Rothley Brook at Merrylees
EA name: ROTHLEY BROOK AT MERRYLEES
Environment Agency sampling point MD-47233820 · 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
- 17 Dec 2025, 09:509 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
- 22 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 447100, 306110As published, to the nearest 10 m. Open in a map
- River, by its own name
- Rothley Brook
- River, by the map
- Rothley BrookPlaced on the river its name gives, 85 m from the line.
- Next gauge downstream
- Glenfield On the Rothley Brook · 11 km along the river
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
97.2%
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 97.2 | 97.2% |
| 2 Dec 2025, 08:28 | 96.4 | 96.4% |
| 19 Nov 2025, 09:53 | 92.7 | 92.7% |
| 5 Nov 2025, 10:04 | 86.9 | 86.9% |
| 12 Mar 2025, 09:17 | 98.5 | 98.5% |
| 3 Feb 2025, 08:29 | 99.9 | 99.9% |
| 20 Jan 2025, 10:38 | 99.6 | 99.6% |
| 3 Dec 2024, 08:51 | 95.3 | 95.3% |
| 18 Nov 2024, 11:11 | 92.2 | 92.2% |
| 17 Oct 2024, 09:21 | 92.2 | 92.2% |
| 16 Sep 2024, 10:13 | 94.3 | 94.3% |
| 19 Aug 2024, 08:52 | 95.3 | 95.3% |
| 16 Jul 2024, 08:21 | 91.9 | 91.9% |
| 24 Jun 2024, 12:45 | 93.9 | 93.9% |
| 23 May 2024, 13:01 | 93.7 | 93.7% |
| 23 Apr 2024, 08:20 | 96.8 | 96.8% |
| 18 Mar 2024, 13:35 | 98.1 | 98.1% |
| 19 Feb 2024, 08:37 | 95.7 | 95.7% |
| 15 Jan 2024, 08:24 | 99.8 | 99.8% |
| 15 Dec 2023, 09:27 | 96.7 | 96.7% |
| 20 Nov 2023, 08:16 | 94.5 | 94.5% |
| 16 Oct 2023, 12:50 | 93.7 | 93.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12 mg/l
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 12 | 12 mg/l |
| 2 Dec 2025, 08:28 | 11.6 | 11.6 mg/l |
| 19 Nov 2025, 09:53 | 11.3 | 11.3 mg/l |
| 5 Nov 2025, 10:04 | 9.18 | 9.18 mg/l |
| 12 Mar 2025, 09:17 | 12.3 | 12.3 mg/l |
| 3 Feb 2025, 08:29 | 12.8 | 12.8 mg/l |
| 20 Jan 2025, 10:38 | 12.8 | 12.8 mg/l |
| 3 Dec 2024, 08:51 | 11.7 | 11.7 mg/l |
| 18 Nov 2024, 11:11 | 10.9 | 10.9 mg/l |
| 17 Oct 2024, 09:21 | 9.85 | 9.85 mg/l |
| 16 Sep 2024, 10:13 | 10.3 | 10.3 mg/l |
| 19 Aug 2024, 08:52 | 10.1 | 10.1 mg/l |
| 16 Jul 2024, 08:21 | 9.24 | 9.24 mg/l |
| 24 Jun 2024, 12:45 | 9.01 | 9.01 mg/l |
| 23 May 2024, 13:01 | 9.81 | 9.81 mg/l |
| 23 Apr 2024, 08:20 | 11.3 | 11.3 mg/l |
| 18 Mar 2024, 13:35 | 10.9 | 10.9 mg/l |
| 19 Feb 2024, 08:37 | 11.1 | 11.1 mg/l |
| 15 Jan 2024, 08:24 | 13.6 | 13.6 mg/l |
| 15 Dec 2023, 09:27 | 11.8 | 11.8 mg/l |
| 20 Nov 2023, 08:16 | 11 | 11 mg/l |
| 16 Oct 2023, 12:50 | 10.7 | 10.7 mg/l |
Water temperature
code 0076 · °C
6.4 °C
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 6.4 | 6.4 °C |
| 2 Dec 2025, 08:28 | 7.3 | 7.3 °C |
| 19 Nov 2025, 09:53 | 6.7 | 6.7 °C |
| 5 Nov 2025, 10:04 | 12.8 | 12.8 °C |
| 12 Mar 2025, 09:17 | 5.7 | 5.7 °C |
| 3 Feb 2025, 08:29 | 4.8 | 4.8 °C |
| 20 Jan 2025, 10:38 | 4.8 | 4.8 °C |
| 3 Dec 2024, 08:51 | 6.5 | 6.5 °C |
| 18 Nov 2024, 11:11 | 7.9 | 7.9 °C |
| 17 Oct 2024, 09:21 | 12.3 | 12.3 °C |
| 16 Sep 2024, 10:13 | 11.5 | 11.5 °C |
| 19 Aug 2024, 08:52 | 12.6 | 12.6 °C |
| 16 Jul 2024, 08:21 | 15 | 15 °C |
| 24 Jun 2024, 12:45 | 17.2 | 17.2 °C |
| 23 May 2024, 13:01 | 13.2 | 13.2 °C |
| 23 Apr 2024, 08:20 | 8.6 | 8.6 °C |
