Treverbyn Stream at Penrose
EA name: TREVERBYN STREAM AT PENROSE
Environment Agency sampling point SW-81610559 · 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
- 28 Sep 2026, 14:4010 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 15 since 1 Nov 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring) · results completed 3 Oct 2026
- Where
- National Grid 204280, 57200As published, to the nearest 10 m. Open in a map
- River, by its own name
- Treverbyn Stream
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 14 m from the line.
- Next gauge downstream
- Ponts Vale On the Par River · 5.7 km along the river (the path rests on a repair to the map)
- Why it was sampled
- Planned investigation (local monitoring) (15 samples)
Results here were completed a median of 6 days after the sample was taken (3 to 9 days, 4 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
85.6%
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 85.6 | 85.6% |
| 3 Aug 2026, 09:21 | 92.6 | 92.6% |
| 7 Jul 2026, 11:17 | 96.2 | 96.2% |
| 18 Jun 2026, 10:09 | 91.5 | 91.5% |
| 11 May 2026, 11:20 | 89.8 | 89.8% |
| 13 Apr 2026, 15:33 | 90.6 | 90.6% |
| 19 Mar 2026, 12:37 | 91.6 | 91.6% |
| 6 Jan 2026, 14:33 | 92.9 | 92.9% |
| 7 Nov 2025, 13:23 | 83 | 83% |
| 1 Mar 2024, 11:08 | 91.9 | 91.9% |
| 17 Jan 2024, 09:46 | 91.1 | 91.1% |
| 1 Nov 2023, 14:45 | 86.9 | 86.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.9 mg/l
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 8.9 | 8.9 mg/l |
| 3 Aug 2026, 09:21 | 9.67 | 9.67 mg/l |
| 7 Jul 2026, 11:17 | 9.41 | 9.41 mg/l |
| 18 Jun 2026, 10:09 | 9.26 | 9.26 mg/l |
| 11 May 2026, 11:20 | 9.84 | 9.84 mg/l |
| 13 Apr 2026, 15:33 | 9.88 | 9.88 mg/l |
| 19 Mar 2026, 12:37 | 10.1 | 10.1 mg/l |
| 6 Jan 2026, 14:33 | 11.8 | 11.8 mg/l |
| 7 Nov 2025, 13:23 | 8.82 | 8.82 mg/l |
| 1 Mar 2024, 11:08 | 10.9 | 10.9 mg/l |
| 17 Jan 2024, 09:46 | 11.4 | 11.4 mg/l |
| 1 Nov 2023, 14:45 | 9.43 | 9.43 mg/l |
Water temperature
code 0076 · °C
13.5 °C
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 13.5 | 13.5 °C |
| 3 Aug 2026, 09:21 | 13.3 | 13.3 °C |
| 7 Jul 2026, 11:17 | 16.3 | 16.3 °C |
| 18 Jun 2026, 10:09 | 14.7 | 14.7 °C |
| 11 May 2026, 11:20 | 11.2 | 11.2 °C |
| 13 Apr 2026, 15:33 | 11.4 | 11.4 °C |
| 19 Mar 2026, 12:37 | 10.9 | 10.9 °C |
| 6 Jan 2026, 14:33 | 5.2 | 5.2 °C |
| 7 Nov 2025, 13:23 | 12.5 | 12.5 °C |
| 1 Mar 2024, 11:08 | 7.7 | 7.7 °C |
| 17 Jan 2024, 09:46 | 5.8 | 5.8 °C |
| 1 Nov 2023, 14:45 | 11.6 | 11.6 °C |
pH
code 0061
7.07
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 7.07 | 7.07 |
| 3 Aug 2026, 09:21 | 7.13 | 7.13 |
| 7 Jul 2026, 11:17 | 6.9 | 6.9 |
| 18 Jun 2026, 10:09 | 7 | 7 |
| 11 May 2026, 11:20 | 6.8 | 6.8 |
| 13 Apr 2026, 15:33 | 6.79 | 6.79 |
| 19 Mar 2026, 12:37 | 6.9 | 6.9 |
| 6 Jan 2026, 14:33 | 6.91 | 6.91 |
| 7 Nov 2025, 13:23 | 6.83 | 6.83 |
| 1 Mar 2024, 11:08 | 6.76 | 6.76 |
| 17 Jan 2024, 09:46 | 6.95 | 6.95 |
| 1 Nov 2023, 14:45 | 6.51 | 6.51 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.69 mg/l
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 0.69 | 0.69 mg/l |
| 3 Aug 2026, 09:21 | 0.11 | 0.11 mg/l |
| 7 Jul 2026, 11:17 | 0.41 | 0.41 mg/l |
| 18 Jun 2026, 10:09 | 0.17 | 0.17 mg/l |
| 11 May 2026, 11:20 | 0.33 | 0.33 mg/l |
| 13 Apr 2026, 15:33 | 0.29 | 0.29 mg/l |
| 19 Mar 2026, 12:37 | 0.09 | 0.09 mg/l |
