Black Brook downstream of Upper Firth House Mill
EA name: BLACK BROOK D/S UPPER FIRTH HOUSE MILL
Environment Agency sampling point NE-49500037 · 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 Jun 2026, 12:014 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 24 since 18 Jul 2024 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 405997, 417646As published, to the nearest 1 m. Open in a map
- River, by its own name
- Black Brook
- River, by the map
- Black BrookPlaced on the river its name gives, 6 m from the line.
- Next gauge downstream
- Stainland Board Mills On the Black Brook · 2.1 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.3%
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | 102.3 | 102.3% |
| 12 May 2026, 10:56 | 101.1 | 101.1% |
| 30 Apr 2026, 10:19 | 100.9 | 100.9% |
| 16 Mar 2026, 14:40 | 101.7 | 101.7% |
| 24 Feb 2026, 14:57 | 101.4 | 101.4% |
| 29 Jan 2026, 14:04 | 100.6 | 100.6% |
| 9 Dec 2025, 11:46 | 99.3 | 99.3% |
| 6 Nov 2025, 13:18 | 100.7 | 100.7% |
| 14 Oct 2025, 11:43 | 101.4 | 101.4% |
| 22 Sep 2025, 12:11 | 101.4 | 101.4% |
| 6 Aug 2025, 09:23 | 100.4 | 100.4% |
| 16 Jul 2025, 11:49 | 102.6 | 102.6% |
| 2 Jun 2025, 11:56 | 101.6 | 101.6% |
| 13 May 2025, 12:16 | 104.8 | 104.8% |
| 25 Apr 2025, 11:52 | 104.8 | 104.8% |
| 9 Apr 2025, 11:18 | 104.7 | 104.7% |
| 19 Mar 2025, 10:01 | 105.4 | 105.4% |
| 30 Jan 2025, 07:33 | 102.8 | 102.8% |
| 9 Dec 2024, 10:56 | 99.8 | 99.8% |
| 27 Nov 2024, 11:26 | 102.2 | 102.2% |
| 22 Oct 2024, 12:47 | 97.1 | 97.1% |
| 19 Sep 2024, 11:02 | 99.8 | 99.8% |
| 22 Aug 2024, 08:36 | 101 | 101% |
| 18 Jul 2024, 06:47 | 102.2 | 102.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.2 mg/l
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | 11.2 | 11.2 mg/l |
| 12 May 2026, 10:56 | 11.8 | 11.8 mg/l |
| 30 Apr 2026, 10:19 | 11.7 | 11.7 mg/l |
| 16 Mar 2026, 14:40 | 12.4 | 12.4 mg/l |
| 24 Feb 2026, 14:57 | 12.4 | 12.4 mg/l |
| 29 Jan 2026, 14:04 | 12.7 | 12.7 mg/l |
| 9 Dec 2025, 11:46 | 11.2 | 11.2 mg/l |
| 6 Nov 2025, 13:18 | 10.5 | 10.5 mg/l |
| 14 Oct 2025, 11:43 | 11.1 | 11.1 mg/l |
| 22 Sep 2025, 12:11 | 11.2 | 11.2 mg/l |
| 6 Aug 2025, 09:23 | 10.5 | 10.5 mg/l |
| 16 Jul 2025, 11:49 | 10.2 | 10.2 mg/l |
| 2 Jun 2025, 11:56 | 10.8 | 10.8 mg/l |
| 13 May 2025, 12:16 | 11.2 | 11.2 mg/l |
| 25 Apr 2025, 11:52 | 11.9 | 11.9 mg/l |
| 9 Apr 2025, 11:18 | 12.3 | 12.3 mg/l |
| 19 Mar 2025, 10:01 | 13.6 | 13.6 mg/l |
| 30 Jan 2025, 07:33 | 12.7 | 12.7 mg/l |
| 9 Dec 2024, 10:56 | 11.9 | 11.9 mg/l |
| 27 Nov 2024, 11:26 | 12.1 | 12.1 mg/l |
| 22 Oct 2024, 12:47 | 10.7 | 10.7 mg/l |
| 19 Sep 2024, 11:02 | 10.9 | 10.9 mg/l |
| 22 Aug 2024, 08:36 | 10.5 | 10.5 mg/l |
| 18 Jul 2024, 06:47 | 10.8 | 10.8 mg/l |
Water temperature
code 0076 · °C
11.3 °C
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | 11.3 | 11.3 °C |
| 12 May 2026, 10:56 | 8.6 | 8.6 °C |
| 30 Apr 2026, 10:19 | 8.8 | 8.8 °C |
| 16 Mar 2026, 14:40 | 6.9 | 6.9 °C |
| 24 Feb 2026, 14:57 | 6.6 | 6.6 °C |
| 29 Jan 2026, 14:04 | 5.3 | 5.3 °C |
| 9 Dec 2025, 11:46 | 9.8 | 9.8 °C |
| 6 Nov 2025, 13:18 | 13.3 | 13.3 °C |
| 14 Oct 2025, 11:43 | 11.1 | 11.1 °C |
| 22 Sep 2025, 12:11 | 10.9 | 10.9 °C |
| 6 Aug 2025, 09:23 | 13.4 | 13.4 °C |
| 16 Jul 2025, 11:49 | 15.7 | 15.7 °C |
| 2 Jun 2025, 11:56 | 12.4 | 12.4 °C |
| 13 May 2025, 12:16 | 12.2 | 12.2 °C |
| 25 Apr 2025, 11:52 | 9.5 | 9.5 °C |
| 9 Apr 2025, 11:18 | 8.2 | 8.2 °C |
| 19 Mar 2025, 10:01 | 4.6 | 4.6 °C |
| 30 Jan 2025, 07:33 | 6.3 | 6.3 °C |
| 9 Dec 2024, 10:56 | 7.6 | 7.6 °C |
| 27 Nov 2024, 11:26 | 8.1 | 8.1 °C |
| 22 Oct 2024, 12:47 | 11 | 11 °C |
| 19 Sep 2024, 11:02 | 11.3 | 11.3 °C |