| 18 Mar 2024, 13:35 | 10.5 | 10.5 °C |
| 19 Feb 2024, 08:37 | 8.7 | 8.7 °C |
| 15 Jan 2024, 08:24 | 2.6 | 2.6 °C |
| 15 Dec 2023, 09:27 | 6.6 | 6.6 °C |
| 20 Nov 2023, 08:16 | 8.8 | 8.8 °C |
| 16 Oct 2023, 12:50 | 9.6 | 9.6 °C |
pH
code 0061
7.97
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 7.97 | 7.97 |
| 2 Dec 2025, 08:28 | 7.76 | 7.76 |
| 19 Nov 2025, 09:53 | 7.82 | 7.82 |
| 5 Nov 2025, 10:04 | 7.86 | 7.86 |
| 12 Mar 2025, 09:17 | 8.16 | 8.16 |
| 3 Feb 2025, 08:29 | 8.01 | 8.01 |
| 20 Jan 2025, 10:38 | 7.95 | 7.95 |
| 3 Dec 2024, 08:51 | 7.89 | 7.89 |
| 18 Nov 2024, 11:11 | 7.93 | 7.93 |
| 17 Oct 2024, 09:21 | 7.87 | 7.87 |
| 16 Sep 2024, 10:13 | 8.07 | 8.07 |
| 19 Aug 2024, 08:52 | 8.07 | 8.07 |
| 16 Jul 2024, 08:21 | 7.83 | 7.83 |
| 24 Jun 2024, 12:45 | 7.92 | 7.92 |
| 23 May 2024, 13:01 | 7.84 | 7.84 |
| 23 Apr 2024, 08:20 | 7.95 | 7.95 |
| 18 Mar 2024, 13:35 | 7.91 | 7.91 |
| 19 Feb 2024, 08:37 | 7.93 | 7.93 |
| 15 Jan 2024, 08:24 | 8.04 | 8.04 |
| 15 Dec 2023, 09:27 | 7.72 | 7.72 |
| 20 Nov 2023, 08:16 | 7.9 | 7.9 |
| 16 Oct 2023, 12:50 | 7.82 | 7.82 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.039 mg/l
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 0.039 | 0.039 mg/l |
| 2 Dec 2025, 08:28 | 0.039 | 0.039 mg/l |
| 19 Nov 2025, 09:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Mar 2025, 09:17 | 0.069 | 0.069 mg/l |
| 3 Feb 2025, 08:29 | 0.14 | 0.14 mg/l |
| 20 Jan 2025, 10:38 | 0.12 | 0.12 mg/l |
| 3 Dec 2024, 08:51 | 0.041 | 0.041 mg/l |
| 18 Nov 2024, 11:11 | 0.063 | 0.063 mg/l |
| 17 Oct 2024, 09:21 | 0.034 | 0.034 mg/l |
| 16 Sep 2024, 10:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 08:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 08:21 | 0.087 | 0.087 mg/l |
| 24 Jun 2024, 12:45 | 0.077 | 0.077 mg/l |
| 23 May 2024, 13:01 | 0.27 | 0.27 mg/l |
| 23 Apr 2024, 08:20 | 0.2 | 0.2 mg/l |
| 18 Mar 2024, 13:35 | 0.12 | 0.12 mg/l |
| 19 Feb 2024, 08:37 | 0.087 | 0.087 mg/l |
| 15 Jan 2024, 08:24 | 0.11 | 0.11 mg/l |
| 15 Dec 2023, 09:27 | 0.055 | 0.055 mg/l |
| 20 Nov 2023, 08:16 | 0.036 | 0.036 mg/l |
| 16 Oct 2023, 12:50 | 0.082 | 0.082 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.18 mg/l
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 7.18 | 7.18 mg/l |
| 2 Dec 2025, 08:28 | 8.39 | 8.39 mg/l |
| 19 Nov 2025, 09:53 | 8.18 | 8.18 mg/l |
| 5 Nov 2025, 10:04 | 5.19 | 5.19 mg/l |
| 12 Mar 2025, 09:17 | 7.88 | 7.88 mg/l |
| 3 Feb 2025, 08:29 | 6.78 | 6.78 mg/l |
| 20 Jan 2025, 10:38 | 7.48 | 7.48 mg/l |
| 3 Dec 2024, 08:51 | 6.28 | 6.28 mg/l |
| 18 Nov 2024, 11:11 | 6.86 | 6.86 mg/l |
| 17 Oct 2024, 09:21 | 6.17 | 6.17 mg/l |
| 16 Sep 2024, 10:13 | 6.58 | 6.58 mg/l |
| 19 Aug 2024, 08:52 | 6.69 | 6.69 mg/l |
| 16 Jul 2024, 08:21 | 4.37 | 4.37 mg/l |
| 24 Jun 2024, 12:45 | 8.34 | 8.34 mg/l |
| 23 May 2024, 13:01 | 10.9 | 10.9 mg/l |
| 23 Apr 2024, 08:20 | 6.27 | 6.27 mg/l |
| 18 Mar 2024, 13:35 | 4.97 | 4.97 mg/l |
| 19 Feb 2024, 08:37 | 4.19 | 4.19 mg/l |
| 15 Jan 2024, 08:24 | 7.08 | 7.08 mg/l |
| 15 Dec 2023, 09:27 | 5.28 | 5.28 mg/l |
| 20 Nov 2023, 08:16 | 5.49 | 5.49 mg/l |
| 16 Oct 2023, 12:50 | 6.27 | 6.27 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.062 mg/l
