California SWPPP inspection requirements
- Rain trigger
- 0.25″ storm event
- Post-rain deadline
- Within 24 hours — weekends count
- Routine inspections
- Every 7 days
- Permit
- Construction General Permit (Order 2022-0057-DWQ)
- Agency
- State Water Resources Control Board (SWRCB)
Verify against your permit. These values reflect the most common reading of California's program; permits change and projects vary. The official permit text from SWRCB controls.
How California handles construction stormwater
Construction sites in California disturbing one acre or more need coverage under the Construction General Permit (Order 2022-0057-DWQ), administered by State Water Resources Control Board. California runs its own regime: risk-level-based requirements, Rain Event Action Plans (REAPs) required 48 hours before forecast storms, and reporting through the SMARTS portal. Requirements vary by site risk level — this summary is not a substitute for the permit.
Inspector qualifications
Inspections must be performed by a certified Qualified SWPPP Practitioner (QSP); SWPPP preparation requires a Qualified SWPPP Developer (QSD).
Official sources
Common questions
What triggers a SWPPP inspection in California?
Under the Construction General Permit (Order 2022-0057-DWQ), a storm event of 0.25 inches or more triggers a post-storm inspection, generally due within 24 hours — including weekends and holidays. Routine inspections run every 7 days.
Who can perform SWPPP inspections in California?
Inspections must be performed by a certified Qualified SWPPP Practitioner (QSP); SWPPP preparation requires a Qualified SWPPP Developer (QSD).
Who administers the construction stormwater program in California?
State Water Resources Control Board (SWRCB) administers the NPDES construction stormwater program in California under the Construction General Permit (Order 2022-0057-DWQ).
What are the penalties for SWPPP violations in California?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and SWRCB can issue administrative orders and state penalties on top. Missing rain-triggered inspections is among the most commonly cited violations in stormwater audits.
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