The IDNR is holding a public comment period on the proposed Regional Haze and Prong 4 (State Implementation Plan) SIP Revisions until April 29th. Revisions include:

  1. IDNR requesting EPA fully approve Iowa's regional haze SIP as meeting all applicable requirements by choosing to rely on the CSAPR trading program to satisfy Best Available Retrofit Technology (BART) requirements and reasonable progress requirements related to SO2 and NOx from electric generating units (EGUs).
  2. IDNR requesting EPA approve Iowa's prong 4 element for the state's infrastructure SIPs for the 2006 PM2.5, 2008 O3, 2010 NO2, 2010 SO2, 2012 PM2.5, and 2015 O3 NAAQS.

Submit comments to Matthew Johnson by April 29th. A public hearing will be held on April 29, 2019, at 2:00 p.m. at the Wallace State Office Building, located at 502 E 9th Street, Des Moines, IA 50319.