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Directory Results for National Pollutant Discharge Elimination System NPDES General Permits for Discharges from Potable Water Treatment Facilities The general permits for discharges from Potable Water Treatment Facilities PWTF and PWTFs for Massachusetts and of to NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM NPDES GENERAL PERMITS FOR NONCONTACT COOLING WATER DISCHARGES NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM NPDES GENERAL PERMITS FOR NONCONTACT COOLING WATER DISCHARGES - epa