Pima County’s Department of Environmental Quality has made its 2025 Ambient Air Monitoring Network Plan available for public review and opened a 30-day comment window that runs through June 15. The plan was placed on public inspection beginning May 15 and contains the county’s descriptions of, and proposed changes to, its air quality monitoring network. County officials say the release was made in accordance with federal requirements under 40 Code of Federal Regulations §58.10.
Aerial view of the Tucson valley and surrounding mountains — Pima County is seeking public feedback on updates to its air monitoring network and pollution rules.
The document details the configuration and components of the ambient air monitoring network as it will be maintained into 2025, including descriptions of monitoring locations and notes on any modifications or additions the department plans to make. The public release provides residents, businesses, and other interested parties an opportunity to inspect the technical and programmatic descriptions that explain how the county measures ambient air quality across the region. The plan materials are part of the county’s routine obligations related to ambient air monitoring and are being shared now to allow for public inspection and formal comment.
Residents and stakeholders may review the full plan online through the county’s air monitoring information page. In addition to the online posting, the department has made a printed copy available for in-person review at its downtown office: 33 North Stone Avenue, Suite 700 in Tucson. The office is open for plan inspection weekdays from 8:30 a.m. until 4:30 p.m., Monday through Friday, and staff are available at that location to facilitate review during regular business hours.
Public comments on the plan can be submitted in multiple ways. Individuals who prefer to provide feedback electronically may use the online public feedback form hosted on the county’s Air Monitoring web page. Those who choose to send written comments through the mail are asked to address correspondence to PDEQ, Attention: Taylor Blair, at 33 N. Stone Ave., Suite 700, Tucson, AZ 85701. All written comments must be received before the close of business on June 15 in order to be included in the public record for this planning cycle.
The county also provided a phone number for additional information: 520-724-7400. Members of the public seeking further details about the plan, the submission process, or how to access the posted materials online or at the downtown office may call that number during normal business hours. The release materials and the public comment period are part of the county’s procedural steps to ensure that the ambient air monitoring network plan is available for inspection and that community input can be captured and considered within the established timeframe.
Pima County’s announcement notes that the 2025 plan contains descriptions of the current monitoring network and any changes the Department of Environmental Quality anticipates implementing. The documentation is intended to present the county’s monitoring approach and to specify any adjustments to instruments, station locations, or monitoring priorities the department will carry forward. By making the plan available for a 30-day inspection and comment period, the county is following the procedural timetable that accompanies the annual preparation and posting of an ambient air monitoring network plan.
Those interested in submitting written feedback must ensure their comments arrive at the PDEQ office before business hours end on June 15. Electronic submissions through the public feedback form should likewise be completed by that deadline to be considered part of the 30-day comment period. The county has not specified an extension beyond June 15; comments received after the close of business on that date will not be part of this formal comment period as outlined in the release.
The Department of Environmental Quality’s posting of the 2025 Ambient Air Monitoring Network Plan and the associated public comment period are formal steps in the agency’s annual process for documenting how air quality is monitored across Pima County. The document, the in-person inspection option at 33 N. Stone Ave., Suite 700, the online feedback channel, the mailing address for written comments (PDEQ, Attention: Taylor Blair), and the phone number for additional information (520-724-7400) have been provided to ensure members of the public and stakeholders can access the plan and submit their observations, questions, or concerns during the 30-day window that runs through June 15.