Daymer Bay water quality
AMBERdesignated bathing water · · South West Water
Daymer Bay is a designated bathing water in Cornwall, currently rated AMBER for swimming — 15 mm rain in 48h (this beach's threshold is 12 mm) — runoff and overflows more likely. Its latest Environment Agency classification is excellent (2025), and 115 storm-overflow spills were recorded nearby in 2025. Below: live risk, recent spills, official samples, rainfall, tides and nearby reports.
Current status
Risk: AMBER 15 mm rain in 48h (this beach's threshold is 12 mm) — runoff and overflows more likely.
- Active overflows nearby: 0
- Recent overflows (48h): 0
- Rainfall (48h): 15.1 mm
Official EA classification
excellent (2025)
Latest official sample
2026-08-19 — E.coli 18, enterococci 10 cfu/100ml
Latest independent sample
None published
Pollution & environment data
Recent storm overflows nearby (30 days)
No spills recorded within 5 km in the last 30 days.
In the news nearby
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
- South West Water owner says firm must rebuild trust after parasite outbreak · 2026-06-10
Storm-overflow spills near here, by year (EDM)
Recent spills near here (precise, SWW)
- spill, 2 min2026-07-18 · ~2.7 km
- spill, 0 min2026-07-18 · ~2.7 km
- spill, 0 min2026-07-18 · ~2.7 km
- spill, 2 min2026-07-16 · ~2.0 km
- spill, 9 min2026-07-01 · ~4.5 km
- spill, 2 min2026-06-25 · ~2.3 km
- spill, 2 min2026-06-25 · ~2.3 km
- spill, 2 min2026-06-25 · ~2.9 km
Full spill history near Daymer Bay
Download CSVEvery storm-overflow discharge Glanmor has recorded within 5 km of Daymer Bay, newest first.
12 discharge events
| Start | End | Outfall | Distance |
|---|---|---|---|
| 2026-07-18 15:44 | 2026-07-18 15:47 | RIVER CAMEL ESTUARY (E) | ~2.7 km |
| 2026-07-18 14:45 | 2026-07-18 17:15 | RIVER CAMEL ESTUARY (E) | ~2.7 km |
| 2026-07-16 00:29 | 2026-07-16 00:31 | CAMEL ESTUARY (E) | ~2.0 km |
| 2026-07-01 09:00 | 2026-07-01 09:08 | TREVONE BAY | ~4.5 km |
| 2026-06-25 09:48 | 2026-06-25 09:50 | CAMEL ESTUARY (E) | ~2.3 km |
| 2026-06-25 09:09 | 2026-06-25 09:11 | CAMEL ESTUARY (E) | ~2.9 km |
| 2026-06-18 12:40 | 2026-06-18 12:41 | (S) POLZEATH STREAM | ~3.1 km |
| 2026-06-18 09:03 | 2026-06-18 09:08 | RIVER CAMEL ESTUARY (E) | ~2.7 km |
| 2026-06-15 10:12 | 2026-06-15 10:13 | CAMEL ESTUARY (E) | ~2.0 km |
| 2026-06-08 08:36 | 2026-06-08 08:37 | CAMEL ESTUARY (E) | ~2.3 km |
| 2026-03-02 14:43 | 2026-03-03 01:13 | TREVONE BAY | ~4.5 km |
| 2026-02-27 22:19 | 2026-02-27 22:57 | (E) POLZEATH BAY | ~2.1 km |
25 precise spill records (duration & volume)
| When | Detail | Distance |
|---|---|---|
| 2026-07-18 15:44 | spill, 2 min | ~2.7 km |
| 2026-07-18 14:43 | spill, 0 min | ~2.7 km |
| 2026-07-18 14:36 | spill, 0 min | ~2.7 km |
| 2026-07-16 00:29 | spill, 2 min | ~2.0 km |
| 2026-07-01 09:00 | spill, 9 min | ~4.5 km |
| 2026-06-25 09:48 | spill, 2 min | ~2.3 km |
| 2026-06-25 09:48 | spill, 2 min | ~2.3 km |
| 2026-06-25 09:09 | spill, 2 min | ~2.9 km |
| 2026-06-25 09:09 | spill, 2 min | ~2.9 km |
| 2026-06-18 12:40 | spill, 1 min | ~3.1 km |
| 2026-06-18 12:40 | spill, 1 min | ~3.1 km |
| 2026-06-18 09:03 | spill, 5 min | ~2.7 km |
| 2026-06-18 09:03 | spill, 5 min | ~2.7 km |
| 2026-06-15 10:12 | spill, 1 min | ~2.0 km |
| 2026-06-15 10:12 | spill, 1 min | ~2.0 km |
| 2026-06-08 08:36 | spill, 1 min | ~2.3 km |
| 2026-06-08 08:36 | spill, 1 min | ~2.3 km |
| 2026-05-20 10:55 | spill, 3 min | ~1.5 km |
| 2026-05-20 10:55 | spill, 3 min | ~1.5 km |
| 2026-03-30 10:37 | spill, 25 min | ~2.1 km |
| 2026-03-30 10:37 | spill, 25 min | ~2.1 km |
| 2026-03-02 14:43 | spill, 630 min | ~4.5 km |
| 2026-03-02 14:43 | spill, 630 min | ~4.5 km |
| 2026-02-27 22:19 | spill, 38 min | ~2.1 km |
| 2026-02-27 22:19 | spill, 38 min | ~2.1 km |
Water quality — 7-year trend
Water quality worsened in 2026: average E. coli was 23% higher than 2025.
| Year | EA classification | Samples | E. coli (geo-mean) | Enterococci (geo-mean) | High readings |
|---|---|---|---|---|---|
| 2019 | — | 12 | 13 cfu/100ml | 15 cfu/100ml | 0 |
| 2020 | — | 3 | 12 cfu/100ml | 10 cfu/100ml | 0 |
| 2021 | — | 20 | 14 cfu/100ml | 11 cfu/100ml | 1 of 20 |
| 2022 | — | 20 | 13 cfu/100ml | 14 cfu/100ml | 0 |
| 2023 | — | 20 | 14 cfu/100ml | 16 cfu/100ml | 0 |
| 2024 | — | 20 | 12 cfu/100ml | 14 cfu/100ml | 1 of 20 |
| 2025 | excellent | 15 | 14 cfu/100ml | 13 cfu/100ml | 0 |
| 2026 | — | 8 | 17 cfu/100ml | 13 cfu/100ml | 0 |
Geometric mean of Environment Agency samples per calendar year (the standard bathing-water statistic). "High readings" are samples at or above 500 E. coli or 200 enterococci cfu/100ml.
Daymer Bay — frequently asked questions
Is it safe to swim at Daymer Bay today?
Daymer Bay is currently rated AMBER: 15 mm rain in 48h (this beach's threshold is 12 mm) — runoff and overflows more likely. This is guidance only — also check official alerts and use your judgement.
Has there been a sewage spill near Daymer Bay?
115 storm-overflow spills were recorded near Daymer Bay in 2025 (EA Event Duration Monitoring), and 12 spill events have been logged nearby so far this year.
What is Daymer Bay's bathing water classification?
Daymer Bay is classified excellent for 2025 by the Environment Agency.
Data & provenance
- Last updated
- 12 min ago (2026-08-27 19:30 UTC)
- Sources
- Environment Agency (samples & classification), South West Water (overflows), EA EDM (annual spills), Open-Meteo (rainfall & tide). Full list on about.
- Confidence
- High — official classification, 8 outfalls monitored within 5 km.
- Risk model
- v0.4
- Download
- Sample timeline (JSON) · All beaches (CSV)
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