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Please enjoy our newsletter.
We look forward to working with you!
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As Maricopa County residents prepare for the upcoming spring and summer months, the Maricopa County Air Quality Department (MCAQD) would like to bring awareness to the dust caused by the improper removal of weeds. Higher concentrations of dust in the air that we breath can be a nuisance and present health risks to the community. MCAQD encourages property owners to take necessary steps to ensure weed removal activities do not contribute to air pollution. |
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Emissions Inventory Deadline
The 2024 annual emissions inventory is due April 30, 2025. If your facility is required to submit an emissions inventory, you would have received an email in January. If you have not already done so, please submit your emissions inventory as soon as possible.
MCAQD provides resources that can be used to prepare and submit the emissions inventory. Facilities that need assistance navigating the emissions inventory task in the AQD Online Portal are encouraged to schedule a meeting with staff from the Emissions Inventory Unit.
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General Permit Renewal
The general permit for Surface Coating and/or Abrasive Blasting Operations will expire on June 14, 2025. Permits must be renewed through the AQD Online Portal prior to the expiration date. MCAQD offers a step-by-step guide for completing the renewal application, but if additional help is needed please contact the Business Assistance Unit at 602-506-5102 or at AQBusinessAssistance@maricopa.gov.
Helpful Tip – Did you know that an SCS IMPACT account for the AQD Online Portal is designed for individuals rather than companies? There is no limit to the number of users who can be assigned Certifier or Preparer access to your facilities. To ensure operational continuity and a reliable backup, it is recommended that at least two individuals maintain access. Designated users should follow the available guidance to create their accounts.
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Maricopa County residents are familiar with intense summer heat. What many don’t realize is that harmful air pollutants also increase during the summer. Ground-level ozone forms when daily activities such as driving create emissions which then react to the Valley’s intense sunlight and heat. This pollution affects everyone’s health, especially the young and elderly. At ground level, ozone can trigger chest pain, coughing, throat irritation, and congestion.
By making a commitment of at least one day a week, county residents can help keep ozone away. Drive less, telework, carpool, bike to work, use public transit, and refuel after dark.
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Download the Clean Air App to receive real-time information about air quality in Maricopa County and to find out when there is a High Pollution Advisory. Best of all, it’s free!
 
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As air pollution continues to impact Maricopa County and surrounding areas, the Ground Level Ozone Research (GLOR) Project intends to provide a better understanding of the roles that wind transport, emissions of pollutants, and chemical reactions in the atmosphere play in ozone formation.
The project will position air monitoring instruments at four MCAQD air monitoring sites and two Arizona Department of Environmental Quality (ADEQ) air monitoring sites throughout Maricopa County. The project will also use MCAQD emissions inventories to perform data analysis to create a model for ozone production. The model will be used to evaluate the impacts of reductions in manmade precursor emissions in the Intermountain West nonattainment areas.
The GLOR Project includes partners from across the state and nation including MCAQD, ADEQ, Environmental Protection Agency, Arizona State University, National Aeronautics and Space Administration, Arizona Public Service, and others.
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On February 6, 2025, MCAQD issued substantive policy statement SPS-2024-002-Approval of Alternative Test Method Use. SPS-2024-002 applies to regulated sources that wish to use alternative test methods. This policy statement serves as written approval from the Control Officer for a source to use EPA-approved alternative test methods provided the source complies with the quality control and quality assurance procedures and the specified applicability provisions. |
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The MCAQD Rules Unit is working on revisions to the following six rules:
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Rule 204 (Emission Reduction Credit (ERC) Generation, Certification, and Use)
Next up: Conduct a stakeholder workshop, date TBD
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Rule 205 (Emission Offsets Generated by Voluntary Mobile Source Emission Reduction Credits)
Next up: Public hearing to consider adoption of the revisions on May 21, 2025
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Rule 230 (General Permits)
Next up: Present to the Maricopa County Board of Health on April 28, 2025
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Rule 240 (Federal Major New Source Review)
Next up: Present to the Maricopa County Board of Health on April 28, 2025
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Rule 352 (Gasoline Cargo Tank Testing and Use)
Next up: Public comments are due by April 30, 2025
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Rule 353 (Storage and Loading of Gasoline at a Gasoline Dispensing Facility)
Next up: Public comments are due by April 30, 2025
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If you are interested in following any of the rulemakings please sign up to receive notifications on the Maricopa County Enhanced Regulatory Outreach Program website. |
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Memorial Day
May 26, 2025
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Independence Day
July 4, 2025
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Labor Day
September 1, 2025
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The MCAQD Business Assistance Unit provides information and technical assistance related to air quality rules and regulations. This includes training, rule interpretation and education, a formal case review process for violations, and other resources for facilities. |
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Did you know you can request a courtesy site visit?
Fill out a quick online form by clicking the button below and we will contact you to set up a time for our visit.
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New Training Video!
The Business Assistance Unit recently partnered with Crash Champions to create a training video that addresses air quality regulations for vehicle refinishing operations.
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