In United States environmental law, a non-attainment area is an area considered to have air quality worse than the National Ambient Air Quality Standards as defined in the Clean Air Act Amendments of 1970 (P.L. 91-604, Sec. 109). Non-attainment areas must have and implement a plan to meet the standard, or risk losing some forms of federal financial assistance. An area may be a non-attainment area for one pollutant and an "attainment area" for others.
- New York/New Jersey/Philadelphia Metropolitan Area Airspace 2007 -In summary: An attainment area is any area that meets the national primary or secondary ambient air quality standard for a given pollutant
- This article incorporates public domain material from the Congressional Research Service document: Jasper Womach. "Report for Congress: Agriculture: A Glossary of Terms, Programs, and Laws, 2005 Edition" (PDF).
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