Petherton Stream at Motorway Bridge
EA name: PETHERTON STREAM AT MOTORWAY BRIDGE
Environment Agency sampling point SW-E2241100 · 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
- 27 May 2026, 14:084 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
- 29 since 21 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 329855, 132845As published, to the nearest 1 m. Open in a map
- River, by its own name
- Petherton Stream
- River, by the map
- Not placedTwo watercourses within reach (13 m and 18 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
2 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.8%
Sampled 27 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 89.8 | 89.8% |
| 1 May 2026, 13:03 | 93.1 | 93.1% |
| 15 Apr 2026, 10:08 | 96 | 96% |
| 26 Mar 2026, 14:19 | 101.4 | 101.4% |
| 4 Mar 2026, 10:12 | 102.8 | 102.8% |
| 24 Feb 2026, 12:32 | 100.8 | 100.8% |
| 2 Feb 2026, 10:09 | 99.4 | 99.4% |
| 28 Jan 2026, 10:04 | 99.1 | 99.1% |
| 8 Jan 2026, 09:14 | 98.3 | 98.3% |
| 15 Dec 2025, 09:32 | 97.3 | 97.3% |
| 3 Dec 2025, 09:33 | 101.7 | 101.7% |
| 18 Nov 2025, 14:20 | 96.4 | 96.4% |
| 12 Nov 2025, 09:06 | 87.8 | 87.8% |
| 14 Oct 2025, 13:55 | 90 | 90% |
| 8 Sep 2025, 09:18 | 93.7 | 93.7% |
| 25 Jun 2025, 14:59 | 88.6 | 88.6% |
| 29 May 2025, 16:59 | 89.3 | 89.3% |
| 24 Apr 2025, 10:23 | 96.7 | 96.7% |
| 5 Mar 2025, 14:03 | 100.2 | 100.2% |
| 10 Feb 2025, 11:48 | 98.4 | 98.4% |
| 22 Jan 2025, 10:47 | 98.1 | 98.1% |
| 6 Dec 2024, 09:43 | 98.6 | 98.6% |
| 27 Nov 2024, 13:57 | 95 | 95% |
| 29 Oct 2024, 11:28 | 98.2 | 98.2% |
| 20 Aug 2024, 13:33 | 94 | 94% |
| 17 Jul 2024, 16:41 | 96.6 | 96.6% |
| 21 Jun 2024, 12:19 | 96.1 | 96.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.16 mg/l
Sampled 27 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 8.16 | 8.16 mg/l |
| 1 May 2026, 13:03 | 9.9 | 9.9 mg/l |
| 15 Apr 2026, 10:08 | 10.5 | 10.5 mg/l |
| 26 Mar 2026, 14:19 | 11.5 | 11.5 mg/l |
| 4 Mar 2026, 10:12 | 12 | 12 mg/l |
| 24 Feb 2026, 12:32 | 11 | 11 mg/l |
| 2 Feb 2026, 10:09 | 11.6 | 11.6 mg/l |
| 28 Jan 2026, 10:04 | 12 | 12 mg/l |
| 8 Jan 2026, 09:14 | 12.1 | 12.1 mg/l |
| 15 Dec 2025, 09:32 | 11 | 11 mg/l |
| 3 Dec 2025, 09:33 | 12.9 | 12.9 mg/l |
| 18 Nov 2025, 14:20 | 11.5 | 11.5 mg/l |
| 12 Nov 2025, 09:06 | 9.23 | 9.23 mg/l |
| 14 Oct 2025, 13:55 | 9.48 | 9.48 mg/l |
| 8 Sep 2025, 09:18 | 9.61 | 9.61 mg/l |
| 25 Jun 2025, 14:59 | 8.33 | 8.33 mg/l |
| 29 May 2025, 16:59 | 8.63 | 8.63 mg/l |
| 24 Apr 2025, 10:23 | 10.7 | 10.7 mg/l |
| 5 Mar 2025, 14:03 | 11.6 | 11.6 mg/l |
| 10 Feb 2025, 11:48 | 12.1 | 12.1 mg/l |
| 22 Jan 2025, 10:47 | 12 | 12 mg/l |
| 6 Dec 2024, 09:43 | 11.5 | 11.5 mg/l |
| 27 Nov 2024, 13:57 | 10.9 | 10.9 mg/l |
| 29 Oct 2024, 11:28 | 10.4 | 10.4 mg/l |
| 20 Aug 2024, 13:33 | 9.1 | 9.1 mg/l |
| 17 Jul 2024, 16:41 | 9.37 | 9.37 mg/l |
| 21 Jun 2024, 12:19 | 9.62 | 9.62 mg/l |
