Colorado SWPPP inspection requirements
- Rain trigger
- 0.25″ storm event
- Post-rain deadline
- Within 24 hours
- Routine inspections
- Every 7 or 14 days
- Permit
- COR400000 Construction Stormwater General Permit
- Agency
- Colorado Department of Public Health and Environment (CDPHE)
Verify against your permit. These values reflect the most common reading of Colorado's program; permits change and projects vary. The official permit text from CDPHE controls.
How Colorado handles construction stormwater
Construction sites in Colorado disturbing one acre or more need coverage under the COR400000 Construction Stormwater General Permit, administered by Colorado Department of Public Health and Environment. Colorado's default is every 14 days; high-priority sites and post-storm events require more frequent inspection.
Inspector qualifications
A qualified person designated by the operator. Check the current state permit for certification requirements.
Official sources
Common questions
What triggers a SWPPP inspection in Colorado?
Under the COR400000 Construction Stormwater General Permit, a storm event of 0.25 inches or more triggers a post-storm inspection, generally due within 24 hours (non-work days typically extend to the next work day; check your permit). Routine inspections run every 7 or 14 days.
Who can perform SWPPP inspections in Colorado?
A qualified person designated by the operator. Check the current state permit for certification requirements.
Who administers the construction stormwater program in Colorado?
Colorado Department of Public Health and Environment (CDPHE) administers the NPDES construction stormwater program in Colorado under the COR400000 Construction Stormwater General Permit.
What are the penalties for SWPPP violations in Colorado?
Federal Clean Water Act civil penalties can reach $68,445 per day per violation, and CDPHE 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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