Auditors
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Small Business Stationary Source
Effective August 8, 2021, 2021 Wisconsin Act 78 made several changes to the Wisconsin environmental compliance audit program (Enviro-Check) process. These changes more closely align Wisconsin's program with US EP's audit policies. The legislation…
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BOD Analysis
BOD provides a measure of the impact of a waste (water) on the oxygen content in a receiving water body. Wastes (organic matter, "food") are broken down (decomposed, oxidized, metabolized) by microbial organisms (aerobic bacteria), frequently…
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Nondiscrimination Policy and Procedures
The Wisconsin Department of Natural Resources (DNR) is committed to promoting diversity, fairness, equity and the principles of environmental justice. We also ensure we do not discriminate in our programs, decisions, actions or delivery of services.
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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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Audits and Approved Auditors
Green Tier participants are required to have their environmental management system audited at regular intervals. The frequency of audits that must be completed by a Green Tier Approved Auditor is determined by your participation level. This webpage…
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Choose a map
Maps help present information in a form that is more easily understood and meaningful to broad audiences. You can browse the mapping applications below for more specific information displayed in a map format. Many of these maps are interactive,…
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Department grant programs
The DNR administers many grant programs. Grants are monetary awards that do not have to be paid back.You can search for grant and reimbursement programs two different ways on this page.
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PFAS certification
The Wisconsin Department of Natural Resources is offering certification for PFAS in drinking water (potable water), aqueous (non-potable water), and non-aqueous matrices.Labs that currently hold WI DNR PFAS certification can be found here: WI PFAS…
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BOD Toxicity
Sample toxicity Often referred to as "sliding" BODs BOD decreases as sample volume increases (i.e., less dilute) Occurs frequently in systems receiving industrial waste Amounts to killing off (or severe shock to) "the bugs" Results in under-…