Redleadmill Brook upstream of Tupton sewage treatment works
EA name: REDLEADMILL BROOK U/S TUPTON STW
Environment Agency sampling point NE-49301340 · 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, 12:044 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
- 27 since 22 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 439078, 366590As published, to the nearest 1 m. Open in a map
- River, by its own name
- Redleadmill Brook
- River, by the map
- Redleadmill BrookPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Chesterfield Avenue Washlands On the River Rother · 3.7 km along the river
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
2 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.2%
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 96.2 | 96.2% |
| 13 May 2026, 09:28 | 95 | 95% |
| 30 Apr 2026, 11:19 | 95.7 | 95.7% |
| 26 Mar 2026, 11:04 | 100.3 | 100.3% |
| 24 Mar 2026, 12:28 | 104.4 | 104.4% |
| 11 Mar 2026, 10:29 | 102.9 | 102.9% |
| 19 Feb 2026, 13:23 | 100.1 | 100.1% |
| 13 Feb 2026, 09:23 | 97.5 | 97.5% |
| 18 Dec 2025, 12:47 | 99.6 | 99.6% |
| 11 Dec 2025, 11:31 | 99.2 | 99.2% |
| 25 Nov 2025, 08:59 | 99.3 | 99.3% |
| 21 Oct 2025, 08:54 | 91.6 | 91.6% |
| 26 Sep 2025, 09:09 | 94.5 | 94.5% |
| 6 Jun 2025, 10:17 | 93 | 93% |
| 30 May 2025, 13:56 | 89 | 89% |
| 25 Apr 2025, 09:20 | 100.6 | 100.6% |
| 7 Mar 2025, 09:50 | 103.3 | 103.3% |
| 14 Feb 2025, 11:41 | 102.3 | 102.3% |
| 30 Jan 2025, 09:30 | 101.2 | 101.2% |
| 9 Dec 2024, 09:53 | 99.8 | 99.8% |
| 27 Nov 2024, 09:00 | 100.7 | 100.7% |
| 15 Oct 2024, 10:49 | 96.3 | 96.3% |
| 18 Sep 2024, 10:37 | 95.8 | 95.8% |
| 30 Aug 2024, 08:44 | 94.8 | 94.8% |
| 22 Jul 2024, 10:21 | 95.6 | 95.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.4 mg/l
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 10.4 | 10.4 mg/l |
| 13 May 2026, 09:28 | 11.1 | 11.1 mg/l |
| 30 Apr 2026, 11:19 | 10.7 | 10.7 mg/l |
| 26 Mar 2026, 11:04 | 12.3 | 12.3 mg/l |
| 24 Mar 2026, 12:28 | 11.7 | 11.7 mg/l |
| 11 Mar 2026, 10:29 | 12.2 | 12.2 mg/l |
| 19 Feb 2026, 13:23 | 12.8 | 12.8 mg/l |
| 13 Feb 2026, 09:23 | 12.2 | 12.2 mg/l |
| 18 Dec 2025, 12:47 | 11.7 | 11.7 mg/l |
| 11 Dec 2025, 11:31 | 11.6 | 11.6 mg/l |
| 25 Nov 2025, 08:59 | 12.1 | 12.1 mg/l |
| 21 Oct 2025, 08:54 | 9.92 | 9.92 mg/l |
| 26 Sep 2025, 09:09 | 10.9 | 10.9 mg/l |
| 6 Jun 2025, 10:17 | 9.89 | 9.89 mg/l |
| 30 May 2025, 13:56 | 8.99 | 8.99 mg/l |
| 25 Apr 2025, 09:20 | 11.8 | 11.8 mg/l |
| 7 Mar 2025, 09:50 | 12.3 | 12.3 mg/l |
| 14 Feb 2025, 11:41 | 13.5 | 13.5 mg/l |
| 30 Jan 2025, 09:30 | 13.3 | 13.3 mg/l |
| 9 Dec 2024, 09:53 | 12.2 | 12.2 mg/l |
| 27 Nov 2024, 09:00 | 12.4 | 12.4 mg/l |
| 15 Oct 2024, 10:49 | 10.8 | 10.8 mg/l |
| 18 Sep 2024, 10:37 | 10.5 | 10.5 mg/l |
| 30 Aug 2024, 08:44 | 10.3 | 10.3 mg/l |