Water temperature
code 0076 · °C
19.9 °C
Sampled 27 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 19.9 | 19.9 °C |
| 1 May 2026, 13:03 | 12.5 | 12.5 °C |
| 15 Apr 2026, 10:08 | 11.1 | 11.1 °C |
| 26 Mar 2026, 14:19 | 9.7 | 9.7 °C |
| 4 Mar 2026, 10:12 | 8.5 | 8.5 °C |
| 24 Feb 2026, 12:32 | 11.2 | 11.2 °C |
| 2 Feb 2026, 10:09 | 8.6 | 8.6 °C |
| 28 Jan 2026, 10:04 | 7.2 | 7.2 °C |
| 8 Jan 2026, 09:14 | 6.4 | 6.4 °C |
| 15 Dec 2025, 09:32 | 10 | 10 °C |
| 3 Dec 2025, 09:33 | 5.3 | 5.3 °C |
| 18 Nov 2025, 14:20 | 7.8 | 7.8 °C |
| 12 Nov 2025, 09:06 | 13 | 13 °C |
| 14 Oct 2025, 13:55 | 12.9 | 12.9 °C |
| 8 Sep 2025, 09:18 | 14.1 | 14.1 °C |
| 25 Jun 2025, 14:59 | 18.2 | 18.2 °C |
| 29 May 2025, 16:59 | 16.9 | 16.9 °C |
| 24 Apr 2025, 10:23 | 10.7 | 10.7 °C |
| 5 Mar 2025, 14:03 | 9 | 9 °C |
| 10 Feb 2025, 11:48 | 6.5 | 6.5 °C |
| 22 Jan 2025, 10:47 | 6.7 | 6.7 °C |
| 6 Dec 2024, 09:43 | 8.5 | 8.5 °C |
| 27 Nov 2024, 13:57 | 9.3 | 9.3 °C |
| 29 Oct 2024, 11:28 | 12.6 | 12.6 °C |
| 20 Aug 2024, 13:33 | 16.8 | 16.8 °C |
| 17 Jul 2024, 16:41 | 16.7 | 16.7 °C |
| 21 Jun 2024, 12:19 | 15.2 | 15.2 °C |
pH
code 0061
7.88
Sampled 27 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 7.88 | 7.88 |
| 1 May 2026, 13:03 | 8.03 | 8.03 |
| 15 Apr 2026, 10:08 | 8.06 | 8.06 |
| 26 Mar 2026, 14:19 | 8.01 | 8.01 |
| 4 Mar 2026, 10:12 | 7.69 | 7.69 |
| 24 Feb 2026, 12:32 | 8.26 | 8.26 |
| 2 Feb 2026, 10:09 | 8.1 | 8.1 |
| 28 Jan 2026, 10:04 | 7.66 | 7.66 |
| 8 Jan 2026, 09:14 | 8.01 | 8.01 |
| 15 Dec 2025, 09:32 | 8.1 | 8.1 |
| 3 Dec 2025, 09:33 | 7.71 | 7.71 |
| 18 Nov 2025, 14:20 | 7.95 | 7.95 |
| 12 Nov 2025, 09:06 | 7.49 | 7.49 |
| 14 Oct 2025, 13:55 | 7.92 | 7.92 |
| 8 Sep 2025, 09:18 | 7.81 | 7.81 |
| 25 Jun 2025, 14:59 | 7.93 | 7.93 |
| 29 May 2025, 16:59 | 7.93 | 7.93 |
| 24 Apr 2025, 10:23 | 8.14 | 8.14 |
| 5 Mar 2025, 14:03 | 8.1 | 8.1 |
| 10 Feb 2025, 11:48 | 7.76 | 7.76 |
| 22 Jan 2025, 10:47 | 8.03 | 8.03 |
| 6 Dec 2024, 09:43 | 7.91 | 7.91 |
| 27 Nov 2024, 13:57 | 7.76 | 7.76 |
| 29 Oct 2024, 11:28 | 7.87 | 7.87 |
| 20 Aug 2024, 13:33 | 8.09 | 8.09 |
| 17 Jul 2024, 16:41 | 7.95 | 7.95 |
| 21 Jun 2024, 12:19 | 8.1 | 8.1 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.056 mg/l
Sampled 27 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 0.056 | 0.056 mg/l |
| 1 May 2026, 13:03 | 0.04 | 0.04 mg/l |
| 15 Apr 2026, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Mar 2026, 14:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 10:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Feb 2026, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 10:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jan 2026, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jan 2026, 09:14 | 0.038 | 0.038 mg/l |
| 15 Dec 2025, 09:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2025, 09:33 | 0.045 | 0.045 mg/l |
