River Idle (Maun) - at Mattersey
EA name: RIVER IDLE (MAUN) - AT MATTERSEY
Environment Agency sampling point MD-38474920 · 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
- 22 May 2026, 07:594 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
- 24 since 18 Jun 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 469090, 389500As published, to the nearest 10 m. Open in a map
- River, by its own name
- Idle
- River, by the map
- River IdlePlaced on the river its name gives, 15 m from the line.
- Next gauge downstream
- Mattersey On the River Idle · 0.2 km along the river
- Nearest gauge upstream
- Ordsall On the River Idle · 17 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.4%
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 93.4 | 93.4% |
| 30 Apr 2026, 09:17 | 93.4 | 93.4% |
| 18 Mar 2026, 10:46 | 94.1 | 94.1% |
| 27 Feb 2026, 08:38 | 92.1 | 92.1% |
| 7 Jan 2026, 09:16 | 97.7 | 97.7% |
| 3 Dec 2025, 09:25 | 88.2 | 88.2% |
| 12 Nov 2025, 09:50 | 84 | 84% |
| 29 Oct 2025, 09:40 | 91.5 | 91.5% |
| 22 Sep 2025, 10:45 | 88.2 | 88.2% |
| 29 Aug 2025, 07:47 | 71.5 | 71.5% |
| 17 Jul 2025, 07:58 | 68.9 | 68.9% |
| 13 Jun 2025, 07:37 | 87.2 | 87.2% |
| 12 May 2025, 09:08 | 90 | 90% |
| 22 Apr 2025, 10:31 | 95.1 | 95.1% |
| 7 Mar 2025, 07:33 | 95.4 | 95.4% |
| 7 Feb 2025, 09:23 | 96.7 | 96.7% |
| 21 Jan 2025, 12:43 | 96 | 96% |
| 2 Dec 2024, 10:21 | 93.6 | 93.6% |
| 22 Nov 2024, 10:14 | 96 | 96% |
| 14 Oct 2024, 09:25 | 92.5 | 92.5% |
| 16 Sep 2024, 10:16 | 86.3 | 86.3% |
| 27 Aug 2024, 08:26 | 91.6 | 91.6% |
| 16 Jul 2024, 08:53 | 79.2 | 79.2% |
| 18 Jun 2024, 12:30 | 92.1 | 92.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.23 mg/l
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 9.23 | 9.23 mg/l |
| 30 Apr 2026, 09:17 | 9.97 | 9.97 mg/l |
| 18 Mar 2026, 10:46 | 10.7 | 10.7 mg/l |
| 27 Feb 2026, 08:38 | 10.5 | 10.5 mg/l |
| 7 Jan 2026, 09:16 | 13.6 | 13.6 mg/l |
| 3 Dec 2025, 09:25 | 10.8 | 10.8 mg/l |
| 12 Nov 2025, 09:50 | 9.12 | 9.12 mg/l |
| 29 Oct 2025, 09:40 | 10.4 | 10.4 mg/l |
| 22 Sep 2025, 10:45 | 9.36 | 9.36 mg/l |
| 29 Aug 2025, 07:47 | 6.99 | 6.99 mg/l |
| 17 Jul 2025, 07:58 | 6.47 | 6.47 mg/l |
| 13 Jun 2025, 07:37 | 8.28 | 8.28 mg/l |
| 12 May 2025, 09:08 | 9.03 | 9.03 mg/l |
| 22 Apr 2025, 10:31 | 10.3 | 10.3 mg/l |
| 7 Mar 2025, 07:33 | 11.2 | 11.2 mg/l |
| 7 Feb 2025, 09:23 | 12.8 | 12.8 mg/l |
| 21 Jan 2025, 12:43 | 12.1 | 12.1 mg/l |
| 2 Dec 2024, 10:21 | 11 | 11 mg/l |
| 22 Nov 2024, 10:14 | 13.1 | 13.1 mg/l |
