Current Regulations: An appropriations bill was signed by the Governor on May 24, 1999, which included a cap on MTBE in gasoline at retail of two % by volume effective February 1, 2000. See House File 772, Sec. 15.

Senate File 2430, signed by the Governor on May 11, 2000, prohibits more than trace amounts of MTBE (not more than 0.5 vol%) in gasoline; see Iowa Code sections 214A.18 and 214A.2, subsection 5.

The Iowa Administrative Code includes ASTM motor vehicle fuel tests and standards at 21-85.33, enforced by the Iowa Department of Agriculture and Land Stewardship. Also see Iowa Code at 214A.2.  

In a multi-state letter dated 8/31/17, to address a fuel supply emergency caused by Hurricane Harvey, EPA allowed 11.5 psi RVP gasoline throughout the state through September 15.  

Proposed State Actions: Iowa will initiate a rulemaking to adopt the recent ASTM standards, but will delay enforcement of diesel lubricity until October 2005, per a memo dated December 7, 2004 from the Iowa Secretary of Agriculture.

Legislature: Introduced in February 2011, SF 284 would prohibit the sale of unblended gasoline (that does not contain ethanol), except for aircraft, motor sports, older vehicles, snowmobiles, all-terrain vehicles, watercraft, and lawn mowers; effective 1/1/12. SF 164, introduced in February 2011, would require 5% biodiesel, except for a motor located at an electric generating plant regulated by the U.S. Nuclear Regulatory Commission, railroad locomotives, public airport vehicles, and temporary peak or back-up power generation; effective 9/1/12.

SF 2107 (introduced in Jan. 2010) and SF 2359 (introduced in Feb. 2010) would require that retailers not sell gasoline that is not blended with ethanol (except to aircraft, motor sports, antique vehicles, snowmobiles, watercraft, lawn mowers or other garden equipment powered by a small motor) effective 1/1/11. Introduced in February 2010, House Study Bill 717, section 11, would require diesel fuel to be B5 or higher except for (section 12) an electric utility generating plant regulated by the Nuclear Regulatory Commission, locomotives, a vehicle used primarily at a public airport, or a motor used to temporarily generate power; section 13 would allow existing diesel fuel to be sold; effective 1/1/12 (section 14).

Introduced in March 2009, SF 294, SF 408 and SF 464 would require 5 vol% biodiesel effective 7/1/09, increasing to 10 vol% except Nov-March beginning 7/1/12.

SF 2181, introduced in February 2008, would increase the minimum content of ethanol blended gasoline from 10 vol% to 20 vol% effective six months after the IA Secretary of Agriculture publishes a notice certifying that EPA has approved the use of the higher blend.

Several bills were introduced in January and March 2006 (i.e., HF 2735, HF 2754, SF 2129, SF 2130, SF 2383, SF 2385) that would establish petroleum replacement goals promoting ethanol and biodiesel.

Introduced in February 2005, SF 96 and SF 99 would prohibit the sale of gasoline with less than 10 vol% ethanol (with some exceptions), and revise excise tax rates (with a higher excise tax on gasoline with less than 10vol% ethanol), effective 1/1/06. HF 562, introduced in March 2005, is the companion bill to SF96 and SF99.

Legislation was introduced in Jan. and Feb. 2001 to require the sale of oxygenated gasoline at retail and to repeal a one cent per gallon reduction in the state excise tax on gasoline that contains 10 vol% ethanol. See Senate File 38 and House File 234.

Legislation introduced in 1999 (see Senate File 400) was revised and introduced in Feb. 2000 that would require that gasoline must contain at least 3.5 wt% oxygen content, with a few exceptions (e.g., not applicable to aircraft or racing vehicles). Unoxygenated gasoline would have to be premium grade unleaded gasoline. It would also require a pump label either that identifies the oxygenate type or as unoxygenated effective Jan. 1, 2001. An excise tax of eight cents per gallon of aviation gasoline would be imposed. The one cent per gallon reduction in the state excise tax on gasoline that contains ethanol would be repealed. See Senate File 2087.

A bill was introduced in the State Senate in 1999 that would require 3.5 wt% oxygen content gasoline at retail statewide by October 21, 2000. See Senate File 400. A committee of the Iowa General Assembly convened a hearing on September 16, 1999 in Oskaloosa, Iowa. On September 28, 1999, Iowa's attorney general issued an informal opinion that the state's secretary of agriculture cannot require that no gasoline can be sold in Iowa unless it has ethanol in it; furthermore, any legislative effort should consider federal Clean Air Act preemption and constitutional Commerce Clause issues. 

Last updated September 2017