Sewage spills in Plymouth
Includes overflow assets operated by South West Water within 5 km of the town centre.
Total spills
2,499
Duration
11,947hrs
Infrastructure
93
Based on the latest Environment Agency storm overflow data
What does 11,947 hours mean?
Combined across all 93 sites in Plymouth, that is equivalent to sewage being discharged continuously for 497.8 days non-stop into local waterways (if all reported hours ran back-to-back). In practice, spills are separate events spread across the year.
Top 10 sites by spill count
Sites by severity
93sites
- Critical (>100 spills)6
- High (50–100 spills)11
- Moderate (10–49 spills)40
- Low (<10 spills)36
Site details
Counts use the EA 12–24 hour reporting method for the most recent year with spills, per site. Environment Agency EDM dataset.
| Site name | Water company | Spill count | Duration (hours) |
|---|---|---|---|
| Plymouth Central STW | South West Water | 127 | 1,063 |
| Efford Marsh CSO | South West Water | 110 | 2,130 |
| Laira Park CSO | South West Water | 103 | 424 |
| Ps-Dy2, North Yard, Devonport | South West Water | 103 | 1,021 |
| Forder Valley Road CSO | South West Water | 102 | 1,432 |
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