North Mills Brook upstream of South Petherton sewage treatment works
EA name: NORTH MILLS BK US SOUTH PETHERTON STW
Environment Agency sampling point SW-E3170200 · 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
- 29 May 2026, 10:554 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 19 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 343311, 117011As published, to the nearest 1 m. Open in a map
- River, by its own name
- North Mills Brook
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
91.7%
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 91.7 | 91.7% |
| 7 Apr 2026, 09:17 | 91.5 | 91.5% |
| 12 Mar 2026, 11:35 | 85.1 | 85.1% |
| 5 Feb 2026, 10:19 | 62.5 | 62.5% |
| 9 Jan 2026, 08:50 | 88 | 88% |
| 8 Dec 2025, 10:29 | 86.2 | 86.2% |
| 20 Nov 2025, 15:34 | 83.7 | 83.7% |
| 1 Oct 2025, 09:32 | 90.6 | 90.6% |
| 4 Sep 2025, 14:18 | 87.2 | 87.2% |
| 4 Aug 2025, 16:25 | 93.7 | 93.7% |
| 17 Jul 2025, 15:27 | 77.9 | 77.9% |
| 30 Jun 2025, 10:20 | 88.5 | 88.5% |
| 13 May 2025, 11:22 | 91 | 91% |
| 2 Apr 2025, 14:25 | 89 | 89% |
| 27 Mar 2025, 13:53 | 91.5 | 91.5% |
| 11 Feb 2025, 11:29 | 84 | 84% |
| 28 Jan 2025, 10:20 | 85.3 | 85.3% |
| 2 Dec 2024, 11:31 | 85.1 | 85.1% |
| 18 Nov 2024, 10:38 | 83.1 | 83.1% |
| 16 Oct 2024, 10:07 | 87.5 | 87.5% |
| 18 Sep 2024, 11:40 | 88.9 | 88.9% |
| 19 Aug 2024, 12:25 | 85.3 | 85.3% |
| 15 Jul 2024, 10:44 | 80.3 | 80.3% |
| 19 Jun 2024, 09:22 | 82 | 82% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.43 mg/l
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 9.43 | 9.43 mg/l |
| 7 Apr 2026, 09:17 | 10.2 | 10.2 mg/l |
| 12 Mar 2026, 11:35 | 9.41 | 9.41 mg/l |
| 5 Feb 2026, 10:19 | 7.16 | 7.16 mg/l |
| 9 Jan 2026, 08:50 | 10.8 | 10.8 mg/l |
| 8 Dec 2025, 10:29 | 9.4 | 9.4 mg/l |
| 20 Nov 2025, 15:34 | 9.61 | 9.61 mg/l |
| 1 Oct 2025, 09:32 | 9.7 | 9.7 mg/l |
| 4 Sep 2025, 14:18 | 8.79 | 8.79 mg/l |
| 4 Aug 2025, 16:25 | 9.4 | 9.4 mg/l |
| 17 Jul 2025, 15:27 | 7.51 | 7.51 mg/l |
| 30 Jun 2025, 10:20 | 8.94 | 8.94 mg/l |
| 13 May 2025, 11:22 | 9.4 | 9.4 mg/l |
| 2 Apr 2025, 14:25 | 9.53 | 9.53 mg/l |
| 27 Mar 2025, 13:53 | 10 | 10 mg/l |
| 11 Feb 2025, 11:29 | 9.84 | 9.84 mg/l |
| 28 Jan 2025, 10:20 | 10.1 | 10.1 mg/l |
| 2 Dec 2024, 11:31 | 9.41 | 9.41 mg/l |
| 18 Nov 2024, 10:38 | 9.08 | 9.08 mg/l |
| 16 Oct 2024, 10:07 | 8.88 | 8.88 mg/l |
| 18 Sep 2024, 11:40 | 9.18 | 9.18 mg/l |
| 19 Aug 2024, 12:25 | 8.79 | 8.79 mg/l |
| 15 Jul 2024, 10:44 | 8.27 | 8.27 mg/l |
