Black Brook 5 Metres above the confluence with Sankey Brook
EA name: BLACK BROOK 5 METRES PTC SANKEY BROOK
Environment Agency sampling point NW-88009756 · 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
- 7 Jul 2026, 12:183 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 21 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 Environmental monitoring statutory (EU directives)
- Where
- National Grid 354480, 395860As published, to the nearest 10 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Sankey BrookPlaced by position alone, on a line whose map name differs from its own, 18 m from the line.
- Next gauge downstream
- Causey Bridge On the Sankey Brook · 6.8 km along the river
- Nearest gauge upstream
- Ellamsbridge Road, St Helens On the Sutton Mill Brook · 4.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (17 samples)
Environmental monitoring statutory (EU directives) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.4%
Sampled 7 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 96.4 | 96.4% |
| 16 Jun 2026, 12:34 | 105.9 | 105.9% |
| 26 May 2026, 11:03 | 111.2 | 111.2% |
| 21 Apr 2026, 09:12 | 99.9 | 99.9% |
| 20 Mar 2025, 10:37 | 111.1 | 111.1% |
| 28 Jan 2025, 15:32 | 100.2 | 100.2% |
| 2 Dec 2024, 09:59 | 98.3 | 98.3% |
| 27 Nov 2024, 09:11 | 98 | 98% |
| 22 Nov 2024, 13:18 | 97.2 | 97.2% |
| 30 Oct 2024, 10:20 | 97.6 | 97.6% |
| 21 Oct 2024, 12:19 | 98.7 | 98.7% |
| 23 Aug 2024, 09:14 | 85.5 | 85.5% |
| 26 Jun 2024, 11:08 | 113.3 | 113.3% |
| 22 May 2024, 10:40 | 88.6 | 88.6% |
| 16 Apr 2024, 11:27 | 99.4 | 99.4% |
| 21 Mar 2024, 08:58 | 97.1 | 97.1% |
| 19 Feb 2024, 14:56 | 98.9 | 98.9% |
| 25 Jan 2024, 10:24 | 97.5 | 97.5% |
| 14 Dec 2023, 12:21 | 98 | 98% |
| 22 Nov 2023, 10:09 | 97.3 | 97.3% |
| 18 Oct 2023, 14:15 | 97.3 | 97.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.33 mg/l
Sampled 7 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 9.33 | 9.33 mg/l |
| 16 Jun 2026, 12:34 | 10.3 | 10.3 mg/l |
| 26 May 2026, 11:03 | 10.3 | 10.3 mg/l |
| 21 Apr 2026, 09:12 | 11.1 | 11.1 mg/l |
| 20 Mar 2025, 10:37 | 12.9 | 12.9 mg/l |
| 28 Jan 2025, 15:32 | 12.3 | 12.3 mg/l |
| 2 Dec 2024, 09:59 | 11.6 | 11.6 mg/l |
| 27 Nov 2024, 09:11 | 12.2 | 12.2 mg/l |
| 22 Nov 2024, 13:18 | 12.1 | 12.1 mg/l |
| 30 Oct 2024, 10:20 | 10.5 | 10.5 mg/l |
| 21 Oct 2024, 12:19 | 10.6 | 10.6 mg/l |
| 23 Aug 2024, 09:14 | 8.69 | 8.69 mg/l |
| 26 Jun 2024, 11:08 | 10.8 | 10.8 mg/l |
| 22 May 2024, 10:40 | 9.01 | 9.01 mg/l |
| 16 Apr 2024, 11:27 | 11.1 | 11.1 mg/l |
| 21 Mar 2024, 08:58 | 11.1 | 11.1 mg/l |
| 19 Feb 2024, 14:56 | 11.4 | 11.4 mg/l |
| 14 Dec 2023, 12:21 | 11.8 | 11.8 mg/l |
| 22 Nov 2023, 10:09 | 11.1 | 11.1 mg/l |
| 18 Oct 2023, 14:15 | 10.1 | 10.1 mg/l |
Water temperature
code 0076 · °C
16.8 °C
Sampled 7 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 16.8 | 16.8 °C |
| 16 Jun 2026, 12:34 | 16.4 | 16.4 °C |
| 26 May 2026, 11:03 | 18.9 | 18.9 °C |
| 21 Apr 2026, 09:12 | 10.5 | 10.5 °C |
| 20 Mar 2025, 10:37 | 8.9 | 8.9 °C |
| 28 Jan 2025, 15:32 | 6.4 | 6.4 °C |
| 2 Dec 2024, 09:59 | 8.2 | 8.2 °C |
| 27 Nov 2024, 09:11 | 6 | 6 °C |
| 22 Nov 2024, 13:18 | 6.1 | 6.1 °C |
| 30 Oct 2024, 10:20 | 11.9 | 11.9 °C |