| 22 Jul 2024, 10:21 | 9.43 | 9.43 mg/l |
Water temperature
code 0076 · °C
11.8 °C
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 11.8 | 11.8 °C |
| 13 May 2026, 09:28 | 8.5 | 8.5 °C |
| 30 Apr 2026, 11:19 | 10.5 | 10.5 °C |
| 26 Mar 2026, 11:04 | 6.6 | 6.6 °C |
| 24 Mar 2026, 12:28 | 10.2 | 10.2 °C |
| 11 Mar 2026, 10:29 | 8 | 8 °C |
| 19 Feb 2026, 13:23 | 4.8 | 4.8 °C |
| 13 Feb 2026, 09:23 | 5.6 | 5.6 °C |
| 18 Dec 2025, 12:47 | 8.2 | 8.2 °C |
| 11 Dec 2025, 11:31 | 8.3 | 8.3 °C |
| 25 Nov 2025, 08:59 | 6.7 | 6.7 °C |
| 21 Oct 2025, 08:54 | 11.7 | 11.7 °C |
| 26 Sep 2025, 09:09 | 8.9 | 8.9 °C |
| 6 Jun 2025, 10:17 | 12.5 | 12.5 °C |
| 30 May 2025, 13:56 | 14.8 | 14.8 °C |
| 25 Apr 2025, 09:20 | 8.5 | 8.5 °C |
| 7 Mar 2025, 09:50 | 7.8 | 7.8 °C |
| 14 Feb 2025, 11:41 | 3.8 | 3.8 °C |
| 30 Jan 2025, 09:30 | 3.8 | 3.8 °C |
| 9 Dec 2024, 09:53 | 6.8 | 6.8 °C |
| 27 Nov 2024, 09:00 | 6.3 | 6.3 °C |
| 15 Oct 2024, 10:49 | 10.2 | 10.2 °C |
| 18 Sep 2024, 10:37 | 11.3 | 11.3 °C |
| 30 Aug 2024, 08:44 | 11.6 | 11.6 °C |
| 22 Jul 2024, 10:21 | 15.9 | 15.9 °C |
pH
code 0061
8.03
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 8.03 | 8.03 |
| 13 May 2026, 09:28 | 8.16 | 8.16 |
| 30 Apr 2026, 11:19 | 8.07 | 8.07 |
| 26 Mar 2026, 11:04 | 8.11 | 8.11 |
| 24 Mar 2026, 12:28 | 7.97 | 7.97 |
| 11 Mar 2026, 10:29 | 7.95 | 7.95 |
| 19 Feb 2026, 13:23 | 7.76 | 7.76 |
| 13 Feb 2026, 09:23 | 7.67 | 7.67 |
| 18 Dec 2025, 12:47 | 7.73 | 7.73 |
| 11 Dec 2025, 11:31 | 7.66 | 7.66 |
| 25 Nov 2025, 08:59 | 7.8 | 7.8 |
| 21 Oct 2025, 08:54 | 7.93 | 7.93 |
| 26 Sep 2025, 09:09 | 8.33 | 8.33 |
| 6 Jun 2025, 10:17 | 7.88 | 7.88 |
| 30 May 2025, 13:56 | 7.84 | 7.84 |
| 25 Apr 2025, 09:20 | 8.11 | 8.11 |
| 7 Mar 2025, 09:50 | 7.85 | 7.85 |
| 14 Feb 2025, 11:41 | 7.84 | 7.84 |
| 30 Jan 2025, 09:30 | 7.83 | 7.83 |
| 9 Dec 2024, 09:53 | 7.95 | 7.95 |
| 27 Nov 2024, 09:00 | 7.76 | 7.76 |
| 15 Oct 2024, 10:49 | 7.98 | 7.98 |
| 18 Sep 2024, 10:37 | 8.05 | 8.05 |
| 30 Aug 2024, 08:44 | 8.13 | 8.13 |
| 22 Jul 2024, 10:21 | 8.09 | 8.09 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2026, 09:28 | 0.036 | 0.036 mg/l |
| 30 Apr 2026, 11:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Mar 2026, 11:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Mar 2026, 12:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2026, 10:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2026, 13:23 | 0.049 | 0.049 mg/l |
| 13 Feb 2026, 09:23 | 0.032 | 0.032 mg/l |
