Environmental Management
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Lake Management Tools
The Wisconsin Lake Modeling Suite (WiLMS) model is a lake water quality-planning tool. The WiLMS model structure is organized into four principal parts: front-end, phosphorus prediction, internal loading and trophic response. Models WiLMS 3.3.18 (…
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Wisconsin Emissions Reduction Credit (ERC) Registry
The Wisconsin Emissions Reduction Credit (ERC) Registry assists facilities looking for emissions offsets to meet Nonattainment New Source Review (NNSR) permitting requirements. Facilities that voluntarily reduce emissions can use those reductions to…
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Lakes and Aquatic Invasive Species (AIS) Mapping Tool
In order to keep DNR servers up to date, DNR will be patching the GIS servers to the latest service level on the morning of Sunday, April 27. During this update, users may see unexpected issues with DNR’s web map viewers. We apologize in advance for…
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Wisconsin's Great Waters 2021 Photo Contest and Writing Project
The Office of Great Waters is pleased to present our 13th annual calendar, along with the winners and submissions from the 2021 Great Waters Photo Contest and Writing Project. As the calendar, photos and writings clearly show, the Great Lakes and…
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Non-Transient Non-Community Public Water System Sanitary Survey
A sanitary survey is an evaluation of a water system's facilities, operations and records to
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St. Croix SWCDA - Towns of Hudson and Warren
Many drinking water wells in the towns of Warren and Hudson, situated in St. Croix County, are contaminated with trichloroethylene (TCE), a volatile organic compound (VOC). A Special Well Casing Depth Area (St. Croix SWCDA - Towns of Hudson and…
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PFAS Contamination in Dane County
PFAS contamination has been detected throughout Dane County in soil, municipal wells, private wells, surface water and groundwater.Subscribe to updates about PFAS contamination in Wisconsin.Submit a question, comment or concern about PFAS in Dane…
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Consumption Advisories and PFAS
The DNR works closely with the Department of Health Services (DHS) to issue consumption advisories for per- and polyfluoroalkyl substances (PFAS) where and when necessary. Fish consumption advisories are based on guidance from the Great Lakes…
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Cybersecurity
Resources for public water systems to prepare for and prevent cyberattacksAmerican Water Works Association (AWWA)Water Sector Cybersecurity Risk Management Tool, to be used with America's Water Infrastructure Act (AWIA).Answer 22 yes/no questions…
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NR 811 Community Water System Operation and Design Updates
Safe, clean drinking water is what we expect when we turn on our faucets. Chapter NR 811, Wisconsin Administrative Code provides the engineering, design, construction and operation requirements for community water systems with the purpose of…