Erosion Control: Green Valley vs Marana
How do erosion control rules compare between Green Valley, AZ and Marana, AZ?
Green Valley and Marana have similar restriction levels.
Green Valley, AZ
Pima County
Pima County requires erosion and sediment control plans for all grading and construction activities in unincorporated areas. The Sonoran Desert landscape with sparse vegetation and intense monsoon rainfall makes erosion control critical. Grading permits through Development Services require detailed erosion mitigation before work begins.
View full Green Valley rules →Marana, AZ
Pima County
Marana enforces erosion and sediment control through the Land Development Code grading and drainage provisions and the EPA NPDES stormwater permit program. Construction sites disturbing one acre or more must obtain an Arizona Pollutant Discharge Elimination System (AZPDES) Construction General Permit.
View full Marana rules →Key Facts Comparison
| Fact | Green Valley | Marana |
|---|---|---|
| Authority | Title 18 Floodplain/Erosion Code | - |
| Dust Permit Trigger | 0.1 acres disturbance | - |
| Key Risk | Monsoon rainfall 1-2 in/hr | - |
| Native Revegetation | Required in plans | - |
| Permits | Development Services grading | - |
| Threshold | - | 1+ acre disturbance requires AZPDES CGP |
| SWPPP | - | Required for all permitted sites |
| Local Enforcement | - | Building inspectors verify controls |
| ADEQ Penalty | - | Up to $25,000/day |
| Flood District | - | Pima County RFCD has co-jurisdiction |
Highlighted rows indicate differences between cities.
Green Valley FAQ
When is an erosion control plan required in Pima County?
Any grading or land-disturbing activity in unincorporated Pima County requires an erosion control plan submitted with the grading permit. Sites disturbing 0.1 acres or more also need a dust control plan filed with ADEQ.
What erosion control methods are required in Pima County?
Common required measures include silt fencing, stabilized construction entrances, temporary sediment basins, dust suppression (watering), and revegetation with native Sonoran Desert plant species. Specific requirements depend on site slope and proximity to washes.
Marana FAQ
Do I need an erosion control plan for my Marana building project?
Yes, for any project involving grading or land disturbance. Sites of one acre or more also need an AZPDES Construction General Permit from ADEQ with a Stormwater Pollution Prevention Plan.
Who enforces erosion control in Marana?
Both Marana building inspectors and ADEQ enforce erosion control requirements. The Pima County Regional Flood Control District also has authority over erosion along washes and floodplain areas.
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