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PLAN AND ASSESS: SEWAGE SPILLS |
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The data is showing that the number of SSO events are concentrated in Regions 2 and 5, between the two regions they account for 40% of the total size of collection systems with 77% of the total number of sewage spills. These two regions also have some of the larger collection systems in the State. The average spill volume though varies significantly around the State with Region 7 accounting for the largest average spill amount (65,656 gallons per spill) while having the lowest number of reported sanitary sewer overflows (SSO).
SSOs often contain high levels of suspended solids, pathogenic organisms, toxic pollutants, nutrients, oil, and grease. Typical consequences of SSOs include the closure of beaches and other recreational areas, inundated properties, and polluted rivers and streams. This measure tracks the reporting required by the Statewide Sanitary Sewer Order and will help to determine if the sewer system management plans (SSMP), also required by the order, are contributing to a reduction in the number of SSO events.
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