Flood Zones: Green Valley vs Marana
How do flood zones rules compare between Green Valley, AZ and Marana, AZ?
Green Valley and Marana have similar restriction levels.
Green Valley, AZ
Pima County
Pima County Regional Flood Control District administers the Floodplain Management Ordinance (Title 16, Ordinance 2010-FC5). The District maps both FEMA FIRMs and local Special Study Floodplains covering more than half of known county flood hazards. FEMA updated Pima County flood maps January 2026 (appeal through April 29, 2026). Building in/near washes requires flood control approval.
View full Green Valley rules →Marana, AZ
Pima County
Marana LDC §17-15-10 governs flood hazard reduction. Pima County Regional Flood Control District and FEMA FIRMs apply. FEMA updated Pima County flood maps January 2026 (appeal through April 29, 2026). Santa Cruz River and Tortolita fan washes create significant local flood risk.
View full Marana rules →Key Facts Comparison
| Fact | Green Valley | Marana |
|---|---|---|
| Ordinance | Title 16 (Ord. 2010-FC5) | - |
| Flood District | Pima County RFCD: 520-724-4600 | Pima County RFCD: 520-724-4600 |
| FEMA Maps | Updated Jan 2026; appeal by Apr 29 2026 | Updated Jan 2026; appeal by Apr 29 2026 |
| Special Studies | District maps fill FEMA gaps | - |
| Permit Trigger | 100+ cfs peak discharge floodplain | - |
| Primary Hazard | Desert wash/arroyo flash flooding | - |
| Code Section | - | Marana LDC §17-15-10 |
| Local Hazards | - | Santa Cruz River, Tortolita fan washes |
| Mfr. Homes | - | Floodplain Use Permit after 180 days |
Highlighted rows indicate differences between cities.
Green Valley FAQ
Is my property in a flood zone in Pima County?
Pima County Regional Flood Control District administers the Floodplain Management Ordinance (Title 16, Ordinance 2010-FC5). The District maps both FEMA FIRMs and local Special Study Floodplains covering more than half of known county flood hazards. FEMA updated Pima County flood maps January...
Do I need flood insurance in Pima County?
Ordinance: Title 16 (Ord. 2010-FC5). Flood District: Pima County RFCD: 520-724-4600. FEMA Maps: Updated Jan 2026; appeal by Apr 29 2026. Special Studies: District maps fill FEMA gaps.
Marana FAQ
Is my property in a flood zone in Marana?
Marana LDC §17-15-10 governs flood hazard reduction. Pima County Regional Flood Control District and FEMA FIRMs apply. FEMA updated Pima County flood maps January 2026 (appeal through April 29, 2026). Santa Cruz River and Tortolita fan washes create significant local flood risk.
Do I need flood insurance in Marana?
Code Section: Marana LDC §17-15-10. FEMA Maps: Updated Jan 2026; appeal by Apr 29 2026. Flood District: Pima County RFCD: 520-724-4600. Local Hazards: Santa Cruz River, Tortolita fan washes.
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