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  3. Air Standards Delegations in Wisconsin

Wisconsin (Part 60) NSPS and (Part 61) NESHAP Delegations

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Clean Air Act Delegations in Wisconsin

Wisconsin has delegation of all existing and future Part 60 New Source Performance Standards (NSPS) and Part 61 National  Emission Standards for Hazardous Air Pollutants (NESHAPs) standards. Wisconsin has primary implementation and enforcement authority for the delegated standards. 

What are new source performance standards (NSPS)?

Section 111 of the federal Clean Air Act directs EPA to establish pollution control requirements for certain industrial activities which emit significant "criteria air pollutants." These requirements are known as new source performance standards (NSPS) and regulate pollutants such as particulate matter, sulfur dioxide, carbon monoxide, nitrogen oxides, volatile organic compounds, acid mist, total reduced sulfur and fluorides. NSPS are detailed in Chapter 40 of the Code of Federal Regulations, Part 60 (40 CFR Part 60), and are intended primarily to establish minimum nationwide requirements for new facilities.

What are national emission standards for hazardous air pollutants (NESHAPs)?

Section 112 of the pre-1990 federal Clean Air Act directed EPA to establish standards to reduce emissions of hazardous air pollutants (HAPs). These pollutants include asbestos, benzene, beryllium, inorganic arsenic, mercury, radionuclides, and vinyl chloride. NESHAPs are detailed in 40 CFR Part 61 and establish minimum nationwide requirements for existing and new facilities.

Federal Register Documents for Approval

Federal Register Notice: July 16, 1984 (pdf) (10.36 MB)  - Standards of Performance for New Stationary Sources; National Emission Standards for Hazardous Air Pollutants; Delegation of Authority to States

Delegation Request and Other Historical Documentation

  • Wisconsin NSPS NESHAP Delegation - April 1988 (pdf) (469.56 KB, April 8, 1988)
  • Wisconsin NSPS NESHAP Delegation Request - October 1983 (pdf) (107.61 KB, Oct. 20, 1983)
  • Wisconsin NSPS NESHAP Delegation - September 1983 (pdf) (448.93 KB, Sept. 27, 1983)
  • Wisconsin NSPS NESHAP Delegation Request - August 1983 (pdf) (118.43 KB, Aug.10, 1983)
  • Wisconsin Delegation Authority (pdf) (397.91 KB, Mar. 30, 1977)

EPA in Wisconsin

  • Hot Topics in Wisconsin
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  • Air Standards Delegations in Wisconsin
    • Wisconsin (Part 60) Emission Guidelines and (Part 62) State/Federal Plans (Section 111d/129) Delegations
    • Wisconsin (Part 60) NSPS and (Part 61) NESHAP Delegations
    • Wisconsin (Part 63) MACT Standards Delegations
  • Battery and Electronics Recycling Inc.
  • EPA Investigating Milwaukee Company for Potential Environmental Violations
    • Container Life Cycle Management Desk Statement
    • Documents
  • NPDES Petition for Program Withdrawal in Wisconsin
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Last updated on March 20, 2025
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