River Medlock at Medlock Vale
EA name: RIVER MEDLOCK AT MEDLOCK VALE
Environment Agency sampling point NW-88002406 · 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
- 20 May 2026, 10:204 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
- 31 since 16 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 390328, 399673As published, to the nearest 1 m. Open in a map
- River, by its own name
- Medlock
- River, by the map
- River MedlockPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Why it was sampled
- Monitoring (national agency policy) (19 samples)
Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.2%
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 100.2 | 100.2% |
| 4 Feb 2026, 10:31 | 99.1 | 99.1% |
| 9 Jan 2026, 10:26 | 101.4 | 101.4% |
| 15 Dec 2025, 10:48 | 100 | 100% |
| 13 Nov 2025, 10:41 | 99.9 | 99.9% |
| 2 Oct 2025, 12:00 | 99.6 | 99.6% |
| 10 Sep 2025, 12:43 | 96.7 | 96.7% |
| 18 Aug 2025, 13:41 | 94.1 | 94.1% |
| 10 Jul 2025, 12:02 | 99.6 | 99.6% |
| 5 Jun 2025, 09:49 | 94 | 94% |
| 19 May 2025, 10:52 | 98.6 | 98.6% |
| 8 Apr 2025, 15:07 | 113.9 | 113.9% |
| 25 Mar 2025, 11:37 | 104.7 | 104.7% |
| 30 Jan 2025, 13:10 | 99.3 | 99.3% |
| 9 Dec 2024, 14:34 | 99 | 99% |
| 25 Nov 2024, 11:28 | 99.6 | 99.6% |
| 30 Oct 2024, 10:07 | 97.8 | 97.8% |
| 24 Sep 2024, 10:00 | 97.5 | 97.5% |
| 22 Aug 2024, 09:25 | 96 | 96% |
| 17 Jul 2024, 08:59 | 102.3 | 102.3% |
| 17 Jun 2024, 13:00 | 103 | 103% |
| 14 May 2024, 11:05 | 99.1 | 99.1% |
| 17 Apr 2024, 10:59 | 103.4 | 103.4% |
| 27 Mar 2024, 10:05 | 101.3 | 101.3% |
| 27 Feb 2024, 11:03 | 99.1 | 99.1% |
| 26 Jan 2024, 09:46 | 98.6 | 98.6% |
| 5 Dec 2023, 13:10 | 98.3 | 98.3% |
| 21 Nov 2023, 10:15 | 99.2 | 99.2% |
| 16 Oct 2023, 10:35 | 100 | 100% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.6 mg/l
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 11.6 | 11.6 mg/l |
| 4 Feb 2026, 10:31 | 12.7 | 12.7 mg/l |
| 9 Jan 2026, 10:26 | 13.4 | 13.4 mg/l |
| 15 Dec 2025, 10:48 | 11.5 | 11.5 mg/l |
| 13 Nov 2025, 10:41 | 11 | 11 mg/l |
| 2 Oct 2025, 12:00 | 10.5 | 10.5 mg/l |
| 10 Sep 2025, 12:43 | 9.94 | 9.94 mg/l |
| 18 Aug 2025, 13:41 | 9.3 | 9.3 mg/l |
| 10 Jul 2025, 12:02 | 9.66 | 9.66 mg/l |
| 5 Jun 2025, 09:49 | 9.99 | 9.99 mg/l |
| 19 May 2025, 10:52 | 10.7 | 10.7 mg/l |
| 8 Apr 2025, 15:07 | 12.7 | 12.7 mg/l |
| 25 Mar 2025, 11:37 | 12.2 | 12.2 mg/l |
