Severn Trent provide live data for Combined Sewage Overflow (CSO's) in the Trent Catchment. This data can help inform water quality for HPP. It's important to understand the limitations of this data - it does not include information about the volume of spills - just if a CSO is releasing or not. This also doesn't give any information about sources of pollution that are part of Severn Trent's system - agricultural runoff, unregulated systems etc.
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