Federal Rulemaking - Archived Comment Letters

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Comments on Federal Actions

Archived Comment Letters

In an effort to ensure that federal actions are responsive to our state's needs and concerns, DEEP submits comments to EPA on proposed federal actions that impact the air quality of Connecticut, the Northeast and the entire United States. EPA provides a number of tools for you to track and participate in the development of new regulations, and to learn how to comply with existing regulations. Links to current comments on federal actions can be found on the Comments on Federal Actions webpage.

The comments below have been submitted to EPA by DEEP on various federal rules. (All documents are in pdf format unless noted otherwise).

2024

No documents available

2023

CTDEEP Comments on EPA's GHG Power Plant Proposal August 8, 2023

CTDEEP Comments on EPA's Findings of Substantial Inadequacy and SIP Calls to Amend Provisions Applying to Excess Emissions During Periods of Startup, Shutdown and Malfunction April 25, 2023

2022

CTDEEP Comments on the Federal Implementation Plan Addressing Regional Ozone Transport for the 2015 Ozone National Ambient Air Quality Standard June 21, 2022

CTDEEP Comments on two rules that reclassify portions of the state to more stringent nonattainment designations for the 2008 and 2015 ozone national ambient air quality standards (NAAQS) June 13, 2022

CTDEEP Comments on Proposed Standards of Performance for New, Reconstructed, and Modified Sources and Emissions Guidelines for Existing Sources: Oil and Natural Gas Sector Climate Review January 31, 2022

2021

No documents available

2020

CTDEEP Commissioner Dykes' Comments on EPA's Proposed Revised CSAPR Update December 14, 2020

CT DEEP Comments on the Draft Guidance: Interpretation of "Begin Actual Construction" Under the New Source Review Preconstruction Permitting Regulations May 11, 2020

2019

CT DEEP Comments on Oil and Natural Gas Sector (2019 Rule): Emissions Standards for New, Reconstructed, and Modified Sources Review November 25, 2019

CT DEEP Comments on Prevention of Significant Deterioration (PSD) and Non Attainment New Source Review (NNSR): Project Emissions Accounting October 4, 2019

CT DEEP Comments on EPAs Proposed Denial of NYDECs 126 Petition July 15, 2019

CT DEEP Comments on Reconsideration of Supplemental Finding and Residual Risk and Technology Review for the Mercury and Air Toxics (MATS) Rule April 4, 2019

Connecticut Comments on Proposed Review of Standards of Performance for Greenhouse Gas Emissions for New, Modified and Reconstructed Stationary Sources: Electric Utility Generating Units March 13, 2019

Connecticut DEEP Standards of Performance for New Residential Wood Heaters, New Residential Hydronic Heaters and Forced Air Furnaces January 14, 2019

2018

EPA's Proposed Reclassification of CT's Nonattainment Areas to Serious for the 2008 Ozone NAAQS December 14, 2018

Adopting Subpart Ba Requirements to Apply to the Emissions Guidelines for MSW Landfills December 13, 2018

Emissions Guidelines for Greenhouse Gases from Existing Electric Generating Units; Revisions to Emission Guideline Implementing Regulations; Revisions to New Source Review Program October 31, 2018

Connecticut Comments on EPA's Proposed CSAPR Close-out Rule August 31, 2018

EPA's Proposed Denial of the Maryland and Delaware 126(b) Petition July 23, 2018

EPA's Proposed Approval of KY's 2008 Ozone NAAQS Interstate Transport SIP May 18, 2018

DEEP Comments on EPA's Proposed Approval of Pennsylvania's RACT Requirements Under the 1997 and 2008 Ozone NAAQS April 13, 2018

2022-2025 Model Year Light-Duty Vehicle Greenhouse Gas Emission Standards April 2, 2018

Connecticut's Comments regarding EPA's Proposed Denial of the 126 Petition March 26, 201

EPA Responses to Certain State Designation Recommendations for the 2015 Ozone National Ambient Air Quality Standards February 15, 2018

2017

Objection to Delay of Designations for the 2015 Ozone Standard June 20, 2017

Connecticut's Comments on Evaluation of Existing Regulations, Executive Order 13777 May 15, 2017

Notice of Availability of the Environmental Protection Agency's Preliminary Interstate Ozone Transport Modeling Data for the 2015 Ozone National Ambient Air Quality Standard (NAAQS) April 6, 2017

Response to December 9, 2013, Clean Air Act Section 176A Petition March 9, 2017

Proposed Rule - Implementation of the 2015 National Ambient Air Quality Standards for Ozone: Nonattainment Area Classifications and State Implementation Plan Requirements February 10, 2017

2016

New York; Disapproval of Interstate Transport Requirements for the 2008 Ozone NAAQS July 21, 2016

Proposed Rule - Cross-State Air Pollution Rule Update for the 2008 Ozone NAAQS February 1, 2016

Connecticut's Comments to EPA on the 2018 Emissions Modeling Platform ; June 26, 2016

2015

Connecticut's Comments on EPA's Proposed Oil and Natural Gas Sector Emissions Standards for New and Modified Sources December 4, 2015

