Business
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County Resources
County participation in the multi-discharger variance (MDV) for phosphorus is completely voluntary. If counties participate, they agree to comply with the requirements of the program to the best of their ability. By participating in the MDV,…
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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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Help With Online Monitoring Report Forms
Wams ID Replaced by MyWisconsin IDOn September 3, 2025, the Wisconsin Access Management System (WAMS) login platform used for wastewater/septage reporting on switchboard switched to a new login system called MyWisconsin ID.Attention: Any users who…
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WPDES Permit e-Application submittals
The DNR requires electronic submittal of WPDES permit applications (eApplication). Permit applicants use the DNR Switchboard to access the eApplication.MyWisconsin IDThe DNR Switchboard helps people find DNR electronic forms with their MyWisconsin…
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Additives
The term additives is used to describe products that are either water-applied or land-applied in order to perform some water treatment purpose. Additives can come in a variety of chemical formulations including, but not limited to: chemical salts,…
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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 Permits. The proposed third edition…
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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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Additional sources of WET program information
EPA WET Test Methods and toxicity information Test methods designed specifically for measuring whole effluent toxicity (WET) have been codified at 40 CFR part 136 [60 FR 53529; Oct. 16, 1995]. Three EPA WET Methods Manuals (two freshwater…
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Consultants with TRE experience in Wisconsin
A toxicity reduction evaluation (TRE) is a study intended to determine those actions necessary to remove toxicity. A TRE may identify a simple solution such as improved housekeeping procedures or require a more extensive investigation to identify…
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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…