Congressional Budget Office Cost Estimate: H.R. 806: Ozone Standards Implementation Act of 2017 [open pdf - 88KB]
"H.R. 806 would delay the implementation of a final rule promulgated by the Environmental Protection Agency (EPA) in 2015 related to ambient-air-quality standards for ozone emissions. That rule, published in the Federal Register on October 26, 2015, requires states to determine whether different geographical areas in the states are in compliance with federal limits on ozone pollution and to submit plans to reduce ozone emissions to the EPA starting in 2020. The bill would delay the requirement for states to submit those plans until 2026."
Congressional Budget Office: http://www.cbo.gov/