Upstream of Combe St Nicholas sewage treatment works
EA name: US COMBE ST. NICHOLAS STW
Environment Agency sampling point SW-E2033500 · 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
- 24 Aug 2026, 13:4738 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 20 Jun 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 331959, 110870As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- River IslePlaced by position alone (the only river line close by), 5 m from the line.
- Next gauge downstream
- Donyatt On the River Isle · 6.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Environmental monitoring statutory (EU directives) (5 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
105.7%
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 105.7 | 105.7% |
| 8 Jul 2026, 11:13 | 102.3 | 102.3% |
| 22 Jun 2026, 11:39 | 102 | 102% |
| 29 May 2026, 08:25 | 100.8 | 100.8% |
| 7 Apr 2026, 10:55 | 106.7 | 106.7% |
| 4 Mar 2026, 11:27 | 102 | 102% |
| 16 Feb 2026, 15:07 | 100.5 | 100.5% |
| 29 Jan 2026, 10:15 | 82.7 | 82.7% |
| 4 Dec 2025, 12:18 | 97.9 | 97.9% |
| 6 Nov 2025, 09:30 | 96.4 | 96.4% |
| 1 Oct 2025, 12:32 | 104.7 | 104.7% |
| 3 Sep 2025, 12:03 | 100.3 | 100.3% |
| 4 Aug 2025, 10:15 | 98.7 | 98.7% |
| 16 Jul 2025, 12:42 | 104.2 | 104.2% |
| 20 Jun 2025, 14:09 | 106.1 | 106.1% |
| 6 May 2025, 12:09 | 102.7 | 102.7% |
| 3 Apr 2025, 10:32 | 104.2 | 104.2% |
| 20 Mar 2025, 11:30 | 103 | 103% |
| 26 Feb 2025, 12:24 | 100.2 | 100.2% |
| 24 Jan 2025, 09:24 | 101.1 | 101.1% |
| 2 Dec 2024, 12:19 | 100.7 | 100.7% |
| 18 Nov 2024, 09:51 | 100.4 | 100.4% |
| 16 Oct 2024, 09:29 | 97.3 | 97.3% |
| 26 Sep 2024, 13:31 | 101.7 | 101.7% |
| 19 Aug 2024, 14:20 | 103.5 | 103.5% |
| 23 Jul 2024, 09:18 | 99.7 | 99.7% |
| 20 Jun 2024, 09:34 | 99.8 | 99.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.8 mg/l
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 10.8 | 10.8 mg/l |
| 8 Jul 2026, 11:13 | 10.3 | 10.3 mg/l |
| 22 Jun 2026, 11:39 | 10.2 | 10.2 mg/l |
| 29 May 2026, 08:25 | 10.5 | 10.5 mg/l |
| 7 Apr 2026, 10:55 | 11.6 | 11.6 mg/l |
| 4 Mar 2026, 11:27 | 11.3 | 11.3 mg/l |
| 16 Feb 2026, 15:07 | 11.3 | 11.3 mg/l |
| 29 Jan 2026, 10:15 | 9.97 | 9.97 mg/l |
| 4 Dec 2025, 12:18 | 11.2 | 11.2 mg/l |
| 6 Nov 2025, 09:30 | 10.3 | 10.3 mg/l |
| 1 Oct 2025, 12:32 | 11 | 11 mg/l |
| 3 Sep 2025, 12:03 | 10.2 | 10.2 mg/l |
| 4 Aug 2025, 10:15 | 10.1 | 10.1 mg/l |
| 16 Jul 2025, 12:42 | 10.5 | 10.5 mg/l |
| 20 Jun 2025, 14:09 | 10.4 | 10.4 mg/l |
| 6 May 2025, 12:09 | 11.2 | 11.2 mg/l |
| 3 Apr 2025, 10:32 | 11.6 | 11.6 mg/l |
| 20 Mar 2025, 11:30 | 11.2 | 11.2 mg/l |
| 26 Feb 2025, 12:24 | 11.4 | 11.4 mg/l |
| 24 Jan 2025, 09:24 | 11.8 | 11.8 mg/l |
| 2 Dec 2024, 12:19 | 11.2 | 11.2 mg/l |
| 18 Nov 2024, 09:51 | 11.2 | 11.2 mg/l |
| 16 Oct 2024, 09:29 | 10.2 | 10.2 mg/l |
| 26 Sep 2024, 13:31 | 10.7 | 10.7 mg/l |
