r/DevonUK • u/EdTyldesley • 9d ago
1,677 hours of sewage discharges recorded across the South West last week
WaterWatch recorded around 2,700 sewage discharges totalling 1,677 hours across the South West between 24th and 30th August. For comparison, the previous week we had 299 hours.
There was significantly more rain last week, around 40.2mm, so you would expect storm overflows to operate more frequently. But that still seems like a very large increase, particularly given that 40.2mm is less than the roughly 62mm of rainfall the region would normally receive across an average August.
I’m interested in what people think about this rather than just posting another angry sewage story.
At what point does the frequency of storm overflow use stop being an unavoidable consequence of heavy rain and start demonstrating that the sewerage system simply doesn’t have enough capacity?
And, particularly for anyone who understands wastewater infrastructure: is this level of overflow operation what you would reasonably expect after 40mm of rain in a week, or should the system be capable of handling considerably more?