Monthly watchdog
Cornwall sewage report card
June 2026 — recorded storm-overflow activity across Cornwall.
300
Spill events this month
284
Outfalls that spilled
+348%
vs last month
67
Last month's events
In June 2026, Glanmor recorded 300 storm-overflow spill events across Cornwall from 284 separate outfalls. That's 348% more than the previous month. Figures are from South West Water's near-real-time monitoring and may be revised.
Worst offenders this month
| # | Outfall / receiving water | Spill events |
|---|---|---|
| 1 | STONEHOUSE CREEK VIA SWS (EST) | 5 |
| 2 | ATLANTIC OCEAN | 3 |
| 3 | RIVER SEATON (S) | 3 |
| 4 | RIVER KENSEY (S) | 3 |
| 5 | ST LAWRENCE STREAM | 2 |
| 6 | RIVER LEW | 2 |
| 7 | RIVER TORRIDGE | 2 |
| 8 | RIVER KENSEY | 2 |
| 9 | RIVER INNY (S) | 2 |
| 10 | (S) WEEK BROOK | 2 |
See the 2025 worst-polluters leaderboard for annual totals, or download the data.
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