Trevaylor Stream at A. 30 Bridge at Chyandour
EA name: TREVAYLOR STREAM AT A30 BRIDGE CHYANDOUR (also listed as “TREVAYLOR STREAM AT A.30 BRIDGE AT CHYANDOUR”)
Environment Agency sampling point SW-82111503 · 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
- 4 Nov 2025, 13:5511 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
- 41 since 3 May 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)
- Where
- National Grid 148120, 31150As published, to the nearest 10 m. Open in a map
- River, by its own name
- Trevaylor Stream
- River, by the map
- Not placedIts name gives Trevaylor Stream; the only line close by, 2 m away, is Ponsandane Brook and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Planned investigation (local monitoring) (41 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.1%
Sampled 4 Nov 2025, 11 months ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Nov 2025, 13:55 | 99.1 | 99.1% |
Water temperature
code 0076 · °C
13.2 °C
Sampled 4 Nov 2025, 11 months ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Nov 2025, 13:55 | 13.2 | 13.2 °C |
pH
code 0061
7.09
Sampled 4 Nov 2025, 11 months ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Nov 2025, 13:55 | 7.09 | 7.09 |
Conductivity
at 25 °C · code 0077 · µS/cm
180 µS/cm
Sampled 4 Nov 2025, 11 months ago · 1 result banked
Every result (1)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Nov 2025, 13:55 | 180 | 180 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
17000 per 100 ml
Sampled 4 Nov 2025, 11 months ago · 41 results banked
Every result (41)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Nov 2025, 13:55 | 17000 | 17000 per 100 ml |
| 16 Sep 2025, 11:59 | 370 | 370 per 100 ml |
| 12 Sep 2025, 11:18 | 3500 | 3500 per 100 ml |
| 1 Sep 2025, 10:41 | 5100 | 5100 per 100 ml |
| 29 Aug 2025, 10:57 | 6400 | 6400 per 100 ml |
| 21 Aug 2025, 11:13 | 660 | 660 per 100 ml |
| 11 Aug 2025, 12:00 | 2200 | 2200 per 100 ml |
| 7 Aug 2025, 11:06 | 1000 | 1000 per 100 ml |
| 30 Jul 2025, 11:02 | 680 | 680 per 100 ml |
| 24 Jul 2025, 11:26 | 1200 | 1200 per 100 ml |
| 13 Jul 2025, 11:20 | 510 | 510 per 100 ml |
| 9 Jul 2025, 11:10 | 1100 | 1100 per 100 ml |
| 30 Jun 2025, 11:40 | 520 | 520 per 100 ml |
| 23 Jun 2025, 11:55 | 460 | 460 per 100 ml |
| 17 Jun 2025, 12:12 | 1000 | 1000 per 100 ml |
| 11 Jun 2025, 10:47 | 1400 | 1400 per 100 ml |
| 6 Jun 2025, 10:19 | 450 | 450 per 100 ml |
| 29 May 2025, 11:35 | 310 | 310 per 100 ml |
| 24 May 2025, 11:58 | 1300 | 1300 per 100 ml |
| 20 May 2025, 11:20 | 380 | 380 per 100 ml |
| 6 May 2025, 11:32 | 72 | 72 per 100 ml |
| 19 Sep 2024, 12:12 | 550 | 550 per 100 ml |
| 9 Sep 2024, 11:10 | 880 | 880 per 100 ml |
| 4 Sep 2024, 10:42 | 770 | 770 per 100 ml |
| 28 Aug 2024, 10:58 | 4100 | 4100 per 100 ml |
| 22 Aug 2024, 10:59 | 1400 | 1400 per 100 ml |
| 12 Aug 2024, 10:55 | 700 | 700 per 100 ml |
| 8 Aug 2024, 10:40 | 14000 | 14000 per 100 ml |
| 3 Aug 2024, 11:40 | 460 | 460 per 100 ml |
| 26 Jul 2024, 11:22 | 2600 | 2600 per 100 ml |
| 19 Jul 2024, 11:29 | 480 | 480 per 100 ml |
| 11 Jul 2024, 11:05 | 1500 | 1500 per 100 ml |
| 7 Jul 2024, 10:55 | 2100 | 2100 per 100 ml |
| 27 Jun 2024, 11:25 | 860 | 860 per 100 ml |
| 19 Jun 2024, 11:10 | 250 | 250 per 100 ml |
| 12 Jun 2024, 10:53 | 240 | 240 per 100 ml |
| 7 Jun 2024, 10:58 | 190 | 190 per 100 ml |
| 28 May 2024, 10:48 | 610 | 610 per 100 ml |
| 22 May 2024, 11:45 | 250 | 250 per 100 ml |
| 17 May 2024, 11:30 | 110 | 110 per 100 ml |
| 3 May 2024, 11:47 | 300 | 300 per 100 ml |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 1 | Nov 2025 – Nov 2025 | 99.1% 4 Nov 2025 |
| Temperature of Water 0076 | River water | 1 | Nov 2025 – Nov 2025 | 13.2 °C 4 Nov 2025 |
| pH 0061 | River water | 1 | Nov 2025 – Nov 2025 | 7.09 4 Nov 2025 |
| Conductivity at 25 C 0077 | River water | 1 | Nov 2025 – Nov 2025 | 180 µS/cm 4 Nov 2025 |
| Escherichia coli : Confirmed : MF 2348 | River water | 41 | May 2024 – Nov 2025 | 17000 per 100 ml 4 Nov 2025 |
| Bacteroides HF183 primer 5886 | River water | 1 | Nov 2025 – Nov 2025 | Present / 100ml 4 Nov 2025 |
| Bacteroidetes Marker : Human copy number 3820 | River water | 1 | Nov 2025 – Nov 2025 | 5.7 log (10) gene copies / 100ml 4 Nov 2025 |
| Bacteroidetes Marker : Ruminant 4906 | River water | 1 | Nov 2025 – Nov 2025 | Present 4 Nov 2025 |
| Bacteroidetes Marker : Ruminant copy number 3819 | River water | 1 | Nov 2025 – Nov 2025 | 6.6 log (10) gene copies / 100ml 4 Nov 2025 |
| Catellicoccus Marker : Seabird 3120 | River water | 1 | Nov 2025 – Nov 2025 | Present 4 Nov 2025 |
| Catellicoccus Marker : Seabird Copy Number 3116 | River water | 1 | Nov 2025 – Nov 2025 | 4.7 log (10) gene copies / 100ml 4 Nov 2025 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 41 | May 2024 – Nov 2025 | 4100 colony forming units / 100ml 4 Nov 2025 |
| Microbial Source Tracking 4876 | River water | 1 | Nov 2025 – Nov 2025 | 1 text result 4 Nov 2025 |
| Mitochondrial Marker : Canine 4870 | River water | 1 | Nov 2025 – Nov 2025 | Present 4 Nov 2025 |
| Mitochrondrial Marker: Canine copy number 3816 | River water | 1 | Nov 2025 – Nov 2025 | 3.4 log (10) gene copies / 100ml 4 Nov 2025 |
| MST Filtration 4926 | River water | 41 | May 2024 – Nov 2025 | DNA Stored 4 Nov 2025 |
| Preparation: DNA 5923 | River water | 1 | Nov 2025 – Nov 2025 | Done 4 Nov 2025 |
| Volume of Sample Filtered 4865 | River water | 41 | May 2024 – Nov 2025 | 290 millilitre 4 Nov 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.