| 19 Aug 2024, 14:20 | 10.7 | 10.7 mg/l |
| 23 Jul 2024, 09:18 | 10.4 | 10.4 mg/l |
| 20 Jun 2024, 09:34 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
14.4 °C
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 14.4 | 14.4 °C |
| 8 Jul 2026, 11:13 | 14.9 | 14.9 °C |
| 22 Jun 2026, 11:39 | 15.4 | 15.4 °C |
| 29 May 2026, 08:25 | 13.2 | 13.2 °C |
| 7 Apr 2026, 10:55 | 11.4 | 11.4 °C |
| 4 Mar 2026, 11:27 | 10.7 | 10.7 °C |
| 16 Feb 2026, 15:07 | 9.9 | 9.9 °C |
| 29 Jan 2026, 10:15 | 7.2 | 7.2 °C |
| 4 Dec 2025, 12:18 | 9.5 | 9.5 °C |
| 6 Nov 2025, 09:30 | 12.3 | 12.3 °C |
| 1 Oct 2025, 12:32 | 13 | 13 °C |
| 3 Sep 2025, 12:03 | 14.3 | 14.3 °C |
| 4 Aug 2025, 10:15 | 14.3 | 14.3 °C |
| 16 Jul 2025, 12:42 | 14.8 | 14.8 °C |
| 20 Jun 2025, 14:09 | 16.1 | 16.1 °C |
| 6 May 2025, 12:09 | 11.2 | 11.2 °C |
| 3 Apr 2025, 10:32 | 10.6 | 10.6 °C |
| 20 Mar 2025, 11:30 | 11.5 | 11.5 °C |
| 26 Feb 2025, 12:24 | 9.5 | 9.5 °C |
| 24 Jan 2025, 09:24 | 8.7 | 8.7 °C |
| 2 Dec 2024, 12:19 | 10.5 | 10.5 °C |
| 18 Nov 2024, 09:51 | 10.5 | 10.5 °C |
| 16 Oct 2024, 09:29 | 13.2 | 13.2 °C |
| 26 Sep 2024, 13:31 | 12.9 | 12.9 °C |
| 19 Aug 2024, 14:20 | 13.9 | 13.9 °C |
| 23 Jul 2024, 09:18 | 13.4 | 13.4 °C |
| 20 Jun 2024, 09:34 | 12.5 | 12.5 °C |
pH
code 0061
8.1
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 8.1 | 8.1 |
| 8 Jul 2026, 11:13 | 8.23 | 8.23 |
| 22 Jun 2026, 11:39 | 8.1 | 8.1 |
| 29 May 2026, 08:25 | 8.18 | 8.18 |
| 7 Apr 2026, 10:55 | 8.17 | 8.17 |
| 4 Mar 2026, 11:27 | 8.03 | 8.03 |
| 16 Feb 2026, 15:07 | 8 | 8 |
| 29 Jan 2026, 10:15 | 7.99 | 7.99 |
| 4 Dec 2025, 12:18 | 7.95 | 7.95 |
| 6 Nov 2025, 09:30 | 8.03 | 8.03 |
| 1 Oct 2025, 12:32 | 8.26 | 8.26 |
| 3 Sep 2025, 12:03 | 8.07 | 8.07 |
| 4 Aug 2025, 10:15 | 8.05 | 8.05 |
| 16 Jul 2025, 12:42 | 8.14 | 8.14 |
| 20 Jun 2025, 14:09 | 8.14 | 8.14 |
| 6 May 2025, 12:09 | 8.23 | 8.23 |
| 3 Apr 2025, 10:32 | 8.13 | 8.13 |
| 20 Mar 2025, 11:30 | 8.23 | 8.23 |
| 26 Feb 2025, 12:24 | 8.02 | 8.02 |
| 24 Jan 2025, 09:24 | 7.96 | 7.96 |
| 2 Dec 2024, 12:19 | 8.07 | 8.07 |
| 18 Nov 2024, 09:51 | 8.13 | 8.13 |
| 16 Oct 2024, 09:29 | 7.82 | 7.82 |
| 26 Sep 2024, 13:31 | 8.06 | 8.06 |
| 19 Aug 2024, 14:20 | 8.24 | 8.24 |
| 23 Jul 2024, 09:18 | 8.07 | 8.07 |
| 20 Jun 2024, 09:34 | 8.01 | 8.01 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2026, 11:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jun 2026, 11:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2026, 08:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Apr 2026, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Feb 2026, 15:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jan 2026, 10:15 | 0.032 | 0.032 mg/l |
| 4 Dec 2025, 12:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Nov 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Oct 2025, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2025, 12:03 | 0.032 | 0.032 mg/l |
