St Austell River at Lansalson Bridge
EA name: ST. AUSTELL RIVER AT LANSALSON BRIDGE
Environment Agency sampling point SW-81810185 · 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
- 3 Aug 2026, 09:5759 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 26 since 25 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 200890, 54780As published, to the nearest 10 m. Open in a map
- River, by its own name
- St Austell
- River, by the map
- Not placedIts name gives St Austell; the only line close by, 6 m away, is White River and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (14 samples)
Environmental monitoring statutory (EU directives) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.8%
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | 96.8 | 96.8% |
| 1 Jul 2026, 11:30 | 97.8 | 97.8% |
| 9 Jun 2026, 11:16 | 102.1 | 102.1% |
| 5 May 2026, 09:58 | 98.2 | 98.2% |
| 13 Apr 2026, 14:56 | 100.7 | 100.7% |
| 2 Mar 2026, 12:09 | 99.6 | 99.6% |
| 5 Feb 2026, 10:55 | 102.8 | 102.8% |
| 7 Jan 2026, 11:53 | 100.6 | 100.6% |
| 3 Dec 2025, 10:56 | 96.2 | 96.2% |
| 14 Nov 2025, 11:55 | 99 | 99% |
| 7 Oct 2025, 14:18 | 94.8 | 94.8% |
| 5 Sep 2025, 10:47 | 100.3 | 100.3% |
| 4 Aug 2025, 10:59 | 98.2 | 98.2% |
| 15 Jul 2025, 11:14 | 99.9 | 99.9% |
| 13 Jun 2025, 10:24 | 99.3 | 99.3% |
| 29 May 2025, 12:08 | 99.5 | 99.5% |
| 7 Apr 2025, 14:25 | 97.6 | 97.6% |
| 18 Mar 2025, 11:24 | 99 | 99% |
| 3 Feb 2025, 12:14 | 100 | 100% |
| 20 Jan 2025, 12:23 | 101.1 | 101.1% |
| 5 Dec 2024, 12:23 | 99 | 99% |
| 20 Nov 2024, 12:48 | 97.8 | 97.8% |
| 16 Oct 2024, 11:15 | 97.3 | 97.3% |
| 17 Sep 2024, 13:15 | 100.5 | 100.5% |
| 18 Jul 2024, 09:46 | 98.9 | 98.9% |
| 25 Jun 2024, 09:57 | 99.5 | 99.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.18 mg/l
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | 9.18 | 9.18 mg/l |
| 1 Jul 2026, 11:30 | 9.12 | 9.12 mg/l |
| 9 Jun 2026, 11:16 | 10.5 | 10.5 mg/l |
| 5 May 2026, 09:58 | 10.2 | 10.2 mg/l |
| 13 Apr 2026, 14:56 | 10.9 | 10.9 mg/l |
| 2 Mar 2026, 12:09 | 11.3 | 11.3 mg/l |
| 5 Feb 2026, 10:55 | 11.9 | 11.9 mg/l |
| 7 Jan 2026, 11:53 | 12.1 | 12.1 mg/l |
| 3 Dec 2025, 10:56 | 11.1 | 11.1 mg/l |
| 14 Nov 2025, 11:55 | 10.4 | 10.4 mg/l |
| 7 Oct 2025, 14:18 | 9.68 | 9.68 mg/l |
| 5 Sep 2025, 10:47 | 9.85 | 9.85 mg/l |
| 4 Aug 2025, 10:59 | 9.16 | 9.16 mg/l |
| 15 Jul 2025, 11:14 | 9.41 | 9.41 mg/l |
| 13 Jun 2025, 10:24 | 9.73 | 9.73 mg/l |
| 29 May 2025, 12:08 | 9.61 | 9.61 mg/l |
| 7 Apr 2025, 14:25 | 10.4 | 10.4 mg/l |
| 18 Mar 2025, 11:24 | 11.6 | 11.6 mg/l |
| 3 Feb 2025, 12:14 | 11.8 | 11.8 mg/l |
| 20 Jan 2025, 12:23 | 12 | 12 mg/l |
| 5 Dec 2024, 12:23 | 10.9 | 10.9 mg/l |
| 20 Nov 2024, 12:48 | 11 | 11 mg/l |
| 16 Oct 2024, 11:15 | 10.1 | 10.1 mg/l |
| 17 Sep 2024, 13:15 | 9.91 | 9.91 mg/l |
| 18 Jul 2024, 09:46 | 9.53 | 9.53 mg/l |
| 25 Jun 2024, 09:57 | 9.67 | 9.67 mg/l |
