Lestraines River at Polwheveral Bridge
EA name: LESTRAINES RIVER AT POLWHEVERAL BRIDGE (also listed as “LESTRAINES RIVER AT POLWHEVERAL BRIDGE BELOW CONSTANTINE STW”)
Environment Agency sampling point SW-81915129 · 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
- 15 Dec 2025, 12:1710 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
- 23 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 173705, 28447As published, to the nearest 1 m. Open in a map
- River, by its own name
- Lestraines
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 2 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Monitoring (national agency policy) (21 samples)
Environmental monitoring statutory (EU directives) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
104.1%
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 104.1 | 104.1% |
| 2 Dec 2025, 10:10 | 99.8 | 99.8% |
| 18 Nov 2025, 12:11 | 99.9 | 99.9% |
| 4 Nov 2025, 10:06 | 98.7 | 98.7% |
| 7 Mar 2025, 09:30 | 99.6 | 99.6% |
| 17 Feb 2025, 09:06 | 100.3 | 100.3% |
| 23 Jan 2025, 09:36 | 100 | 100% |
| 2 Dec 2024, 09:18 | 102.4 | 102.4% |
| 18 Nov 2024, 09:21 | 100.6 | 100.6% |
| 23 Oct 2024, 11:14 | 101.3 | 101.3% |
| 24 Sep 2024, 09:09 | 94 | 94% |
| 22 Aug 2024, 09:29 | 100.6 | 100.6% |
| 17 Jul 2024, 11:32 | 100 | 100% |
| 24 Jun 2024, 09:25 | 100.8 | 100.8% |
| 13 May 2024, 09:01 | 101 | 101% |
| 15 Apr 2024, 09:15 | 101.2 | 101.2% |
| 18 Mar 2024, 09:06 | 100.9 | 100.9% |
| 19 Feb 2024, 09:05 | 100.5 | 100.5% |
| 16 Jan 2024, 14:11 | 101.9 | 101.9% |
| 19 Dec 2023, 11:42 | 101.4 | 101.4% |
| 4 Dec 2023, 09:18 | 100.9 | 100.9% |
| 20 Nov 2023, 11:50 | 100.6 | 100.6% |
| 16 Oct 2023, 10:08 | 102.7 | 102.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.5 mg/l
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 11.5 | 11.5 mg/l |
| 2 Dec 2025, 10:10 | 11.4 | 11.4 mg/l |
| 18 Nov 2025, 12:11 | 11.2 | 11.2 mg/l |
| 4 Nov 2025, 10:06 | 10.4 | 10.4 mg/l |
| 7 Mar 2025, 09:30 | 11.2 | 11.2 mg/l |
| 17 Feb 2025, 09:06 | 11.7 | 11.7 mg/l |
| 23 Jan 2025, 09:36 | 11.7 | 11.7 mg/l |
| 2 Dec 2024, 09:18 | 11.4 | 11.4 mg/l |
| 18 Nov 2024, 09:21 | 11 | 11 mg/l |
| 23 Oct 2024, 11:14 | 11.1 | 11.1 mg/l |
| 24 Sep 2024, 09:09 | 9.77 | 9.77 mg/l |
| 22 Aug 2024, 09:29 | 10.1 | 10.1 mg/l |
| 17 Jul 2024, 11:32 | 10.3 | 10.3 mg/l |
| 24 Jun 2024, 09:25 | 10.5 | 10.5 mg/l |
| 13 May 2024, 09:01 | 10.7 | 10.7 mg/l |
| 15 Apr 2024, 09:15 | 11.3 | 11.3 mg/l |
| 18 Mar 2024, 09:06 | 11.1 | 11.1 mg/l |
| 19 Feb 2024, 09:05 | 11.2 | 11.2 mg/l |
| 16 Jan 2024, 14:11 | 12.5 | 12.5 mg/l |
| 19 Dec 2023, 11:42 | 11 | 11 mg/l |
| 4 Dec 2023, 09:18 | 11.5 | 11.5 mg/l |
| 20 Nov 2023, 11:50 | 10.8 | 10.8 mg/l |
