Darley Brook at Darley Hall
EA name: DARLEY BROOK AT DARLEY HALL
Environment Agency sampling point NW-88000720 · 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 Mar 2026, 10:477 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
- 12 since 3 Apr 2025 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 359894, 364349As published, to the nearest 1 m. Open in a map
- River, by its own name
- Darley Brook
- River, by the map
- Darley BrookPlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- Ashbrook On the River Weaver · 10 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.7%
Sampled 4 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 99.7 | 99.7% |
| 12 Feb 2026, 10:01 | 98.4 | 98.4% |
| 7 Jan 2026, 10:26 | 98.7 | 98.7% |
| 2 Dec 2025, 10:15 | 96 | 96% |
| 5 Nov 2025, 13:13 | 85.5 | 85.5% |
| 23 Oct 2025, 12:25 | 86.3 | 86.3% |
| 23 Sep 2025, 10:20 | 86.8 | 86.8% |
| 14 Aug 2025, 10:20 | 19.2 | 19.2% |
| 3 Jul 2025, 09:45 | 63 | 63% |
| 2 Jun 2025, 09:36 | 84.7 | 84.7% |
| 8 May 2025, 09:24 | 95.4 | 95.4% |
| 3 Apr 2025, 10:30 | 98.5 | 98.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.6 mg/l
Sampled 4 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 11.6 | 11.6 mg/l |
| 12 Feb 2026, 10:01 | 12 | 12 mg/l |
| 7 Jan 2026, 10:26 | 13.4 | 13.4 mg/l |
| 2 Dec 2025, 10:15 | 12 | 12 mg/l |
| 5 Nov 2025, 13:13 | 8.94 | 8.94 mg/l |
| 23 Oct 2025, 12:25 | 9.38 | 9.38 mg/l |
| 23 Sep 2025, 10:20 | 9.42 | 9.42 mg/l |
| 14 Aug 2025, 10:20 | 1.73 | 1.73 mg/l |
| 3 Jul 2025, 09:45 | 6.1 | 6.1 mg/l |
| 2 Jun 2025, 09:36 | 8.5 | 8.5 mg/l |
| 8 May 2025, 09:24 | 9.94 | 9.94 mg/l |
| 3 Apr 2025, 10:30 | 11 | 11 mg/l |
Water temperature
code 0076 · °C
8.7 °C
Sampled 4 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 8.7 | 8.7 °C |
| 12 Feb 2026, 10:01 | 6.9 | 6.9 °C |
| 7 Jan 2026, 10:26 | 2.7 | 2.7 °C |
| 2 Dec 2025, 10:15 | 5.8 | 5.8 °C |
| 5 Nov 2025, 13:13 | 13.2 | 13.2 °C |
| 23 Oct 2025, 12:25 | 11.5 | 11.5 °C |
| 23 Sep 2025, 10:20 | 11.6 | 11.6 °C |
| 14 Aug 2025, 10:20 | 20.2 | 20.2 °C |
| 3 Jul 2025, 09:45 | 16.8 | 16.8 °C |
| 2 Jun 2025, 09:36 | 15.1 | 15.1 °C |
| 8 May 2025, 09:24 | 13.4 | 13.4 °C |
| 3 Apr 2025, 10:30 | 10.4 | 10.4 °C |
pH
code 0061
8.11
Sampled 4 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 8.11 | 8.11 |
| 12 Feb 2026, 10:01 | 7.82 | 7.82 |
| 7 Jan 2026, 10:26 | 7.9 | 7.9 |
| 2 Dec 2025, 10:15 | 7.97 | 7.97 |
| 5 Nov 2025, 13:13 | 7.83 | 7.83 |
| 23 Oct 2025, 12:25 | 7.89 | 7.89 |
| 23 Sep 2025, 10:20 | 8.07 | 8.07 |
| 14 Aug 2025, 10:20 | 7.96 | 7.96 |
| 3 Jul 2025, 09:45 | 7.67 | 7.67 |
| 2 Jun 2025, 09:36 | 7.81 | 7.81 |
| 8 May 2025, 09:24 | 8.07 | 8.07 |
| 3 Apr 2025, 10:30 | 8.09 | 8.09 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.031 mg/l
Sampled 4 Mar 2026, 7 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 0.031 | 0.031 mg/l |
| 12 Feb 2026, 10:01 | 0.068 | 0.068 mg/l |
| 7 Jan 2026, 10:26 | 0.1 | 0.1 mg/l |
| 2 Dec 2025, 10:15 | 0.14 | 0.14 mg/l |
| 5 Nov 2025, 13:13 | 0.073 | 0.073 mg/l |
| 23 Oct 2025, 12:25 | 0.51 | 0.51 mg/l |
| 23 Sep 2025, 10:20 | 0.17 | 0.17 mg/l |
| 14 Aug 2025, 10:20 | 5.4 | 5.4 mg/l |
| 3 Jul 2025, 09:45 | 2.4 | 2.4 mg/l |
