Monthly watchdog
Cornwall sewage report card
July 2026 — recorded storm-overflow activity across Cornwall.
641
Spill events
120
Outfalls that spilled
+90%
vs previous month
337
Previous month's events
In July 2026, Glanmor recorded 641 storm-overflow spill events across Cornwall from 120 separate outfalls. That's 90% more than the previous month. Figures are from South West Water's near-real-time monitoring and may be revised.
Worst offenders in July 2026
| # | Outfall / receiving water | Spill events |
|---|---|---|
| 1 | STONEHOUSE CREEK VIA SWS (EST) | 113 |
| 2 | TRIB OF PENRYN RIVER(S) | 49 |
| 3 | RIVER TORRIDGE | 27 |
| 4 | WESTON MILL LAKE(E) | 26 |
| 5 | RIVER KENWYN[S] | 20 |
| 6 | RIVER INNY (S) | 17 |
| 7 | FOWEY ESTUARY (E) | 16 |
| 8 | RIVER FOWEY ESTUARY(E) | 15 |
| 9 | LOOE RIVER (HARBOUR) (E) | 15 |
| 10 | RIVER FOWEY ESTUARY (E) | 15 |
See the worst-polluters leaderboard for annual totals, or download the data.
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