| 6 Jan 2026, 14:33 | 0.19 | 0.19 mg/l |
| 7 Nov 2025, 13:23 | 0.21 | 0.21 mg/l |
| 1 Mar 2024, 11:08 | 0.087 | 0.087 mg/l |
| 17 Jan 2024, 09:46 | 0.07 | 0.07 mg/l |
| 1 Nov 2023, 14:45 | 0.061 | 0.061 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.752 mg/l
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 0.752 | 0.752 mg/l |
| 3 Aug 2026, 09:21 | 0.57 | 0.57 mg/l |
| 7 Jul 2026, 11:17 | 0.652 | 0.652 mg/l |
| 18 Jun 2026, 10:09 | 0.659 | 0.659 mg/l |
| 11 May 2026, 11:20 | 0.763 | 0.763 mg/l |
| 13 Apr 2026, 15:33 | 0.754 | 0.754 mg/l |
| 19 Mar 2026, 12:37 | 1.09 | 1.09 mg/l |
| 6 Jan 2026, 14:33 | 1.29 | 1.29 mg/l |
| 7 Nov 2025, 13:23 | 0.783 | 0.783 mg/l |
| 1 Mar 2024, 11:08 | 1.3 | 1.3 mg/l |
| 17 Jan 2024, 09:46 | 1.49 | 1.49 mg/l |
| 1 Nov 2023, 14:45 | 0.933 | 0.933 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.099 mg/l
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 0.099 | 0.099 mg/l |
| 3 Aug 2026, 09:21 | 0.043 | 0.043 mg/l |
| 7 Jul 2026, 11:17 | 0.097 | 0.097 mg/l |
| 18 Jun 2026, 10:09 | 0.049 | 0.049 mg/l |
| 11 May 2026, 11:20 | 0.054 | 0.054 mg/l |
| 13 Apr 2026, 15:33 | 0.047 | 0.047 mg/l |
| 19 Mar 2026, 12:37 | 0.021 | 0.021 mg/l |
| 6 Jan 2026, 14:33 | 0.023 | 0.023 mg/l |
| 7 Nov 2025, 13:23 | 0.047 | 0.047 mg/l |
| 1 Mar 2024, 11:08 | 0.016 | 0.016 mg/l |
| 17 Jan 2024, 09:46 | <0.01 | below 0.01 mg/l (not detected above this) |
| 1 Nov 2023, 14:45 | 0.021 | 0.021 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
155 µS/cm
Sampled 28 Sep 2026, 10 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Sep 2026, 14:40 | 155 | 155 µS/cm |
| 3 Aug 2026, 09:21 | 150 | 150 µS/cm |
| 7 Jul 2026, 11:17 | 162 | 162 µS/cm |
| 18 Jun 2026, 10:09 | 156 | 156 µS/cm |
| 11 May 2026, 11:20 | 153 | 153 µS/cm |
| 13 Apr 2026, 15:33 | 158 | 158 µS/cm |
| 19 Mar 2026, 12:37 | 150 | 150 µS/cm |
| 6 Jan 2026, 14:33 | 249 | 249 µS/cm |
| 7 Nov 2025, 13:23 | 161 | 161 µS/cm |
| 1 Mar 2024, 11:08 | 160 | 160 µS/cm |
| 17 Jan 2024, 09:46 | 173 | 173 µS/cm |
| 1 Nov 2023, 14:45 | 160 | 160 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 | 12 | Nov 2023 – Sep 2026 | 85.6% 28 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Nov 2023 – Sep 2026 | 8.9 mg/l 28 Sep 2026 |
| Temperature of Water 0076 | River water | 12 | Nov 2023 – Sep 2026 | 13.5 °C 28 Sep 2026 |
| pH 0061 | River water | 12 | Nov 2023 – Sep 2026 | 7.07 28 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Nov 2023 – Sep 2026 | 0.69 mg/l 28 Sep 2026 |
| Nitrate as N 0117 | River water | 12 | Nov 2023 – Sep 2026 | 0.752 mg/l 28 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Nov 2023 – Sep 2026 | 0.099 mg/l 28 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 12 | Nov 2023 – Sep 2026 | 155 µS/cm 28 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Nov 2023 – Sep 2026 | 28 mg/l 28 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 12 | Nov 2023 – Sep 2026 | 0.00195 mg/l 28 Sep 2026 |
| Nitrite as N 0118 | River water | 12 | Nov 2023 – Sep 2026 | 0.078 mg/l 28 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Nov 2023 – Sep 2026 | 0.83 mg/l 28 Sep 2026 |
| Solids, non-volatile at 500 C 0143 | River water | 9 | Nov 2023 – Mar 2026 | below 20 mg/l 19 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 15 | Nov 2023 – Sep 2026 | below 3 mg/l 28 Sep 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.