Regulations
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Exams
Wisconsin DNR's Operator Certification program will be hosting in-person paper exams coordinated and facilitated by Wisconsin DNR staff in 2026.Exams will be held approximately three times a month, every other month. All 2026 exam dates and…
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Information for private well owners
Private wells are wells that are not part of a public water supply. Private wells have fewer than 15 connections and serve fewer than 25 people. They are usually wells that serve a single home or farmhouse. Unlike public water systems, protection…
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Information for drillers and pump installers
This page contains information and resources for well drillers, heat exchange drillers and pump installers. NewsBitsArchives of NewsBits - an electronic newsletter for Wisconsin drillers and installers.Well driller viewer
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Tools for Adaptive Management and Water Quality Trading
Subscribe to phosphorus rule updatesThe following resources may assist you in developing adaptive management and water quality trading plans.
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Statewide Phosphorus Multi-Discharger Variance
Eligibility County resources Implementation -->The multi-discharger…
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Wisconsin's Phosphorus Rule
Statewide phosphorus multi-discharger variance -->OverviewPhosphorus has long been recognized as the controlling factor in plant and algae growth in Wisconsin lakes and streams.
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Wisconsin's Water Quality Trading
Project MapsFind adaptive management and water quality trading projects around the state. Important Update: The department has released an updated version of Guidance for Implementing Water Quality Trading in WPDES…
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Wastewater State Statutes and Codes
The following list highlights the Wisconsin state statutes and administrative codes most applicable to the wastewater program. All state statutes and administrative codes can be found online in the Wisconsin State Legislature document registry [exit…
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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…