Maricopa County, AZ Environmental Rules: Flood Zones (2026)
FEMA flood zone rules in Maricopa County, AZ, also called floodplain regulations or special flood hazard area (SFHA) rules, determine flood insurance requirements and elevation standards for new construction.
Key Facts
- Authority
- Flood Control District of Maricopa County
- Permit
- Floodplain Use Permit required in SFHA
- Primary Risk
- Desert flash flooding along washes
- NFIP
- County participates in NFIP
- State Law
- ARS 48-3601+ flood control authority
Summary
The Flood Control District of Maricopa County (FCDMC) manages floodplain regulations for unincorporated areas and 14 municipalities. Development in FEMA-designated Special Flood Hazard Areas requires a Floodplain Use Permit. Desert flash flooding along washes and arroyos is the primary flood risk. Building in or near washes requires flood control approval. The county participates in the National Flood Insurance Program (NFIP).
FEMA Flood Map Service Center: Welcome! Looking for a Flood Map? Enter an address, a place, or longitude/latitude coordinates: Looking for more than just a current flood map? Visit Search All Products to access the full range of flood risk products for your community. About Flood Map Service Center The FEMA Flood Map Service Center (MSC) is the official public source for flood hazard information produced in support of the National Flood Insurance Program (NFIP). Use the MSC to find your official flood map, access a range of other flood hazard products, and take advantage of tools for better understanding flood risk. FEMA flood maps are continually updated through a variety of processes. Effective information that you download or print from this site may change or become superseded by new maps over time.
Full Breakdown
FCDMC enforces floodplain regulations under authority from ARS 48-3601+. Floodplain Use Permits are required for construction, grading, or filling in Special Flood Hazard Areas. Finished floor elevations must be elevated above the base flood elevation. Drainage plans must address on-site and off-site stormwater capture and conveyance. Building permits in flood-prone areas require FCDMC review and approval.
Frequently Asked Questions
Do I need a permit to build near a wash in Maricopa County?
How do I find out if my property is in a flood zone?
Sources & Official References
- [1]Source
Other rules in Maricopa County
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