40 CFR 50.16 - National primary and secondary ambient air quality standards for lead.

Status message

There is 1 rule appearing in the Federal Register for 40 CFR Part 50. View below or at eCFR (GPOAccess)
§ 50.16 National primary and secondary ambient air quality standards for lead.
(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.
[73 FR 67052, Nov. 12, 2008]

Title 40 published on 2014-07-01.

The following are only the Rules published in the Federal Register after the published date of Title 40.

For a complete list of all Rules, Proposed Rules, and Notices view the Rulemaking tab.

  • 2015-03-06; vol. 80 # 44 - Friday, March 6, 2015
    1. 80 FR 12264 - Implementation of the 2008 National Ambient Air Quality Standards for Ozone: State Implementation Plan Requirements
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Final rule.
      This final rule is effective on April 6, 2015.
      40 CFR Parts 50, 51, 52, 70, and 71

This is a list of United States Code sections, Statutes at Large, Public Laws, and Presidential Documents, which provide rulemaking authority for this CFR Part.

This list is taken from the Parallel Table of Authorities and Rules provided by GPO [Government Printing Office].

It is not guaranteed to be accurate or up-to-date, though we do refresh the database weekly. More limitations on accuracy are described at the GPO site.


United States Code

Title 40 published on 2014-07-01

The following are ALL rules, proposed rules, and notices (chronologically) published in the Federal Register relating to 40 CFR Part 50 after this date.

  • 2015-04-03; vol. 80 # 64 - Friday, April 3, 2015
    1. 80 FR 18177 - Fine Particulate Matter National Ambient Air Quality Standards: State Implementation Plan Requirements
      GPO FDSys XML | Text
      ENVIRONMENTAL PROTECTION AGENCY
      Notice of public hearing and extension of comment period.
      Public Hearing. The public hearing will be held on April 29, 2015, in Washington, DC Please refer to SUPPLEMENTARY INFORMATION for additional information on the public hearing. Comments . Comments must be received on or before May 29, 2015.
      40 CFR Parts 50, 51, and 93