| 18 Dec 2025, 12:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Dec 2025, 11:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Nov 2025, 08:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Oct 2025, 08:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Sep 2025, 09:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jun 2025, 10:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2025, 13:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Apr 2025, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2025, 09:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Feb 2025, 11:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jan 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2024, 09:53 | 0.031 | 0.031 mg/l |
| 27 Nov 2024, 09:00 | 0.045 | 0.045 mg/l |
| 15 Oct 2024, 10:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2024, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Aug 2024, 08:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jul 2024, 10:21 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.746 mg/l
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 0.746 | 0.746 mg/l |
| 13 May 2026, 09:28 | 0.94 | 0.94 mg/l |
| 30 Apr 2026, 11:19 | 1.1 | 1.1 mg/l |
| 26 Mar 2026, 11:04 | 1.3 | 1.3 mg/l |
| 24 Mar 2026, 12:28 | 1.4 | 1.4 mg/l |
| 11 Mar 2026, 10:29 | 1.7 | 1.7 mg/l |
| 19 Feb 2026, 13:23 | 2.09 | 2.09 mg/l |
| 13 Feb 2026, 09:23 | 1.89 | 1.89 mg/l |
| 18 Dec 2025, 12:47 | 2.29 | 2.29 mg/l |
| 11 Dec 2025, 11:31 | 2.59 | 2.59 mg/l |
| 25 Nov 2025, 08:59 | 2.69 | 2.69 mg/l |
| 21 Oct 2025, 08:54 | 1.29 | 1.29 mg/l |
| 26 Sep 2025, 09:09 | 0.526 | 0.526 mg/l |
| 6 Jun 2025, 10:17 | 0.835 | 0.835 mg/l |
| 30 May 2025, 13:56 | 0.951 | 0.951 mg/l |
| 25 Apr 2025, 09:20 | 0.994 | 0.994 mg/l |
| 7 Mar 2025, 09:50 | 1.49 | 1.49 mg/l |
| 14 Feb 2025, 11:41 | 1.69 | 1.69 mg/l |
| 30 Jan 2025, 09:30 | 2.19 | 2.19 mg/l |
| 9 Dec 2024, 09:53 | 1.79 | 1.79 mg/l |
| 27 Nov 2024, 09:00 | 1.89 | 1.89 mg/l |
| 15 Oct 2024, 10:49 | 1.2 | 1.2 mg/l |
| 18 Sep 2024, 10:37 | 0.896 | 0.896 mg/l |
| 30 Aug 2024, 08:44 | 1.1 | 1.1 mg/l |
| 22 Jul 2024, 10:21 | 0.926 | 0.926 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.028 mg/l
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 0.028 | 0.028 mg/l |
| 13 May 2026, 09:28 | <0.01 | below 0.01 mg/l (not detected above this) |
| 30 Apr 2026, 11:19 | 0.022 | 0.022 mg/l |
| 26 Mar 2026, 11:04 | 0.017 | 0.017 mg/l |
| 24 Mar 2026, 12:28 | 0.013 | 0.013 mg/l |
| 11 Mar 2026, 10:29 | 0.014 | 0.014 mg/l |
| 19 Feb 2026, 13:23 | 0.027 | 0.027 mg/l |
| 13 Feb 2026, 09:23 | 0.034 | 0.034 mg/l |
| 18 Dec 2025, 12:47 | 0.027 | 0.027 mg/l |
| 11 Dec 2025, 11:31 | 0.024 | 0.024 mg/l |
| 25 Nov 2025, 08:59 | 0.029 | 0.029 mg/l |
| 21 Oct 2025, 08:54 | 0.035 | 0.035 mg/l |
| 26 Sep 2025, 09:09 | 0.044 | 0.044 mg/l |
| 6 Jun 2025, 10:17 | 0.049 | 0.049 mg/l |
| 30 May 2025, 13:56 | 0.062 | 0.062 mg/l |
| 25 Apr 2025, 09:20 | 0.032 | 0.032 mg/l |
| 7 Mar 2025, 09:50 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Feb 2025, 11:41 | 0.023 | 0.023 mg/l |
