Municipalities
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Groundwater Retrieval Network (GRN)
The following are terms used in the Groundwater Retrieval Network (GRN).
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The Groundwater Retrieval Network
The Groundwater Retrieval Network (GRN) reports well information and well sample result data from several DNR databases. GRN can help you find information about an individual well or analyze regional or statewide groundwater conditions.
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Current groundwater standards
Current public health and public welfare groundwater standards are contained in Ch. NR 140, Wis. Adm. Code.
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Air Permit Search
Notice: Update personal bookmarks to the new link for the button below. Air Permit Search
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Air Program Publications, Guidance and Policy
Policy, procedural and technical guidance related to the Air Program can be found using the portal below. The portal works best in a modern web browser, such as Chrome or Edge.Questions about specific guidance can be directed to Ron Binzley or Maria…
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Air Permit Options
Air permits limit the amount of air pollution a facility is allowed to emit to keep the air clean and healthy. Individual permits are customized to promote environmental compliance and provide a basis for legal enforcement if permit conditions are…
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Permitting Requirements for Nonattainment Areas in Wisconsin
Areas that currently are or have been designated as being in "nonattainment" of a national ambient air quality standard (NAAQS) have more restrictive permitting requirements, and sources in those areas may be subject to more stringent regulations…
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Air Dispersion Modeling
Air dispersion modeling simulates how air pollutants disperse in the atmosphere. Inputs to the model include emissions, stack parameters, meteorological data, terrain and the height of surrounding structures. Dispersion modeling is performed with…
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Air Permits Glossary
This glossary provides plain English, nontechnical definitions of terms frequently used in the DNR's Air Management Program related to air permits. Please refer to the Wisconsin Administrative Code [exit DNR] and Code of Federal Register [exit DNR]…
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Prevention of Significant Deterioration (PSD) Class I Areas
Class I areas receive extra protection from the impacts of air pollution. The classification was established under the Clean Air Act prevention of significant deterioration (PSD) program to limit the amount of additional pollution to these areas…