Public Hearing: Proposed Visibility State Implementation Plan

Division of Air Quality

Published: Nov. 21, 2021
Comments Due: Jan. 13, 2021

The Department of Natural Resources and Environmental Control (DNREC) will conduct a public hearing (Docket # 2021-R-A-0019) on Delaware’s Proposed Visibility State Implementation Plan.

The federal Clean Air Act mandates protection of visibility in Class I federal areas, such as national parks, forests and wilderness areas. Under the 1999 Regional Haze Rule, states are required to develop a series of State Implementation Plans (SIPs) to reduce visibility impairment; with the express intent that, by 2064 the visibility in the Class I areas will be returned to natural conditions. States are required to develop a series of SIPs to address visibility impairment in Class I areas and make reasonable progress toward achieving natural visibility conditions. This proposed SIP covers the 2nd implementation period of 2018 – 2028.

A virtual public hearing will be held on Wednesday, December 29, 2021 beginning at 6 p.m. The web link to the virtual hearing can be accessed through the DNREC Public Hearings site at If prompted for a password, please use: RegHazeSIP. To access the audio-only portion of the virtual hearing, dial 1-408-418-9388 and enter the event code 2349 508 0655. Closed-captioning is available by request if made at least 7 days before the event.

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 302-739-9295.

The proposed SIP may be inspected online starting December 1, 2021 at, or in-person, by appointment only, by contacting Renae Held by phone at 302-739-9402 or by email at

The Department will accept public comment through the close of business on Thursday, January 13, 2022. 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:

Lisa A. Vest, Hearing Officer
Office of the Secretary
Department of Natural Resources and Environmental Control
89 Kings Highway
Dover, DE 19901