Porth Spring at Porth Beach Slipway
EA name: PORTH SPRING AT PORTH BEACH SLIPWAY
Environment Agency sampling point SW-82515050 · 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
- 15 Sep 2026, 11:5216 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 60 since 5 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 182965, 62679As published, to the nearest 1 m. Open in a map
- River, by its own name
- Porth Spring
- River, by the map
- Not placedNearest line is 204 m away and its name does not agree. 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) (1 samples)
Main measurements, river water
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
2000 per 100 ml
Sampled 15 Sep 2026, 16 days ago · 39 results banked
Also measured in number per hundred millilitres on another sample material (2IZZ): 20 results, kept apart (see the table).
Every result (39)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 Sep 2026, 11:52 | 2000 | 2000 per 100 ml |
| 10 Sep 2026, 13:45 | 940 | 940 per 100 ml |
| 5 Sep 2026, 12:10 | 300 | 300 per 100 ml |
| 28 Aug 2026, 10:20 | 3600 | 3600 per 100 ml |
| 17 Aug 2026, 10:10 | 1100 | 1100 per 100 ml |
| 12 Aug 2026, 10:15 | 530 | 530 per 100 ml |
| 7 Aug 2026, 10:15 | 3800 | 3800 per 100 ml |
| 26 Jul 2026, 10:40 | 400 | 400 per 100 ml |
| 21 Jul 2026, 13:08 | 170 | 170 per 100 ml |
| 17 Jul 2026, 13:26 | 10000 | 10000 per 100 ml |
| 8 Jul 2026, 10:05 | 8200 | 8200 per 100 ml |
| 1 Jul 2026, 12:08 | 1900 | 1900 per 100 ml |
| 22 Jun 2026, 11:20 | 1400 | 1400 per 100 ml |
| 17 Jun 2026, 15:06 | 3500 | 3500 per 100 ml |
| 11 Jun 2026, 12:31 | 9000 | 9000 per 100 ml |
| 3 Jun 2026, 10:10 | 7900 | 7900 per 100 ml |
| 29 May 2026, 11:02 | 1100 | 1100 per 100 ml |
| 22 May 2026, 10:10 | 1600 | 1600 per 100 ml |
| 17 May 2026, 10:30 | 810 | 810 per 100 ml |
| 19 Sep 2025, 14:30 | 99 | 99 per 100 ml |
| 14 Sep 2025, 10:05 | 360 | 360 per 100 ml |
| 2 Sep 2025, 13:35 | 490 | 490 per 100 ml |
| 27 Aug 2025, 16:30 | 950 | 950 per 100 ml |
| 20 Aug 2025, 10:12 | 8100 | 8100 per 100 ml |
| 14 Aug 2025, 15:43 | 180 | 180 per 100 ml |
| 8 Aug 2025, 14:45 | 330 | 330 per 100 ml |
| 1 Aug 2025, 15:30 | 130 | 130 per 100 ml |
| 25 Jul 2025, 14:45 | 570 | 570 per 100 ml |
| 7 Jul 2025, 13:20 | 2000 | 2000 per 100 ml |
| 3 Jul 2025, 10:08 | 500 | 500 per 100 ml |
| 26 Jun 2025, 15:07 | 200 | 200 per 100 ml |
| 20 Jun 2025, 14:43 | 110 | 110 per 100 ml |
| 12 Jun 2025, 10:10 | 1800 | 1800 per 100 ml |
| 3 Jun 2025, 10:05 | 860 | 860 per 100 ml |
| 27 May 2025, 14:40 | 18000 | 18000 per 100 ml |
| 21 May 2025, 10:18 | 1700 | 1700 per 100 ml |
| 18 May 2025, 13:53 | 72 | 72 per 100 ml |
| 6 May 2025, 10:37 | 170 | 170 per 100 ml |
| 26 Jul 2024, 12:40 | 620 | 620 per 100 ml |
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 26 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Escherichia coli : Confirmed : MF 2348 | River water | 39 | Jul 2024 – Sep 2026 | 2000 per 100 ml 15 Sep 2026 |
