Title 42 › CHAPTER 85 — AIR POLLUTION PREVENTION AND CONTROL › SUBCHAPTER I — PROGRAMS AND ACTIVITIES › Part A — Air Quality and Emission Limitations › § 7409
The Administrator must set national primary and secondary air quality standards for every pollutant that has official air quality criteria. Within 30 days after December 31, 1970, the Administrator must publish proposed standards, and no later than 90 days after that first publication must finalize them after allowing written comments. For any pollutant with criteria issued after December 31, 1970, proposed standards must be published at the same time the criteria are issued and then finalized using the same comment process. Primary standards must protect public health with an adequate margin of safety. Secondary standards must protect the public welfare from known or expected harms. The Administrator must set a primary short-term NO2 standard (for up to a 3-hour period) no later than one year after August 7, 1977, unless there is no significant evidence it is needed. The Administrator must review and, if needed, revise the criteria and standards by December 31, 1980, and every five years after that (earlier reviews are allowed). An independent seven-member scientific committee (including at least one National Academy of Sciences member, one physician, and one state air agency representative) must review the criteria and standards by January 1, 1980, and every five years, and advise on research needed, sources of pollution (natural vs. human), and any health, welfare, social, economic, or energy effects of control strategies.
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The Public Health and Welfare, Source: USLM XML via OLRC
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Reference
Citation
42 U.S.C. § 7409
Title 42, The Public Health and Welfare
Last Updated
Sep 22, 2026
Release point: 119-110