| 22 Aug 2024, 08:36 | 13.5 | 13.5 °C |
| 18 Jul 2024, 06:47 | 12.8 | 12.8 °C |
pH
code 0061
8.12
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | 8.12 | 8.12 |
| 12 May 2026, 10:56 | 7.79 | 7.79 |
| 30 Apr 2026, 10:19 | 7.89 | 7.89 |
| 16 Mar 2026, 14:40 | 7.28 | 7.28 |
| 24 Feb 2026, 14:57 | 7.14 | 7.14 |
| 29 Jan 2026, 14:04 | 7.69 | 7.69 |
| 9 Dec 2025, 11:46 | 7.83 | 7.83 |
| 6 Nov 2025, 13:18 | 7.92 | 7.92 |
| 14 Oct 2025, 11:43 | 7.44 | 7.44 |
| 22 Sep 2025, 12:11 | 7.93 | 7.93 |
| 6 Aug 2025, 09:23 | 8.04 | 8.04 |
| 16 Jul 2025, 11:49 | 8.04 | 8.04 |
| 2 Jun 2025, 11:56 | 7.86 | 7.86 |
| 13 May 2025, 12:16 | 8.04 | 8.04 |
| 25 Apr 2025, 11:52 | 8.12 | 8.12 |
| 9 Apr 2025, 11:18 | 8.04 | 8.04 |
| 19 Mar 2025, 10:01 | 7.92 | 7.92 |
| 30 Jan 2025, 07:33 | 8.12 | 8.12 |
| 9 Dec 2024, 10:56 | 7.86 | 7.86 |
| 27 Nov 2024, 11:26 | 8 | 8 |
| 22 Oct 2024, 12:47 | 7.49 | 7.49 |
| 19 Sep 2024, 11:02 | 7.85 | 7.85 |
| 22 Aug 2024, 08:36 | 7.95 | 7.95 |
| 18 Jul 2024, 06:47 | 7.79 | 7.79 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 May 2026, 10:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Apr 2026, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Mar 2026, 14:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Feb 2026, 14:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jan 2026, 14:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Nov 2025, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 11:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Sep 2025, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Aug 2025, 09:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2025, 11:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jun 2025, 11:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2025, 12:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Apr 2025, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2025, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2025, 10:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jan 2025, 07:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2024, 10:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Nov 2024, 11:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Oct 2024, 12:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Sep 2024, 11:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Aug 2024, 08:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2024, 06:47 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.496 mg/l
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | 0.496 | 0.496 mg/l |
| 12 May 2026, 10:56 | 0.496 | 0.496 mg/l |
| 30 Apr 2026, 10:19 | 0.526 | 0.526 mg/l |
| 16 Mar 2026, 14:40 | 0.596 | 0.596 mg/l |
| 24 Feb 2026, 14:57 | 0.676 | 0.676 mg/l |
| 29 Jan 2026, 14:04 | 0.716 | 0.716 mg/l |
| 9 Dec 2025, 11:46 | 0.846 | 0.846 mg/l |
| 6 Nov 2025, 13:18 | 0.886 | 0.886 mg/l |
| 14 Oct 2025, 11:43 | 0.586 | 0.586 mg/l |
| 22 Sep 2025, 12:11 | 0.996 | 0.996 mg/l |
| 6 Aug 2025, 09:23 | 0.416 | 0.416 mg/l |
| 16 Jul 2025, 11:49 | 0.486 | 0.486 mg/l |
| 2 Jun 2025, 11:56 | 0.526 | 0.526 mg/l |
| 13 May 2025, 12:16 | 0.514 | 0.514 mg/l |
| 25 Apr 2025, 11:52 | 0.516 | 0.516 mg/l |
| 9 Apr 2025, 11:18 | 0.506 | 0.506 mg/l |
| 19 Mar 2025, 10:01 | 0.626 | 0.626 mg/l |
| 30 Jan 2025, 07:33 | 0.906 | 0.906 mg/l |
| 9 Dec 2024, 10:56 | 0.986 | 0.986 mg/l |
| 27 Nov 2024, 11:26 | 1.2 | 1.2 mg/l |
| 22 Oct 2024, 12:47 | 0.696 | 0.696 mg/l |
| 19 Sep 2024, 11:02 | 0.895 | 0.895 mg/l |
| 22 Aug 2024, 08:36 | 0.396 | 0.396 mg/l |
| 18 Jul 2024, 06:47 | 0.486 | 0.486 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | <0.01 | below 0.01 mg/l (not detected above this) |
