EPA Backs Arizona's PM10 Pollution Permits in West Pinal
Published Date: 12/11/2025
Rule
Summary
The EPA just gave a big thumbs-up to Arizona’s plan for controlling dust pollution (PM10) from big factories in West Pinal County. Starting January 12, 2026, new permits will make sure these sources keep the air cleaner and healthier. This means businesses must follow updated rules, helping the community breathe easier without extra costs right now.
Analyzed Economic Effects
3 provisions identified: 1 benefits, 1 costs, 1 mixed.
Major Sources Must Follow NNSR Permits
Starting January 12, 2026, major stationary sources in the West Pinal PM10 nonattainment area are subject to Nonattainment New Source Review (NNSR) permitting for PM10 precursor emissions under the approved Arizona SIP. If you operate a major source in West Pinal, you are covered by the State’s NNSR permitting program that the EPA has just fully approved.
No New Federal Burden For Small Entities
The EPA action approves the State program and does not impose requirements beyond those in state law. The rule is certified as not having a significant economic impact on a substantial number of small entities under the Regulatory Flexibility Act.
Approval Does Not Apply To Tribal Lands
The EPA approval of the Arizona SIP is not approved to apply on any Indian reservation land or in other areas where an Indian Tribe has demonstrated jurisdiction. In those areas of Indian country, the action does not have Tribal implications and will not impose substantial direct costs on Tribal governments.
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