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Air Quality Rules to Establish Mercury Air Emission Reduction and Reporting Requirements

The Minnesota Pollution Control Agency (MPCA) is currently proposing amendments to rules relating to mercury air emissions reporting and reduction; Minnesota Rules Chapters 7005, 7007, 7011, and 7019. The public notice for the proposed rules is available on the MPCA Public Notice webpage. The proposed rules are open for public comment from December 2, 2013, through January 17, 2014. The MPCA is requesting comments on the proposed rules. Comments should be submitted in writing in accordance with the provisions of the public notice. The proposed rule amendments and related documents are provided below.  

Proposed Rule Amendments and Related Documents


Two-thirds of Minnesota’s lakes and rivers are impaired due to mercury. Most of this mercury is deposited from the air. Minnesota’s Statewide Mercury Total Maximum Daily Load (TMDL) study evaluated surface waters contaminated by mercury. The study established pollution reduction goals for facilities within Minnesota releasing mercury to both water and the air to do their share to restore surface waters to meet water quality standards. The TMDL was approved by the U.S. Environmental Protection Agency in 2007 and established a need for a 93 percent reduction in mercury air emissions from 1990 baseline mercury emissions. The proposed rules, as described below, implement the mercury reduction activities identified in the PDF Document Minnesota Statewide Mercury TMDL Implementation Plan (wq-iw4-01p) .  

These proposed rule amendments establish requirements for certain sources of mercury air emissions to bring both public and privately owned facilities into line with the Statewide Mercury TMDL reduction goals. Described below are the three main parts of the rule amendments the MPCA is proposing to accomplish these reductions. For more information about the proposed amendments, please refer to the SONAR.

The proposed rule amendments include three main parts:

  1. Mercury Reduction Plans. Affected facilities must prepare mercury reduction plans to meet their sector’s specified reduction target, stated within the TMDL Implementation Plan.The rules identify what the reduction plan must include, and establish a schedule for plan submittal for each source category to identify how they will reduce mercury emissions.
  2. Performance Standards. Certain facilities are required to meet performance standards for mercury control. In general, these facilities are already required to meet federal performance standard requirements. This portion of the rules does not impose any new emission reductions or costs beyond what is already required by state statutes or federal standards. 
  3. Emission Inventory for Mercury. The rule requires facilities to submit a mercury emission inventory to the MPCA. This impacts 35 or fewer facilities. The MPCA currently compiles a voluntary mercury inventory every three years. The rule requires annual emission reporting from the largest sources; small sources with actual emissions less than three pounds per year will continue with the three year inventory.  

Current Minnesota Statutes and Rules

  • Minnesota Statutes – Powers and Duties (116.07)
  • Minnesota Rules – Definitions and Abbreviations (Chapter 7005)
  • Minnesota Rules – Permits and Offsets, Air Emission Permits (Chapter 7007)
  • Minnesota Rules – Standards for Stationary Sources (Chapter 7011)
  • Minnesota Rules – Emission Inventory Requirements (Chapter 7019)

Tentative Schedule



Publish request for comments

July 27, 2009

Stakeholder engagement

Preliminary Draft #1 — A stakeholder meeting was held November 2010 and a preliminary draft of the rule was shared.

Industry Sector Meetings — Industry specific stakeholder meetings were held in advance of the July 31, 2012 TMDL stakeholder group meeting.  The purpose of these meetings was to share only performance standard rule language being considered for that sector.  The four industry sector meetings were held on the following dates:

  • Crematoria — February 28, 2012, MPCA St. Paul
  • Iron and steel plants — February 29, 2012, MPCA St. Paul
  • Taconite — March 7, 2012, MPCA St. Paul and Duluth
  • Mercury recycling/lamp recycling — April 16, 2012, MPCA St. Paul

Publish Dual Notice

December 2, 2013

Post-comment period/Administrative Law Judge review

By July 16, 2014

The rules will be submitted to the Office of Administrative Hearings for review by the Administrative Law Judge. In general, the Office of Administrative Hearings will approve, disapprove, or recommend rule changes without disapproving the rule.

Adoption of Rules

Approximately 2 months after Office of Administrative Hearings review of the rules.


Rule-related Documents

Rule Contacts

Related Materials

Last modified on June 12, 2014 13:22

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