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WET laboratory certification
All laboratories performing WET testing for WPDES permit compliance are required to be certified or registered under ch. NR 149, Wis. Adm. Code. Because high quality data is important when making sound environmental decisions, the laboratory…
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The Whole Effluent Toxicity (WET) Program
Whole effluent toxicity (WET) tests are used, in addition to chemical-specific testing, to measure, predict and control the discharge of materials that may be harmful to aquatic life. Recognizing that no single test or organism can be expected to…
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Plan Review Procedures for Large Septage Storage Facilities
OverviewSeptage is defined as the wastewater or contents of septic tanks, holding tanks, dosing chambers, grease interceptors, seepage beds, seepage pits, seepage trenches, privies or portable restrooms (reference s. NR 113.03(55), Wis. Adm. Code).…
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Regulation of Wastewater Discharges
In 1972, the United States Congress passed the Federal Water Act. The law authorized the U.S. EPA to delegate certain water pollution control responsibilities to any state that could demonstrate the necessary levels of expertise and authority to…
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Sewer Service Area Planning Agencies
The following agencies conduct sewer service area planning for the areas indicated. These agencies also review proposed sewer extensions and provide Sewer Service Area Conformance letters (also known as Water Quality Management letters). Links to…
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WPDES Permits on Public Notice
Public notices are required by law to alert interested members of the public of the DNR's intention to authorize a Wisconsin Pollutant Discharge Elimination System (WPDES) discharge to a water of the state. The notices are posted here on the DNR…
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Guidance for a large Private Onsite Wastewater Treatment System (POWTS) for domestic wastewater Preliminary Design Report
It is recommended that a Preliminary Design Report be prepared and submitted to the DNR and the Department of Safety and Professional Services for a project proposal involving a large Private Onsite Wastewater Treatment System (POWTS) that will…
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Wastewater permits staff
Choose the region in which your facility/site/municipality is located on the map below for regional wastewater staff listings. Click on the staff name to see their specialty areas, counties served and contact information.Staff located in the Madison…
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WPDES Permits
The DNR regulates the discharge of pollutants to waters of the state through the Wisconsin Pollutant Discharge Elimination System (WPDES) program. Wastewater permits contain all the monitoring requirements, special reports and compliance schedules…