Environmental Rules in Oro Valley, AZ (2026)
4 verified environmental rules for Oro Valley, Arizona, sourced directly from the municipal code and official government pages.
Verified from official government sources
Stormwater Management
Oro Valley enforces stormwater management through its MS4 permit under the Clean Water Act. New development must retain the first-flush storm event on site.
Oro Valley Stormwater Management
Heavy RestrictionsErosion Control
Oro Valley requires erosion and sediment control plans for all grading activity. The Town enforces strict hillside protections including NAOS preservation and slope disturbance limits.
Oro Valley Erosion Control Requirements
Heavy RestrictionsFlood Zones
Oro Valley participates in the NFIP and enforces floodplain rules exceeding FEMA minimums. Development along Canada del Oro Wash requires floodplain use permits and 1-foot freeboard.
Oro Valley Floodplain Regulations
Heavy RestrictionsGrading & Drainage
Oro Valley requires grading permits for disturbance exceeding 50 cubic yards. Drainage reports must show post-development runoff does not exceed pre-development levels.
Oro Valley Grading and Drainage Permits
Heavy RestrictionsLooking for Pima County county-wide rules?
County ordinances apply to unincorporated areas and may supplement Oro Valley city rules.
Environmental Rules in Pima County →