| 21 Oct 2024, 12:19 | 11.9 | 11.9 °C |
| 23 Aug 2024, 09:14 | 14.5 | 14.5 °C |
| 26 Jun 2024, 11:08 | 17.4 | 17.4 °C |
| 22 May 2024, 10:40 | 14.5 | 14.5 °C |
| 16 Apr 2024, 11:27 | 10.2 | 10.2 °C |
| 21 Mar 2024, 08:58 | 9.3 | 9.3 °C |
| 19 Feb 2024, 14:56 | 9.1 | 9.1 °C |
| 14 Dec 2023, 12:21 | 7.3 | 7.3 °C |
| 22 Nov 2023, 10:09 | 9.6 | 9.6 °C |
| 18 Oct 2023, 14:15 | 13.6 | 13.6 °C |
pH
code 0061
8.02
Sampled 7 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 8.02 | 8.02 |
| 16 Jun 2026, 12:34 | 8.02 | 8.02 |
| 26 May 2026, 11:03 | 7.8 | 7.8 |
| 21 Apr 2026, 09:12 | 7.87 | 7.87 |
| 20 Mar 2025, 10:37 | 8.02 | 8.02 |
| 28 Jan 2025, 15:32 | 7.75 | 7.75 |
| 2 Dec 2024, 09:59 | 7.64 | 7.64 |
| 27 Nov 2024, 09:11 | 7.74 | 7.74 |
| 22 Nov 2024, 13:18 | 7.68 | 7.68 |
| 30 Oct 2024, 10:20 | 7.77 | 7.77 |
| 21 Oct 2024, 12:19 | 7.77 | 7.77 |
| 23 Aug 2024, 09:14 | 7.84 | 7.84 |
| 26 Jun 2024, 11:08 | 7.97 | 7.97 |
| 22 May 2024, 10:40 | 7.54 | 7.54 |
| 16 Apr 2024, 11:27 | 7.83 | 7.83 |
| 21 Mar 2024, 08:58 | 7.71 | 7.71 |
| 19 Feb 2024, 14:56 | 7.68 | 7.68 |
| 25 Jan 2024, 10:24 | 7.67 | 7.67 |
| 14 Dec 2023, 12:21 | 7.55 | 7.55 |
| 22 Nov 2023, 10:09 | 7.75 | 7.75 |
| 18 Oct 2023, 14:15 | 8.1 | 8.1 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.058 mg/l
Sampled 7 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 0.058 | 0.058 mg/l |
| 16 Jun 2026, 12:34 | 0.078 | 0.078 mg/l |
| 26 May 2026, 11:03 | 0.07 | 0.07 mg/l |
| 21 Apr 2026, 09:12 | 0.07 | 0.07 mg/l |
| 20 Mar 2025, 10:37 | 0.1 | 0.1 mg/l |
| 28 Jan 2025, 15:32 | 0.18 | 0.18 mg/l |
| 2 Dec 2024, 09:59 | 0.085 | 0.085 mg/l |
| 27 Nov 2024, 09:11 | 0.11 | 0.11 mg/l |
| 22 Nov 2024, 13:18 | 0.39 | 0.39 mg/l |
| 30 Oct 2024, 10:20 | 0.094 | 0.094 mg/l |
| 21 Oct 2024, 12:19 | 0.11 | 0.11 mg/l |
| 23 Aug 2024, 09:14 | 0.066 | 0.066 mg/l |
| 26 Jun 2024, 11:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2024, 10:40 | 2 | 2 mg/l |
| 16 Apr 2024, 11:27 | 0.18 | 0.18 mg/l |
| 21 Mar 2024, 08:58 | 0.1 | 0.1 mg/l |
| 19 Feb 2024, 14:56 | 0.096 | 0.096 mg/l |
| 25 Jan 2024, 10:24 | 0.16 | 0.16 mg/l |
| 14 Dec 2023, 12:21 | 0.17 | 0.17 mg/l |
| 22 Nov 2023, 10:09 | 0.13 | 0.13 mg/l |
| 18 Oct 2023, 14:15 | 0.082 | 0.082 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.663 mg/l
Sampled 7 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 0.663 | 0.663 mg/l |
| 16 Jun 2026, 12:34 | 0.926 | 0.926 mg/l |
| 26 May 2026, 11:03 | 12 | 12 mg/l |
| 21 Apr 2026, 09:12 | 1.57 | 1.57 mg/l |
| 20 Mar 2025, 10:37 | 1.88 | 1.88 mg/l |
| 28 Jan 2025, 15:32 | 2.87 | 2.87 mg/l |
| 27 Nov 2024, 09:11 | 4.56 | 4.56 mg/l |
| 22 Nov 2024, 13:18 | 3.36 | 3.36 mg/l |
| 30 Oct 2024, 10:20 | 4.03 | 4.03 mg/l |
| 21 Oct 2024, 12:19 | 4.35 | 4.35 mg/l |
| 23 Aug 2024, 09:14 | 1.08 | 1.08 mg/l |
| 26 Jun 2024, 11:08 | 1.68 | 1.68 mg/l |
| 22 May 2024, 10:40 | 0.901 | 0.901 mg/l |
| 16 Apr 2024, 11:27 | 2.07 | 2.07 mg/l |
| 21 Mar 2024, 08:58 | 1.97 | 1.97 mg/l |
| 19 Feb 2024, 14:56 | 1.98 | 1.98 mg/l |
| 25 Jan 2024, 10:24 | 1.88 | 1.88 mg/l |
| 14 Dec 2023, 12:21 | 2.37 | 2.37 mg/l |
| 22 Nov 2023, 10:09 | 2.66 | 2.66 mg/l |
| 18 Oct 2023, 14:15 | 3.15 | 3.15 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.048 mg/l
