 7.33 |
| 22 Jul 2024, 10:39 | 7.32 | 7.32 |
| 26 Jun 2024, 13:18 | 7.43 | 7.43 |
| 20 May 2024, 10:19 | 7.34 | 7.34 |
| 15 Apr 2024, 09:20 | 7.12 | 7.12 |
| 18 Mar 2024, 09:37 | 6.99 | 6.99 |
| 22 Feb 2024, 10:07 | 7.15 | 7.15 |
| 30 Jan 2024, 12:57 | 6.95 | 6.95 |
| 21 Nov 2023, 11:03 | 6.89 | 6.89 |
| 16 Oct 2023, 09:28 | 6.93 | 6.93 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.34 mg/l
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 0.34 | 0.34 mg/l |
| 4 Dec 2025, 09:57 | 0.27 | 0.27 mg/l |
| 24 Nov 2025, 08:44 | 0.28 | 0.28 mg/l |
| 3 Nov 2025, 10:58 | 0.29 | 0.29 mg/l |
| 12 Mar 2025, 12:02 | 1.4 | 1.4 mg/l |
| 18 Feb 2025, 11:11 | 1.7 | 1.7 mg/l |
| 29 Jan 2025, 11:30 | 0.41 | 0.41 mg/l |
| 9 Dec 2024, 11:18 | 0.33 | 0.33 mg/l |
| 19 Nov 2024, 12:19 | 0.5 | 0.5 mg/l |
| 15 Oct 2024, 11:11 | 0.28 | 0.28 mg/l |
| 19 Sep 2024, 12:00 | 0.074 | 0.074 mg/l |
| 23 Aug 2024, 10:22 | 0.28 | 0.28 mg/l |
| 22 Jul 2024, 10:39 | 0.15 | 0.15 mg/l |
| 26 Jun 2024, 13:18 | 0.051 | 0.051 mg/l |
| 20 May 2024, 10:19 | 0.63 | 0.63 mg/l |
| 15 Apr 2024, 09:20 | 1.1 | 1.1 mg/l |
| 18 Mar 2024, 09:37 | 0.64 | 0.64 mg/l |
| 22 Feb 2024, 10:07 | 0.35 | 0.35 mg/l |
| 30 Jan 2024, 12:57 | 0.43 | 0.43 mg/l |
| 21 Nov 2023, 11:03 | 0.34 | 0.34 mg/l |
| 16 Oct 2023, 09:28 | 0.4 | 0.4 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.07 mg/l
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 3.07 | 3.07 mg/l |
| 4 Dec 2025, 09:57 | 4.76 | 4.76 mg/l |
| 24 Nov 2025, 08:44 | 5.26 | 5.26 mg/l |
| 3 Nov 2025, 10:58 | 6.23 | 6.23 mg/l |
| 12 Mar 2025, 12:02 | 1.56 | 1.56 mg/l |
| 18 Feb 2025, 11:11 | 1.58 | 1.58 mg/l |
| 29 Jan 2025, 11:30 | 2.18 | 2.18 mg/l |
| 9 Dec 2024, 11:18 | 1.78 | 1.78 mg/l |
| 19 Nov 2024, 12:19 | 2.26 | 2.26 mg/l |
| 15 Oct 2024, 11:11 | 1.45 | 1.45 mg/l |
| 19 Sep 2024, 12:00 | 1.78 | 1.78 mg/l |
| 23 Aug 2024, 10:22 | 1.35 | 1.35 mg/l |
| 22 Jul 2024, 10:39 | 1.99 | 1.99 mg/l |
| 26 Jun 2024, 13:18 | 2.23 | 2.23 mg/l |
| 20 May 2024, 10:19 | 1.7 | 1.7 mg/l |
| 15 Apr 2024, 09:20 | 0.967 | 0.967 mg/l |
| 18 Mar 2024, 09:37 | 0.962 | 0.962 mg/l |
| 22 Feb 2024, 10:07 | 0.906 | 0.906 mg/l |
| 30 Jan 2024, 12:57 | 1.48 | 1.48 mg/l |
| 21 Nov 2023, 11:03 | 1.18 | 1.18 mg/l |
| 16 Oct 2023, 09:28 | 1.26 | 1.26 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.2 mg/l
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 0.2 | 0.2 mg/l |
| 4 Dec 2025, 09:57 | 0.11 | 0.11 mg/l |
| 24 Nov 2025, 08:44 | 0.13 | 0.13 mg/l |
| 3 Nov 2025, 10:58 | 0.13 | 0.13 mg/l |
| 12 Mar 2025, 12:02 | 0.16 | 0.16 mg/l |
| 18 Feb 2025, 11:11 | 0.14 | 0.14 mg/l |
| 29 Jan 2025, 11:30 | 0.1 | 0.1 mg/l |
| 9 Dec 2024, 11:18 | 0.12 | 0.12 mg/l |
| 19 Nov 2024, 12:19 | 0.094 | 0.094 mg/l |
| 15 Oct 2024, 11:11 | 0.13 | 0.13 mg/l |
| 19 Sep 2024, 12:00 | 0.11 | 0.11 mg/l |
| 23 Aug 2024, 10:22 | 0.2 | 0.2 mg/l |
| 22 Jul 2024, 10:39 | 0.19 | 0.19 mg/l |
| 26 Jun 2024, 13:18 | 0.095 | 0.095 mg/l |
| 20 May 2024, 10:19 | 0.21 | 0.21 mg/l |
| 15 Apr 2024, 09:20 | 0.16 | 0.16 mg/l |
| 18 Mar 2024, 09:37 | 0.073 | 0.073 mg/l |
| 22 Feb 2024, 10:07 | 0.087 | 0.087 mg/l |
| 30 Jan 2024, 12:57 | 0.087 | 0.087 mg/l |
| 21 Nov 2023, 11:03 | 0.16 | 0.16 mg/l |
| 16 Oct 2023, 09:28 | 0.096 | 0.096 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
453 µS/cm
Sampled 15 Dec 2025, 10 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:15 | 453 | 453 µS/cm |
| 4 Dec 2025, 09:57 | 670 | 670 µS/cm |
| 24 Nov 2025, 08:44 | 654 | 654 µS/cm |
| 3 Nov 2025, 10:58 | 701 | 701 µS/cm |
| 12 Mar 2025, 12:02 | 876 | 876 µS/cm |
