Downderry water quality

RED

designated bathing water · · South West Water

Downderry is a designated bathing water in Cornwall, currently rated RED for swimming — Storm overflow discharging within 5 km right now. Incoming/high tide may carry discharge closer to shore. Its latest Environment Agency classification is excellent (2025), and 224 storm-overflow spills were recorded nearby in 2025. Below: live risk, recent spills, official samples, rainfall, tides and nearby reports.

Safe to swim right now?
Avoid — pollution risk
Storm overflow discharging within 5 km right now. Incoming/high tide may carry discharge closer to shore.
South West Water status: Amber · since 2026-10-24 13:39
Do not rely solely on this website for health decisions. Check official alerts and use your own judgement. Seek medical advice if you are unwell.

Current status

Risk: RED Storm overflow discharging within 5 km right now. Incoming/high tide may carry discharge closer to shore.

  • Active overflows nearby: 3
  • Recent overflows (48h): 13
  • Rainfall (48h): 51.4 mm

Official EA classification

excellent (2025)

Latest official sample

2026-09-17 — E.coli 10, enterococci 10 cfu/100ml

Latest independent sample

None published

Pollution & environment data

51.4 mm
Rainfall 48h
85.5 mm
Rainfall 7d
6
Outfalls within 5 km
224
Spills (2025, official)
48
Spills 2026 so far (live)
26
Spills last 30d
high 1.84m
Tide now

Recent storm overflows nearby (30 days)

In the news nearby

No recent local news matched.

Storm-overflow spills near here, by year (EDM)

Recent spills near here (precise, SWW)

Full spill history near Downderry

Download CSV

Every storm-overflow discharge Glanmor has recorded within 5 km of Downderry, newest first.

