Mainsforth Stell upstream of Bishop Mham sewage treatment works at
EA name: MAINSFORTH STELL U/S BISHOP MHAM STW AT (also listed as “MAINSFORTH STELL U/S BISHOP MHAM STW AT PIPE BR”)
Environment Agency sampling point NE-45300061 · 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 Mar 2026, 09:446 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
- 26 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 432677, 530305As published, to the nearest 1 m. Open in a map
- River, by its own name
- Mainsforth Stell
- River, by the map
- The Carr DrainPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Preston-Le-Skerne On the River Skerne · 10.0 km along the river
- Why it was sampled
- Monitoring (national agency policy) (26 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
84.2%
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 84.2 | 84.2% |
| 4 Mar 2026, 09:23 | 85.8 | 85.8% |
| 17 Feb 2026, 14:04 | 98.8 | 98.8% |
| 4 Feb 2026, 09:57 | 79 | 79% |
| 21 Jan 2026, 14:30 | 82.4 | 82.4% |
| 16 Jan 2026, 12:20 | 83.1 | 83.1% |
| 18 Dec 2025, 10:11 | 93.1 | 93.1% |
| 5 Dec 2025, 09:39 | 77.5 | 77.5% |
| 27 Nov 2025, 13:57 | 95.9 | 95.9% |
| 14 Nov 2025, 08:41 | 63.3 | 63.3% |
| 5 Mar 2025, 12:39 | 87.8 | 87.8% |
| 4 Feb 2025, 10:45 | 80.3 | 80.3% |
| 21 Jan 2025, 09:35 | 82.5 | 82.5% |
| 3 Dec 2024, 11:15 | 71.9 | 71.9% |
| 19 Nov 2024, 12:24 | 80.1 | 80.1% |
| 23 Oct 2024, 09:46 | 70.1 | 70.1% |
| 26 Sep 2024, 08:35 | 95.5 | 95.5% |
| 21 Aug 2024, 13:37 | 83.1 | 83.1% |
| 24 Jul 2024, 11:18 | 82.9 | 82.9% |
| 26 Jun 2024, 08:37 | 66.1 | 66.1% |
| 18 Apr 2024, 12:51 | 79.3 | 79.3% |
| 18 Mar 2024, 09:52 | 74.3 | 74.3% |
| 21 Feb 2024, 10:25 | 79.2 | 79.2% |
| 15 Jan 2024, 11:15 | 100.9 | 100.9% |
| 6 Dec 2023, 10:58 | 68.1 | 68.1% |
| 16 Oct 2023, 11:21 | 66 | 66% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.74 mg/l
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 9.74 | 9.74 mg/l |
| 4 Mar 2026, 09:23 | 10.3 | 10.3 mg/l |
| 17 Feb 2026, 14:04 | 12 | 12 mg/l |
| 4 Feb 2026, 09:57 | 9.72 | 9.72 mg/l |
| 21 Jan 2026, 14:30 | 9.84 | 9.84 mg/l |
| 16 Jan 2026, 12:20 | 10.4 | 10.4 mg/l |
| 18 Dec 2025, 10:11 | 11.3 | 11.3 mg/l |
| 5 Dec 2025, 09:39 | 9.54 | 9.54 mg/l |
| 27 Nov 2025, 13:57 | 11.4 | 11.4 mg/l |
| 14 Nov 2025, 08:41 | 7.34 | 7.34 mg/l |
| 5 Mar 2025, 12:39 | 10.1 | 10.1 mg/l |
| 4 Feb 2025, 10:45 | 9.61 | 9.61 mg/l |
| 21 Jan 2025, 09:35 | 10.4 | 10.4 mg/l |
| 3 Dec 2024, 11:15 | 8.74 | 8.74 mg/l |
| 19 Nov 2024, 12:24 | 9.83 | 9.83 mg/l |
| 23 Oct 2024, 09:46 | 8.11 | 8.11 mg/l |
| 26 Sep 2024, 08:35 | 11 | 11 mg/l |
| 21 Aug 2024, 13:37 | 8.54 | 8.54 mg/l |
| 24 Jul 2024, 11:18 | 8.5 | 8.5 mg/l |
| 26 Jun 2024, 08:37 | 6.77 | 6.77 mg/l |