Sampled 7 Jul 2026, 3 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 0.048 | 0.048 mg/l |
| 16 Jun 2026, 12:34 | 0.038 | 0.038 mg/l |
| 26 May 2026, 11:03 | 0.51 | 0.51 mg/l |
| 21 Apr 2026, 09:12 | 0.037 | 0.037 mg/l |
| 20 Mar 2025, 10:37 | 0.022 | 0.022 mg/l |
| 28 Jan 2025, 15:32 | 0.068 | 0.068 mg/l |
| 2 Dec 2024, 09:59 | 0.073 | 0.073 mg/l |
| 27 Nov 2024, 09:11 | 0.089 | 0.089 mg/l |
| 22 Nov 2024, 13:18 | 0.14 | 0.14 mg/l |
| 30 Oct 2024, 10:20 | 0.072 | 0.072 mg/l |
| 21 Oct 2024, 12:19 | 0.095 | 0.095 mg/l |
| 23 Aug 2024, 09:14 | 0.062 | 0.062 mg/l |
| 26 Jun 2024, 11:08 | 0.039 | 0.039 mg/l |
| 22 May 2024, 10:40 | 0.14 | 0.14 mg/l |
| 16 Apr 2024, 11:27 | 0.048 | 0.048 mg/l |
| 21 Mar 2024, 08:58 | 0.021 | 0.021 mg/l |
| 19 Feb 2024, 14:56 | 0.023 | 0.023 mg/l |
| 14 Dec 2023, 12:21 | 0.02 | 0.02 mg/l |
| 22 Nov 2023, 10:09 | 0.027 | 0.027 mg/l |
| 18 Oct 2023, 14:15 | 0.048 | 0.048 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1329 µS/cm
Sampled 7 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Jul 2026, 12:18 | 1329 | 1329 µS/cm |
| 16 Jun 2026, 12:34 | 933 | 933 µS/cm |
| 26 May 2026, 11:03 | 934 | 934 µS/cm |
| 21 Apr 2026, 09:12 | 880 | 880 µS/cm |
| 20 Mar 2025, 10:37 | 785 | 785 µS/cm |
| 28 Jan 2025, 15:32 | 529 | 529 µS/cm |
| 2 Dec 2024, 09:59 | 483 | 483 µS/cm |
| 27 Nov 2024, 09:11 | 482 | 482 µS/cm |
| 22 Nov 2024, 13:18 | 622 | 622 µS/cm |
| 30 Oct 2024, 10:20 | 524 | 524 µS/cm |
| 21 Oct 2024, 12:19 | 444 | 444 µS/cm |
| 23 Aug 2024, 09:14 | 571 | 571 µS/cm |
| 26 Jun 2024, 11:08 | 847 | 847 µS/cm |
| 22 May 2024, 10:40 | 449 | 449 µS/cm |
| 16 Apr 2024, 11:27 | 520 | 520 µS/cm |
| 21 Mar 2024, 08:58 | 484 | 484 µS/cm |
| 19 Feb 2024, 14:56 | 427 | 427 µS/cm |
| 25 Jan 2024, 10:24 | 580 | 580 µS/cm |
| 14 Dec 2023, 12:21 | 560 | 560 µS/cm |
| 22 Nov 2023, 10:09 | 511 | 511 µS/cm |
| 18 Oct 2023, 14:15 | 577 | 577 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 | 21 | Oct 2023 – Jul 2026 | 96.4% 7 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Jul 2026 | 9.33 mg/l 7 Jul 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Jul 2026 | 16.8 °C 7 Jul 2026 |
| pH 0061 | River water | 21 | Oct 2023 – Jul 2026 | 8.02 7 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Oct 2023 – Jul 2026 | 0.058 mg/l 7 Jul 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Jul 2026 | 0.663 mg/l 7 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Oct 2023 – Jul 2026 | 0.048 mg/l 7 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – Jul 2026 | 1329 µS/cm 7 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Jul 2026 | 320 mg/l 7 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Oct 2023 – Jul 2026 | 0.00174 mg/l 7 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Oct 2023 – Jul 2026 | below 3 mg/l 7 Jul 2026 |
| Chloride 0172 | River water | 10 | Oct 2023 – Jul 2026 | 42 mg/l 7 Jul 2026 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – Jul 2026 | 0.027 mg/l 7 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Oct 2023 – Jul 2026 | 0.69 mg/l 7 Jul 2026 |
| Solids, Suspended at 105 C 0135 | River water | 10 | Oct 2023 – Jul 2026 | below 3 mg/l 7 Jul 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.