48 discharge events
StartEndOutfallDistance
2026-10-24 14:012026-10-24 14:15WHITSAND BAY (C)~4.7 km
2026-10-24 13:45ongoingENGLISH CHANNEL~0.6 km
2026-10-24 13:402026-10-24 13:59WHITSAND BAY (C)~4.7 km
2026-10-24 13:242026-10-24 16:47ENGLISH CHANNEL~0.6 km
2026-10-24 13:01ongoingENGLISH CHANNEL~1.3 km
2026-10-24 12:33ongoingENGLISH CHANNEL~1.3 km
2026-10-24 11:452026-10-24 15:30LOOE BAY (C)~5.0 km
2026-10-24 11:282026-10-24 15:16LOOE BAY (C)~5.0 km
2026-10-23 07:302026-10-23 07:45LOOE BAY (C)~5.0 km
2026-10-23 06:592026-10-23 07:29LOOE BAY (C)~5.0 km
2026-10-23 06:462026-10-23 06:53LOOE BAY (C)~5.0 km
2026-10-23 05:432026-10-23 05:45POLBATHIC STREAM(S)~4.5 km
2026-10-23 02:002026-10-23 02:15TRIBUTARY OF RIVER SEATON~4.5 km
2026-10-23 01:462026-10-23 01:52TRIBUTARY OF RIVER SEATON~4.5 km
2026-10-23 01:402026-10-23 01:43POLBATHIC STREAM(S)~4.5 km
2026-10-22 20:352026-10-22 20:39POLBATHIC STREAM(S)~4.5 km
2026-10-21 02:152026-10-21 02:30LOOE BAY (C)~5.0 km
2026-10-21 01:522026-10-21 02:15LOOE BAY (C)~5.0 km
2026-10-15 22:302026-10-15 22:45LOOE BAY (C)~5.0 km
2026-10-15 22:032026-10-15 22:26LOOE BAY (C)~5.0 km
2026-10-14 11:152026-10-14 11:30TRIBUTARY OF RIVER SEATON~4.5 km
2026-10-14 11:072026-10-14 11:09TRIBUTARY OF RIVER SEATON~4.5 km
2026-10-06 11:282026-10-06 11:29TRIBUTARY OF RIVER SEATON~4.5 km
2026-10-01 11:012026-10-01 11:03ENGLISH CHANNEL~0.6 km
2026-09-29 22:152026-09-29 22:30LOOE BAY (C)~5.0 km
2026-09-29 21:482026-09-29 22:14LOOE BAY (C)~5.0 km
2026-08-30 15:032026-08-30 15:08LOOE BAY (C)~5.0 km
2026-08-30 14:452026-08-30 15:30LOOE BAY (C)~5.0 km
2026-08-30 14:452026-08-30 15:15TRIBUTARY OF RIVER SEATON~4.5 km
2026-08-30 14:362026-08-30 14:58TRIBUTARY OF RIVER SEATON~4.5 km
2026-08-30 13:342026-08-30 13:50LOOE BAY (C)~5.0 km
2026-08-30 13:302026-08-30 14:15LOOE BAY (C)~5.0 km
2026-08-30 13:302026-08-30 13:45TRIBUTARY OF RIVER SEATON~4.5 km
2026-08-29 09:452026-08-29 10:00TRIBUTARY OF RIVER SEATON~4.5 km
2026-08-29 09:232026-08-29 09:48TRIBUTARY OF RIVER SEATON~4.5 km
2026-08-29 09:202026-08-29 09:42LOOE BAY (C)~5.0 km
2026-08-29 05:302026-08-29 05:45TRIBUTARY OF RIVER SEATON~4.5 km
2026-08-29 04:302026-08-29 06:30LOOE BAY (C)~5.0 km
2026-08-29 04:302026-08-29 05:15TRIBUTARY OF RIVER SEATON~4.5 km
2026-07-24 10:452026-07-24 12:15ENGLISH CHANNEL~0.6 km
2026-07-24 10:342026-07-24 12:00ENGLISH CHANNEL~0.6 km
2026-07-15 18:052026-07-15 18:06POLBATHIC STREAM(S)~4.5 km
2026-06-25 19:212026-06-25 19:26TRIBUTARY OF RIVER SEATON~4.5 km
2026-06-25 19:162026-06-25 19:43LOOE BAY (C)~5.0 km
2026-05-28 21:152026-05-28 21:16POLBATHIC STREAM(S)~4.5 km
2026-04-21 09:592026-04-21 10:03ENGLISH CHANNEL~1.3 km
2026-04-14 11:232026-04-14 11:36ENGLISH CHANNEL~0.6 km
2026-02-18 15:542026-02-18 16:59WHITSAND BAY (C)~4.7 km
41 precise spill records (duration & volume)
WhenDetailDistance
2026-10-24 13:40spill, 18 min~4.7 km
2026-10-24 13:24spill, 187 min~0.6 km
2026-10-24 12:33spill, 236 min~1.3 km
2026-10-24 11:28spill, 211 min, ~69 m³~5.0 km
2026-10-23 06:59spill, 30 min, ~1 m³~5.0 km
2026-10-23 06:46spill, 7 min, ~0 m³~5.0 km
2026-10-23 05:43spill, 3 min~4.5 km
2026-10-23 01:46spill, 7 min~4.5 km
2026-10-23 01:40spill, 3 min~4.5 km
2026-10-22 20:35spill, 3 min~4.5 km
2026-10-21 01:52spill, 23 min, ~1 m³~5.0 km
2026-10-15 22:03spill, 23 min, ~1 m³~5.0 km
2026-10-14 11:07spill, 1 min~4.5 km
2026-10-14 10:27spill, 1 min~4.5 km
2026-10-06 11:28spill, 2 min~4.5 km
2026-10-06 11:06spill, 0 min~4.5 km
2026-10-01 11:01spill, 2 min~0.6 km
2026-09-29 21:48spill, 26 min, ~1 m³~5.0 km
2026-08-30 15:03spill, 5 min, ~0 m³~5.0 km
2026-08-30 14:36spill, 22 min~4.5 km
2026-08-30 14:33spill, 11 min~5.0 km
2026-08-30 13:34spill, 16 min, ~0 m³~5.0 km
2026-08-30 13:17spill, 0 min~5.0 km
2026-08-30 13:16spill, 12 min~4.5 km
2026-08-30 12:56spill, 11 min~4.5 km
2026-08-29 09:23spill, 24 min~4.5 km
2026-08-29 09:20spill, 22 min, ~1 m³~5.0 km
2026-07-24 10:34spill, 58 min~0.6 km
2026-07-15 18:05spill, 2 min~4.5 km
2026-06-25 19:21spill, 6 min~4.5 km
2026-06-25 19:21spill, 6 min~4.5 km
2026-06-25 19:16spill, 27 min, ~1 m³~5.0 km
2026-06-25 19:16spill, 27 min, ~1 m³~5.0 km
2026-05-28 21:15spill, 2 min~4.5 km
2026-05-28 21:15spill, 2 min~4.5 km
2026-04-21 09:59spill, 3 min~1.3 km
2026-04-21 09:59spill, 3 min~1.3 km
2026-04-14 11:23spill, 13 min~0.6 km
2026-04-14 11:23spill, 13 min~0.6 km
2026-02-18 15:54spill, 65 min~4.7 km
2026-02-18 15:54spill, 65 min~4.7 km
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Water quality — 7-year trend

Water quality in 2026 was broadly level with 2025.

YearEA classificationSamplesE. coli (geo-mean)Enterococci (geo-mean)High readings
2019—1315 cfu/100ml13 cfu/100ml0
2020—310 cfu/100ml12 cfu/100ml0
2021—2021 cfu/100ml21 cfu/100ml2 of 20
2022—2013 cfu/100ml11 cfu/100ml0
2023—2011 cfu/100ml11 cfu/100ml0
2024—1513 cfu/100ml10 cfu/100ml0
2025excellent1011 cfu/100ml11 cfu/100ml0
2026—1011 cfu/100ml11 cfu/100ml0

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.

Downderry — frequently asked questions

Is it safe to swim at Downderry today?

Downderry is currently rated RED: Storm overflow discharging within 5 km right now. Incoming/high tide may carry discharge closer to shore. This is guidance only — also check official alerts and use your judgement.

Has there been a sewage spill near Downderry?

224 storm-overflow spills were recorded near Downderry in 2025 (EA Event Duration Monitoring), and 48 spill events have been logged nearby so far this year.

What is Downderry's bathing water classification?

Downderry is classified excellent for 2025 by the Environment Agency.

Data & provenance

Last updated
9 min ago (2026-10-24 16:45 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, 6 outfalls monitored within 5 km.
Risk model
v0.4
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Sample timeline (JSON) · All beaches (CSV)
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