Tregavarras Stream at Treveor
EA name: TREGAVARRAS STREAM AT TREVEOR (also listed as “TREGAVARRAS STREAM AT TRVEOR”)
Environment Agency sampling point SW-81811205 · 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
- 21 Sep 2026, 13:5710 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 68 since 4 Apr 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring) · results completed 25 Sep 2026
- Where
- National Grid 198491, 41668As published, to the nearest 1 m. Open in a map
- River, by its own name
- Tregavarras Stream
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Planned investigation (local monitoring) (59 samples)
Unplanned reactive monitoring (pollution incidents) (9 samples)
Results here were completed a median of 4 days after the sample was taken (4 to 54 days, 25 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.2%
Sampled 10 Jul 2026, 3 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:52 | 96.2 | 96.2% |
| 29 Jul 2025, 13:05 | 97.6 | 97.6% |
| 20 Sep 2024, 13:20 | 97.2 | 97.2% |
| 10 Sep 2024, 12:31 | 100.4 | 100.4% |
| 26 Aug 2024, 11:30 | 101.3 | 101.3% |
| 21 Aug 2024, 14:15 | 97.8 | 97.8% |
| 13 Aug 2024, 12:42 | 97.8 | 97.8% |
| 8 Aug 2024, 12:09 | 92.5 | 92.5% |
| 4 Apr 2024, 15:00 | 90.9 | 90.9% |
Water temperature
code 0076 · °C
15.7 °C
Sampled 10 Jul 2026, 3 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:52 | 15.7 | 15.7 °C |
| 29 Jul 2025, 13:05 | 15.4 | 15.4 °C |
| 20 Sep 2024, 13:20 | 14.8 | 14.8 °C |
| 10 Sep 2024, 12:31 | 15.2 | 15.2 °C |
| 26 Aug 2024, 11:30 | 15.09 | 15.09 °C |
| 21 Aug 2024, 14:15 | 14 | 14 °C |
| 13 Aug 2024, 12:42 | 15.4 | 15.4 °C |
| 8 Aug 2024, 12:09 | 15.9 | 15.9 °C |
| 4 Apr 2024, 15:00 | 11.6 | 11.6 °C |
pH
code 0061
8.43
Sampled 10 Jul 2026, 3 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:52 | 8.43 | 8.43 |
| 29 Jul 2025, 13:05 | 8.13 | 8.13 |
| 20 Sep 2024, 13:20 | 8.37 | 8.37 |
| 10 Sep 2024, 12:31 | 8.54 | 8.54 |
| 26 Aug 2024, 11:30 | 8.32 | 8.32 |
| 21 Aug 2024, 14:15 | 8.12 | 8.12 |
| 13 Aug 2024, 12:42 | 8.4 | 8.4 |
| 8 Aug 2024, 12:09 | 8.23 | 8.23 |
| 4 Apr 2024, 15:00 | 7.41 | 7.41 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.5 mg/l (not detected above this)
Sampled 10 Jul 2026, 3 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:52 | <0.5 | below 0.5 mg/l (not detected above this) |
| 20 Sep 2024, 13:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Sep 2024, 12:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Aug 2024, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Aug 2024, 14:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Aug 2024, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2024, 12:09 | 0.4 | 0.4 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.5 mg/l (not detected above this)
Sampled 10 Jul 2026, 3 months ago · 7 results banked
Every result (7)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:52 | <0.5 | below 0.5 mg/l (not detected above this) |
| 20 Sep 2024, 13:20 | 0.11 | 0.11 mg/l |
| 10 Sep 2024, 12:31 | 0.13 | 0.13 mg/l |
| 26 Aug 2024, 11:30 | 0.098 | 0.098 mg/l |
| 21 Aug 2024, 14:15 | 0.098 | 0.098 mg/l |
| 13 Aug 2024, 12:42 | 0.087 | 0.087 mg/l |
| 8 Aug 2024, 12:09 | 0.11 | 0.11 mg/l |
Turbidity
code 6396 · NTU
2.2 NTU
Sampled 20 Sep 2024, 2 years ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Sep 2024, 13:20 | 2.2 | 2.2 NTU |
| 10 Sep 2024, 12:31 | 2.1 | 2.1 NTU |
| 26 Aug 2024, 11:30 | 1.5 | 1.5 NTU |
| 21 Aug 2024, 14:15 | 1.1 | 1.1 NTU |
