4 Sanitary Sewer Overfiows (SSOs)
The City of Nashua is authorized to discharge from the Nashua Wastewater Treatment Facility and nine
combined sewer overflows (CSOs) to the receiving waters of Merrimack River (Wastewater Treatment
Facility (Outfall 001) and CSOs (Outfalls 002-005 and 014)) and Nashua River (CSOs (Outfalls 006-009)
under the Nashua Wastewater Treatment Facility NPDES Permit No. NH0100170. Under Section E.6
(g) of NPDES Permit No. NH0100170, SSOs are tracked and reported, pursuant to NH MS4 General
Permit Section 2.3.4.4(d). A summary of the SSOs and their causes, and a report of any corrective
actions taken as a result, are reported in the annual report related to the implementation of the
Collection System O&M Plan, submitted to EPA and New Hampshire Department of Environmental
Services (NHDES) under NPDES Permit No. NH0100170.
Hic it Discharge Detection and Himination Plan 8
