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The DNR regulates municipal and industrial operations discharging wastewater to surface water or groundwater through the Wisconsin Pollutant Discharge Elimination System (WPDES) permit program. Plans for wastewater treatment facilities must be reviewed and approved by the DNR. State law requires DNR review of municipal and industrial treatment plant construction plans as well as related monitoring systems and groundwater monitoring wells.


A listing of Wisconsin Pollutant Discharge Elimination System (WPDES) permits.

Public Notices

Review the latest WPDES discharge public notices. Notices are posted on the DNR website for 30 days.


Access the Wastewater program’s most frequently requested municipal and industrial discharge materials.

Operator Certification

Do you operate a wastewater treatment plant? Find training opportunities and certification and licensing information.