Bristol rivers dashboard latest – good news and bad news!
Although data from water companies reveals far fewer sewage spills into the Trym last year and Combined Sewer Overflows were down 38%, other measures show all is not well.
Water Quality
Good news about Combined Sewer Overflows
Years of Trout in the Trym reaching out to Wessex Water, including walking them along the river to show what we’re doing, are bearing fruit at last.
Outfall safari
Peter and Mike check 15 outfalls along the Hazel Brook with mixed results.
Riverfly sampling update
This was the last riverfly sampling of 2025. See how the results compare with the yearly averages since 2021.
Excellent news – ten Combined Sewer Overflows to be upgraded
Company five year plans show that Wessex Water will upgrade ten Combined Sewer Overflows (CSOs) affecting the River Trym by the end of 2030.
Festival of Nature – River Restoration Walk
Peter Coleman-Smith reports on this guided walk which was interesting and enjoyable – despite the yellow weather warning!
Interesting river fly sample at Cribbs Causeway
Peter Coleman-Smith reports that he took a very interesting river fly sample at Cribbs Causeway yesterday morning.
Combined Sewer Overflow data
The latest Combined Sewer Overflow data shows a slight improvement in the Trym in 2024 vs 2023 but there was still 1,328 hours of spilling of untreated waste water.
Young eel spotted at Westbury Wildlife Park
Westbury Wildlife Park recently demonstrated riverfly monitoring to some visitors, showing them what lives in the River Trym.