| 14 Oct 2024, 09:25 | 10.6 | 10.6 mg/l |
| 16 Sep 2024, 10:16 | 9.2 | 9.2 mg/l |
| 27 Aug 2024, 08:26 | 9.08 | 9.08 mg/l |
| 16 Jul 2024, 08:53 | 7.7 | 7.7 mg/l |
| 18 Jun 2024, 12:30 | 8.99 | 8.99 mg/l |
Water temperature
code 0076 · °C
15.8 °C
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 15.8 | 15.8 °C |
| 30 Apr 2026, 09:17 | 12.3 | 12.3 °C |
| 18 Mar 2026, 10:46 | 9.8 | 9.8 °C |
| 27 Feb 2026, 08:38 | 9.6 | 9.6 °C |
| 7 Jan 2026, 09:16 | 1.8 | 1.8 °C |
| 3 Dec 2025, 09:25 | 6.5 | 6.5 °C |
| 12 Nov 2025, 09:50 | 11.6 | 11.6 °C |
| 29 Oct 2025, 09:40 | 9.5 | 9.5 °C |
| 22 Sep 2025, 10:45 | 12.6 | 12.6 °C |
| 29 Aug 2025, 07:47 | 16.3 | 16.3 °C |
| 17 Jul 2025, 07:58 | 18.3 | 18.3 °C |
| 13 Jun 2025, 07:37 | 17.7 | 17.7 °C |
| 12 May 2025, 09:08 | 15.1 | 15.1 °C |
| 22 Apr 2025, 10:31 | 11.8 | 11.8 °C |
| 7 Mar 2025, 07:33 | 8.4 | 8.4 °C |
| 7 Feb 2025, 09:23 | 3.7 | 3.7 °C |
| 21 Jan 2025, 12:43 | 5.4 | 5.4 °C |
| 2 Dec 2024, 10:21 | 8.4 | 8.4 °C |
| 22 Nov 2024, 10:14 | 2.5 | 2.5 °C |
| 14 Oct 2024, 09:25 | 9.2 | 9.2 °C |
| 16 Sep 2024, 10:16 | 12.4 | 12.4 °C |
| 27 Aug 2024, 08:26 | 15.7 | 15.7 °C |
| 16 Jul 2024, 08:53 | 16.6 | 16.6 °C |
| 18 Jun 2024, 12:30 | 16.4 | 16.4 °C |
pH
code 0061
8.63
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 8.63 | 8.63 |
| 30 Apr 2026, 09:17 | 8.22 | 8.22 |
| 18 Mar 2026, 10:46 | 8.24 | 8.24 |
| 27 Feb 2026, 08:38 | 8.12 | 8.12 |
| 7 Jan 2026, 09:16 | 8.15 | 8.15 |
| 3 Dec 2025, 09:25 | 7.82 | 7.82 |
| 12 Nov 2025, 09:50 | 7.88 | 7.88 |
| 29 Oct 2025, 09:40 | 8.11 | 8.11 |
| 22 Sep 2025, 10:45 | 7.86 | 7.86 |
| 29 Aug 2025, 07:47 | 8.18 | 8.18 |
| 17 Jul 2025, 07:58 | 7.75 | 7.75 |
| 13 Jun 2025, 07:37 | 8.48 | 8.48 |
| 12 May 2025, 09:08 | 8.51 | 8.51 |
| 22 Apr 2025, 10:31 | 8.24 | 8.24 |
| 7 Mar 2025, 07:33 | 8.4 | 8.4 |
| 7 Feb 2025, 09:23 | 8.32 | 8.32 |
| 21 Jan 2025, 12:43 | 8.03 | 8.03 |
| 2 Dec 2024, 10:21 | 8.08 | 8.08 |
| 22 Nov 2024, 10:14 | 8.11 | 8.11 |
| 14 Oct 2024, 09:25 | 8.16 | 8.16 |
| 16 Sep 2024, 10:16 | 8.11 | 8.11 |
| 27 Aug 2024, 08:26 | 8.3 | 8.3 |
| 16 Jul 2024, 08:53 | 7.9 | 7.9 |
| 18 Jun 2024, 12:30 | 8.03 | 8.03 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Apr 2026, 09:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2026, 10:46 | 0.033 | 0.033 mg/l |
| 27 Feb 2026, 08:38 | 0.047 | 0.047 mg/l |
| 7 Jan 2026, 09:16 | 0.37 | 0.37 mg/l |
| 3 Dec 2025, 09:25 | 0.082 | 0.082 mg/l |
| 12 Nov 2025, 09:50 | 0.36 | 0.36 mg/l |
| 29 Oct 2025, 09:40 | 0.04 | 0.04 mg/l |
