Stormwater Management: Midway City vs Mission Viejo
How do stormwater management rules compare between Midway City, CA and Mission Viejo, CA?
Midway City and Mission Viejo have similar restriction levels.
Midway City, CA
Orange County
Orange County enforces stormwater quality under two Phase I NPDES MS4 Permits issued by the Santa Ana and San Diego Regional Water Quality Control Boards. Title 9 of the OCCO (Water Quality) and the NPDES program require all construction and development projects in unincorporated areas to implement Best Management Practices (BMPs) and submit a Water Quality Management Plan (WQMP) before grading or building permits are issued.
View full Midway City rules →Mission Viejo, CA
Orange County
Orange County enforces stormwater quality under two Phase I NPDES MS4 Permits issued by the Santa Ana and San Diego Regional Water Quality Control Boards. Title 9 of the OCCO (Water Quality) and the NPDES program require all construction and development projects in unincorporated areas to implement Best Management Practices (BMPs) and submit a Water Quality Management Plan (WQMP) before grading or building permits are issued.
View full Mission Viejo rules →Key Facts Comparison
| Fact | Midway City | Mission Viejo |
|---|---|---|
| Governing Code | OCCO Title 9 / NPDES MS4 Permits | OCCO Title 9 / NPDES MS4 Permits |
| WQMP Required | Before grading/building permit | Before grading/building permit |
| ESCP Required | All grading plan submittals | All grading plan submittals |
| Permittees | 34 co-permittees countywide | 34 co-permittees countywide |
| Enforcement | OC Public Works / RWQCB | OC Public Works / RWQCB |
Highlighted rows indicate differences between cities.
Midway City FAQ
Do I need a stormwater plan for construction in unincorporated Orange County?
Yes. All non-exempt construction projects must submit a Water Quality Management Plan (WQMP) and an Erosion and Sediment Control Plan (ESCP) before obtaining grading or building permits from OC Development Services.
Who enforces stormwater regulations in unincorporated Orange County?
OC Public Works and the Regional Water Quality Control Boards (Santa Ana for North OC, San Diego for South OC) enforce NPDES stormwater requirements. The H2OC program coordinates regional compliance.
Mission Viejo FAQ
Do I need a stormwater plan for construction in unincorporated Orange County?
Yes. All non-exempt construction projects must submit a Water Quality Management Plan (WQMP) and an Erosion and Sediment Control Plan (ESCP) before obtaining grading or building permits from OC Development Services.
Who enforces stormwater regulations in unincorporated Orange County?
OC Public Works and the Regional Water Quality Control Boards (Santa Ana for North OC, San Diego for South OC) enforce NPDES stormwater requirements. The H2OC program coordinates regional compliance.
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