| 13 Aug 2024, 12:42 | 2.5 | 2.5 NTU |
| 8 Aug 2024, 12:09 | 4.5 | 4.5 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
577 µS/cm
Sampled 10 Jul 2026, 3 months ago · 9 results banked
Every result (9)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Jul 2026, 11:52 | 577 | 577 µS/cm |
| 29 Jul 2025, 13:05 | 544 | 544 µS/cm |
| 20 Sep 2024, 13:20 | 594 | 594 µS/cm |
| 10 Sep 2024, 12:31 | 657 | 657 µS/cm |
| 26 Aug 2024, 11:30 | 734 | 734 µS/cm |
| 21 Aug 2024, 14:15 | 581 | 581 µS/cm |
| 13 Aug 2024, 12:42 | 616 | 616 µS/cm |
| 8 Aug 2024, 12:09 | 577 | 577 µS/cm |
| 4 Apr 2024, 15:00 | 533 | 533 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
190 per 100 ml
Sampled 21 Sep 2026, 10 days ago · 62 results banked
Every result (62)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 Sep 2026, 13:57 | 190 | 190 per 100 ml |
| 16 Sep 2026, 13:55 | 210 | 210 per 100 ml |
| 9 Sep 2026, 11:09 | 6500 | 6500 per 100 ml |
| 3 Sep 2026, 12:46 | 6800 | 6800 per 100 ml |
| 26 Aug 2026, 13:46 | 330 | 330 per 100 ml |
| 18 Aug 2026, 13:19 | 540 | 540 per 100 ml |
| 14 Aug 2026, 12:09 | 180 | 180 per 100 ml |
| 6 Aug 2026, 14:20 | 240 | 240 per 100 ml |
| 26 Jul 2026, 11:24 | 340 | 340 per 100 ml |
| 20 Jul 2026, 14:19 | 91 | 91 per 100 ml |
| 14 Jul 2026, 11:43 | 780 | 780 per 100 ml |
| 10 Jul 2026, 11:48 | 480 | 480 per 100 ml |
| 30 Jun 2026, 11:20 | 310 | 310 per 100 ml |
| 23 Jun 2026, 12:20 | 330 | 330 per 100 ml |
| 18 Jun 2026, 12:36 | 320 | 320 per 100 ml |
| 8 Jun 2026, 13:42 | 2900 | 2900 per 100 ml |
| 1 Jun 2026, 12:01 | 1400 | 1400 per 100 ml |
| 27 May 2026, 12:42 | 1000 | 1000 per 100 ml |
| 21 May 2026, 12:25 | 760 | 760 per 100 ml |
| 16 May 2026, 12:25 | 27 | 27 per 100 ml |
| 17 Sep 2025, 11:50 | 7300 | 7300 per 100 ml |
| 8 Sep 2025, 13:57 | 1200 | 1200 per 100 ml |
| 4 Sep 2025, 11:30 | 31000 | 31000 per 100 ml |
| 28 Aug 2025, 11:02 | 4400 | 4400 per 100 ml |
| 19 Aug 2025, 14:40 | 34000 | 34000 per 100 ml |
| 15 Aug 2025, 10:55 | 730 | 730 per 100 ml |
| 5 Aug 2025, 13:48 | 2200 | 2200 per 100 ml |
| 1 Aug 2025, 12:00 | 880 | 880 per 100 ml |
| 29 Jul 2025, 13:05 | 700 | 700 per 100 ml |
| 21 Jul 2025, 12:18 | 45000 | 45000 per 100 ml |
| 15 Jul 2025, 11:55 | 520 | 520 per 100 ml |
| 11 Jul 2025, 11:30 | 2200 | 2200 per 100 ml |
| 2 Jul 2025, 13:05 | 210 | 210 per 100 ml |
| 27 Jun 2025, 11:35 | 240 | 240 per 100 ml |
| 22 Jun 2025, 12:22 | 77000 | 77000 per 100 ml |
| 9 Jun 2025, 12:53 | 72 | 72 per 100 ml |
| 3 Jun 2025, 12:00 | 8500 | 8500 per 100 ml |
| 28 May 2025, 12:28 | 5200 | 5200 per 100 ml |
| 23 May 2025, 12:52 | 130 | 130 per 100 ml |
| 18 May 2025, 11:40 | 180 | 180 per 100 ml |
| 3 May 2025, 12:00 | 190 | 190 per 100 ml |
| 20 Sep 2024, 13:21 | 580 | 580 per 100 ml |
| 10 Sep 2024, 12:30 | 2600 | 2600 per 100 ml |
| 3 Sep 2024, 13:45 | 1600 | 1600 per 100 ml |
| 26 Aug 2024, 11:31 | 750 | 750 per 100 ml |
| 23 Aug 2024, 11:35 | 630 | 630 per 100 ml |
| 21 Aug 2024, 14:15 | 230 | 230 per 100 ml |
| 13 Aug 2024, 12:41 | 360 | 360 per 100 ml |
| 8 Aug 2024, 12:10 | >100000 | above 100000 per 100 ml (the most the test can count) |
| 29 Jul 2024, 14:00 | 240 | 240 per 100 ml |
| 24 Jul 2024, 11:45 | 470 | 470 per 100 ml |
| 21 Jul 2024, 14:00 | 2700 | 2700 per 100 ml |
| 8 Jul 2024, 11:54 | >100000 | above 100000 per 100 ml (the most the test can count) |
| 3 Jul 2024, 12:54 | 2400 | 2400 per 100 ml |
| 24 Jun 2024, 15:23 | 140 | 140 per 100 ml |
| 17 Jun 2024, 12:27 | 3700 | 3700 per 100 ml |
