Pennsylvania environmental and land-use rules for development
The Pennsylvania rules a development project meets, the dates that matter next, and what changed recently: 33 state rules and 19 federal rules that reach Pennsylvania projects, each with its official source, including 8 proposed or with changes pending.
Coming up in Pennsylvania
October 2026
1 dateFederalTakes effectMediumIn 3 days
USDA Rural Energy for America Program (REAP) grants and guaranteed loans: Revised REAP grant rule takes effect
November 2026
2 datesFederalReport dueHighIn 19 days
PM2.5 designations: states' additional information requested
Area designations under the 2024 annual fine-particle (PM2.5) standard · Official source
FederalComments closeHighIn 23 days
PM2.5 designations: comments close
Area designations under the 2024 annual fine-particle (PM2.5) standard · Official source
February 2027
1 dateFederalHearing or decisionHighIn 4 months
PM2.5 designations: EPA's court-ordered deadline for final designations
Area designations under the 2024 annual fine-particle (PM2.5) standard · Official source
The full Pennsylvania calendar
Latest Pennsylvania briefings
- MediumPennsylvania
Pennsylvania requires proof of a water supplier before towns give final approval to development plans
From December 7, subdivision and land development plans served by public or community water need documented supply arrangements before final approval, though proof of adequate capacity is not required.
- MediumPennsylvania
Pennsylvania board to consider stricter protection for 16 stream basins on October 13
On October 13, 2026 the Environmental Quality Board is to consider a proposal to redesignate 16 stream basins covering 138.47 miles, most as Exceptional Value. New or expanded discharges would face antidegradation review and individual permits. A proposal only; comment dates are not yet set.
- HighPennsylvania
Federal: Philadelphia, Pittsburgh and central Pennsylvania counties may face stricter air permits under soot standard
EPA has signaled which areas may be found to violate the 2024 fine-particle standard, including four South Jersey counties. Comments close November 5; final designations are due by February 6, 2027.
- HighPennsylvania
Pennsylvania proposes cutting power to data centers first when the regional grid runs short
State utility regulators propose that utilities curtail large computing loads lacking their own new capacity before other customers in grid emergencies; comments are due 30 days after Bulletin publication.
- MediumDauphin County, PA
Federal: Regulators find no significant impact from restarting Pennsylvania's Three Mile Island reactor
Federal nuclear and energy agencies issued a final environmental finding for the Crane Clean Energy Center restart, and the nuclear regulator upheld denial of a hearing; license decisions remain pending.
- MediumPennsylvania
Federal rule limits challenges to construction air permits through operating-permit reviews, effective October 26
A final federal rule says preconstruction air permits issued with public comment and court review define a plant's requirements in its operating permit, narrowing grounds for federal objections and citizen petitions.
- LowLuzerne County, PA
Federal: Transco seeks approval for Luzerne County gas pipeline loop; party deadline October 13
Transco asked federal regulators on September 4 to approve a $54.7 million, 3.38-mile pipeline loop and compressor work in northeastern Pennsylvania; scoping comments are due November 2.
- MediumChester County, PA
Pennsylvania: East Whiteland ends data center pause, limits new centers to industrial district by conditional use
A Chester County township closed a six-month zoning pause by adopting data center rules on September 24, 2026; the posted final draft sets 1,250-foot buffers, night noise caps and closed-loop cooling.