| 22 Sep 2025, 10:45 | 0.04 | 0.04 mg/l |
| 29 Aug 2025, 07:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2025, 07:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jun 2025, 07:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 May 2025, 09:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2025, 10:31 | 0.043 | 0.043 mg/l |
| 7 Mar 2025, 07:33 | 0.075 | 0.075 mg/l |
| 7 Feb 2025, 09:23 | 0.072 | 0.072 mg/l |
| 21 Jan 2025, 12:43 | 0.16 | 0.16 mg/l |
| 2 Dec 2024, 10:21 | 0.069 | 0.069 mg/l |
| 22 Nov 2024, 10:14 | 0.14 | 0.14 mg/l |
| 14 Oct 2024, 09:25 | 0.051 | 0.051 mg/l |
| 16 Sep 2024, 10:16 | 0.063 | 0.063 mg/l |
| 27 Aug 2024, 08:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 08:53 | 0.041 | 0.041 mg/l |
| 18 Jun 2024, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.85 mg/l
Sampled 22 May 2026, 4 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 8.85 | 8.85 mg/l |
| 30 Apr 2026, 09:17 | 11 | 11 mg/l |
| 18 Mar 2026, 10:46 | 8.97 | 8.97 mg/l |
| 27 Feb 2026, 08:38 | 9.56 | 9.56 mg/l |
| 7 Jan 2026, 09:16 | 11.9 | 11.9 mg/l |
| 3 Dec 2025, 09:25 | 9.01 | 9.01 mg/l |
| 12 Nov 2025, 09:50 | 8.59 | 8.59 mg/l |
| 29 Oct 2025, 09:40 | 9.96 | 9.96 mg/l |
| 22 Sep 2025, 10:45 | 8.66 | 8.66 mg/l |
| 29 Aug 2025, 07:47 | 8.77 | 8.77 mg/l |
| 17 Jul 2025, 07:58 | 8.47 | 8.47 mg/l |
| 13 Jun 2025, 07:37 | 8.96 | 8.96 mg/l |
| 12 May 2025, 09:08 | 11 | 11 mg/l |
| 22 Apr 2025, 10:31 | 11.9 | 11.9 mg/l |
| 7 Mar 2025, 07:33 | 12 | 12 mg/l |
| 7 Feb 2025, 09:23 | 10.9 | 10.9 mg/l |
| 21 Jan 2025, 12:43 | 10.9 | 10.9 mg/l |
| 22 Nov 2024, 10:14 | 12 | 12 mg/l |
| 14 Oct 2024, 09:25 | 9.65 | 9.65 mg/l |
| 16 Sep 2024, 10:16 | 11 | 11 mg/l |
| 27 Aug 2024, 08:26 | 9.98 | 9.98 mg/l |
| 16 Jul 2024, 08:53 | 8.15 | 8.15 mg/l |
| 18 Jun 2024, 12:30 | 9.05 | 9.05 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.28 mg/l
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 0.28 | 0.28 mg/l |
| 30 Apr 2026, 09:17 | 0.18 | 0.18 mg/l |
| 18 Mar 2026, 10:46 | 0.13 | 0.13 mg/l |
| 27 Feb 2026, 08:38 | 0.14 | 0.14 mg/l |
| 7 Jan 2026, 09:16 | 0.22 | 0.22 mg/l |
| 3 Dec 2025, 09:25 | 0.25 | 0.25 mg/l |
| 12 Nov 2025, 09:50 | 0.49 | 0.49 mg/l |
| 29 Oct 2025, 09:40 | 0.34 | 0.34 mg/l |
| 22 Sep 2025, 10:45 | 0.42 | 0.42 mg/l |
| 29 Aug 2025, 07:47 | 0.33 | 0.33 mg/l |
| 17 Jul 2025, 07:58 | 0.42 | 0.42 mg/l |
| 13 Jun 2025, 07:37 | 0.31 | 0.31 mg/l |
| 12 May 2025, 09:08 | 0.31 | 0.31 mg/l |
| 22 Apr 2025, 10:31 | 0.21 | 0.21 mg/l |
