Connecticut Department of Energy & Environmental Protection

Emergency Burn Ban In Effect 10/26/24 - An emergency burn ban is now in effect for all Connecticut State Parks, Forests, and Wildlife Management areas, prohibiting the use of all outdoor grills, firepits, and campfires, and the kindling and use of flame outdoors. DEEP and local agencies are working to contain several active fires across the state. Please avoid all affected State Parks and Forests, as well as the blue-blazed Mattabesett Trail. The Enduro Trail in Voluntown and portions of North Stonington within the Pachaug State Forest are closed at this time. Please note that today's forest fire danger report remains at an 'extreme' level. More information about the current fire danger, burn ban and recommended safety measures can be found here

Reclassification of Southwest Connecticut to Severe Nonattainment for Ozone

On November 7, 2022, EPA's determination that three counties in Connecticut currently designated “serious” nonattainment for the 2008 National Ambient Air Quality Standards (NAAQS or standards) for ozone failed to meet attainment of the NAAQS by the attainment date of July 20, 2021 became effective. The final rule, “Determinations of Attainment by the Attainment Date, Extension of the Attainment Date, and Reclassification of Areas Classified as Serious for the 2008 Ozone National Ambient Air Quality Standards”, includes a reclassification to the higher level of “severe” non-attainment which is accompanied by more stringent control measure requirements. 

Connecticut’s five remaining counties have been determined to attain the 2008 standard.  Nevertheless, the entire state remains nonattainment for the more stringent 2015 standard which is not addressed by this proposal. 

The 1990 Clean Air Act Amendments classified the air quality control region in southwest Connecticut, consisting of the towns of New Milford and Bridgewater plus Fairfield County, excluding Shelton, as “severe” nonattainment for the ozone standard in place at the time.  While that area, and all of Connecticut, has attained the 1-hour ozone standard, regulatory requirements consistent with that “severe” designation have remained in place as control measures for subsequent standards.  With this final determination and corresponding regulatory changes by the Department, the “severe” area requirements within the federal Clean Air Act will extend to the owners or operators of certain air pollution sources within the forty-three (43) affected towns of Fairfield, New Haven and Middlesex counties.  Regulatory requirements already associated with New Milford and Bridgewater will remain in effect. 

The following figure is a map of the original severe 1-hour ozone non-attainment towns on the left and a map of the new proposed severe area counties on the right:

Connecticut Severe Ozone Non-Attainment Area 

While there are additional administrative requirements that coincide with the “severe” designation, the most significant requirements affecting the regulated community are as follows:

Title V and New Source Review Permits:  Immediately upon reclassification permit requirements for severe areas will extend to all areas previously and currently designated “severe” and will include lower major source thresholds of 25 tons per year and offset ratios of 1.3 to 1.   For more information on how permit status is affected refer to the permitting FAQs.

Reasonably Available Control Technology Requirements (RACT):   RACT contained in RCSA sections 22a-174-22e and 22a-174-22f will be updated to apply to all major sources within the “severe” area.  Additional requirements may result from updates to Control Techniques Guidelines (CTGs) and Alternative Control Techniques (ACTs) which may result in additional regulatory changes.

For more information, follow this link to the EPA presentation from the April 2022 SIPRAC meeting.

Updates to the reclassification process will be posted to this page as they become available.


Content Last Updated August 23, 2023