| 30 Jan 2025, 13:10 | 13.1 | 13.1 mg/l |
| 9 Dec 2024, 14:34 | 12 | 12 mg/l |
| 25 Nov 2024, 11:28 | 11.8 | 11.8 mg/l |
| 30 Oct 2024, 10:07 | 10.7 | 10.7 mg/l |
| 24 Sep 2024, 10:00 | 10.3 | 10.3 mg/l |
| 22 Aug 2024, 09:25 | 9.85 | 9.85 mg/l |
| 17 Jul 2024, 08:59 | 10.5 | 10.5 mg/l |
| 17 Jun 2024, 13:00 | 10.7 | 10.7 mg/l |
| 14 May 2024, 11:05 | 10.1 | 10.1 mg/l |
| 17 Apr 2024, 10:59 | 12.2 | 12.2 mg/l |
| 27 Mar 2024, 10:05 | 12 | 12 mg/l |
| 27 Feb 2024, 11:03 | 12.6 | 12.6 mg/l |
| 26 Jan 2024, 09:46 | 12.1 | 12.1 mg/l |
| 5 Dec 2023, 13:10 | 12.3 | 12.3 mg/l |
| 21 Nov 2023, 10:15 | 11.4 | 11.4 mg/l |
| 16 Oct 2023, 10:35 | 11.9 | 11.9 mg/l |
Water temperature
code 0076 · °C
8.9 °C
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 8.9 | 8.9 °C |
| 4 Feb 2026, 10:31 | 4.9 | 4.9 °C |
| 9 Jan 2026, 10:26 | 3.6 | 3.6 °C |
| 15 Dec 2025, 10:48 | 9.1 | 9.1 °C |
| 13 Nov 2025, 10:41 | 11.1 | 11.1 °C |
| 2 Oct 2025, 12:00 | 12.7 | 12.7 °C |
| 10 Sep 2025, 12:43 | 14 | 14 °C |
| 18 Aug 2025, 13:41 | 15.8 | 15.8 °C |
| 10 Jul 2025, 12:02 | 16.7 | 16.7 °C |
| 5 Jun 2025, 09:49 | 12.5 | 12.5 °C |
| 19 May 2025, 10:52 | 11.5 | 11.5 °C |
| 8 Apr 2025, 15:07 | 10.5 | 10.5 °C |
| 25 Mar 2025, 11:37 | 8.5 | 8.5 °C |
| 30 Jan 2025, 13:10 | 3.8 | 3.8 °C |
| 9 Dec 2024, 14:34 | 7.1 | 7.1 °C |
| 25 Nov 2024, 11:28 | 8 | 8 °C |
| 30 Oct 2024, 10:07 | 11.2 | 11.2 °C |
| 24 Sep 2024, 10:00 | 12.7 | 12.7 °C |
| 22 Aug 2024, 09:25 | 14.1 | 14.1 °C |
| 17 Jul 2024, 08:59 | 14 | 14 °C |
| 17 Jun 2024, 13:00 | 13.4 | 13.4 °C |
| 14 May 2024, 11:05 | 14.3 | 14.3 °C |
| 17 Apr 2024, 10:59 | 8 | 8 °C |
| 27 Mar 2024, 10:05 | 7.8 | 7.8 °C |
| 27 Feb 2024, 11:03 | 5 | 5 °C |
| 26 Jan 2024, 09:46 | 6.6 | 6.6 °C |
| 5 Dec 2023, 13:10 | 5.6 | 5.6 °C |
| 21 Nov 2023, 10:15 | 9.1 | 9.1 °C |
| 16 Oct 2023, 10:35 | 7.8 | 7.8 °C |
pH
code 0061
8.15
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 8.15 | 8.15 |
| 4 Feb 2026, 10:31 | 8.11 | 8.11 |
| 9 Jan 2026, 10:26 | 8.17 | 8.17 |
| 15 Dec 2025, 10:48 | 7.85 | 7.85 |
| 13 Nov 2025, 10:41 | 7.97 | 7.97 |
| 2 Oct 2025, 12:00 | 8.04 | 8.04 |
| 10 Sep 2025, 12:43 | 8.18 | 8.18 |
| 18 Aug 2025, 13:41 | 8.25 | 8.25 |
| 10 Jul 2025, 12:02 | 8.1 | 8.1 |
| 5 Jun 2025, 09:49 | 7.78 | 7.78 |
| 19 May 2025, 10:52 | 8.11 | 8.11 |
| 8 Apr 2025, 15:07 | 8.56 | 8.56 |
| 25 Mar 2025, 11:37 | 8.35 | 8.35 |
| 30 Jan 2025, 13:10 | 8.1 | 8.1 |
