Amends the Safe Drinking Water Act to require the Administrator to amend certain guidelines to require State source water assessment programs to be revised to prioritize groundwater areas and aquifers that have been contaminated, or are most vulnerable to contamination, by MTBE.
Revises the oxygen content requirement for reformulated gasoline under the Clean Air Act to require the oxygen content to equal or exceed an average of two percent by weight (currently, equal or exceed two percent by weight). Invalidates Federal regulations that establish a per-gallon minimum oxygen content (percent, by weight).
Limits the hydrocarbon content of reformulated gasoline to the average content of such gasoline sold in covered nonattainment areas during the year 2000.
Expresses the sense of Congress that the United States should promote renewable ethanol to replace MTBE and encourage oil refiners to make the transition from MTBE-blended fuel to ethanol-blended fuel as soon as possible.