| 18 Apr 2024, 12:51 | 9.09 | 9.09 mg/l |
| 18 Mar 2024, 09:52 | 8.37 | 8.37 mg/l |
| 21 Feb 2024, 10:25 | 9.32 | 9.32 mg/l |
| 15 Jan 2024, 11:15 | 13.9 | 13.9 mg/l |
| 6 Dec 2023, 10:58 | 9.18 | 9.18 mg/l |
| 16 Oct 2023, 11:21 | 7.69 | 7.69 mg/l |
Water temperature
code 0076 · °C
8.9 °C
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 8.9 | 8.9 °C |
| 4 Mar 2026, 09:23 | 7.2 | 7.2 °C |
| 17 Feb 2026, 14:04 | 6.9 | 6.9 °C |
| 4 Feb 2026, 09:57 | 6.4 | 6.4 °C |
| 21 Jan 2026, 14:30 | 7.6 | 7.6 °C |
| 16 Jan 2026, 12:20 | 5.7 | 5.7 °C |
| 18 Dec 2025, 10:11 | 7.1 | 7.1 °C |
| 5 Dec 2025, 09:39 | 6.4 | 6.4 °C |
| 27 Nov 2025, 13:57 | 7.9 | 7.9 °C |
| 14 Nov 2025, 08:41 | 8.8 | 8.8 °C |
| 5 Mar 2025, 12:39 | 9.3 | 9.3 °C |
| 4 Feb 2025, 10:45 | 7.5 | 7.5 °C |
| 21 Jan 2025, 09:35 | 5.4 | 5.4 °C |
| 3 Dec 2024, 11:15 | 6.9 | 6.9 °C |
| 19 Nov 2024, 12:24 | 6.5 | 6.5 °C |
| 23 Oct 2024, 09:46 | 8.9 | 8.9 °C |
| 26 Sep 2024, 08:35 | 8.9 | 8.9 °C |
| 21 Aug 2024, 13:37 | 14 | 14 °C |
| 24 Jul 2024, 11:18 | 14.1 | 14.1 °C |
| 26 Jun 2024, 08:37 | 14.2 | 14.2 °C |
| 18 Apr 2024, 12:51 | 9.3 | 9.3 °C |
| 18 Mar 2024, 09:52 | 10 | 10 °C |
| 21 Feb 2024, 10:25 | 8.2 | 8.2 °C |
| 15 Jan 2024, 11:15 | 2 | 2 °C |
| 6 Dec 2023, 10:58 | 2.9 | 2.9 °C |
| 16 Oct 2023, 11:21 | 8.6 | 8.6 °C |
pH
code 0061
7.57
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 7.57 | 7.57 |
| 4 Mar 2026, 09:23 | 7.55 | 7.55 |
| 17 Feb 2026, 14:04 | 7.99 | 7.99 |
| 4 Feb 2026, 09:57 | 7.43 | 7.43 |
| 21 Jan 2026, 14:30 | 7.42 | 7.42 |
| 16 Jan 2026, 12:20 | 7.46 | 7.46 |
| 18 Dec 2025, 10:11 | 7.95 | 7.95 |
| 5 Dec 2025, 09:39 | 7.58 | 7.58 |
| 27 Nov 2025, 13:57 | 7.89 | 7.89 |
| 14 Nov 2025, 08:41 | 7.49 | 7.49 |
| 5 Mar 2025, 12:39 | 7.55 | 7.55 |
| 4 Feb 2025, 10:45 | 7.53 | 7.53 |
| 21 Jan 2025, 09:35 | 7.56 | 7.56 |
| 3 Dec 2024, 11:15 | 7.44 | 7.44 |
| 19 Nov 2024, 12:24 | 7.86 | 7.86 |
| 23 Oct 2024, 09:46 | 7.51 | 7.51 |
| 26 Sep 2024, 08:35 | 8.02 | 8.02 |
| 21 Aug 2024, 13:37 | 7.51 | 7.51 |
| 24 Jul 2024, 11:18 | 7.6 | 7.6 |
| 26 Jun 2024, 08:37 | 7.39 | 7.39 |
| 18 Apr 2024, 12:51 | 8.22 | 8.22 |
| 18 Mar 2024, 09:52 | 7.4 | 7.4 |
| 21 Feb 2024, 10:25 | 7.5 | 7.5 |
| 15 Jan 2024, 11:15 | 8.3 | 8.3 |
| 6 Dec 2023, 10:58 | 7.45 | 7.45 |
| 16 Oct 2023, 11:21 | 7.5 | 7.5 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 09:23 | 0.053 | 0.053 mg/l |
| 17 Feb 2026, 14:04 | 0.19 | 0.19 mg/l |
| 4 Feb 2026, 09:57 | 0.8 | 0.8 mg/l |
| 21 Jan 2026, 14:30 | 0.097 | 0.097 mg/l |
| 16 Jan 2026, 12:20 | 0.078 | 0.078 mg/l |
| 18 Dec 2025, 10:11 | 0.089 | 0.089 mg/l |
| 5 Dec 2025, 09:39 | 0.11 | 0.11 mg/l |
| 27 Nov 2025, 13:57 | 0.071 | 0.071 mg/l |
| 14 Nov 2025, 08:41 | 0.16 | 0.16 mg/l |
| 5 Mar 2025, 12:39 | 0.091 | 0.091 mg/l |
