40 CFR 50.16
§ 50.16 National primary and secondary ambient air quality standards for lead.
United States · 40 CFR — Protection of Environment · Status: effective
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- Citation
- 40 CFR 50.16, § 50.16 National primary and secondary ambient air quality standards for lead, United States, version 1 as recorded 2026-07-09, yourstate.us, https://yourstate.us/provision/169706
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Full text
(a) The national primary and secondary ambient air quality standards for lead (Pb) and its compounds are 0.15 micrograms per cubic meter, arithmetic mean concentration over a 3-month period, measured in the ambient air as Pb either by:
(1) A reference method based on appendix G of this part and designated in accordance with part 53 of this chapter or;
(2) An equivalent method designated in accordance with part 53 of this chapter.
(b) The national primary and secondary ambient air quality standards for Pb are met when the maximum arithmetic 3-month mean concentration for a 3-year period, as determined in accordance with appendix R of this part, is less than or equal to 0.15 micrograms per cubic meter.
Legislative history
This is a federal regulation, adopted through agency rulemaking under the Administrative Procedure Act — not enacted by a recorded vote of Congress.