| 9 Dec 2024, 14:34 | 8.09 | 8.09 |
| 25 Nov 2024, 11:28 | 7.91 | 7.91 |
| 30 Oct 2024, 10:07 | 8.06 | 8.06 |
| 24 Sep 2024, 10:00 | 8.03 | 8.03 |
| 22 Aug 2024, 09:25 | 8.19 | 8.19 |
| 17 Jul 2024, 08:59 | 8.09 | 8.09 |
| 17 Jun 2024, 13:00 | 8.25 | 8.25 |
| 14 May 2024, 11:05 | 8.23 | 8.23 |
| 17 Apr 2024, 10:59 | 8.34 | 8.34 |
| 27 Mar 2024, 10:05 | 8.36 | 8.36 |
| 27 Feb 2024, 11:03 | 8.13 | 8.13 |
| 26 Jan 2024, 09:46 | 8.09 | 8.09 |
| 5 Dec 2023, 13:10 | 7.74 | 7.74 |
| 21 Nov 2023, 10:15 | 7.88 | 7.88 |
| 16 Oct 2023, 10:35 | 7.99 | 7.99 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.083 mg/l
Sampled 9 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 0.083 | 0.083 mg/l |
| 4 Feb 2026, 10:31 | 0.32 | 0.32 mg/l |
| 9 Jan 2026, 10:26 | 0.4 | 0.4 mg/l |
| 15 Dec 2025, 10:48 | 0.62 | 0.62 mg/l |
| 13 Nov 2025, 10:41 | 0.053 | 0.053 mg/l |
| 2 Oct 2025, 12:00 | 0.044 | 0.044 mg/l |
| 10 Sep 2025, 12:43 | 0.057 | 0.057 mg/l |
| 18 Aug 2025, 13:41 | 0.077 | 0.077 mg/l |
| 10 Jul 2025, 12:02 | 0.068 | 0.068 mg/l |
| 5 Jun 2025, 09:49 | 0.88 | 0.88 mg/l |
| 19 May 2025, 10:52 | 0.099 | 0.099 mg/l |
| 8 Apr 2025, 15:07 | 0.23 | 0.23 mg/l |
| 25 Mar 2025, 11:37 | 0.056 | 0.056 mg/l |
| 30 Jan 2025, 13:10 | 0.61 | 0.61 mg/l |
| 9 Dec 2024, 14:34 | 0.2 | 0.2 mg/l |
| 25 Nov 2024, 11:28 | 0.064 | 0.064 mg/l |
| 30 Oct 2024, 10:07 | 0.049 | 0.049 mg/l |
| 24 Sep 2024, 10:00 | 0.075 | 0.075 mg/l |
| 22 Aug 2024, 09:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 08:59 | 0.099 | 0.099 mg/l |
| 17 Jun 2024, 13:00 | 0.035 | 0.035 mg/l |
| 14 May 2024, 11:05 | 0.064 | 0.064 mg/l |
| 17 Apr 2024, 10:59 | 0.27 | 0.27 mg/l |
| 27 Mar 2024, 10:05 | 0.044 | 0.044 mg/l |
| 27 Feb 2024, 11:03 | 0.43 | 0.43 mg/l |
| 5 Dec 2023, 13:10 | 0.14 | 0.14 mg/l |
| 21 Nov 2023, 10:15 | 0.073 | 0.073 mg/l |
| 16 Oct 2023, 10:35 | 0.048 | 0.048 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.16 mg/l
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 2.16 | 2.16 mg/l |
| 4 Feb 2026, 10:31 | 1.97 | 1.97 mg/l |
| 9 Jan 2026, 10:26 | 1.39 | 1.39 mg/l |
| 15 Dec 2025, 10:48 | 1.08 | 1.08 mg/l |
| 13 Nov 2025, 10:41 | 1.18 | 1.18 mg/l |
| 2 Oct 2025, 12:00 | 1.27 | 1.27 mg/l |
| 10 Sep 2025, 12:43 | 1.09 | 1.09 mg/l |
| 18 Aug 2025, 13:41 | 1.08 | 1.08 mg/l |
| 10 Jul 2025, 12:02 | 1.28 | 1.28 mg/l |
| 5 Jun 2025, 09:49 | 0.922 | 0.922 mg/l |
