Combined Sewer Overflow

A Combined Sewer Overflow occurs when a combined sewer system carries more wastewater and stormwater than it can handle, causing untreated or partially treated flows to discharge to waterways. Within Combined Sewer Overflow, retention treatment and water quality impacts form part of the stable scope; coverage may also include environmental monitoring. A second angle on Combined Sewer Overflow can involve public health relevance and CSO event; where relevant, the same coverage may include sewage discharge. The scope of Combined Sewer Overflow can reach stormwater and sewage without losing its connection to combined sewer system.