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Regulatory Departments Maricopa County's Enhanced Regulatory Outreach Program (EROP) departments seek to ensure the safety and well-being of our community. Because we understand that regulations and rule-making decisions, discussions, and meetings can be confusing, we have developed this web-site to allow citizens to easily monitor and engage in the adoption and amendment of all regulations.


Your input is especially important. By accessing the Comments page, you can provide feedback concerning regulations you are particularly interested in.



Air QualityThe Maricopa County Air Quality Department is a regulatory agency whose goal is to ensure federal clean air standards are achieved and maintained for the residents and visitors of Maricopa County. The Maricopa County Air Quality Department is governed by the Maricopa County Board of Supervisors and follows air quality standards set forth by the federal Clean Air Act.


The department has statutory authority (ARS §49-402.B) for air quality programs and receives direct delegation/authority from the Environmental Protection Agency for certain air quality programs. In addition, the department has responsibility through a formal agreement with ADEQ and MAG for emission inventories, air quality monitoring data and its Trip Reduction Program.


The Maricopa County Air Quality Department's Planning & Analysis Division is responsible for drafting and finalizing air pollution control rules and ordinances and for compiling emissions inventories. Rules and ordinances are created and revised to comply with the Clean Air Act and to implement control strategies for stationary sources in Maricopa County. Emissions inventories are a comprehensive listing, by source, of air pollutant emissions. Emissions inventories cover point sources (large industries), area sources (numerous small sources such as gas stations and consumer products usage), mobile sources (both on-road and off-road) and biogenic sources (gases released by plants and soil).


The division also works with the Maricopa Association of Governments, the Arizona Department of Environmental Quality and the Arizona Department of Transportation to develop State Implementation Plans (SIP), policies/guidelines and reports required to complete SIP analyses. A SIP is a cumulative record of all air pollution control strategies, state statutes, state and local rules and local ordinances implemented by governmental agencies within Arizona.


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Environmental ServicesMaricopa County Environmental Services provides essential, regional environmental services seeking to prevent and remove environmental health risks. The Department’s Environmental Health Specialists and Field Technicians are in the community every day making sure that among other things, food in all the eating and drinking establishments in the County is protected from contamination, that water supplies throughout the County are safe to drink, and that vector borne health illnesses and risks are minimized. It is our belief that with continued support, future generations will reap the benefits of today’s actions.


The Maricopa County Environmental Health Code is adopted under authority vested in the Maricopa County Board of Health and the Maricopa County Board of Supervisors pursuant to the Arizona Revised Statues § 36-136, 36-183.02, 36-601, 36-184.B4, 36-187.C, 11-251 paragraphs 17 and 31, 49-106, and 49-107. The provisions of this Code are applicable to the unincorporated areas lying within the boundaries of Maricopa County, and the incorporated areas lying within the boundaries of Maricopa County, and the incorporated cities and towns whose governing bodies specifically request the services of the Maricopa County Environmental Services Department.


Flood ControlEstablished in 1959 by the Maricopa County Board of Supervisors per state legislation, the Flood Control District of Maricopa County is responsible for protecting lives and property from flooding hazards. The District achieves this goal through four strategic programs: 1) identification of flooding hazards; 2) construction and maintenance of flood control dams, basins and channels; 3) regulation of development in floodplains; and 4) public outreach programs to educate citizens about flooding hazards and safety. The Maricopa County Board of Supervisors serves as the District's Board of Directors. A secondary property tax on parcels within Maricopa County provides the majority of the District's funding.


Regulatory functions of the District include floodplain management, permitting for floodplain use and sand & gravel operations, and floodplain delineations and mapping. Arizona Revised Statutes §48-3601 through 48-3650 direct each county Flood Control District Board of Directors to adopt and enforce floodplain regulations consistent with criteria adopted by the Arizona Department of Water Resources. The Floodplain Regulations for Maricopa County have been in force since February 25, 1974 and are posted on the District’s website. The Regulations define the usage rules, development restrictions and permitting requirements necessary to protect the environmental and flood control qualities of floodplains.


The District performs floodplain delineation studies to determine the location of 100-year floodplains (one percent annual chance flooding event) throughout Maricopa County. Floodplain delineations are a complex process of land surveying and scientific computer modeling. Once a floodplain has been delineated, the data is used for management purposes to reduce or prevent flood damage to development, to maintain the beneficial functions of the floodplains, and by the Federal Emergency Management Agency (FEMA) to update the Flood Insurance Rate Maps (FIRM) in the National Flood Insurance Program.

Property located in a Special Flood Hazard Area (100-year floodplain) may be required to be protected by flood insurance. District Floodplain Representative staff can assist a citizen in determining whether or not property is located in a flood hazard area. Besides purchasing flood insurance, there may be physical changes that can be done to a property to protect it from flood damage.

A floodplain use permit is required to make any changes to property located in a Special Flood Hazard Area. The District is required to ensure structures or improvements in the floodplain will not cause adverse impacts to properties upstream or downstream.

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Procurement ServicesThe Office of Procurement Services facilitates contracts for the purchase of goods and services used by all county agencies. The mission of the Procurement Services is to provide innovative, cost-effective and quality services through a strategic and systematic approach to procurement.



Planning and DevelopmentThe Maricopa County Planning & Development Department is governed by the Maricopa County Board of Supervisors. The department has statutory authority per Title 11 of the Arizona Revised Statutes for land use planning, zoning, land subdivision and construction permitting programs.


The department is responsible for drafting and amending regulations related to land use planning, zoning, land subdivision and construction permitting, which include the Maricopa County Zoning Ordinance, Maricopa County Subdivision Regulations, Maricopa County Abatement Ordinance, Maricopa County Addressing Regulations, Maricopa County Adult Business Ordinance, Maricopa County Hours of Construction Ordinance, and the Maricopa County Local Additions & Addenda (adopted construction safety codes). The department will also draft ordinances at the direction of the Maricopa County Board of Supervisors.


Department of TransportationMaricopa County Department of Transportation (MCDOT) plans, designs, constructs, and maintains roadways primarily within the unincorporated areas of the county. MCDOT currently operates and maintains approximately 2,500 miles of roadway, more than 80 bridges, over 325 culverts, more than 160 signalized intersections, and approximately 35,000 traffic signs. MCDOT’s funding is primarily derived from Highway User Revenue Fund (HURF) monies and some federal-aid highway funding.


MCDOT’s mission is to provide transportation infrastructure (primarily roads) and related services to the people within Maricopa County so they can live, work, conduct business, and travel in a safe environment. MCDOT is led by the Transportation Director and is governed by the Maricopa County Board of Supervisors.


The statutory authority for MCDOT’s work is derived primarily from A.R.S. Title 11, Chapter 2, Article 4 (Board of Supervisors), Title 11, Chapter 3, Article 9 (County Engineer) and Title 28, Chapter 19, Article 1 (County Highways). The Department’s work is largely governed by the transportation laws of the State of Arizona (A.R.S. Title 28, generally).


MCDOT is largely a full service transportation agency, but does have some limited regulatory roles. These relate to adherence to County road standards, review of all development submittals that have impacts to county roads, and ensuring safe and responsible work in County right-of-way. MCDOT also works very closely with the Arizona Department of Transportation (ADOT), the Maricopa Association of Governments (MAG), incorporated cities, towns, and Indian communities.

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Maricopa County Regulations
Phone: 602.506.7167 | Fax: 602.506.3951
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