| 16 Oct 2023, 10:08 | 11.2 | 11.2 mg/l |
Water temperature
code 0076 · °C
10.8 °C
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 10.8 | 10.8 °C |
| 2 Dec 2025, 10:10 | 9.6 | 9.6 °C |
| 18 Nov 2025, 12:11 | 10.1 | 10.1 °C |
| 4 Nov 2025, 10:06 | 13 | 13 °C |
| 7 Mar 2025, 09:30 | 10.1 | 10.1 °C |
| 17 Feb 2025, 09:06 | 8.4 | 8.4 °C |
| 23 Jan 2025, 09:36 | 8.3 | 8.3 °C |
| 2 Dec 2024, 09:18 | 10.4 | 10.4 °C |
| 18 Nov 2024, 09:21 | 11.2 | 11.2 °C |
| 23 Oct 2024, 11:14 | 11.2 | 11.2 °C |
| 24 Sep 2024, 09:09 | 13.5 | 13.5 °C |
| 22 Aug 2024, 09:29 | 15 | 15 °C |
| 17 Jul 2024, 11:32 | 13.9 | 13.9 °C |
| 24 Jun 2024, 09:25 | 13.5 | 13.5 °C |
| 13 May 2024, 09:01 | 12.8 | 12.8 °C |
| 15 Apr 2024, 09:15 | 10.4 | 10.4 °C |
| 18 Mar 2024, 09:06 | 11.2 | 11.2 °C |
| 19 Feb 2024, 09:05 | 10.6 | 10.6 °C |
| 16 Jan 2024, 14:11 | 6.5 | 6.5 °C |
| 19 Dec 2023, 11:42 | 11.6 | 11.6 °C |
| 4 Dec 2023, 09:18 | 9.5 | 9.5 °C |
| 20 Nov 2023, 11:50 | 12 | 12 °C |
| 16 Oct 2023, 10:08 | 11.4 | 11.4 °C |
pH
code 0061
7.14
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 7.14 | 7.14 |
| 2 Dec 2025, 10:10 | 7.32 | 7.32 |
| 18 Nov 2025, 12:11 | 7.42 | 7.42 |
| 4 Nov 2025, 10:06 | 7.53 | 7.53 |
| 7 Mar 2025, 09:30 | 7.24 | 7.24 |
| 17 Feb 2025, 09:06 | 7.41 | 7.41 |
| 23 Jan 2025, 09:36 | 7.46 | 7.46 |
| 2 Dec 2024, 09:18 | 7.39 | 7.39 |
| 18 Nov 2024, 09:21 | 7.31 | 7.31 |
| 23 Oct 2024, 11:14 | 7.31 | 7.31 |
| 24 Sep 2024, 09:09 | 7.42 | 7.42 |
| 22 Aug 2024, 09:29 | 7.97 | 7.97 |
| 17 Jul 2024, 11:32 | 7.39 | 7.39 |
| 24 Jun 2024, 09:25 | 7.71 | 7.71 |
| 13 May 2024, 09:01 | 7.33 | 7.33 |
| 15 Apr 2024, 09:15 | 7.41 | 7.41 |
| 18 Mar 2024, 09:06 | 7.44 | 7.44 |
| 19 Feb 2024, 09:05 | 7.3 | 7.3 |
| 16 Jan 2024, 14:11 | 7.28 | 7.28 |
| 19 Dec 2023, 11:42 | 7.75 | 7.75 |
| 4 Dec 2023, 09:18 | 7.25 | 7.25 |
| 20 Nov 2023, 11:50 | 7.45 | 7.45 |
| 16 Oct 2023, 10:08 | 7.44 | 7.44 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.05 mg/l
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 0.05 | 0.05 mg/l |
| 2 Dec 2025, 10:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2025, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2025, 10:06 | 0.29 | 0.29 mg/l |
| 7 Mar 2025, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Feb 2025, 09:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jan 2025, 09:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2024, 09:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 09:21 | 0.061 | 0.061 mg/l |
| 23 Oct 2024, 11:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Sep 2024, 09:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Aug 2024, 09:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 11:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2024, 09:25 | 0.13 | 0.13 mg/l |