| 18 Nov 2025, 14:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 09:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 13:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Sep 2025, 09:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2025, 14:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2025, 16:59 | 0.051 | 0.051 mg/l |
| 24 Apr 2025, 10:23 | 0.06 | 0.06 mg/l |
| 5 Mar 2025, 14:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 11:48 | 0.046 | 0.046 mg/l |
| 22 Jan 2025, 10:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Nov 2024, 13:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Oct 2024, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Aug 2024, 13:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 16:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jun 2024, 12:19 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.97 mg/l
Sampled 27 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 2.97 | 2.97 mg/l |
| 1 May 2026, 13:03 | 3.78 | 3.78 mg/l |
| 15 Apr 2026, 10:08 | 4.49 | 4.49 mg/l |
| 26 Mar 2026, 14:19 | 5.39 | 5.39 mg/l |
| 4 Mar 2026, 10:12 | 6.2 | 6.2 mg/l |
| 24 Feb 2026, 12:32 | 6.4 | 6.4 mg/l |
| 2 Feb 2026, 10:09 | 7 | 7 mg/l |
| 28 Jan 2026, 10:04 | 6.9 | 6.9 mg/l |
| 8 Jan 2026, 09:14 | 6.09 | 6.09 mg/l |
| 15 Dec 2025, 09:32 | 5.49 | 5.49 mg/l |
| 3 Dec 2025, 09:33 | 3.59 | 3.59 mg/l |
| 18 Nov 2025, 14:20 | 2.79 | 2.79 mg/l |
| 12 Nov 2025, 09:06 | 1.4 | 1.4 mg/l |
| 14 Oct 2025, 13:55 | 1.5 | 1.5 mg/l |
| 8 Sep 2025, 09:18 | 1.2 | 1.2 mg/l |
| 25 Jun 2025, 14:59 | 1.99 | 1.99 mg/l |
| 29 May 2025, 16:59 | 2.47 | 2.47 mg/l |
| 24 Apr 2025, 10:23 | 3.49 | 3.49 mg/l |
| 5 Mar 2025, 14:03 | 5.89 | 5.89 mg/l |
| 10 Feb 2025, 11:48 | 5.39 | 5.39 mg/l |
| 22 Jan 2025, 10:47 | 5.79 | 5.79 mg/l |
| 27 Nov 2024, 13:57 | 5.7 | 5.7 mg/l |
| 29 Oct 2024, 11:28 | 5.4 | 5.4 mg/l |
| 20 Aug 2024, 13:33 | 2.39 | 2.39 mg/l |
| 17 Jul 2024, 16:41 | 3.29 | 3.29 mg/l |
| 21 Jun 2024, 12:19 | 3.79 | 3.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.11 mg/l
Sampled 27 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 0.11 | 0.11 mg/l |
| 1 May 2026, 13:03 | 0.067 | 0.067 mg/l |
| 15 Apr 2026, 10:08 | 0.055 | 0.055 mg/l |
| 26 Mar 2026, 14:19 | 0.052 | 0.052 mg/l |
| 4 Mar 2026, 10:12 | 0.049 | 0.049 mg/l |
| 24 Feb 2026, 12:32 | 0.051 | 0.051 mg/l |
| 2 Feb 2026, 10:09 | 0.054 | 0.054 mg/l |
| 28 Jan 2026, 10:04 | 0.058 | 0.058 mg/l |
| 8 Jan 2026, 09:14 | 0.042 | 0.042 mg/l |
| 15 Dec 2025, 09:32 | 0.05 | 0.05 mg/l |
| 3 Dec 2025, 09:33 | 0.042 | 0.042 mg/l |
| 18 Nov 2025, 14:20 | 0.042 | 0.042 mg/l |
| 12 Nov 2025, 09:06 | 0.11 | 0.11 mg/l |
| 14 Oct 2025, 13:55 | 0.089 | 0.089 mg/l |
| 8 Sep 2025, 09:18 | 0.11 | 0.11 mg/l |
| 25 Jun 2025, 14:59 | 0.1 | 0.1 mg/l |
| 29 May 2025, 16:59 | 0.091 | 0.091 mg/l |
| 24 Apr 2025, 10:23 | 0.052 | 0.052 mg/l |
