Polgooth Stream upstream of St Austell River
EA name: POLGOOTH STREAM U/S ST AUSTELL RIVER (also listed as “POLGOOTH STREAM PRIOR TO ST. AUSTELL RIVER”)
Environment Agency sampling point SW-81810304 · 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 Sep 2026, 13:2128 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 13 since 7 Apr 2025 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 200711, 49813As published, to the nearest 1 m. Open in a map
- River, by its own name
- Polgooth Stream
- River, by the map
- Polgooth StreamPlaced on the river its name gives, 6 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Why it was sampled
- Environmental monitoring statutory (EU directives) (13 samples)
3 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.4%
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 95.4 | 95.4% |
| 5 May 2026, 10:31 | 77.1 | 77.1% |
| 13 Apr 2026, 14:36 | 95.5 | 95.5% |
| 16 Mar 2026, 11:05 | 97 | 97% |
| 4 Feb 2026, 12:48 | 97 | 97% |
| 15 Jan 2026, 10:27 | 96.5 | 96.5% |
| 3 Dec 2025, 12:20 | 97.2 | 97.2% |
| 6 Nov 2025, 12:01 | 93.7 | 93.7% |
| 7 Oct 2025, 13:45 | 88.7 | 88.7% |
| 7 Apr 2025, 12:55 | 98.8 | 98.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.1 mg/l
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 10.1 | 10.1 mg/l |
| 5 May 2026, 10:31 | 8.29 | 8.29 mg/l |
| 13 Apr 2026, 14:36 | 10.2 | 10.2 mg/l |
| 16 Mar 2026, 11:05 | 10.7 | 10.7 mg/l |
| 4 Feb 2026, 12:48 | 10.8 | 10.8 mg/l |
| 15 Jan 2026, 10:27 | 10.9 | 10.9 mg/l |
| 3 Dec 2025, 12:20 | 11 | 11 mg/l |
| 6 Nov 2025, 12:01 | 9.72 | 9.72 mg/l |
| 7 Oct 2025, 13:45 | 9.14 | 9.14 mg/l |
| 7 Apr 2025, 12:55 | 10.8 | 10.8 mg/l |
Water temperature
code 0076 · °C
12.7 °C
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 12.7 | 12.7 °C |
| 5 May 2026, 10:31 | 12 | 12 °C |
| 13 Apr 2026, 14:36 | 12.3 | 12.3 °C |
| 16 Mar 2026, 11:05 | 10.9 | 10.9 °C |
| 4 Feb 2026, 12:48 | 10.5 | 10.5 °C |
| 15 Jan 2026, 10:27 | 9.8 | 9.8 °C |
| 3 Dec 2025, 12:20 | 9.9 | 9.9 °C |
| 6 Nov 2025, 12:01 | 13.6 | 13.6 °C |
| 7 Oct 2025, 13:45 | 13.9 | 13.9 °C |
| 7 Apr 2025, 12:55 | 11.4 | 11.4 °C |
pH
code 0061
7.09
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 7.09 | 7.09 |
| 5 May 2026, 10:31 | 6.89 | 6.89 |
| 13 Apr 2026, 14:36 | 7.08 | 7.08 |
| 16 Mar 2026, 11:05 | 7.28 | 7.28 |
| 4 Feb 2026, 12:48 | 7.12 | 7.12 |
| 15 Jan 2026, 10:27 | 7.14 | 7.14 |
| 3 Dec 2025, 12:20 | 7.25 | 7.25 |
| 6 Nov 2025, 12:01 | 7.42 | 7.42 |
| 7 Oct 2025, 13:45 | 7.19 | 7.19 |
| 7 Apr 2025, 12:55 | 7.5 | 7.5 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.14 mg/l
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 0.14 | 0.14 mg/l |
| 5 May 2026, 10:31 | 0.24 | 0.24 mg/l |
| 13 Apr 2026, 14:36 | 0.041 | 0.041 mg/l |
| 16 Mar 2026, 11:05 | 0.073 | 0.073 mg/l |
| 4 Feb 2026, 12:48 | 0.12 | 0.12 mg/l |
| 15 Jan 2026, 10:27 | 0.058 | 0.058 mg/l |
| 3 Dec 2025, 12:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Nov 2025, 12:01 | 0.042 | 0.042 mg/l |