| 11 Jun 2024, 13:55 | 500 | 500 per 100 ml |
| 4 Jun 2024, 13:16 | 550 | 550 per 100 ml |
| 25 May 2024, 12:50 | 580 | 580 per 100 ml |
| 17 May 2024, 13:10 | 600 | 600 per 100 ml |
| 3 May 2024, 15:00 | 1700 | 1700 per 100 ml |
| 4 Apr 2024, 15:00 | 110000 | 110000 per 100 ml |
Everything measured here
29 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 29 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 9 | Apr 2024 – Jul 2026 | 96.2% 10 Jul 2026 |
| Temperature of Water 0076 | River water | 9 | Apr 2024 – Jul 2026 | 15.7 °C 10 Jul 2026 |
| pH 0061 | River water | 9 | Apr 2024 – Jul 2026 | 8.43 10 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 7 | Aug 2024 – Jul 2026 | below 0.5 mg/l 10 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 7 | Aug 2024 – Jul 2026 | below 0.5 mg/l 10 Jul 2026 |
| Turbidity 6396 | River water | 6 | Aug 2024 – Sep 2024 | 2.2 NTU 20 Sep 2024 |
| Conductivity at 25 C 0077 | River water | 9 | Apr 2024 – Jul 2026 | 577 µS/cm 10 Jul 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 62 | Apr 2024 – Sep 2026 | 190 per 100 ml 21 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 6 | Aug 2024 – Sep 2024 | below 0.00078 mg/l 20 Sep 2024 |
| Bacteroides HF183 primer 5886 | River water | 6 | Jul 2024 – Sep 2025 | Present / 100ml 4 Sep 2025 |
| Bacteroidetes Marker : Human copy number 3820 | River water | 6 | Jul 2024 – Sep 2025 | below 2 log (10) gene copies / 100ml 4 Sep 2025 |
| Bacteroidetes Marker : Ruminant 4906 | River water | 6 | Jul 2024 – Sep 2025 | Present 4 Sep 2025 |
| Bacteroidetes Marker : Ruminant copy number 3819 | River water | 6 | Jul 2024 – Sep 2025 | 5 log (10) gene copies / 100ml 4 Sep 2025 |
| BOD : 5 Day ATU 0085 | River water | 7 | Aug 2024 – Jul 2026 | below 1 mg/l 10 Jul 2026 |
| Catellicoccus Marker : Seabird 3120 | River water | 4 | Jun 2025 – Sep 2025 | Present 4 Sep 2025 |
| Catellicoccus Marker : Seabird Copy Number 3116 | River water | 4 | Jun 2025 – Sep 2025 | below 2 log (10) gene copies / 100ml 4 Sep 2025 |
| Chloride 0172 | River water | 7 | Aug 2024 – Jul 2026 | 41 mg/l 10 Jul 2026 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 62 | Apr 2024 – Sep 2026 | 300 colony forming units / 100ml 21 Sep 2026 |
| Microbial Source Tracking 4876 | River water | 6 | Jul 2024 – Sep 2025 | 1 text result 4 Sep 2025 |
| Mitochondrial Marker : Canine 4870 | River water | 4 | Jun 2025 – Sep 2025 | Not found 4 Sep 2025 |
| Mitochrondrial Marker: Canine copy number 3816 | River water | 4 | Jun 2025 – Sep 2025 | below 2 log (10) gene copies / 100ml 4 Sep 2025 |
| MST Filtration 4926 | River water | 61 | May 2024 – Sep 2026 | DNA Stored 21 Sep 2026 |
| National Grid Reference : Whole : Field report 7434 | River water | 2 | Sep 2024 – Jul 2026 | 1 unitless value 10 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 7 | Aug 2024 – Jul 2026 | 11 mg/l 10 Jul 2026 |
| Preparation: DNA 5923 | River water | 6 | Jul 2024 – Sep 2025 | Done 4 Sep 2025 |
| Salinity : In Situ 7608 | River water | 1 | Aug 2024 – Aug 2024 | 0.36 parts per thousand 26 Aug 2024 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Jul 2026 – Jul 2026 | below 3 mg/l 10 Jul 2026 |
| Visible oil or grease, significant trace: Present/Not found (1/0) 0664 | River water | 5 | Aug 2024 – Jul 2026 | Not found 10 Jul 2026 |
| Volume of Sample Filtered 4865 | River water | 61 | May 2024 – Sep 2026 | 750 millilitre 21 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.