Reclassification of Connecticut for failing to attain the 2008 Ozone National Ambient Air Quality Standard September 28, 2015

Petition to add n-propyl Bromide (n-PB) to Clean Air Act Section 112 Hazardous Air Pollutants List May 13, 2015

Proposed Rule - National Ambient Air Quality Standards for Ozone March 16, 2015

2014

DEEP Comments on New York's Proposed RACT Demonstration for the 2008 NAAQS August 26, 2014

Comments on the Proposed Rule: Approval and Promulgation of Air Quality Implementation Plans: Ohio: Infrastructure SIP Requirements for the 2008 Lead, 2008 Ozone, 2010 NO2, and 2010 SO2 NAAQS August 25, 2014

Rescission of Determination of Attainment and Call for Attainment Plans for New York, New Jersey and Connecticut for the 1997 8-Hour Ozone National Ambient Air Quality Standard for the NY-NJ-CT 1997 Ozone Nonattainment Area (79 Fed. Reg. 27830, May 15, 2014) June 14, 2014

DEEP Comments on Pennsylvania's Proposed Additional RACT Requirements for Major Sources of NOx and VOC June 5, 2014

Proposed Standards of Performance for New Residential Wood Heaters, New Residential Hydronic Heaters and Forced-Air Furnaces, and New Residential Masonry Heaters May 5, 2014

Connecticut's Comments to EPA on the 2011 Emissions Modeling Platform March 31, 2014

2013

Recommended Designations for the 2012 Annual PM2.5 National Ambient Air Quality Standard December 13, 2013

Connecticut's Comments to EPA on the Proposed Rule to Implement the 2008 Ozone National Ambient Air Quality Standard for Ozone September 4, 2013

NACAA's Comments to EPA on the Proposed Rule to Implement the 2008 Ozone National Ambient Air Quality Standard for Ozone September 4, 2013

NESCAUM's Comments to EPA on the Proposed Rule to Implement the 2008 Ozone National Ambient Air Quality Standard for Ozone September 3, 2013

Comments Submitted to EPA on the Proposed Air Emissions Reporting Requirements (AERR) Rule August 5, 2013

Revised Recommendation Regarding Designations for the 1-Hour SO2 Air Quality Standard March 14, 2013

Attachment: Designation of Attainment of the 1-hour SO2 NAAQS TSD March 2013

Comment on the proposed reconsideration of certain National Emission Standards for Hazardous Air Pollutants (NESHAP) and Revisions to the New Source Performance Standards (NSPS) for Fossil Fuel-Fired Electric Generating Units January 7, 2013

2012

Comments of the Connecticut Department of Energy and Environmental Protection on the Proposed Rule for Stationary Turbines December 24, 2012

Comments Regarding Data Reporting Requirements for State and Local Vehicle Emission Inspection and Maintenance (I/M) Programs September 11, 2012

Redesignation Request and Maintenance Plan for the 1997Annual and 2006 24-hour PM2.5 National Ambient Air Quality Standards June 22, 2012

Comments submitted to EPA on Proposed Utility NESHAP July 12, 2011:

Cover letter and Attachments

NEEDS v410 Spreadsheet (EXCEL)

Link to Proposed Rule

Link to Extension of Comment Period

2008 8-Hour Ozone National Ambient Air Quality Standard: Connecticut’s Response to EPA’s 120-Day Letter February 27, 2012

Attachment A: Connecticut's Factor Analysis February 27, 2012

2011

2008 8-Hour Ozone National Ambient Air Quality Standard November 23, 2011

2008 8-Hour Ozone National Ambient Air Quality Standard: Recommended Attainment Area Designations October 28, 2011

Recommended Area Designations for the Revised SO2 Air Quality Standard June 6, 2011

Clean Ozone Data Determination/CAA Section 28S Fee Considerations for Southwest CT April 29, 2011

Connecticut Department of Environmental Protection Comments on Notice of Data Availability for Federal Implementation Plans To Reduce Interstate Transport of Fine Particulate Matter and Ozone February 3, 2011

2010

Recommended Area Designations for the Revised NO2 Air Quality Standard December 17, 2010

Notice of Data Availability Supporting Federal Implementation Plans To Reduce Interstate Transport of Fine Particulate Matter and Ozone: Revisions to Emission Inventories November 23, 2010

Notice of Data Availability Supporting Federal Implementation Plans To Reduce Interstate Transport of Fine Particulate Matter and Ozone October 14, 2010

Attachment: NEEDS Version 4.10 October 14, 2010 (EXCEL)

Proposed Transport Rule September 30, 2010

Comments on the SIP Call for Issuing Prevention of Significant Deterioration Permits to Sources of Greenhouse Gas Emissions September 30, 2010

Comments on the Proposed Federal Implementation Plans to Reduce Interstate Transport of Fine Particulates Matter and Ozone September 28, 2010

Request for Withdrawal of 2012 Transportation Conformity Budgets for Ozone August 23, 2010

2009

Proposed Prevention of Significant Deterioration (PSD) and Title V Greenhouse Gas Tailoring Rule December 28, 2009