Water temperature
code 0076 · °C
17.8 °C
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | 17.8 | 17.8 °C |
| 1 Jul 2026, 11:30 | 18.6 | 18.6 °C |
| 9 Jun 2026, 11:16 | 14.1 | 14.1 °C |
| 5 May 2026, 09:58 | 13.7 | 13.7 °C |
| 13 Apr 2026, 14:56 | 11.6 | 11.6 °C |
| 2 Mar 2026, 12:09 | 9.6 | 9.6 °C |
| 5 Feb 2026, 10:55 | 8.9 | 8.9 °C |
| 7 Jan 2026, 11:53 | 7.3 | 7.3 °C |
| 3 Dec 2025, 10:56 | 9 | 9 °C |
| 14 Nov 2025, 11:55 | 12.9 | 12.9 °C |
| 7 Oct 2025, 14:18 | 14.3 | 14.3 °C |
| 5 Sep 2025, 10:47 | 16.1 | 16.1 °C |
| 4 Aug 2025, 10:59 | 18.6 | 18.6 °C |
| 15 Jul 2025, 11:14 | 18.1 | 18.1 °C |
| 13 Jun 2025, 10:24 | 16.2 | 16.2 °C |
| 29 May 2025, 12:08 | 16.9 | 16.9 °C |
| 7 Apr 2025, 14:25 | 12.2 | 12.2 °C |
| 18 Mar 2025, 11:24 | 8.3 | 8.3 °C |
| 3 Feb 2025, 12:14 | 8.2 | 8.2 °C |
| 20 Jan 2025, 12:23 | 8 | 8 °C |
| 5 Dec 2024, 12:23 | 10.8 | 10.8 °C |
| 20 Nov 2024, 12:48 | 10.2 | 10.2 °C |
| 16 Oct 2024, 11:15 | 13.6 | 13.6 °C |
| 17 Sep 2024, 13:15 | 15.9 | 15.9 °C |
| 18 Jul 2024, 09:46 | 17 | 17 °C |
| 25 Jun 2024, 09:57 | 16.6 | 16.6 °C |
pH
code 0061
7.13
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | 7.13 | 7.13 |
| 1 Jul 2026, 11:30 | 6.77 | 6.77 |
| 9 Jun 2026, 11:16 | 6.65 | 6.65 |
| 5 May 2026, 09:58 | 6.68 | 6.68 |
| 13 Apr 2026, 14:56 | 6.9 | 6.9 |
| 2 Mar 2026, 12:09 | 6.7 | 6.7 |
| 5 Feb 2026, 10:55 | 6.71 | 6.71 |
| 7 Jan 2026, 11:53 | 6.85 | 6.85 |
| 3 Dec 2025, 10:56 | 6.56 | 6.56 |
| 14 Nov 2025, 11:55 | 6.75 | 6.75 |
| 7 Oct 2025, 14:18 | 6.42 | 6.42 |
| 5 Sep 2025, 10:47 | 6.92 | 6.92 |
| 4 Aug 2025, 10:59 | 6.95 | 6.95 |
| 15 Jul 2025, 11:14 | 6.98 | 6.98 |
| 13 Jun 2025, 10:24 | 7 | 7 |
| 29 May 2025, 12:08 | 7.08 | 7.08 |
| 7 Apr 2025, 14:25 | 6.82 | 6.82 |
| 18 Mar 2025, 11:24 | 6.76 | 6.76 |
| 3 Feb 2025, 12:14 | 6.65 | 6.65 |
| 20 Jan 2025, 12:23 | 6.94 | 6.94 |
| 5 Dec 2024, 12:23 | 6.84 | 6.84 |
| 20 Nov 2024, 12:48 | 6.78 | 6.78 |
| 16 Oct 2024, 11:15 | 6.51 | 6.51 |
| 17 Sep 2024, 13:15 | 6.66 | 6.66 |
| 18 Jul 2024, 09:46 | 6.7 | 6.7 |
| 25 Jun 2024, 09:57 | 6.97 | 6.97 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2026, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2026, 11:16 | 0.053 | 0.053 mg/l |
| 5 May 2026, 09:58 | 0.051 | 0.051 mg/l |
| 13 Apr 2026, 14:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 12:09 | 0.054 | 0.054 mg/l |
| 5 Feb 2026, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 11:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2025, 10:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Nov 2025, 11:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Oct 2025, 14:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 10:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Aug 2025, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2025, 11:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jun 2025, 10:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2025, 12:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Apr 2025, 14:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2025, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2025, 12:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2024, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2024, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2024, 11:15 | 0.034 | 0.034 mg/l |
| 17 Sep 2024, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2024, 09:46 | 0.033 | 0.033 mg/l |
| 25 Jun 2024, 09:57 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.566 mg/l
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | 0.566 | 0.566 mg/l |
| 1 Jul 2026, 11:30 | 0.696 | 0.696 mg/l |
| 9 Jun 2026, 11:16 | 0.856 | 0.856 mg/l |
| 5 May 2026, 09:58 | 0.916 | 0.916 mg/l |
| 13 Apr 2026, 14:56 | 0.696 | 0.696 mg/l |
| 2 Mar 2026, 12:09 | 0.726 | 0.726 mg/l |
| 5 Feb 2026, 10:55 | 0.686 | 0.686 mg/l |
| 7 Jan 2026, 11:53 | 0.656 | 0.656 mg/l |
| 3 Dec 2025, 10:56 | 0.746 | 0.746 mg/l |
| 14 Nov 2025, 11:55 | 0.816 | 0.816 mg/l |
| 7 Oct 2025, 14:18 | 0.726 | 0.726 mg/l |
| 5 Sep 2025, 10:47 | 0.656 | 0.656 mg/l |
| 4 Aug 2025, 10:59 | 0.386 | 0.386 mg/l |
| 15 Jul 2025, 11:14 | 0.566 | 0.566 mg/l |
| 13 Jun 2025, 10:24 | 0.576 | 0.576 mg/l |
| 29 May 2025, 12:08 | 0.576 | 0.576 mg/l |
| 7 Apr 2025, 14:25 | 0.946 | 0.946 mg/l |
| 18 Mar 2025, 11:24 | 0.736 | 0.736 mg/l |
| 3 Feb 2025, 12:14 | 0.976 | 0.976 mg/l |
| 20 Jan 2025, 12:23 | 0.596 | 0.596 mg/l |
| 5 Dec 2024, 12:23 | 0.766 | 0.766 mg/l |
| 20 Nov 2024, 12:48 | 0.796 | 0.796 mg/l |
| 16 Oct 2024, 11:15 | 0.876 | 0.876 mg/l |
| 17 Sep 2024, 13:15 | 0.986 | 0.986 mg/l |
| 18 Jul 2024, 09:46 | 0.946 | 0.946 mg/l |
| 25 Jun 2024, 09:57 | 0.606 | 0.606 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | <0.01 | below 0.01 mg/l (not detected above this) |
| 1 Jul 2026, 11:30 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Jun 2026, 11:16 | 0.012 | 0.012 mg/l |
| 5 May 2026, 09:58 | <0.01 | below 0.01 mg/l (not detected above this) |
| 13 Apr 2026, 14:56 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Mar 2026, 12:09 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Feb 2026, 10:55 | 0.013 | 0.013 mg/l |
| 7 Jan 2026, 11:53 | 0.011 | 0.011 mg/l |
| 3 Dec 2025, 10:56 | <0.01 | below 0.01 mg/l (not detected above this) |
| 14 Nov 2025, 11:55 | 0.014 | 0.014 mg/l |
| 7 Oct 2025, 14:18 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Sep 2025, 10:47 | 0.01 | 0.01 mg/l |
| 4 Aug 2025, 10:59 | 0.012 | 0.012 mg/l |
| 15 Jul 2025, 11:14 | 0.027 | 0.027 mg/l |
| 13 Jun 2025, 10:24 | <0.01 | below 0.01 mg/l (not detected above this) |
| 29 May 2025, 12:08 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Apr 2025, 14:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Mar 2025, 11:24 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Feb 2025, 12:14 | 0.018 | 0.018 mg/l |