Sampled 17 Dec 2025, 9 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 0.062 | 0.062 mg/l |
| 2 Dec 2025, 08:28 | 0.075 | 0.075 mg/l |
| 19 Nov 2025, 09:53 | 0.078 | 0.078 mg/l |
| 5 Nov 2025, 10:04 | 0.027 | 0.027 mg/l |
| 12 Mar 2025, 09:17 | 0.015 | 0.015 mg/l |
| 3 Feb 2025, 08:29 | 0.022 | 0.022 mg/l |
| 20 Jan 2025, 10:38 | 0.022 | 0.022 mg/l |
| 18 Nov 2024, 11:11 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Oct 2024, 09:21 | 0.041 | 0.041 mg/l |
| 16 Sep 2024, 10:13 | 0.035 | 0.035 mg/l |
| 19 Aug 2024, 08:52 | 0.029 | 0.029 mg/l |
| 16 Jul 2024, 08:21 | 0.086 | 0.086 mg/l |
| 24 Jun 2024, 12:45 | 0.018 | 0.018 mg/l |
| 23 May 2024, 13:01 | 0.027 | 0.027 mg/l |
| 23 Apr 2024, 08:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Mar 2024, 13:35 | 0.022 | 0.022 mg/l |
| 19 Feb 2024, 08:37 | 0.048 | 0.048 mg/l |
| 15 Jan 2024, 08:24 | 0.029 | 0.029 mg/l |
| 15 Dec 2023, 09:27 | 0.048 | 0.048 mg/l |
| 20 Nov 2023, 08:16 | 0.04 | 0.04 mg/l |
| 16 Oct 2023, 12:50 | 0.062 | 0.062 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
792 µS/cm
Sampled 17 Dec 2025, 9 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2025, 09:50 | 792 | 792 µS/cm |
| 2 Dec 2025, 08:28 | 640 | 640 µS/cm |
| 19 Nov 2025, 09:53 | 704 | 704 µS/cm |
| 5 Nov 2025, 10:04 | 893 | 893 µS/cm |
| 12 Mar 2025, 09:17 | 1222 | 1222 µS/cm |
| 3 Feb 2025, 08:29 | 1281 | 1281 µS/cm |
| 20 Jan 2025, 10:38 | 1468 | 1468 µS/cm |
| 3 Dec 2024, 08:51 | 832 | 832 µS/cm |
| 18 Nov 2024, 11:11 | 1962 | 1962 µS/cm |
| 17 Oct 2024, 09:21 | 1116 | 1116 µS/cm |
| 16 Sep 2024, 10:13 | 1320 | 1320 µS/cm |
| 19 Aug 2024, 08:52 | 1162 | 1162 µS/cm |
| 16 Jul 2024, 08:21 | 1217 | 1217 µS/cm |
| 24 Jun 2024, 12:45 | 2819 | 2819 µS/cm |
| 23 May 2024, 13:01 | 1087 | 1087 µS/cm |
| 23 Apr 2024, 08:20 | 1622 | 1622 µS/cm |
| 18 Mar 2024, 13:35 | 1058 | 1058 µS/cm |
| 19 Feb 2024, 08:37 | 574 | 574 µS/cm |
| 15 Jan 2024, 08:24 | 1090 | 1090 µS/cm |
| 15 Dec 2023, 09:27 | 638 | 638 µS/cm |
| 20 Nov 2023, 08:16 | 653 | 653 µS/cm |
| 16 Oct 2023, 12:50 | 1051 | 1051 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 | 22 | Oct 2023 – Dec 2025 | 97.2% 17 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – Dec 2025 | 12 mg/l 17 Dec 2025 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – Dec 2025 | 6.4 °C 17 Dec 2025 |
| pH 0061 | River water | 22 | Oct 2023 – Dec 2025 | 7.97 17 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – Dec 2025 | 0.039 mg/l 17 Dec 2025 |
| Nitrate as N 0117 | River water | 22 | Oct 2023 – Dec 2025 | 7.18 mg/l 17 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Dec 2025 | 0.062 mg/l 17 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – Dec 2025 | 792 µS/cm 17 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – Dec 2025 | 170 mg/l 17 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Dec 2025 | 0.00051 mg/l 17 Dec 2025 |
| BOD : 5 Day ATU 0085 | River water | 18 | Feb 2024 – Dec 2025 | 1.3 mg/l 17 Dec 2025 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – Dec 2025 | 0.017 mg/l 17 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Oct 2023 – Dec 2025 | 7.2 mg/l 17 Dec 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.