Trump Administration Pushes Year-Round E15 Fuel Sales

Why It Matters

The debate over E15 fuel year-round sale has been simmering for years, with the Trump administration already acting unilaterally to keep the ethanol-gasoline blend on the market through the summer. A new Congressional Research Service report clarifies the issues now squarely before Congress.

E15, a fuel blend of up to 15 percent ethanol and 85 percent gasoline, is generally barred from sale during the summer driving season (June 1 through September 15) because it does not meet federal volatility standards designed to limit smog under the Clean Air Act. Every summer, that restriction hands Congress and the White House a politically loaded choice, either to protect air quality rules or support corn-state ethanol producers and consumers who want cheaper fuel.

The stakes are high enough that the Trump administration embedded E15 availability in its first-day executive order on energy, and the House has already passed a resolution creating a dedicated council to study the issue. Permanent legislation is moving forward. The new CRS report lays out why the current patchwork of emergency waivers is not a durable solution.

The Big Picture

Why E15 Availability Restrictions Exist

The Clean Air Act limits gasoline volatility during summer months to reduce ground-level ozone, a primary component of smog. The standard metric is Reid Vapor Pressure (RVP), and the law generally prohibits selling gasoline with an RVP greater than 9.0 pounds per square inch during high-ozone months across the 48 contiguous states and the District of Columbia.

The problem for E15 is chemistry. The National Renewable Energy Laboratory (NREL) reported in 2012 that adding 10 percent ethanol to gasoline raises the RVP of the blend by about 1.0 psi. The law already carves out a "one-pound waiver" for E10, the 10 percent ethanol blend that dominates the market, allowing it a slightly higher RVP limit under certain conditions. No equivalent statutory carve-out exists for E15.

The same 2012 NREL report, however, found that "the RVP impact of 15% ethanol is indistinguishable from that of 10% ethanol in gasoline for all volatility seasons," and that "there is no technical reason for treating E10 differently from E15." That finding has become a cornerstone of the argument for changing the law.

EPA E15 Regulations and the Rolling Waiver Workaround

Rather than waiting for Congress, the EPA has used its emergency waiver authority under the Clean Air Act to allow summer E15 sales, with one catch. Each waiver is legally capped at 20 calendar days, meaning the agency must issue a continuous series of consecutive waivers throughout the summer driving season to keep E15 on the market.

On March 25, 2026, EPA issued the first nationwide fuel waiver for the 2026 summer driving season, citing "ongoing issues in the Middle East, among other events" as creating extreme and unusual fuel supply circumstances that justify the action. EPA also stated its intention to keep issuing consecutive waivers until those circumstances are no longer present.

The approach works, but only as long as the legal justification holds. If geopolitical conditions shift or the emergency framing is challenged, the entire summer E15 market could be disrupted.

E15 Year-Round Sale and the Political Stakes

For the Administration

President Trump signed Executive Order 14156, "Declaring a National Energy Emergency," on January 20, 2025. Section 2(b) of that order directed the EPA Administrator to "consider issuing emergency fuel waivers to allow the year-round sale of E15 gasoline to meet any projected temporary shortfalls in the supply of gasoline across the Nation." The order does not require the administrator to act, but the March 2026 waiver shows the administration is following through.

Supporting E15 ethanol gasoline blend availability fits neatly into the administration's energy dominance framework and its appeal to rural, agricultural constituencies. Corn-state ethanol producers stand to benefit significantly from expanded E15 sales. The administration's deregulatory posture also makes a permanent statutory fix, rather than continued reliance on emergency authority, an attractive outcome.

For Congress

In January 2026, the House passed H.Res. 375, which established an E-15 Rural Domestic Energy Council and directed it to investigate E15 sales, develop legislative solutions, and submit recommendations to Congress. Two bills in the 119th Congress propose making permanent year-round E15 sales the law of the land, namely S. 593 in the Senate and H.R. 1346 in the House, which was reported by the House Committee on Rules in April 2026.

Some members of Congress have stated that "any legislative movement on E15 must be conditioned upon meaningful reforms to the Renewable Fuel Standard," the federal program that mandates minimum volumes of renewable fuel in the transportation supply. That linkage could complicate or slow final passage. E15 provisions were included in a short-term fiscal year 2025 spending bill introduced in December 2024, but were stripped out of the continuing resolution that ultimately became law.

For the Public

The central consumer question flagged in the CRS report is whether broader ethanol fuel policy changes would actually lower gasoline prices. That question remains open. So does the question of who bears the infrastructure cost of installing E15-compatible blender pumps at fuel stations nationwide.

California's October 2025 decision to authorize E15 sales while state regulators review clean air compliance adds another variable. The CRS report notes that California's market entry could have significant effects on national ethanol and fuel markets, though the direction of those effects is not yet clear.

The Bottom Line

The rolling emergency waiver approach the Trump administration is using to enable E15 ethanol gasoline blend sales this summer is legally permissible, but structurally fragile. It requires the EPA to continuously re-justify an emergency that may not always exist, and it leaves fuel retailers and ethanol producers operating under persistent uncertainty. Congress has the tools to fix this permanently. Whether it can find a path between E15 supporters and those demanding RFS reforms in exchange for their votes is the question that will determine whether the current patchwork becomes policy, or whether the waiver cycle simply continues into another summer.

Access the Legis1 platform for comprehensive political news, data, and insights.