| 19 Jun 2024, 09:22 | 8.68 | 8.68 mg/l |
Water temperature
code 0076 · °C
14 °C
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 14 | 14 °C |
| 7 Apr 2026, 09:17 | 10.4 | 10.4 °C |
| 12 Mar 2026, 11:35 | 10.8 | 10.8 °C |
| 5 Feb 2026, 10:19 | 9.3 | 9.3 °C |
| 9 Jan 2026, 08:50 | 6.5 | 6.5 °C |
| 8 Dec 2025, 10:29 | 11.4 | 11.4 °C |
| 20 Nov 2025, 15:34 | 9.2 | 9.2 °C |
| 1 Oct 2025, 09:32 | 12.2 | 12.2 °C |
| 4 Sep 2025, 14:18 | 14.9 | 14.9 °C |
| 4 Aug 2025, 16:25 | 15.1 | 15.1 °C |
| 17 Jul 2025, 15:27 | 17 | 17 °C |
| 30 Jun 2025, 10:20 | 14.8 | 14.8 °C |
| 13 May 2025, 11:22 | 13.8 | 13.8 °C |
| 2 Apr 2025, 14:25 | 12.2 | 12.2 °C |
| 27 Mar 2025, 13:53 | 11.2 | 11.2 °C |
| 11 Feb 2025, 11:29 | 8.4 | 8.4 °C |
| 28 Jan 2025, 10:20 | 7.8 | 7.8 °C |
| 2 Dec 2024, 11:31 | 10.8 | 10.8 °C |
| 18 Nov 2024, 10:38 | 11.3 | 11.3 °C |
| 16 Oct 2024, 10:07 | 14.6 | 14.6 °C |
| 18 Sep 2024, 11:40 | 13.8 | 13.8 °C |
| 19 Aug 2024, 12:25 | 13.9 | 13.9 °C |
| 15 Jul 2024, 10:44 | 13.9 | 13.9 °C |
| 19 Jun 2024, 09:22 | 12.7 | 12.7 °C |
pH
code 0061
7.78
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 7.78 | 7.78 |
| 7 Apr 2026, 09:17 | 7.56 | 7.56 |
| 12 Mar 2026, 11:35 | 7.59 | 7.59 |
| 5 Feb 2026, 10:19 | 7.66 | 7.66 |
| 9 Jan 2026, 08:50 | 7.45 | 7.45 |
| 8 Dec 2025, 10:29 | 7.55 | 7.55 |
| 20 Nov 2025, 15:34 | 7.69 | 7.69 |
| 1 Oct 2025, 09:32 | 7.94 | 7.94 |
| 4 Sep 2025, 14:18 | 7.66 | 7.66 |
| 4 Aug 2025, 16:25 | 7.84 | 7.84 |
| 17 Jul 2025, 15:27 | 7.53 | 7.53 |
| 30 Jun 2025, 10:20 | 7.84 | 7.84 |
| 13 May 2025, 11:22 | 7.7 | 7.7 |
| 2 Apr 2025, 14:25 | 7.55 | 7.55 |
| 27 Mar 2025, 13:53 | 7.72 | 7.72 |
| 11 Feb 2025, 11:29 | 7.4 | 7.4 |
| 28 Jan 2025, 10:20 | 7.45 | 7.45 |
| 2 Dec 2024, 11:31 | 7.46 | 7.46 |
| 18 Nov 2024, 10:38 | 7.73 | 7.73 |
| 16 Oct 2024, 10:07 | 7.38 | 7.38 |
| 18 Sep 2024, 11:40 | 7.64 | 7.64 |
| 19 Aug 2024, 12:25 | 7.59 | 7.59 |
| 15 Jul 2024, 10:44 | 7.7 | 7.7 |
| 19 Jun 2024, 09:22 | 7.66 | 7.66 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.062 mg/l
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 0.062 | 0.062 mg/l |
| 7 Apr 2026, 09:17 | 0.11 | 0.11 mg/l |
| 12 Mar 2026, 11:35 | 0.25 | 0.25 mg/l |
| 5 Feb 2026, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2026, 08:50 | 0.33 | 0.33 mg/l |
| 8 Dec 2025, 10:29 | 0.14 | 0.14 mg/l |
| 20 Nov 2025, 15:34 | 0.19 | 0.19 mg/l |
| 1 Oct 2025, 09:32 | 0.06 | 0.06 mg/l |
| 4 Sep 2025, 14:18 | 0.056 | 0.056 mg/l |
| 4 Aug 2025, 16:25 | 0.049 | 0.049 mg/l |