| 5 Mar 2025, 14:03 | 0.042 | 0.042 mg/l |
| 10 Feb 2025, 11:48 | 0.048 | 0.048 mg/l |
| 22 Jan 2025, 10:47 | 0.046 | 0.046 mg/l |
| 27 Nov 2024, 13:57 | 0.055 | 0.055 mg/l |
| 29 Oct 2024, 11:28 | 0.043 | 0.043 mg/l |
| 20 Aug 2024, 13:33 | 0.085 | 0.085 mg/l |
| 17 Jul 2024, 16:41 | 0.067 | 0.067 mg/l |
| 21 Jun 2024, 12:19 | 0.062 | 0.062 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
328 µS/cm
Sampled 27 May 2026, 4 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 May 2026, 14:08 | 328 | 328 µS/cm |
| 1 May 2026, 13:03 | 303 | 303 µS/cm |
| 15 Apr 2026, 10:08 | 295 | 295 µS/cm |
| 26 Mar 2026, 14:19 | 279 | 279 µS/cm |
| 4 Mar 2026, 10:12 | 275 | 275 µS/cm |
| 24 Feb 2026, 12:32 | 379 | 379 µS/cm |
| 2 Feb 2026, 10:09 | 258 | 258 µS/cm |
| 28 Jan 2026, 10:04 | 246 | 246 µS/cm |
| 8 Jan 2026, 09:14 | 283 | 283 µS/cm |
| 15 Dec 2025, 09:32 | 264 | 264 µS/cm |
| 3 Dec 2025, 09:33 | 302 | 302 µS/cm |
| 18 Nov 2025, 14:20 | 316 | 316 µS/cm |
| 12 Nov 2025, 09:06 | 270 | 270 µS/cm |
| 14 Oct 2025, 13:55 | 355 | 355 µS/cm |
| 8 Sep 2025, 09:18 | 387 | 387 µS/cm |
| 25 Jun 2025, 14:59 | 333 | 333 µS/cm |
| 29 May 2025, 16:59 | 319 | 319 µS/cm |
| 24 Apr 2025, 10:23 | 296 | 296 µS/cm |
| 5 Mar 2025, 14:03 | 269 | 269 µS/cm |
| 10 Feb 2025, 11:48 | 265 | 265 µS/cm |
| 22 Jan 2025, 10:47 | 278 | 278 µS/cm |
| 6 Dec 2024, 09:43 | 267 | 267 µS/cm |
| 27 Nov 2024, 13:57 | 243 | 243 µS/cm |
| 29 Oct 2024, 11:28 | 270 | 270 µS/cm |
| 20 Aug 2024, 13:33 | 361 | 361 µS/cm |
| 17 Jul 2024, 16:41 | 327 | 327 µS/cm |
| 21 Jun 2024, 12:19 | 322 | 322 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 | 27 | Jun 2024 – May 2026 | 89.8% 27 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – May 2026 | 8.16 mg/l 27 May 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – May 2026 | 19.9 °C 27 May 2026 |
| pH 0061 | River water | 27 | Jun 2024 – May 2026 | 7.88 27 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jun 2024 – May 2026 | 0.056 mg/l 27 May 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – May 2026 | 2.97 mg/l 27 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jun 2024 – May 2026 | 0.11 mg/l 27 May 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – May 2026 | 328 µS/cm 27 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jun 2024 – May 2026 | 120 mg/l 27 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jun 2024 – May 2026 | 0.0016 mg/l 27 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 26 | Jun 2024 – May 2026 | below 1 mg/l 27 May 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – May 2026 | 0.035 mg/l 27 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – May 2026 | 3 mg/l 27 May 2026 |
| No flow /No sample 7668 | River water | 2 | Jul 2025 – Aug 2025 | No flow/discharge at sampling point 15 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.