| 13 May 2024, 09:01 | 0.5 | 0.5 mg/l |
| 15 Apr 2024, 09:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 09:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2024, 09:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jan 2024, 14:11 | 0.036 | 0.036 mg/l |
| 19 Dec 2023, 11:42 | 0.075 | 0.075 mg/l |
| 4 Dec 2023, 09:18 | 0.075 | 0.075 mg/l |
| 20 Nov 2023, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2023, 10:08 | 0.044 | 0.044 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.8 mg/l
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 1.8 | 1.8 mg/l |
| 2 Dec 2025, 10:10 | 2.8 | 2.8 mg/l |
| 18 Nov 2025, 12:11 | 2.9 | 2.9 mg/l |
| 4 Nov 2025, 10:06 | 2.98 | 2.98 mg/l |
| 7 Mar 2025, 09:30 | 3 | 3 mg/l |
| 17 Feb 2025, 09:06 | 3.2 | 3.2 mg/l |
| 23 Jan 2025, 09:36 | 3.4 | 3.4 mg/l |
| 2 Dec 2024, 09:18 | 2.9 | 2.9 mg/l |
| 18 Nov 2024, 09:21 | 3.29 | 3.29 mg/l |
| 23 Oct 2024, 11:14 | 2.8 | 2.8 mg/l |
| 24 Sep 2024, 09:09 | 3.39 | 3.39 mg/l |
| 22 Aug 2024, 09:29 | 4.09 | 4.09 mg/l |
| 17 Jul 2024, 11:32 | 3.29 | 3.29 mg/l |
| 24 Jun 2024, 09:25 | 3.78 | 3.78 mg/l |
| 13 May 2024, 09:01 | 3.48 | 3.48 mg/l |
| 15 Apr 2024, 09:15 | 3 | 3 mg/l |
| 18 Mar 2024, 09:06 | 3 | 3 mg/l |
| 19 Feb 2024, 09:05 | 3.2 | 3.2 mg/l |
| 16 Jan 2024, 14:11 | 3 | 3 mg/l |
| 19 Dec 2023, 11:42 | 2.59 | 2.59 mg/l |
| 4 Dec 2023, 09:18 | 2.99 | 2.99 mg/l |
| 20 Nov 2023, 11:50 | 3.2 | 3.2 mg/l |
| 16 Oct 2023, 10:08 | 3.5 | 3.5 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.041 mg/l
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 0.041 | 0.041 mg/l |
| 2 Dec 2025, 10:10 | 0.033 | 0.033 mg/l |
| 18 Nov 2025, 12:11 | 0.035 | 0.035 mg/l |
| 4 Nov 2025, 10:06 | 0.23 | 0.23 mg/l |
| 7 Mar 2025, 09:30 | 0.033 | 0.033 mg/l |
| 17 Feb 2025, 09:06 | 0.028 | 0.028 mg/l |
| 23 Jan 2025, 09:36 | 0.047 | 0.047 mg/l |
| 2 Dec 2024, 09:18 | 0.027 | 0.027 mg/l |
| 18 Nov 2024, 09:21 | 0.12 | 0.12 mg/l |
| 23 Oct 2024, 11:14 | 0.032 | 0.032 mg/l |
| 24 Sep 2024, 09:09 | 0.21 | 0.21 mg/l |
| 22 Aug 2024, 09:29 | 0.32 | 0.32 mg/l |
| 17 Jul 2024, 11:32 | 0.15 | 0.15 mg/l |
| 24 Jun 2024, 09:25 | 0.21 | 0.21 mg/l |
| 13 May 2024, 09:01 | 0.3 | 0.3 mg/l |
| 15 Apr 2024, 09:15 | 0.038 | 0.038 mg/l |
| 18 Mar 2024, 09:06 | 0.03 | 0.03 mg/l |
| 19 Feb 2024, 09:05 | 0.022 | 0.022 mg/l |
| 16 Jan 2024, 14:11 | 0.067 | 0.067 mg/l |
| 19 Dec 2023, 11:42 | 0.051 | 0.051 mg/l |
| 4 Dec 2023, 09:18 | 0.033 | 0.033 mg/l |
| 20 Nov 2023, 11:50 | 0.024 | 0.024 mg/l |
| 16 Oct 2023, 10:08 | 0.082 | 0.082 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
