SO<sub>2</sub>

SO₂

primary	1-hr	75 ppb	195 mcg/m³	99th percentile of 1-hour daily maximum concentrations, averaged over 3 years (calendar or rolling daily?)
secondary	3-hr	500 ppb	1300 mcg/m³	high second-high

SO₂ Implementation Guidance
February 2013 SO₂ NAAQS implementation strategy (same as above?) ("White Paper?")
EPA strategy paper (Feb. 2013)
Draft SO₂ NAAQS Designations Modeling Technical Assistance Document
Draft guidance for 1-Hour SO2 NAAQS SIP Submissions
Trinity presentation for Missouri (provides timelines)
Sierra Club comments on proposed non-attainment counties; modeling performed for selected sources in Maryland, Montana, New York, and Tennessee
SO2 infrastructure docket

Attainment status in Ohio
old standard

current standard

attainment

unclassifiable

nonattainment SIP; map; inventory; TSD

(back)

1/7/15