| 18 Feb 2025, 11:11 | 846 | 846 µS/cm |
| 29 Jan 2025, 11:30 | 604 | 604 µS/cm |
| 9 Dec 2024, 11:18 | 541 | 541 µS/cm |
| 19 Nov 2024, 12:19 | 829 | 829 µS/cm |
| 15 Oct 2024, 11:11 | 760 | 760 µS/cm |
| 19 Sep 2024, 12:00 | 712 | 712 µS/cm |
| 23 Aug 2024, 10:22 | 633 | 633 µS/cm |
| 22 Jul 2024, 10:39 | 581 | 581 µS/cm |
| 26 Jun 2024, 13:18 | 754 | 754 µS/cm |
| 20 May 2024, 10:19 | 757 | 757 µS/cm |
| 15 Apr 2024, 09:20 | 662 | 662 µS/cm |
| 18 Mar 2024, 09:37 | 543 | 543 µS/cm |
| 22 Feb 2024, 10:07 | 353 | 353 µS/cm |
| 30 Jan 2024, 12:57 | 474 | 474 µS/cm |
| 21 Nov 2023, 11:03 | 544 | 544 µS/cm |
| 16 Oct 2023, 09:28 | 671 | 671 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
6900 per 100 ml
Sampled 12 Mar 2025, 19 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Mar 2025, 12:02 | 6900 | 6900 per 100 ml |
| 18 Feb 2025, 11:11 | 8500 | 8500 per 100 ml |
| 29 Jan 2025, 11:30 | 730 | 730 per 100 ml |
| 9 Dec 2024, 11:18 | 1500 | 1500 per 100 ml |
| 19 Nov 2024, 12:19 | 4100 | 4100 per 100 ml |
| 15 Oct 2024, 11:11 | 1100 | 1100 per 100 ml |
| 19 Sep 2024, 12:00 | 200 | 200 per 100 ml |
| 23 Aug 2024, 10:22 | 420 | 420 per 100 ml |
| 22 Jul 2024, 10:39 | 2900 | 2900 per 100 ml |
| 26 Jun 2024, 13:18 | 6300 | 6300 per 100 ml |
| 20 May 2024, 10:20 | 400 | 400 per 100 ml |
| 23 Apr 2024, 10:47 | 3400 | 3400 per 100 ml |
| 18 Mar 2024, 09:37 | 990 | 990 per 100 ml |
| 11 Mar 2024, 11:36 | 2400 | 2400 per 100 ml |
| 22 Feb 2024, 10:07 | 4500 | 4500 per 100 ml |
| 5 Feb 2024, 11:17 | 1400 | 1400 per 100 ml |
| 30 Jan 2024, 12:57 | 1700 | 1700 per 100 ml |
| 8 Jan 2024, 12:10 | 2300 | 2300 per 100 ml |
| 4 Dec 2023, 10:59 | 2400 | 2400 per 100 ml |
| 21 Nov 2023, 11:03 | 470 | 470 per 100 ml |
| 1 Nov 2023, 14:07 | 4400 | 4400 per 100 ml |
| 16 Oct 2023, 09:28 | 470 | 470 per 100 ml |
| 3 Oct 2023, 10:53 | 15000 | 15000 per 100 ml |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 21 | Oct 2023 – Dec 2025 | 70.2% 15 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – Dec 2025 | 8.06 mg/l 15 Dec 2025 |
| Temperature of Water 0076 | River water | 21 | Oct 2023 – Dec 2025 | 9.2 °C 15 Dec 2025 |
| pH 0061 | River water | 21 | Oct 2023 – Dec 2025 | 7.12 15 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Oct 2023 – Dec 2025 | 0.34 mg/l 15 Dec 2025 |
| Nitrate as N 0117 | River water | 21 | Oct 2023 – Dec 2025 | 3.07 mg/l 15 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Dec 2025 | 0.2 mg/l 15 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – Dec 2025 | 453 µS/cm 15 Dec 2025 |
| Escherichia coli : Confirmed : MF 2348 | River water | 23 | Oct 2023 – Mar 2025 | 6900 per 100 ml 12 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Dec 2025 | 140 mg/l 15 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 21 | Oct 2023 – Dec 2025 | 0.00078 mg/l 15 Dec 2025 |
| BOD : 5 Day ATU 0085 | River water | 17 | Feb 2024 – Dec 2025 | 1 mg/l 4 Dec 2025 |
| Enterococci: Intestinal: Confirmed: MF 3723 | River water | 23 | Oct 2023 – Mar 2025 | 4000 colony forming units / 100ml 12 Mar 2025 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 23 | Oct 2023 – Mar 2025 | 4000 colony forming units / 100ml 12 Mar 2025 |
| MST Filtration 4926 | River water | 23 | Oct 2023 – Mar 2025 | DNA Stored 12 Mar 2025 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – Dec 2025 | 0.026 mg/l 15 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – Dec 2025 | 3.1 mg/l 15 Dec 2025 |
| Volume of Sample Filtered 4865 | River water | 23 | Oct 2023 – Mar 2025 | 510 millilitre 12 Mar 2025 |
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.