Monthly watchdog
Cornwall sewage report card
September 2026 — recorded storm-overflow activity across Cornwall.
1333
Spill events
293
Outfalls that spilled
-38%
vs previous month
2166
Previous month's events
In September 2026, Glanmor recorded 1333 storm-overflow spill events across Cornwall from 293 separate outfalls. That's 38% fewer than the previous month. Figures are from South West Water's near-real-time monitoring and may be revised.
Worst offenders in September 2026
| # | Outfall / receiving water | Spill events |
|---|---|---|
| 1 | RIVER KENSEY (S) | 45 |
| 2 | RIVER TORRIDGE | 32 |
| 3 | TRIBUTARY OF RIVER TORRIDGE(S) | 29 |
| 4 | RIVER KENSEY | 25 |
| 5 | FOWEY ESTUARY (E) | 23 |
| 6 | RIVER FOWEY ESTUARY (E) | 22 |
| 7 | PLYMOUTH SOUND (C) | 19 |
| 8 | RIVER FOWEY ESTUARY(E) | 19 |
| 9 | LOOE RIVER (HARBOUR) (E) | 19 |
| 10 | BUDE BAY (ATLANTIC OCEAN) | 18 |
See the worst-polluters leaderboard for annual totals, or download the data.
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