| 4 Aug 2025, 10:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2025, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2025, 14:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 May 2025, 12:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Apr 2025, 10:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Mar 2025, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Feb 2025, 12:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jan 2025, 09:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2024, 12:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2024, 09:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Sep 2024, 13:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 14:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jul 2024, 09:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2024, 09:34 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.89 mg/l
Sampled 24 Aug 2026, 38 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 5.89 | 5.89 mg/l |
| 8 Jul 2026, 11:13 | 6.08 | 6.08 mg/l |
| 22 Jun 2026, 11:39 | 6.28 | 6.28 mg/l |
| 29 May 2026, 08:25 | 5.69 | 5.69 mg/l |
| 7 Apr 2026, 10:55 | 5.8 | 5.8 mg/l |
| 4 Mar 2026, 11:27 | 5.8 | 5.8 mg/l |
| 16 Feb 2026, 15:07 | 5.6 | 5.6 mg/l |
| 29 Jan 2026, 10:15 | 8.1 | 8.1 mg/l |
| 4 Dec 2025, 12:18 | 4.8 | 4.8 mg/l |
| 6 Nov 2025, 09:30 | 5.49 | 5.49 mg/l |
| 1 Oct 2025, 12:32 | 6.09 | 6.09 mg/l |
| 3 Sep 2025, 12:03 | 5.49 | 5.49 mg/l |
| 4 Aug 2025, 10:15 | 5.99 | 5.99 mg/l |
| 16 Jul 2025, 12:42 | 5.89 | 5.89 mg/l |
| 20 Jun 2025, 14:09 | 5.99 | 5.99 mg/l |
| 6 May 2025, 12:09 | 5.99 | 5.99 mg/l |
| 3 Apr 2025, 10:32 | 6.1 | 6.1 mg/l |
| 20 Mar 2025, 11:30 | 6.1 | 6.1 mg/l |
| 26 Feb 2025, 12:24 | 4.7 | 4.7 mg/l |
| 24 Jan 2025, 09:24 | 4.89 | 4.89 mg/l |
| 18 Nov 2024, 09:51 | 5.89 | 5.89 mg/l |
| 16 Oct 2024, 09:29 | 4.19 | 4.19 mg/l |
| 26 Sep 2024, 13:31 | 5.29 | 5.29 mg/l |
| 19 Aug 2024, 14:20 | 5.79 | 5.79 mg/l |
| 23 Jul 2024, 09:18 | 6.09 | 6.09 mg/l |
| 20 Jun 2024, 09:34 | 5.89 | 5.89 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.091 mg/l
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 0.091 | 0.091 mg/l |
| 8 Jul 2026, 11:13 | 0.079 | 0.079 mg/l |
| 22 Jun 2026, 11:39 | 0.06 | 0.06 mg/l |
| 29 May 2026, 08:25 | 0.089 | 0.089 mg/l |
| 7 Apr 2026, 10:55 | 0.086 | 0.086 mg/l |
| 4 Mar 2026, 11:27 | 0.095 | 0.095 mg/l |
| 16 Feb 2026, 15:07 | 0.12 | 0.12 mg/l |
| 29 Jan 2026, 10:15 | 0.13 | 0.13 mg/l |
| 4 Dec 2025, 12:18 | 0.096 | 0.096 mg/l |
| 6 Nov 2025, 09:30 | 0.084 | 0.084 mg/l |
| 1 Oct 2025, 12:32 | 0.09 | 0.09 mg/l |
| 3 Sep 2025, 12:03 | 0.09 | 0.09 mg/l |
| 4 Aug 2025, 10:15 | 0.074 | 0.074 mg/l |
| 16 Jul 2025, 12:42 | 0.084 | 0.084 mg/l |
| 20 Jun 2025, 14:09 | 0.088 | 0.088 mg/l |
| 6 May 2025, 12:09 | 0.088 | 0.088 mg/l |