| 19 May 2025, 10:52 | 1.77 | 1.77 mg/l |
| 8 Apr 2025, 15:07 | 1.88 | 1.88 mg/l |
| 25 Mar 2025, 11:37 | 1.78 | 1.78 mg/l |
| 30 Jan 2025, 13:10 | 1.47 | 1.47 mg/l |
| 9 Dec 2024, 14:34 | 1.37 | 1.37 mg/l |
| 25 Nov 2024, 11:28 | 1.79 | 1.79 mg/l |
| 30 Oct 2024, 10:07 | 1.08 | 1.08 mg/l |
| 24 Sep 2024, 10:00 | 1.28 | 1.28 mg/l |
| 22 Aug 2024, 09:25 | 0.973 | 0.973 mg/l |
| 17 Jul 2024, 08:59 | 1.15 | 1.15 mg/l |
| 17 Jun 2024, 13:00 | 0.941 | 0.941 mg/l |
| 14 May 2024, 11:05 | 1.18 | 1.18 mg/l |
| 17 Apr 2024, 10:59 | 1.16 | 1.16 mg/l |
| 27 Mar 2024, 10:05 | 0.897 | 0.897 mg/l |
| 27 Feb 2024, 11:03 | 1.67 | 1.67 mg/l |
| 26 Jan 2024, 09:46 | 1.27 | 1.27 mg/l |
| 5 Dec 2023, 13:10 | 0.982 | 0.982 mg/l |
| 21 Nov 2023, 10:15 | 1.18 | 1.18 mg/l |
| 16 Oct 2023, 10:35 | 1.18 | 1.18 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.036 mg/l
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 0.036 | 0.036 mg/l |
| 4 Feb 2026, 10:31 | 0.043 | 0.043 mg/l |
| 9 Jan 2026, 10:26 | 0.062 | 0.062 mg/l |
| 15 Dec 2025, 10:48 | 0.21 | 0.21 mg/l |
| 13 Nov 2025, 10:41 | 0.078 | 0.078 mg/l |
| 2 Oct 2025, 12:00 | 0.057 | 0.057 mg/l |
| 10 Sep 2025, 12:43 | 0.05 | 0.05 mg/l |
| 18 Aug 2025, 13:41 | 0.047 | 0.047 mg/l |
| 10 Jul 2025, 12:02 | 0.044 | 0.044 mg/l |
| 5 Jun 2025, 09:49 | 0.068 | 0.068 mg/l |
| 19 May 2025, 10:52 | 0.035 | 0.035 mg/l |
| 8 Apr 2025, 15:07 | 0.013 | 0.013 mg/l |
| 25 Mar 2025, 11:37 | 0.022 | 0.022 mg/l |
| 30 Jan 2025, 13:10 | 0.04 | 0.04 mg/l |
| 9 Dec 2024, 14:34 | 0.065 | 0.065 mg/l |
| 25 Nov 2024, 11:28 | 0.09 | 0.09 mg/l |
| 30 Oct 2024, 10:07 | 0.071 | 0.071 mg/l |
| 24 Sep 2024, 10:00 | 0.06 | 0.06 mg/l |
| 22 Aug 2024, 09:25 | 0.044 | 0.044 mg/l |
| 17 Jul 2024, 08:59 | 0.079 | 0.079 mg/l |
| 17 Jun 2024, 13:00 | 0.073 | 0.073 mg/l |
| 14 May 2024, 11:05 | 0.04 | 0.04 mg/l |
| 17 Apr 2024, 10:59 | 0.043 | 0.043 mg/l |
| 27 Mar 2024, 10:05 | 0.08 | 0.08 mg/l |
| 27 Feb 2024, 11:03 | 0.041 | 0.041 mg/l |
| 26 Jan 2024, 09:46 | 0.03 | 0.03 mg/l |
| 5 Dec 2023, 13:10 | 0.046 | 0.046 mg/l |
| 21 Nov 2023, 10:15 | 0.064 | 0.064 mg/l |
| 16 Oct 2023, 10:35 | 0.056 | 0.056 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
527 µS/cm
Sampled 9 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Mar 2026, 10:37 | 527 | 527 µS/cm |
| 4 Feb 2026, 10:31 | 557 | 557 µS/cm |
| 9 Jan 2026, 10:26 | 688 | 688 µS/cm |