| Escherichia coli : Confirmed : MF 2348 | Sea water | 20 | May 2024 – Sep 2024 | 45 per 100 ml 17 Sep 2024 |
| Bacteroides HF183 primer 5886 | River water | 5 | May 2025 – Jul 2026 | Present / 100ml 17 Jul 2026 |
| Bacteroidetes Marker : Human copy number 3820 | River water | 5 | May 2025 – Jul 2026 | 5 log (10) gene copies / 100ml 17 Jul 2026 |
| Bacteroidetes Marker : Ruminant 4906 | River water | 5 | May 2025 – Jul 2026 | Not found in test 17 Jul 2026 |
| Bacteroidetes Marker : Ruminant copy number 3819 | River water | 5 | May 2025 – Jul 2026 | below 2 log (10) gene copies / 100ml 17 Jul 2026 |
| Catellicoccus Marker : Seabird 3120 | River water | 5 | May 2025 – Jul 2026 | Not found 17 Jul 2026 |
| Catellicoccus Marker : Seabird Copy Number 3116 | River water | 5 | May 2025 – Jul 2026 | below 2 log (10) gene copies / 100ml 17 Jul 2026 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 39 | Jul 2024 – Sep 2026 | 260 colony forming units / 100ml 15 Sep 2026 |
| Microbial Source Tracking 4876 | River water | 5 | May 2025 – Jul 2026 | 1 text result 17 Jul 2026 |
| Mitochondrial Marker : Canine 4870 | River water | 5 | May 2025 – Jul 2026 | Not found 17 Jul 2026 |
| Mitochrondrial Marker: Canine copy number 3816 | River water | 5 | May 2025 – Jul 2026 | below 2 log (10) gene copies / 100ml 17 Jul 2026 |
| MST Filtration 4926 | River water | 40 | Jul 2024 – Sep 2026 | DNA Stored 15 Sep 2026 |
| Preparation: DNA 5923 | River water | 5 | May 2025 – Jul 2026 | Done 17 Jul 2026 |
| Volume of Sample Filtered 4865 | River water | 40 | Jul 2024 – Sep 2026 | 960 millilitre 15 Sep 2026 |
| Bacteroides HF183 primer 5886 | Sea water | 3 | Jun 2024 – Sep 2024 | Present / 100ml 5 Sep 2024 |
| Bacteroidetes Marker : Human copy number 3820 | Sea water | 3 | Jun 2024 – Sep 2024 | 4.6 log (10) gene copies / 100ml 5 Sep 2024 |
| Bacteroidetes Marker : Ruminant 4906 | Sea water | 3 | Jun 2024 – Sep 2024 | Present 5 Sep 2024 |
| Bacteroidetes Marker : Ruminant copy number 3819 | Sea water | 3 | Jun 2024 – Sep 2024 | 2.9 log (10) gene copies / 100ml 5 Sep 2024 |
| Enterococci: Intestinal: Presumptive: MF 3722 | Sea water | 20 | May 2024 – Sep 2024 | 18 colony forming units / 100ml 17 Sep 2024 |
| Microbial Source Tracking 4876 | Sea water | 3 | Jun 2024 – Sep 2024 | 1 text result 5 Sep 2024 |
| Mitochondrial Marker : Canine 4870 | Sea water | 3 | Jun 2024 – Sep 2024 | Present 5 Sep 2024 |
| Mitochrondrial Marker: Canine copy number 3816 | Sea water | 3 | Jun 2024 – Sep 2024 | 4.1 log (10) gene copies / 100ml 5 Sep 2024 |
| MST Filtration 4926 | Sea water | 20 | May 2024 – Sep 2024 | DNA Stored 17 Sep 2024 |
| Preparation: DNA 5923 | Sea water | 3 | Jun 2024 – Sep 2024 | Done 5 Sep 2024 |
| Volume of Sample Filtered 4865 | Sea water | 20 | May 2024 – Sep 2024 | 910 millilitre 17 Sep 2024 |
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.