Statewide Phosphorus Multi-Discharger Variance
The multi-discharger variance (MDV) for phosphorus extends the timeline for complying with low-level phosphorus limits. In exchange, point sources commit to step-wise reductions of phosphorus within their effluent as well as helping to address nonpoint sources of phosphorus from farm fields, cities or natural areas to implement projects designed to improve water quality. The MDV is similar to an individual variance. However, multiple point sources can be covered under the MDV, whereas an individual variance only applies to a single facility. This provides for administrative streamlining and maximizes the potential benefits watershed projects may have through the variance program. The MDV factsheet [PDF] provides general information regarding this program. The DNR's Program Policy for Implementing Wisconsin's Multi-Discharger Variance [PDF] provides details about eligibility and implementation requirements for this program.
Wisconsin's phosphorus MDV was approved by EPA on Feb. 6, 2017. The following documents were provided to the EPA to justify and provide the implementation strategy for the MDV.
- Variance package submitted to EPA
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Tier 1
- Wisconsin's Final Economic Determination
- Phosphorus Economic Impact Analysis Report and Addendum
- MDV Justification Document
- Response to Comments on MDV Package
- MDV Implementation Guidance
- Draft Implementation Forms
- State Statute 283.16 and Act 205
- Legal Certification Letter
- Crosswalk Table
- Wis. Adm. Code s. NR 102.06
Tier 2
- Public Notice on October 22, 2015 of Hearing and MDV Documents
- Wisconsin's Preliminary Economic Determination
- DOA Response to Comments on Preliminary Determination
- Wisconsin Register Published Notice of Final Economic Determination
- Supplemental Economic Information
- Public Noticed Final Economic Determination
- Public Noticed MDV Justification Document
- Public Noticed MDV Implementation Guidance
- Public Noticed Implementation Forms
- Comments Received on MDV Package
- Recording of Public Informational Hearing held on December 9, 2015
- Public Notice on May 5, 2015 of Informational Hearing and Preliminary Determination
- Response to Comments at Legislative Hearings on Act 205
- EPA approval documents
Webinar recording
Learn about eligibility and process to achieve successful approval of a multi-discharge phosphorus variance.