The Department of Environmental Protection published notice in the January 18 PA Bulletin inviting comments on new and revised DEP Water Quality Assessment Methodology for listing and delisting impaired waters under the federal Clean Water Act 2026 Integrated Water Quality Monitoring and Assessment Report.

The draft new assessment methodology includes the Wadeable Freestone Acidification Assessment Method, the Physicochemical Potable Water Supply Assessment Method and the Bacteriological Source Method.

The draft revised assessment methodology also includes the General Source and Cause Method and the Eutrophication Cause Method.

The draft Methodology will be posted on DEP’s eComment webpage.

Comments are due March 19-- 60 days from the notice.

Read the entire PA Bulletin notice for a short summary of the proposed changes and how to submit comments.

Visit DEP’s Integrated Water Quality Report webpage for more information on this program.

For more information on environmental programs in Pennsylvania, visit DEP’s website.  Submit Environmental Complaints; Click Here to sign up for DEP’s newsletter; sign up for DEP’s eNotice; Like DEP on Facebook, Follow DEP on Twitter and visit DEP’s YouTube Channel.

[Posted: January 17, 2025]

1/20/2025