| 7 Oct 2025, 13:45 | 0.42 | 0.42 mg/l |
| 7 Apr 2025, 12:55 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.98 mg/l
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 2.98 | 2.98 mg/l |
| 5 May 2026, 10:31 | 1.38 | 1.38 mg/l |
| 13 Apr 2026, 14:36 | 3.8 | 3.8 mg/l |
| 16 Mar 2026, 11:05 | 4.09 | 4.09 mg/l |
| 4 Feb 2026, 12:48 | 4.09 | 4.09 mg/l |
| 15 Jan 2026, 10:27 | 3.6 | 3.6 mg/l |
| 3 Dec 2025, 12:20 | 4.1 | 4.1 mg/l |
| 6 Nov 2025, 12:01 | 3.29 | 3.29 mg/l |
| 7 Oct 2025, 13:45 | 3.18 | 3.18 mg/l |
| 7 Apr 2025, 12:55 | 4.3 | 4.3 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.031 mg/l
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 0.031 | 0.031 mg/l |
| 5 May 2026, 10:31 | 0.032 | 0.032 mg/l |
| 13 Apr 2026, 14:36 | 0.014 | 0.014 mg/l |
| 16 Mar 2026, 11:05 | 0.029 | 0.029 mg/l |
| 4 Feb 2026, 12:48 | 0.028 | 0.028 mg/l |
| 15 Jan 2026, 10:27 | 0.038 | 0.038 mg/l |
| 3 Dec 2025, 12:20 | 0.029 | 0.029 mg/l |
| 6 Nov 2025, 12:01 | 0.026 | 0.026 mg/l |
| 7 Oct 2025, 13:45 | 0.045 | 0.045 mg/l |
| 7 Apr 2025, 12:55 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
229 µS/cm
Sampled 9 Jun 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Jun 2026, 12:01 | 229 | 229 µS/cm |
| 5 May 2026, 10:31 | 229 | 229 µS/cm |
| 13 Apr 2026, 14:36 | 239 | 239 µS/cm |
| 16 Mar 2026, 11:05 | 238 | 238 µS/cm |
| 4 Feb 2026, 12:48 | 229 | 229 µS/cm |
| 15 Jan 2026, 10:27 | 255 | 255 µS/cm |
| 3 Dec 2025, 12:20 | 231 | 231 µS/cm |
| 6 Nov 2025, 12:01 | 254 | 254 µS/cm |
| 7 Oct 2025, 13:45 | 258 | 258 µS/cm |
| 7 Apr 2025, 12:55 | 244 | 244 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 | 10 | Apr 2025 – Jun 2026 | 95.4% 9 Jun 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Apr 2025 – Jun 2026 | 10.1 mg/l 9 Jun 2026 |
| Temperature of Water 0076 | River water | 10 | Apr 2025 – Jun 2026 | 12.7 °C 9 Jun 2026 |
| pH 0061 | River water | 10 | Apr 2025 – Jun 2026 | 7.09 9 Jun 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Apr 2025 – Jun 2026 | 0.14 mg/l 9 Jun 2026 |
| Nitrate as N 0117 | River water | 10 | Apr 2025 – Jun 2026 | 2.98 mg/l 9 Jun 2026 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Apr 2025 – Jun 2026 | 0.031 mg/l 9 Jun 2026 |
| Conductivity at 25 C 0077 | River water | 10 | Apr 2025 – Jun 2026 | 229 µS/cm 9 Jun 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Apr 2025 – Jun 2026 | 30 mg/l 9 Jun 2026 |
| Ammonia un-ionised as N 0119 | River water | 10 | Apr 2025 – Jun 2026 | 0.00039 mg/l 9 Jun 2026 |
| Nitrite as N 0118 | River water | 10 | Apr 2025 – Jun 2026 | 0.023 mg/l 9 Jun 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Apr 2025 – Jun 2026 | 3 mg/l 9 Jun 2026 |
| No flow /No sample 7668 | River water | 3 | Jul 2026 – Sep 2026 | No flow/discharge at sampling point 3 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 10 | Apr 2025 – Jun 2026 | 4.3 mg/l 9 Jun 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.