Cornwall water data & downloads

Everything Glanmor collects, refreshed daily from public sources + citizen reports. Updated just now.

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Beaches (CSV)Beaches (JSON)Spill events (CSV)Official samples (CSV)Reports & signals (JSON)

Open data under the originating licences (see sources). Please attribute Glanmor and the original source. For bulk extracts or an API, get in touch.

90
Beaches
9,319
EA samples (7 yrs)
604
Outfalls
8,101
Overflow events
19,029
Rainfall readings
254,769
Tide readings
10,719
Data signals
0
Citizen reports

Storm-overflow spills per year (Cornwall, EDM)

Overflow events per month (last 12 months)

Bathing-water classifications by year (Cornwall)

Environment Agency annual classifications for all 90 designated bathing waters.

Samples with high bacteria, by year (Cornwall)

Share of EA samples at or above 500 E. coli or 200 enterococci cfu/100ml.

Most spills in 2025 (EDM)

  1. 198 spills — TOWN QUAY PUMPING STATION
  2. 167 spills — ST NEOT STW
  3. 165 spills — ALTARNUN STW
  4. 164 spills — HAREWOOD ROAD CSO
  5. 159 spills — CHACEWATER STW
  6. 153 spills — 39 ST MICHAELS COMBINED SEWER OF
  7. 148 spills — DELABOLE WASTEWATER TREATMENT WORKS
  8. 147 spills — PRAZE AN BEEBLE STW
  9. 141 spills — GWENNAP WASTEWATER TREATMENT WORKS
  10. 134 spills — BRIDGE PS / CSO / EO

Recent overflow events (14d)

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