| 20 Jan 2025, 12:23 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Dec 2024, 12:23 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Nov 2024, 12:48 | 0.011 | 0.011 mg/l |
| 16 Oct 2024, 11:15 | 0.011 | 0.011 mg/l |
| 17 Sep 2024, 13:15 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Jul 2024, 09:46 | <0.01 | below 0.01 mg/l (not detected above this) |
| 25 Jun 2024, 09:57 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
166 µS/cm
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 09:57 | 166 | 166 µS/cm |
| 1 Jul 2026, 11:30 | 149 | 149 µS/cm |
| 9 Jun 2026, 11:16 | 147 | 147 µS/cm |
| 5 May 2026, 09:58 | 159 | 159 µS/cm |
| 13 Apr 2026, 14:56 | 142 | 142 µS/cm |
| 2 Mar 2026, 12:09 | 127 | 127 µS/cm |
| 5 Feb 2026, 10:55 | 130 | 130 µS/cm |
| 7 Jan 2026, 11:53 | 144 | 144 µS/cm |
| 3 Dec 2025, 10:56 | 149 | 149 µS/cm |
| 14 Nov 2025, 11:55 | 143 | 143 µS/cm |
| 7 Oct 2025, 14:18 | 161 | 161 µS/cm |
| 5 Sep 2025, 10:47 | 170 | 170 µS/cm |
| 4 Aug 2025, 10:59 | 173 | 173 µS/cm |
| 15 Jul 2025, 11:14 | 175 | 175 µS/cm |
| 13 Jun 2025, 10:24 | 164 | 164 µS/cm |
| 29 May 2025, 12:08 | 164 | 164 µS/cm |
| 7 Apr 2025, 14:25 | 157 | 157 µS/cm |
| 18 Mar 2025, 11:24 | 151 | 151 µS/cm |
| 3 Feb 2025, 12:14 | 137 | 137 µS/cm |
| 20 Jan 2025, 12:23 | 143 | 143 µS/cm |
| 5 Dec 2024, 12:23 | 144 | 144 µS/cm |
| 20 Nov 2024, 12:48 | 147 | 147 µS/cm |
| 16 Oct 2024, 11:15 | 143 | 143 µS/cm |
| 17 Sep 2024, 13:15 | 160 | 160 µS/cm |
| 18 Jul 2024, 09:46 | 157 | 157 µS/cm |
| 25 Jun 2024, 09:57 | 163 | 163 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 | 26 | Jun 2024 – Aug 2026 | 96.8% 3 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Jun 2024 – Aug 2026 | 9.18 mg/l 3 Aug 2026 |
| Temperature of Water 0076 | River water | 26 | Jun 2024 – Aug 2026 | 17.8 °C 3 Aug 2026 |
| pH 0061 | River water | 26 | Jun 2024 – Aug 2026 | 7.13 3 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jun 2024 – Aug 2026 | below 0.03 mg/l 3 Aug 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – Aug 2026 | 0.566 mg/l 3 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jun 2024 – Aug 2026 | below 0.01 mg/l 3 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Jun 2024 – Aug 2026 | 166 µS/cm 3 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jun 2024 – Aug 2026 | 10 mg/l 3 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jun 2024 – Aug 2026 | below 0.00013 mg/l 3 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – May 2026 | 1.4 mg/l 5 May 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – Aug 2026 | below 0.004 mg/l 3 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – Aug 2026 | 0.57 mg/l 3 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 12 | Apr 2025 – Aug 2026 | below 3 mg/l 3 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.