| 7 Mar 2025, 07:33 | 0.18 | 0.18 mg/l |
| 7 Feb 2025, 09:23 | 0.21 | 0.21 mg/l |
| 21 Jan 2025, 12:43 | 0.17 | 0.17 mg/l |
| 2 Dec 2024, 10:21 | 0.24 | 0.24 mg/l |
| 22 Nov 2024, 10:14 | 0.26 | 0.26 mg/l |
| 14 Oct 2024, 09:25 | 0.28 | 0.28 mg/l |
| 16 Sep 2024, 10:16 | 0.33 | 0.33 mg/l |
| 27 Aug 2024, 08:26 | 0.24 | 0.24 mg/l |
| 16 Jul 2024, 08:53 | 0.23 | 0.23 mg/l |
| 18 Jun 2024, 12:30 | 0.22 | 0.22 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1015 µS/cm
Sampled 22 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 22 May 2026, 07:59 | 1015 | 1015 µS/cm |
| 30 Apr 2026, 09:17 | 980 | 980 µS/cm |
| 18 Mar 2026, 10:46 | 967 | 967 µS/cm |
| 27 Feb 2026, 08:38 | 979 | 979 µS/cm |
| 7 Jan 2026, 09:16 | 1182 | 1182 µS/cm |
| 3 Dec 2025, 09:25 | 866 | 866 µS/cm |
| 12 Nov 2025, 09:50 | 816 | 816 µS/cm |
| 29 Oct 2025, 09:40 | 953 | 953 µS/cm |
| 22 Sep 2025, 10:45 | 826 | 826 µS/cm |
| 29 Aug 2025, 07:47 | 1074 | 1074 µS/cm |
| 17 Jul 2025, 07:58 | 920 | 920 µS/cm |
| 13 Jun 2025, 07:37 | 1304 | 1304 µS/cm |
| 12 May 2025, 09:08 | 998 | 998 µS/cm |
| 22 Apr 2025, 10:31 | 996 | 996 µS/cm |
| 7 Mar 2025, 07:33 | 1035 | 1035 µS/cm |
| 7 Feb 2025, 09:23 | 992 | 992 µS/cm |
| 21 Jan 2025, 12:43 | 1211 | 1211 µS/cm |
| 2 Dec 2024, 10:21 | 1020 | 1020 µS/cm |
| 22 Nov 2024, 10:14 | 1328 | 1328 µS/cm |
| 14 Oct 2024, 09:25 | 885 | 885 µS/cm |
| 16 Sep 2024, 10:16 | 943 | 943 µS/cm |
| 27 Aug 2024, 08:26 | 1016 | 1016 µS/cm |
| 16 Jul 2024, 08:53 | 1006 | 1006 µS/cm |
| 18 Jun 2024, 12:30 | 891 | 891 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 | Jun 2024 – May 2026 | 93.4% 22 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 9.23 mg/l 22 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 15.8 °C 22 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 8.63 22 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 22 May 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – May 2026 | 8.85 mg/l 22 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.28 mg/l 22 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 1015 µS/cm 22 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 190 mg/l 22 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.00084 mg/l 22 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jun 2024 – May 2026 | 1.5 mg/l 22 May 2026 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – May 2026 | 0.047 mg/l 22 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 8.9 mg/l 22 May 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.