| 17 Jul 2025, 15:27 | 0.25 | 0.25 mg/l |
| 30 Jun 2025, 10:20 | 0.068 | 0.068 mg/l |
| 13 May 2025, 11:22 | 0.085 | 0.085 mg/l |
| 2 Apr 2025, 14:25 | 0.13 | 0.13 mg/l |
| 27 Mar 2025, 13:53 | 0.098 | 0.098 mg/l |
| 11 Feb 2025, 11:29 | 0.23 | 0.23 mg/l |
| 28 Jan 2025, 10:20 | 0.31 | 0.31 mg/l |
| 2 Dec 2024, 11:31 | 0.16 | 0.16 mg/l |
| 18 Nov 2024, 10:38 | 0.15 | 0.15 mg/l |
| 16 Oct 2024, 10:07 | 0.34 | 0.34 mg/l |
| 18 Sep 2024, 11:40 | 0.12 | 0.12 mg/l |
| 19 Aug 2024, 12:25 | 0.084 | 0.084 mg/l |
| 15 Jul 2024, 10:44 | 0.14 | 0.14 mg/l |
| 19 Jun 2024, 09:22 | 0.12 | 0.12 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.456 mg/l
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 0.456 | 0.456 mg/l |
| 7 Apr 2026, 09:17 | 0.989 | 0.989 mg/l |
| 12 Mar 2026, 11:35 | 1.46 | 1.46 mg/l |
| 5 Feb 2026, 10:19 | 0.823 | 0.823 mg/l |
| 9 Jan 2026, 08:50 | 1.39 | 1.39 mg/l |
| 8 Dec 2025, 10:29 | 1.49 | 1.49 mg/l |
| 20 Nov 2025, 15:34 | 0.802 | 0.802 mg/l |
| 1 Oct 2025, 09:32 | 0.296 | 0.296 mg/l |
| 4 Sep 2025, 14:18 | 0.356 | 0.356 mg/l |
| 4 Aug 2025, 16:25 | 0.266 | 0.266 mg/l |
| 17 Jul 2025, 15:27 | 0.78 | 0.78 mg/l |
| 30 Jun 2025, 10:20 | 0.275 | 0.275 mg/l |
| 13 May 2025, 11:22 | 0.582 | 0.582 mg/l |
| 2 Apr 2025, 14:25 | 0.959 | 0.959 mg/l |
| 27 Mar 2025, 13:53 | 0.993 | 0.993 mg/l |
| 11 Feb 2025, 11:29 | 1.99 | 1.99 mg/l |
| 28 Jan 2025, 10:20 | 2.24 | 2.24 mg/l |
| 2 Dec 2024, 11:31 | 2.08 | 2.08 mg/l |
| 18 Nov 2024, 10:38 | 1.08 | 1.08 mg/l |
| 16 Oct 2024, 10:07 | 0.846 | 0.846 mg/l |
| 18 Sep 2024, 11:40 | 0.492 | 0.492 mg/l |
| 19 Aug 2024, 12:25 | 0.393 | 0.393 mg/l |
| 15 Jul 2024, 10:44 | 0.828 | 0.828 mg/l |
| 19 Jun 2024, 09:22 | 0.893 | 0.893 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.011 mg/l
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 0.011 | 0.011 mg/l |
| 7 Apr 2026, 09:17 | 0.035 | 0.035 mg/l |
| 12 Mar 2026, 11:35 | 0.035 | 0.035 mg/l |
| 5 Feb 2026, 10:19 | 0.21 | 0.21 mg/l |
| 9 Jan 2026, 08:50 | 0.075 | 0.075 mg/l |
| 8 Dec 2025, 10:29 | 0.05 | 0.05 mg/l |
| 20 Nov 2025, 15:34 | 0.018 | 0.018 mg/l |
| 1 Oct 2025, 09:32 | 0.011 | 0.011 mg/l |
| 4 Sep 2025, 14:18 | 0.026 | 0.026 mg/l |
| 4 Aug 2025, 16:25 | 0.014 | 0.014 mg/l |
| 17 Jul 2025, 15:27 | 0.066 | 0.066 mg/l |
| 30 Jun 2025, 10:20 | 0.018 | 0.018 mg/l |
| 13 May 2025, 11:22 | 0.012 | 0.012 mg/l |
| 2 Apr 2025, 14:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Mar 2025, 13:53 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Feb 2025, 11:29 | 0.042 | 0.042 mg/l |
