# Federal Register #EPA-R09-OAR-2026-5710

EPA proposes approval of Maricopa County landfill-emissions plan

**Posted:** November 05, 2026
**Respond By:** December 08, 2026
**Identifier:** EPA-R09-OAR-2026-5710

The U.S. Environmental Protection Agency is proposing approval of Maricopa County’s landfill-emissions plan, a regulatory action rather than a procurement.
- **Government agencies:** U.S. Environmental Protection Agency (EPA), Region IX; Maricopa County Air Quality Department (MCAQD).
- **Proposed action:** Approve Maricopa County’s Clean Air Act section 111(d) plan for existing municipal solid waste landfills.
- **Key requirements:** The plan addresses landfill gas and its components and would incorporate relevant federal emissions guidelines into Maricopa County rules.
- **Procurement details:** No products, services, quantities, part numbers, OEMs, or vendors are identified.

### Description

The Environmental Protection Agency is proposing to approve a State plan submitted by the Maricopa County Air Quality Department for regulating landfill gas and its components from existing municipal solid waste landfills. The plan was submitted under Clean Air Act section 111(d) in response to EPA emissions guidelines for these landfills. The proposed approval is limited to relevant provisions of 40 CFR parts 60 and 62, and EPA proposes to amend 40 CFR part 62 to reflect the action. Written comments must be received by December 7, 2026.

[View original listing](https://www.federalregister.gov/documents/2026/11/05/2026-22585/approval-and-promulgation-of-state-plans-for-designated-facilities-and-pollutants-arizona-control-of)