Notice of Public Hearing: Delaware’s State Implementation Plan

Division of Air Quality

Published: Dec. 17, 2023
Comments Due: Feb. 7, 2023

The Department of Natural Resources and Environmental Control (DNREC), Division of Air Quality (DAQ) will conduct a public hearing (Docket # 2022-R-A-0006) on a proposed revision to Delaware’s State Implementation Plan (SIP) on Tuesday, January 23, 2024 beginning at 6:00 p.m. as described below.

The hearing will address the Delaware 2nd Particulate Matter Limited Maintenance Plan under the 2006 24-hour Fine Particulate Matter (PM2.5) National Ambient Air Quality Standard (NAAQS). On December 14, 2009, EPA designated the Philadelphia-Wilmington Area as nonattainment for the 2006 24-hour (PM2.5) NAAQS. On September 5, 2014, the EPA redesignated the area as attainment. Redesignated areas are required to submit two ten-year maintenance plans to ensure continued attainment with the NAAQS. This proposed second 10-year Particulate Matter Limited Maintenance Plan ensures that Delaware will continue to maintain the NAAQS through 2035.

The proposed SIP may be inspected online starting January 1, 2024 at, or in-person, by appointment only, by contacting Kelsey Pangman by phone at 302-323-4542 or by email at

The web link to the virtual hearing can be accessed through the DNREC Public Hearings site at If prompted for a password, please use: 525367. To access the audio-only portion of the virtual hearing, dial 1-646-931-3860 and enter the Meeting ID 848 3456 0743. Closed captioning in over 20 languages, including English and Spanish, is available to attendees via the Zoom platform utilized for all DNREC Public Hearings.

Those wishing to offer verbal comments during DNREC public hearings must pre-register no later than noon of the date of the virtual hearing at or by telephone at 302-739-9001.

The Department will accept public comment through Wednesday, February 7, 2024. Comments will be accepted in written form via email to, or by using the online form at, or by U.S. mail to the following address:

Theresa Smith, Hearing Officer
DNREC — Office of the Secretary
89 Kings Highway, Dover, DE 19901