Pennsylvania: DEP drafts revised small-site construction stormwater permit with new municipal certification route
A draft revision of PAG-01, which DEP reports was published August 22, 2026 with comments closed September 21, would align it with PAG-02 and add a municipal certification route with no impervious-area limits. DEP estimates issuance in January 2027 and effect March 1, 2027.
The Department of Environmental Protection ("DEP") has proposed changes to PAG-01, the statewide NPDES general permit for stormwater discharges from small construction activities under 25 Pa. Code Chapter 102. According to a DEP presentation to the Water Resources Advisory Committee (filed under its September 9, 2026 meeting), the draft was published in the Pennsylvania Bulletin on August 22, 2026 and the public comment period closed on September 21, 2026. DEP's September 2026 report to the Citizens Advisory Council gives the same comment dates (opens August 22, closes September 21). The permit revision is a draft and is not in force.
25 Pa. Code Chapter 102; NPDES General Permit PAG-01 (draft revision, published in the Pennsylvania Bulletin August 22, 2026); 40 CFR 122.26(b)(15)