| 2 Jun 2025, 09:36 | 0.53 | 0.53 mg/l |
| 8 May 2025, 09:24 | 0.083 | 0.083 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.28 mg/l
Sampled 4 Mar 2026, 7 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 5.28 | 5.28 mg/l |
| 12 Feb 2026, 10:01 | 5.97 | 5.97 mg/l |
| 7 Jan 2026, 10:26 | 5.36 | 5.36 mg/l |
| 2 Dec 2025, 10:15 | 3.56 | 3.56 mg/l |
| 5 Nov 2025, 13:13 | 1.76 | 1.76 mg/l |
| 23 Oct 2025, 12:25 | 1.45 | 1.45 mg/l |
| 23 Sep 2025, 10:20 | 1.53 | 1.53 mg/l |
| 14 Aug 2025, 10:20 | 0.54 | 0.54 mg/l |
| 3 Jul 2025, 09:45 | 1.39 | 1.39 mg/l |
| 2 Jun 2025, 09:36 | 2.18 | 2.18 mg/l |
| 8 May 2025, 09:24 | 3.96 | 3.96 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.041 mg/l
Sampled 4 Mar 2026, 7 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 0.041 | 0.041 mg/l |
| 12 Feb 2026, 10:01 | 0.065 | 0.065 mg/l |
| 7 Jan 2026, 10:26 | 0.089 | 0.089 mg/l |
| 2 Dec 2025, 10:15 | 0.11 | 0.11 mg/l |
| 5 Nov 2025, 13:13 | 0.14 | 0.14 mg/l |
| 23 Oct 2025, 12:25 | 0.21 | 0.21 mg/l |
| 23 Sep 2025, 10:20 | 0.33 | 0.33 mg/l |
| 14 Aug 2025, 10:20 | 0.69 | 0.69 mg/l |
| 3 Jul 2025, 09:45 | 0.44 | 0.44 mg/l |
| 2 Jun 2025, 09:36 | 0.22 | 0.22 mg/l |
| 8 May 2025, 09:24 | 0.083 | 0.083 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
446 µS/cm
Sampled 4 Mar 2026, 7 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Mar 2026, 10:47 | 446 | 446 µS/cm |
| 12 Feb 2026, 10:01 | 442 | 442 µS/cm |
| 7 Jan 2026, 10:26 | 465 | 465 µS/cm |
| 2 Dec 2025, 10:15 | 498 | 498 µS/cm |
| 5 Nov 2025, 13:13 | 473 | 473 µS/cm |
| 23 Oct 2025, 12:25 | 461 | 461 µS/cm |
| 23 Sep 2025, 10:20 | 441 | 441 µS/cm |
| 14 Aug 2025, 10:20 | 516 | 516 µS/cm |
| 3 Jul 2025, 09:45 | 461 | 461 µS/cm |
| 2 Jun 2025, 09:36 | 454 | 454 µS/cm |
| 8 May 2025, 09:24 | 493 | 493 µS/cm |
| 3 Apr 2025, 10:30 | 467 | 467 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 | 12 | Apr 2025 – Mar 2026 | 99.7% 4 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Apr 2025 – Mar 2026 | 11.6 mg/l 4 Mar 2026 |
| Temperature of Water 0076 | River water | 12 | Apr 2025 – Mar 2026 | 8.7 °C 4 Mar 2026 |
| pH 0061 | River water | 12 | Apr 2025 – Mar 2026 | 8.11 4 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 11 | May 2025 – Mar 2026 | 0.031 mg/l 4 Mar 2026 |
| Nitrate as N 0117 | River water | 11 | May 2025 – Mar 2026 | 5.28 mg/l 4 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 11 | May 2025 – Mar 2026 | 0.041 mg/l 4 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 12 | Apr 2025 – Mar 2026 | 446 µS/cm 4 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 11 | May 2025 – Mar 2026 | 140 mg/l 4 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 11 | May 2025 – Mar 2026 | 0.00051 mg/l 4 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 10 | May 2025 – Mar 2026 | 1.7 mg/l 4 Mar 2026 |
| Chloride 0172 | River water | 11 | May 2025 – Mar 2026 | 30 mg/l 4 Mar 2026 |
| Nitrite as N 0118 | River water | 11 | May 2025 – Mar 2026 | 0.018 mg/l 4 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 11 | May 2025 – Mar 2026 | 5.3 mg/l 4 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 11 | May 2025 – Mar 2026 | 4.9 mg/l 4 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.