| 15 Dec 2025, 10:48 | 240 | 240 µS/cm |
| 13 Nov 2025, 10:41 | 345 | 345 µS/cm |
| 2 Oct 2025, 12:00 | 509 | 509 µS/cm |
| 10 Sep 2025, 12:43 | 657 | 657 µS/cm |
| 18 Aug 2025, 13:41 | 738 | 738 µS/cm |
| 10 Jul 2025, 12:02 | 690 | 690 µS/cm |
| 5 Jun 2025, 09:49 | 267 | 267 µS/cm |
| 19 May 2025, 10:52 | 729 | 729 µS/cm |
| 8 Apr 2025, 15:07 | 646 | 646 µS/cm |
| 25 Mar 2025, 11:37 | 603 | 603 µS/cm |
| 30 Jan 2025, 13:10 | 502 | 502 µS/cm |
| 9 Dec 2024, 14:34 | 412 | 412 µS/cm |
| 25 Nov 2024, 11:28 | 363 | 363 µS/cm |
| 30 Oct 2024, 10:07 | 427 | 427 µS/cm |
| 24 Sep 2024, 10:00 | 498 | 498 µS/cm |
| 22 Aug 2024, 09:25 | 637 | 637 µS/cm |
| 17 Jul 2024, 08:59 | 424 | 424 µS/cm |
| 17 Jun 2024, 13:00 | 441 | 441 µS/cm |
| 14 May 2024, 11:05 | 570 | 570 µS/cm |
| 17 Apr 2024, 10:59 | 416 | 416 µS/cm |
| 27 Mar 2024, 10:05 | 483 | 483 µS/cm |
| 27 Feb 2024, 11:03 | 454 | 454 µS/cm |
| 26 Jan 2024, 09:46 | 403 | 403 µS/cm |
| 5 Dec 2023, 13:10 | 356 | 356 µS/cm |
| 21 Nov 2023, 10:15 | 351 | 351 µS/cm |
| 16 Oct 2023, 10:35 | 417 | 417 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
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Oct 2023 – Mar 2026 | 100.2% 9 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Mar 2026 | 11.6 mg/l 9 Mar 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Mar 2026 | 8.9 °C 9 Mar 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Mar 2026 | 8.15 9 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Oct 2023 – Mar 2026 | 0.083 mg/l 9 Mar 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Mar 2026 | 2.16 mg/l 9 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Mar 2026 | 0.036 mg/l 9 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Mar 2026 | 527 µS/cm 9 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Mar 2026 | 160 mg/l 9 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 28 | Oct 2023 – Mar 2026 | 0.0014 mg/l 9 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Feb 2024 – May 2026 | 2.4 mg/l 20 May 2026 |
| Chloride 0172 | River water | 12 | Apr 2025 – Mar 2026 | 31 mg/l 9 Mar 2026 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Mar 2026 | 0.036 mg/l 9 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Mar 2026 | 2.2 mg/l 9 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 12 | Apr 2025 – Mar 2026 | 6.3 mg/l 9 Mar 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.