Receiving watercourse
Portsmouth Harbour
29 monitored storm overflows on the Portsmouth Harbour are listed in the National Storm Overflow Hub. Operated by Southern Water.
29
Storm overflows
0
Active right now
0
Monitors offline
78
Spill events · 12 months
83h
Recorded discharge · 12 months
1
Open discrepancies
Every monitored overflow· 29
Each links to its full record — spill history, nearby water-quality sampling, citizen reports, and pre-filled accountability letters.
- SWS00376Southern Waterinactive
- SWS00608Southern Waterinactive
- SWS00374Southern Waterinactive
- SWS00664Southern Waterinactive
- SWS00945Southern Waterinactive
- SWS00566Southern Waterinactive
- SWS00211Southern Waterinactive
- SWS00974Southern Waterinactive
- SWS00095Southern Waterinactive
- SWS00687Southern Waterinactive
- SWS00092Southern Waterinactive
- SWS00946Southern Waterinactive
- SWS00731Southern Waterinactive
- SWS00300Southern Waterinactive
- SWS00377Southern Waterinactive
- SWS90049Southern Waterinactive
- SWS00439Southern Waterinactive
- SWS00732Southern Waterinactive
- SWS00398Southern Waterinactive
- SWS00565Southern Waterinactive
- SWS00194Southern Waterinactive
- SWS00378Southern Waterinactive
- SWS00397Southern Waterinactive
- SWS00379Southern Waterinactive
- SWS00859Southern Waterinactive
- SWS90055Southern Waterinactive
- SWS00589Southern Waterinactive
- SWS90068Southern Waterinactive
- SWS00135Southern Waterinactive
Seen something?
Sewage debris, foam, dead fish — citizen sightings are cross-referenced against the official discharge data above and strengthen the public record.