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Ambient Monitoring Technology Information Center (AMTIC)

Monitoring Regulations

Select one of the topics below to jump directly to the associated monitoring requirements:

General Monitoring Requirements

2016 EPA Finalizes Amendments to its National Air Quality Monitoring Requirements
March 10, 2016 – This final rule revises monitoring regulations to update requirements as needed to address new technology, and to reorganize and clarify quality assurance sections of the monitoring rules.

2006 - EPA Finalizes Amendments to its National Air Quality Monitoring Requirements
September 28, 2006 - This final rule includes changes to PM2.5 monitoring associated with the 2006 NAAQS review as well as changes to ambient air monitoring and quality assurance requirements associated with the National Ambient Air Monitoring Strategy. Revisions to the PM NAAQS are provided in a separate rule.

Particulate Matter

2012 - EPA Revises the National Ambient Air Quality Standards for Particle Pollution
December 14, 2012 - This final rule includes both ambient air monitoring and NAAQS changes in one rule.

1997 - EPA Finalizes Revised Requirements for Designation of Reference and Equivalent Methods for PM2.5 and Ambient Air Quality Surveillance for Particulate Matter
July 18, 1997 - EPA has revised the ambient air quality surveillance regulations to include provisions for PM2.5 (particulate matter with an aerodynamic diameter less than or equal to a nominal 2.5 micrometers), as measured by a new reference method being published in 40 CFR part 50, Appendix L, or by an equivalent method designated in accordance with requirements being promulgated in 40 CFR Part 53. Part 50 revisions, including the PM2.5 FRM, are included in the Final PM NAAQS Rule.

Ground-Level Ozone

2019 - EPA Revises Start Date for the Photochemical Assessment Monitoring Stations (PAMS).
December 20, 2019 - EPA is extending the start date for the required PAMS sites from June 1, 2019, to June 1, 2021. This extension is being made to give states more time to acquire the necessary equipment and expertise needed to successfully make the required PAMS measurements.

2015 - EPA Revises the National Ambient Air Quality Standards for Ozone
October 26, 2015 – This final rule includes changes to the ozone and ozone precursor monitoring requirements associated with the 2015 Ozone NAAQS review.

Other Air Pollutants

See the AMTIC Lead Monitoring page

Carbon Monoxide
See Carbon Monoxide Regulatory Actions

Nitrogen Dioxide
See Nitrogen Dioxide Regulatory Actions

Sulfur Dioxide
See Sulfur Dioxide Regulatory Actions