| 30 Jan 2025, 09:30 | 0.021 | 0.021 mg/l |
| 9 Dec 2024, 09:53 | 0.033 | 0.033 mg/l |
| 27 Nov 2024, 09:00 | 0.037 | 0.037 mg/l |
| 15 Oct 2024, 10:49 | 0.024 | 0.024 mg/l |
| 18 Sep 2024, 10:37 | 0.044 | 0.044 mg/l |
| 30 Aug 2024, 08:44 | 0.039 | 0.039 mg/l |
| 22 Jul 2024, 10:21 | 0.037 | 0.037 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
336 µS/cm
Sampled 20 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 12:04 | 336 | 336 µS/cm |
| 13 May 2026, 09:28 | 216 | 216 µS/cm |
| 30 Apr 2026, 11:19 | 405 | 405 µS/cm |
| 26 Mar 2026, 11:04 | 278 | 278 µS/cm |
| 24 Mar 2026, 12:28 | 283 | 283 µS/cm |
| 11 Mar 2026, 10:29 | 284 | 284 µS/cm |
| 19 Feb 2026, 13:23 | 257 | 257 µS/cm |
| 13 Feb 2026, 09:23 | 219 | 219 µS/cm |
| 18 Dec 2025, 12:47 | 255 | 255 µS/cm |
| 11 Dec 2025, 11:31 | 240 | 240 µS/cm |
| 25 Nov 2025, 08:59 | 264 | 264 µS/cm |
| 21 Oct 2025, 08:54 | 431 | 431 µS/cm |
| 26 Sep 2025, 09:09 | 727 | 727 µS/cm |
| 6 Jun 2025, 10:17 | 429 | 429 µS/cm |
| 30 May 2025, 13:56 | 455 | 455 µS/cm |
| 25 Apr 2025, 09:20 | 395 | 395 µS/cm |
| 7 Mar 2025, 09:50 | 369 | 369 µS/cm |
| 14 Feb 2025, 11:41 | 297 | 297 µS/cm |
| 30 Jan 2025, 09:30 | 265 | 265 µS/cm |
| 9 Dec 2024, 09:53 | 252 | 252 µS/cm |
| 27 Nov 2024, 09:00 | 270 | 270 µS/cm |
| 15 Oct 2024, 10:49 | 277 | 277 µS/cm |
| 18 Sep 2024, 10:37 | 420 | 420 µS/cm |
| 30 Aug 2024, 08:44 | 469 | 469 µS/cm |
| 22 Jul 2024, 10:21 | 324 | 324 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 25 | Jul 2024 – May 2026 | 96.2% 20 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 25 | Jul 2024 – May 2026 | 10.4 mg/l 20 May 2026 |
| Temperature of Water 0076 | River water | 25 | Jul 2024 – May 2026 | 11.8 °C 20 May 2026 |
| pH 0061 | River water | 25 | Jul 2024 – May 2026 | 8.03 20 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Jul 2024 – May 2026 | below 0.03 mg/l 20 May 2026 |
| Nitrate as N 0117 | River water | 25 | Jul 2024 – May 2026 | 0.746 mg/l 20 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Jul 2024 – May 2026 | 0.028 mg/l 20 May 2026 |
| Conductivity at 25 C 0077 | River water | 25 | Jul 2024 – May 2026 | 336 µS/cm 20 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Jul 2024 – May 2026 | 94 mg/l 20 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 25 | Jul 2024 – May 2026 | below 0.00062 mg/l 20 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jul 2024 – May 2026 | 2 mg/l 20 May 2026 |
| Nitrite as N 0118 | River water | 25 | Jul 2024 – May 2026 | 0.0041 mg/l 20 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Jul 2024 – May 2026 | 0.75 mg/l 20 May 2026 |
| No flow /No sample 7668 | River water | 2 | Jul 2025 – Aug 2025 | No flow/discharge at sampling point 4 Aug 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.