New Source Review Permitting Improvement Act

WHAT HAPPENED: On April 28, 2026, HR161 (New Source Review Permitting Improvement Act) was reported (amended) by the House Committee on Energy and Commerce with report H. Rept. 119-625. The bill was then placed on the Union Calendar (Calendar No. 542), indicating it is ready for floor action. The bill, introduced by Rep. Griffith (R-VA) on January 3, 2025, has 21 cosponsors and passed through subcommittee markup (12-11) on December 10, 2025, and full committee markup (28-23) on January 21, 2026. The legislative trajectory shows partisan momentum but narrow margins. THE MONEY TRAIL: This bill is a regulatory relief mechanism — it does not authorize or appropriate any federal spending. The mechanism is purely deregulatory: amending Clean Air Act Sections 111(a), 169(2), and 171 to redefine 'modification' for NSR permitting. The key change: a physical change at a stationary source is only a 'modification' if the maximum hourly emission rate achievable after the change exceeds the maximum hourly rate achievable in any hour of the prior 10 years. Additionally, changes designed to reduce emissions per unit of production, or to restore/maintain/improve reliability or safety, are explicitly excluded from the modification definition unless the EPA Administrator determines the increase would cause adverse health or environmental effects. STRUCTURAL WINNERS AND LOSERS: The direct beneficiaries are U.S. petroleum refiners and chemical manufacturers with existing stationary sources. Refiners ($MPC, $PSX, $XOM, $CVX) are primary beneficiaries because they operate the most NSR-regulated facilities and have the largest capital stock of aging infrastructure needing reliability upgrades. Chemical companies ($LYB, $DOW) benefit similarly. Celanese ($CE) shows minimal 7-day movement (-0.21%), suggesting the market may consider its specialty chemical operations less impacted. The bill does not affect utilities that operate only in non-attainment areas differently, but coal-fired power plants are indirect beneficiaries. The Presidential Memorandum supporting domestic petroleum production noted in the prompt is a separate executive action and is not analyzed here. REAL MARKET DATA ANALYSIS: The data shows a clear sector rally in heavy industry refining stocks coinciding with the bill's committee report on April 28. Marathon Petroleum ($MPC) surged from $227.21 on April 27 to $241.81 by April 30 (+6.42% in three days, +9.37% for the week). Phillips 66 ($PSX) similarly moved from $164.10 to $173.49 (+5.72% in three days, +8.75% weekly). ExxonMobil ($XOM, +2.75% weekly) and Chevron ($CVX, +2.9% weekly) also gained but less dramatically, consistent with their diversified business models (upstream, midstream, chemicals) diluting the refining-only benefit. Chemical stocks showed mixed reaction: LyondellBasell ($LYB) gained +4.58% weekly and Dow ($DOW) +2.51%, while DuPont ($DD) fell -3.48% and Celanese ($CE) was flat (-0.21%). This divergence supports the causal chain: pure-play commodity refiners benefit most, while specialty chemical exposure is less direct. TIMELINE: The bill is now on the Union Calendar — it awaits scheduling for floor debate and vote in the House. Given it is the 119th Congress (2025-2027), the bill has ~20 months remaining in this Congress. The narrow committee vote (28-23, along party lines) suggests floor passage is not guaranteed without bipartisan modifications. Senate companion legislation has not been introduced — this is a standalone House bill, reducing passage probability. However, the committee report (H. Rept. 119-625) provides legislative history that EPA must consider in future rulemaking, creating some industry certainty even without final passage.