Indiana: Air
March 2011
Volume
41
Issue
5
Update Volume
41
Update Issue
8
The Air Pollution Control Board amended 326 Ind. Admin. Code 1-3-4, concerning the NAAQS for nitrogen dioxide and sulfur dioxide. The rule took effect March 9, 2011. http://www.in.gov/legislative/iac/20110309-IR-326100495FRA.xml.pdf.