Air and climate

Air permits, emissions limits, greenhouse gas programs such as RGGI, and building performance rules. What changed, the rules that apply and the dates ahead for projects in New Jersey, New York, Connecticut and Pennsylvania.

Latest briefings

1. MediumFairfield County, CTOct 9, 2026

   Connecticut grants contested hearing on Brookfield gas compressor expansion before air permits issue, groups report

   State environmental regulators have granted a trial-type hearing on air permits for two new gas turbines at the Iroquois pipeline's Brookfield station, according to Save the Sound; no date is set.

   ProposedAir & climateEnergy & grid
2. MediumConnecticutSep 18, 2026

   Federal: Proposed air permit rule would let some non-emitting site work start before the permit issues

   EPA's May 13, 2026 proposal would redefine when construction begins under New Source Review so that foundations, utility service and similar non-emitting work could proceed before a permit. Comments closed June 29, 2026. It is not in force.

   ProposedAir & climateEnergy & grid

Rules 7

• Federal · Clean Air Act § 107(d), 42 U.S.C. 7407(d); 91 Fed. Reg. 63516 (Oct. 6, 2026); Docket EPA-HQ-OAR-2024-0078Area designations under the 2024 annual fine-particle (PM2.5) standard
• Federal · 40 CFR 61.145Asbestos notice before demolition and renovation
• Federal · 40 CFR Part 745, Subpart ELead-safe renovation of pre-1978 housing and child-occupied buildings
• Connecticut · C.G.S. 29-252, 29-252b; PA 26-58; 2026 State Building Code2026 State Building Code (pending)
• Connecticut · C.G.S. 22a-174; R.C.S.A. 22a-174-3a, -3b, -3cAir permits for new sources and generators
• Connecticut · C.G.S. 22a-174; R.C.S.A. 22a-174-31 and 22a-174-31a (proposed amendments, PR2025-028)Power plant CO2 cap update (RGGI, from 2027)
• Connecticut · C.G.S. 22a-449(d); R.C.S.A. 22a-449(d)-1, -101 to -114Underground and aboveground storage tank rules

Coming up

• Nov 1, 2026Federal · Report duePM2.5 designations: states' additional information requested
• Nov 5, 2026Federal · Comments closePM2.5 designations: comments close
• Feb 6, 2027Federal · Hearing or decisionPM2.5 designations: EPA's court-ordered deadline for final designations

Funding and incentives 1

• Federal · US Environmental Protection AgencyEPA Greenhouse Gas Reduction Fund (Solar for All, National Clean Investment Fund, Clean Communities Investment Accelerator)