135 µS/cm
Sampled 15 Dec 2025, 10 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Dec 2025, 12:17 | 135 | 135 µS/cm |
| 2 Dec 2025, 10:10 | 170 | 170 µS/cm |
| 18 Nov 2025, 12:11 | 178 | 178 µS/cm |
| 4 Nov 2025, 10:06 | 191 | 191 µS/cm |
| 7 Mar 2025, 09:30 | 174 | 174 µS/cm |
| 17 Feb 2025, 09:06 | 167 | 167 µS/cm |
| 23 Jan 2025, 09:36 | 172 | 172 µS/cm |
| 2 Dec 2024, 09:18 | 166 | 166 µS/cm |
| 18 Nov 2024, 09:21 | 180 | 180 µS/cm |
| 23 Oct 2024, 11:14 | 166 | 166 µS/cm |
| 24 Sep 2024, 09:09 | 194 | 194 µS/cm |
| 22 Aug 2024, 09:29 | 260 | 260 µS/cm |
| 17 Jul 2024, 11:32 | 185 | 185 µS/cm |
| 24 Jun 2024, 09:25 | 233 | 233 µS/cm |
| 13 May 2024, 09:01 | 175 | 175 µS/cm |
| 15 Apr 2024, 09:15 | 168 | 168 µS/cm |
| 18 Mar 2024, 09:06 | 168 | 168 µS/cm |
| 19 Feb 2024, 09:05 | 167 | 167 µS/cm |
| 16 Jan 2024, 14:11 | 178 | 178 µS/cm |
| 19 Dec 2023, 11:42 | 166 | 166 µS/cm |
| 4 Dec 2023, 09:18 | 170 | 170 µS/cm |
| 20 Nov 2023, 11:50 | 174 | 174 µS/cm |
| 16 Oct 2023, 10:08 | 186 | 186 µS/cm |
Everything measured here
17 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 17 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 23 | Oct 2023 – Dec 2025 | 104.1% 15 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Oct 2023 – Dec 2025 | 11.5 mg/l 15 Dec 2025 |
| Temperature of Water 0076 | River water | 23 | Oct 2023 – Dec 2025 | 10.8 °C 15 Dec 2025 |
| pH 0061 | River water | 23 | Oct 2023 – Dec 2025 | 7.14 15 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Oct 2023 – Dec 2025 | 0.05 mg/l 15 Dec 2025 |
| Nitrate as N 0117 | River water | 23 | Oct 2023 – Dec 2025 | 1.8 mg/l 15 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Oct 2023 – Dec 2025 | 0.041 mg/l 15 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 23 | Oct 2023 – Dec 2025 | 135 µS/cm 15 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Oct 2023 – Dec 2025 | 17 mg/l 15 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 23 | Oct 2023 – Dec 2025 | 0.00014 mg/l 15 Dec 2025 |
| BOD : 5 Day ATU 0085 | River water | 17 | Feb 2024 – Dec 2025 | 1.2 mg/l 2 Dec 2025 |
| Calcium, Dissolved 0239 | River water | 2 | Oct 2023 – Jan 2024 | 12 mg/l 16 Jan 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Oct 2023 – Jan 2024 | 3.8 mg/l 16 Jan 2024 |
| Iron, Dissolved 6460 | River water | 2 | Oct 2023 – Jan 2024 | 51 µg/l 16 Jan 2024 |
| Magnesium, Dissolved 0235 | River water | 2 | Oct 2023 – Jan 2024 | 2.6 mg/l 16 Jan 2024 |
| Nitrite as N 0118 | River water | 23 | Oct 2023 – Dec 2025 | below 0.004 mg/l 15 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Oct 2023 – Dec 2025 | 1.8 mg/l 15 Dec 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.