| 12 May 2026, 10:56 | 0.011 | 0.011 mg/l |
| 30 Apr 2026, 10:19 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Mar 2026, 14:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 24 Feb 2026, 14:57 | <0.01 | below 0.01 mg/l (not detected above this) |
| 29 Jan 2026, 14:04 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Dec 2025, 11:46 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 Nov 2025, 13:18 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Oct 2025, 11:43 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 Sep 2025, 12:11 | 0.014 | 0.014 mg/l |
| 6 Aug 2025, 09:23 | 0.012 | 0.012 mg/l |
| 16 Jul 2025, 11:49 | 0.018 | 0.018 mg/l |
| 2 Jun 2025, 11:56 | 0.011 | 0.011 mg/l |
| 13 May 2025, 12:16 | <0.01 | below 0.01 mg/l (not detected above this) |
| 25 Apr 2025, 11:52 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Apr 2025, 11:18 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Mar 2025, 10:01 | <0.01 | below 0.01 mg/l (not detected above this) |
| 30 Jan 2025, 07:33 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Dec 2024, 10:56 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Nov 2024, 11:26 | 0.011 | 0.011 mg/l |
| 22 Oct 2024, 12:47 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Sep 2024, 11:02 | 0.023 | 0.023 mg/l |
| 22 Aug 2024, 08:36 | 0.011 | 0.011 mg/l |
| 18 Jul 2024, 06:47 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
211 µS/cm
Sampled 15 Jun 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Jun 2026, 12:01 | 211 | 211 µS/cm |
| 12 May 2026, 10:56 | 238 | 238 µS/cm |
| 30 Apr 2026, 10:19 | 249 | 249 µS/cm |
| 16 Mar 2026, 14:40 | 128 | 128 µS/cm |
| 24 Feb 2026, 14:57 | 135 | 135 µS/cm |
| 29 Jan 2026, 14:04 | 164 | 164 µS/cm |
| 9 Dec 2025, 11:46 | 259 | 259 µS/cm |
| 6 Nov 2025, 13:18 | 282 | 282 µS/cm |
| 14 Oct 2025, 11:43 | 252 | 252 µS/cm |
| 22 Sep 2025, 12:11 | 293 | 293 µS/cm |
| 6 Aug 2025, 09:23 | 196 | 196 µS/cm |
| 16 Jul 2025, 11:49 | 212 | 212 µS/cm |
| 2 Jun 2025, 11:56 | 193 | 193 µS/cm |
| 13 May 2025, 12:16 | 209 | 209 µS/cm |
| 25 Apr 2025, 11:52 | 217 | 217 µS/cm |
| 9 Apr 2025, 11:18 | 221 | 221 µS/cm |
| 19 Mar 2025, 10:01 | 252 | 252 µS/cm |
| 30 Jan 2025, 07:33 | 277 | 277 µS/cm |
| 9 Dec 2024, 10:56 | 251 | 251 µS/cm |
| 27 Nov 2024, 11:26 | 256 | 256 µS/cm |
| 22 Oct 2024, 12:47 | 236 | 236 µS/cm |
| 19 Sep 2024, 11:02 | 334 | 334 µS/cm |
| 22 Aug 2024, 08:36 | 213 | 213 µS/cm |
| 18 Jul 2024, 06:47 | 229 | 229 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jul 2024 – Jun 2026 | 102.3% 15 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jul 2024 – Jun 2026 | 11.2 mg/l 15 Jun 2026 |
| Temperature of Water 0076 | River water | 24 | Jul 2024 – Jun 2026 | 11.3 °C 15 Jun 2026 |
| pH 0061 | River water | 24 | Jul 2024 – Jun 2026 | 8.12 15 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jul 2024 – Jun 2026 | below 0.03 mg/l 15 Jun 2026 |
| Nitrate as N 0117 | River water | 24 | Jul 2024 – Jun 2026 | 0.496 mg/l 15 Jun 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jul 2024 – Jun 2026 | below 0.01 mg/l 15 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jul 2024 – Jun 2026 | 211 µS/cm 15 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jul 2024 – Jun 2026 | 44 mg/l 15 Jun 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jul 2024 – Jun 2026 | below 0.0006 mg/l 15 Jun 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jul 2024 – Jun 2026 | 1.1 mg/l 15 Jun 2026 |
| Nitrite as N 0118 | River water | 24 | Jul 2024 – Jun 2026 | below 0.004 mg/l 15 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jul 2024 – Jun 2026 | 0.5 mg/l 15 Jun 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.