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PUBLIC NOTICE | Proposed Revision to SIP: New Source Review — Significant Emission Rate for Ammonia in PM2.5 Nonattainment Areas

ADEQ welcomes comments on the proposed 2019 State Implementation Plan (SIP): New Source Review—Significant Emission Rate for Ammonia in PM2.5 Nonattainment Areas. The SIP revision proposes to adopt a significant emission rate for ammonia, as a precursor in the formation of secondary PM2.5, in PM2.5 nonattainment areas.  Additionally, the SIP revision proposes to amend several rules in Arizona’s approved SIP to make technical corrections to improve clarity.  The SIP revision will be submitted to the Environmental Protection Agency for incorporation into Arizona’s State Implementation Plan as required by the federal Clean Air Act.

Review Documents

Original Published Public Notice | View >

Proposed SIP Revision | View >

Documents are also available for review at ADEQ's Records Center | Learn More > 

Comment Period

Nov. 20, 2019 – Dec. 23, 2019

You can submit comments by one of the following:

By Email:

Send Email > 

By Mail:

Must be postmarked or received no later than Dec. 23, 2019
Zachary Dorn
Air Quality Division
1110 W. Washington St.
Phoenix, AZ 85007

Public Hearing

Comments are also welcome at the following public hearing:

Date: Dec. 23, 2019
Time: 11 a.m.
Location: ADEQ Phoenix Office, Room 3100B
                   1110 W. Washington St.
                   Phoenix, AZ 85007