| 4 Feb 2025, 10:45 | 0.066 | 0.066 mg/l |
| 21 Jan 2025, 09:35 | 0.079 | 0.079 mg/l |
| 3 Dec 2024, 11:15 | 0.08 | 0.08 mg/l |
| 19 Nov 2024, 12:24 | 0.081 | 0.081 mg/l |
| 23 Oct 2024, 09:46 | 0.084 | 0.084 mg/l |
| 26 Sep 2024, 08:35 | 1.3 | 1.3 mg/l |
| 21 Aug 2024, 13:37 | 0.05 | 0.05 mg/l |
| 24 Jul 2024, 11:18 | 0.072 | 0.072 mg/l |
| 26 Jun 2024, 08:37 | 0.069 | 0.069 mg/l |
| 18 Apr 2024, 12:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 09:52 | 0.23 | 0.23 mg/l |
| 21 Feb 2024, 10:25 | 0.078 | 0.078 mg/l |
| 15 Jan 2024, 11:15 | 0.2 | 0.2 mg/l |
| 6 Dec 2023, 10:58 | 0.21 | 0.21 mg/l |
| 16 Oct 2023, 11:21 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.37 mg/l
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 7.37 | 7.37 mg/l |
| 4 Mar 2026, 09:23 | 7.36 | 7.36 mg/l |
| 17 Feb 2026, 14:04 | 5.68 | 5.68 mg/l |
| 4 Feb 2026, 09:57 | 6.95 | 6.95 mg/l |
| 21 Jan 2026, 14:30 | 7.07 | 7.07 mg/l |
| 16 Jan 2026, 12:20 | 6.58 | 6.58 mg/l |
| 18 Dec 2025, 10:11 | 18.9 | 18.9 mg/l |
| 5 Dec 2025, 09:39 | 5.77 | 5.77 mg/l |
| 27 Nov 2025, 13:57 | 9.77 | 9.77 mg/l |
| 14 Nov 2025, 08:41 | 6.75 | 6.75 mg/l |
| 5 Mar 2025, 12:39 | 8.46 | 8.46 mg/l |
| 4 Feb 2025, 10:45 | 7.28 | 7.28 mg/l |
| 21 Jan 2025, 09:35 | 6.98 | 6.98 mg/l |
| 3 Dec 2024, 11:15 | 7.17 | 7.17 mg/l |
| 19 Nov 2024, 12:24 | 7.87 | 7.87 mg/l |
| 23 Oct 2024, 09:46 | 6.85 | 6.85 mg/l |
| 26 Sep 2024, 08:35 | 11.9 | 11.9 mg/l |
| 21 Aug 2024, 13:37 | 7.27 | 7.27 mg/l |
| 24 Jul 2024, 11:18 | 7.07 | 7.07 mg/l |
| 26 Jun 2024, 08:37 | 7.26 | 7.26 mg/l |
| 18 Apr 2024, 12:51 | 0.964 | 0.964 mg/l |
| 18 Mar 2024, 09:52 | 7.11 | 7.11 mg/l |
| 21 Feb 2024, 10:25 | 6.07 | 6.07 mg/l |
| 15 Jan 2024, 11:15 | 5.66 | 5.66 mg/l |
| 6 Dec 2023, 10:58 | 3.97 | 3.97 mg/l |
| 16 Oct 2023, 11:21 | 8.36 | 8.36 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.011 mg/l
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 0.011 | 0.011 mg/l |
| 4 Mar 2026, 09:23 | 0.011 | 0.011 mg/l |
| 17 Feb 2026, 14:04 | 0.11 | 0.11 mg/l |
| 4 Feb 2026, 09:57 | <0.01 | below 0.01 mg/l (not detected above this) |
| 21 Jan 2026, 14:30 | 0.013 | 0.013 mg/l |
| 16 Jan 2026, 12:20 | 0.01 | 0.01 mg/l |
| 18 Dec 2025, 10:11 | 0.058 | 0.058 mg/l |
| 5 Dec 2025, 09:39 | 0.036 | 0.036 mg/l |
| 27 Nov 2025, 13:57 | 0.12 | 0.12 mg/l |
| 14 Nov 2025, 08:41 | 0.15 | 0.15 mg/l |
| 5 Mar 2025, 12:39 | 0.017 | 0.017 mg/l |
| 4 Feb 2025, 10:45 | 0.014 | 0.014 mg/l |
| 21 Jan 2025, 09:35 | 0.012 | 0.012 mg/l |
| 3 Dec 2024, 11:15 | 0.018 | 0.018 mg/l |
| 19 Nov 2024, 12:24 | 0.049 | 0.049 mg/l |
| 23 Oct 2024, 09:46 | 0.15 | 0.15 mg/l |
| 26 Sep 2024, 08:35 | 0.19 | 0.19 mg/l |
| 21 Aug 2024, 13:37 | 0.18 | 0.18 mg/l |
| 24 Jul 2024, 11:18 | 0.14 | 0.14 mg/l |