| 28 Jan 2025, 10:20 | 0.21 | 0.21 mg/l |
| 2 Dec 2024, 11:31 | 0.052 | 0.052 mg/l |
| 18 Nov 2024, 10:38 | 0.017 | 0.017 mg/l |
| 16 Oct 2024, 10:07 | 0.037 | 0.037 mg/l |
| 18 Sep 2024, 11:40 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Aug 2024, 12:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 15 Jul 2024, 10:44 | 0.022 | 0.022 mg/l |
| 19 Jun 2024, 09:22 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
828 µS/cm
Sampled 29 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 May 2026, 10:55 | 828 | 828 µS/cm |
| 7 Apr 2026, 09:17 | 806 | 806 µS/cm |
| 12 Mar 2026, 11:35 | 777 | 777 µS/cm |
| 5 Feb 2026, 10:19 | 649 | 649 µS/cm |
| 9 Jan 2026, 08:50 | 1053 | 1053 µS/cm |
| 8 Dec 2025, 10:29 | 758 | 758 µS/cm |
| 20 Nov 2025, 15:34 | 836 | 836 µS/cm |
| 1 Oct 2025, 09:32 | 851 | 851 µS/cm |
| 4 Sep 2025, 14:18 | 835 | 835 µS/cm |
| 4 Aug 2025, 16:25 | 861 | 861 µS/cm |
| 17 Jul 2025, 15:27 | 755 | 755 µS/cm |
| 30 Jun 2025, 10:20 | 1057 | 1057 µS/cm |
| 13 May 2025, 11:22 | 844 | 844 µS/cm |
| 2 Apr 2025, 14:25 | 828 | 828 µS/cm |
| 27 Mar 2025, 13:53 | 816 | 816 µS/cm |
| 11 Feb 2025, 11:29 | 801 | 801 µS/cm |
| 28 Jan 2025, 10:20 | 527 | 527 µS/cm |
| 2 Dec 2024, 11:31 | 753 | 753 µS/cm |
| 18 Nov 2024, 10:38 | 818 | 818 µS/cm |
| 16 Oct 2024, 10:07 | 367 | 367 µS/cm |
| 18 Sep 2024, 11:40 | 857 | 857 µS/cm |
| 19 Aug 2024, 12:25 | 857 | 857 µS/cm |
| 15 Jul 2024, 10:44 | 715 | 715 µS/cm |
| 19 Jun 2024, 09:22 | 970 | 970 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 | 91.7% 29 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 9.43 mg/l 29 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 14 °C 29 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 7.78 29 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | 0.062 mg/l 29 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 0.456 mg/l 29 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.011 mg/l 29 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 828 µS/cm 29 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 320 mg/l 29 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | 0.00092 mg/l 29 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Jun 2024 – May 2026 | below 1 mg/l 29 May 2026 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | below 0.004 mg/l 29 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 0.46 mg/l 29 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.