| 3 Apr 2025, 10:32 | 0.064 | 0.064 mg/l |
| 20 Mar 2025, 11:30 | 0.063 | 0.063 mg/l |
| 26 Feb 2025, 12:24 | 0.11 | 0.11 mg/l |
| 24 Jan 2025, 09:24 | 0.12 | 0.12 mg/l |
| 2 Dec 2024, 12:19 | 0.089 | 0.089 mg/l |
| 18 Nov 2024, 09:51 | 0.097 | 0.097 mg/l |
| 16 Oct 2024, 09:29 | 0.089 | 0.089 mg/l |
| 26 Sep 2024, 13:31 | 0.095 | 0.095 mg/l |
| 19 Aug 2024, 14:20 | 0.087 | 0.087 mg/l |
| 23 Jul 2024, 09:18 | 0.088 | 0.088 mg/l |
| 20 Jun 2024, 09:34 | 0.088 | 0.088 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
585 µS/cm
Sampled 24 Aug 2026, 38 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Aug 2026, 13:47 | 585 | 585 µS/cm |
| 8 Jul 2026, 11:13 | 584 | 584 µS/cm |
| 22 Jun 2026, 11:39 | 587 | 587 µS/cm |
| 29 May 2026, 08:25 | 580 | 580 µS/cm |
| 7 Apr 2026, 10:55 | 574 | 574 µS/cm |
| 4 Mar 2026, 11:27 | 568 | 568 µS/cm |
| 16 Feb 2026, 15:07 | 552 | 552 µS/cm |
| 29 Jan 2026, 10:15 | 444 | 444 µS/cm |
| 4 Dec 2025, 12:18 | 504 | 504 µS/cm |
| 6 Nov 2025, 09:30 | 572 | 572 µS/cm |
| 1 Oct 2025, 12:32 | 585 | 585 µS/cm |
| 3 Sep 2025, 12:03 | 568 | 568 µS/cm |
| 4 Aug 2025, 10:15 | 578 | 578 µS/cm |
| 16 Jul 2025, 12:42 | 582 | 582 µS/cm |
| 20 Jun 2025, 14:09 | 588 | 588 µS/cm |
| 6 May 2025, 12:09 | 583 | 583 µS/cm |
| 3 Apr 2025, 10:32 | 579 | 579 µS/cm |
| 20 Mar 2025, 11:30 | 573 | 573 µS/cm |
| 26 Feb 2025, 12:24 | 458 | 458 µS/cm |
| 24 Jan 2025, 09:24 | 512 | 512 µS/cm |
| 2 Dec 2024, 12:19 | 568 | 568 µS/cm |
| 18 Nov 2024, 09:51 | 581 | 581 µS/cm |
| 16 Oct 2024, 09:29 | 497 | 497 µS/cm |
| 26 Sep 2024, 13:31 | 562 | 562 µS/cm |
| 19 Aug 2024, 14:20 | 581 | 581 µS/cm |
| 23 Jul 2024, 09:18 | 578 | 578 µS/cm |
| 20 Jun 2024, 09:34 | 673 | 673 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 | 27 | Jun 2024 – Aug 2026 | 105.7% 24 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – Aug 2026 | 10.8 mg/l 24 Aug 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – Aug 2026 | 14.4 °C 24 Aug 2026 |
| pH 0061 | River water | 27 | Jun 2024 – Aug 2026 | 8.1 24 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Jun 2024 – Aug 2026 | below 0.03 mg/l 24 Aug 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – Aug 2026 | 5.89 mg/l 24 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Jun 2024 – Aug 2026 | 0.091 mg/l 24 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – Aug 2026 | 585 µS/cm 24 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Jun 2024 – Aug 2026 | 260 mg/l 24 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Jun 2024 – Aug 2026 | below 0.00075 mg/l 24 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | below 1 mg/l 29 May 2026 |
| Nitrite as N 0118 | River water | 27 | Jun 2024 – Aug 2026 | 0.0087 mg/l 24 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – Aug 2026 | 5.9 mg/l 24 Aug 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.