Connecticut’s recommended attainment designations for the revised national ambient air quality standard (NAAQS) for airborne lead October 6, 2009

Comments Submitted to EPA/NHTSA on Vehicle Fuel Efficiency Requirements (CAFE) and Motor Vehicle Greenhouse Gas Emission Standards November 19, 2009

Comments Submitted to EPA on Proposed Rulemaking for the Emission Factors Improvement Programs November 12, 2009

Comments Submitted to EPA on the Area Source Asphalt Manufacturing NESHAP August 7, 2009

Proposed Disapproval of Connecticut’s Ozone Attainment Demonstration July 31, 2009

Proposed Disapproval of the Southwest Connecticut Attainment Demonstration for the 1997 Ozone NAAQS June 8, 2009

2008

No documents available

2007

Recommended Designations for the 24-Hour PM2.s National Ambient Air Quality Standard December 14, 2007

Comments submitted to EPA on Aerosol Coatings VOC Standards August 29, 2007

Comments on the Supplemental Notice of Proposed Rulemaking for Prevention of Significant Deterioration and Nonattainment New Source Review: Emission Increases for Electric Generating Units, 72 FR 26202 (May 8, 2007) August 8, 2007

Connecticut Department of Environmental Protection Comment on Revisions to Definition of Cogeneration Unit in Clean Air Interstate Ride (CAIR), CAIR Federal Implementation Plan, Clean Air Mercury Rule (CAMR), and CAMR Proposed Federal Plan; Revision to National Emission Standards for Hazardous Air Pollutants for Industrial, Commercial, and Institutional Boilers and Process Heaters; and Technical Corrections to CAIR and Acid Rain Program Rules, 72 Fed. Reg. 20465, (April 25, 2007) May 16, 2007

2006

Comment on Notice of Data Availability for EGU NOx Annual and NOx Ozone Season Allocations for the Clean Air Interstate Rule Federal Implementation Plan Trading Programs 71 Fed. Reg. 44283, (August 4, 2006) September 1, 2006

Comments on EPA’s Proposed Transition to New or Revised Particulate Matter National Ambient Air Quality Standards July 7, 2006

Comments on National Ambient Air Quality Standards for Particulate Matter, and Revisions to Ambient Air Monitoring Regulations April 11, 2006

Connecticut DEP Comments on Proposed Prevention of Significant Deterioration, Nonattainment New Source Review and New Source Performance Standards: Emissions Test for Electric Generating Units, 70 FR 61081 (October 20, 2005) February 17, 2006

Comments submitted to EPA on Proposed Rule for Large Municipal Waste Combustors February 3, 2006

Connecticut Department of Environmental Protection Comments on the Proposed Rule to Implement the Fine Particle National Ambient Air Quality Standards, 70 FR 65984 (November 1, 2005) January 30, 2006

2005

Connecticut Department of Environmental Protection Comment on Rule To Reduce Interstate Transport of Fine Particulate Matter and Ozone (Clean Air Interstate Rule): Reconsideration, 70 Fed Reg. 72268, (December 2, 2005) December 23, 2005

Proposed Average Fuel Economy Standards for Light Trucks Model Years 2008-2011 November 22, 2005

Connecticut Department of Environmental Protection Comments on Rulemaking on Section 126 Petition from North Carolina To Reduce Interstate Transport of Fine Particulate Matter and Ozone; Federal Implementation Plans To Reduce Interstate Transport of Fine Particulate Matter and Ozone; Revisions to the Clean Air Interstate Rule; Revisions to the Acid Rain Program; Proposed Rule, 70 Fed. Reg. 49708, (August 24, 2005) October 21, 2005

PM2.5 National Ambient Air Quality Standard Final Designations for Connecticut February 15, 2005

2004

Connecticut DEP Comments on EPA ’s Notice of Data Availability Regarding The Proposed Clean Air Mercury Rule December 28, 2004

Comments Submitted to EPA on Stage II Vapor Recovery/ORVR

Comments submitted to EPA on Stage II Issues Paper September 30, 2004

Comments submitted to EPA Regarding Stage II/ORVR (link to EPA)

Connecticut Designations under the PM2.5 National Ambient Air Quality Standard August 30, 2004

Attachment: Response to the EPA 9-Factor Analysis for PM2.5 Designations August 26, 2004

Connecticut DEP Comments on Supplemental Proposal for the Rule to Reduce Interstate Transport of Fine Particulate Matter and Ozone July 23, 2004

Comments on Proposed National Emission Standards for Hazardous Air Pollutants; and, in the Alternative, Proposed Standards of Performance for New and Existing Stationary Sources: Electric Utility Steam Generating Units June 28, 2004

Comments on Proposed Rule to Reduce Interstate Transport of Fine Particulate Matter and Ozone March 30, 2004

PM2.5 National Ambient Air Quality Standard Recommended Designations for Connecticut February 10, 2004

Attachment: Technical Support Document Recommendation for PM2.5 Designation (Corrected) February 2004

Figures for Technical Support Document February 2004

Appendix - Connecticut DEP PM Monitoring Plan July 1, 1998

Content Last Updated on January 28, 2026