NPDES Compliance Monitoring

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IEC’s staff conducts inspections with sampling at industrial facilities and municipal wastewater treatment plants year-round. These inspections, which are coordinated with state agencies, include effluent sampling and an inspection of processes, equipment, and plant records. Samples collected at these facilities are analyzed in the IEC’s certified laboratory to determine compliance with the IEC’s Water Quality Regulations and with each facility’s specific National Pollutant Discharge Elimination Program (NPDES) permit. In many cases, IEC is the only agency performing effluent compliance monitoring at NPDES permitted discharges. Thus, IEC’s compliance monitoring is, in many cases, the only verification of data reported by permittees on discharge monitoring reports. The Commission reports results of inspections to the facility, the appropriate state environmental department, and the US EPA and enters findings into the EPA developed database, ICIS.