| 26 Jun 2024, 08:37 | 0.15 | 0.15 mg/l |
| 18 Apr 2024, 12:51 | 0.016 | 0.016 mg/l |
| 18 Mar 2024, 09:52 | 0.11 | 0.11 mg/l |
| 21 Feb 2024, 10:25 | 0.066 | 0.066 mg/l |
| 15 Jan 2024, 11:15 | 0.25 | 0.25 mg/l |
| 6 Dec 2023, 10:58 | 0.079 | 0.079 mg/l |
| 16 Oct 2023, 11:21 | 0.24 | 0.24 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1110 µS/cm
Sampled 20 Mar 2026, 6 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Mar 2026, 09:44 | 1110 | 1110 µS/cm |
| 4 Mar 2026, 09:23 | 1117 | 1117 µS/cm |
| 17 Feb 2026, 14:04 | 601 | 601 µS/cm |
| 4 Feb 2026, 09:57 | 1063 | 1063 µS/cm |
| 21 Jan 2026, 14:30 | 1123 | 1123 µS/cm |
| 16 Jan 2026, 12:20 | 1255 | 1255 µS/cm |
| 18 Dec 2025, 10:11 | 1200 | 1200 µS/cm |
| 5 Dec 2025, 09:39 | 855 | 855 µS/cm |
| 27 Nov 2025, 13:57 | 749 | 749 µS/cm |
| 14 Nov 2025, 08:41 | 590 | 590 µS/cm |
| 5 Mar 2025, 12:39 | 1090 | 1090 µS/cm |
| 4 Feb 2025, 10:45 | 1129 | 1129 µS/cm |
| 21 Jan 2025, 09:35 | 1184 | 1184 µS/cm |
| 3 Dec 2024, 11:15 | 1126 | 1126 µS/cm |
| 19 Nov 2024, 12:24 | 1132 | 1132 µS/cm |
| 23 Oct 2024, 09:46 | 1093 | 1093 µS/cm |
| 26 Sep 2024, 08:35 | 611 | 611 µS/cm |
| 21 Aug 2024, 13:37 | 1154 | 1154 µS/cm |
| 24 Jul 2024, 11:18 | 1176 | 1176 µS/cm |
| 26 Jun 2024, 08:37 | 1161 | 1161 µS/cm |
| 18 Apr 2024, 12:51 | 589 | 589 µS/cm |
| 18 Mar 2024, 09:52 | 1098 | 1098 µS/cm |
| 21 Feb 2024, 10:25 | 1029 | 1029 µS/cm |
| 15 Jan 2024, 11:15 | 799 | 799 µS/cm |
| 6 Dec 2023, 10:58 | 697 | 697 µS/cm |
| 16 Oct 2023, 11:21 | 1141 | 1141 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 | 26 | Oct 2023 – Mar 2026 | 84.2% 20 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Oct 2023 – Mar 2026 | 9.74 mg/l 20 Mar 2026 |
| Temperature of Water 0076 | River water | 26 | Oct 2023 – Mar 2026 | 8.9 °C 20 Mar 2026 |
| pH 0061 | River water | 26 | Oct 2023 – Mar 2026 | 7.57 20 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Oct 2023 – Mar 2026 | below 0.03 mg/l 20 Mar 2026 |
| Nitrate as N 0117 | River water | 26 | Oct 2023 – Mar 2026 | 7.37 mg/l 20 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Oct 2023 – Mar 2026 | 0.011 mg/l 20 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Oct 2023 – Mar 2026 | 1110 µS/cm 20 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Oct 2023 – Mar 2026 | 290 mg/l 20 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Oct 2023 – Mar 2026 | below 0.00019 mg/l 20 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Feb 2024 – Mar 2026 | 1.1 mg/l 20 Mar 2026 |
| Nitrite as N 0118 | River water | 26 | Oct 2023 – Mar 2026 | 0.033 mg/l 20 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Oct 2023 – Mar 2026 | 7.4 mg/l 20 Mar 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.