OHState-AdministeredSWPPP Requirements in Ohio
Ohio administers NPDES construction stormwater coverage under permit OHC000006 through Ohio EPA. The 1-acre threshold applies statewide. Lake Erie watershed projects face additional scrutiny under the H2Ohio water quality initiative targeting phosphorus and harmful algal blooms. Urban MS4 areas in Columbus, Cleveland, Cincinnati, and Akron add local permit overlay requirements.
Ohio SWPPP Key Facts
- ✓Permit number OHC000006 — statewide NPDES construction general permit (2023 reissuance)
- ✓Lake Erie H2Ohio initiative imposes enhanced phosphorus controls in the watershed
- ✓eBusiness Center mandatory for NOI submission — no paper filings
- ✓$0 NOI fee
- ✓MS4 overlays in major metro areas require separate local compliance
Administering Agency
- Agency
- Ohio Environmental Protection Agency (Ohio EPA)
- Phone
- 614-644-2001
- Website
- Ohio EPA Stormwater Program
Permit Details
- Permit Name
- Ohio Construction General Permit
- Permit Number
- OHC000006
- Effective Date
- 2023-04-23
- Expiration Date
- 2028-04-22
- Permit Document
- View Current Permit
SWPPP Thresholds & Triggers
- Acreage Threshold
- 1 acre of land disturbance
Lake Erie watershed projects may require enhanced nutrient controls under Ohio's Lake Erie H2Ohio initiative. MS4 co-permittees in urban areas impose additional local requirements.
Inspection Requirements
- Inspection Frequency
- At least once every 7 days and within 24 hours of a 0.5-inch or greater storm event
- Rain Event Threshold
- 0.5 inches in 24 hours
- Certified Inspector
- Required by state
- Accepted Certifications
- CPESC, CESSWI, Ohio EPA-recognized Stormwater Inspector
Ohio EPA eBusiness Center used for NOI filing; paper NOI no longer accepted.
Penalties & Enforcement
- Max Civil Penalty (Per Day)
- $10,000 per day per violation (up to $25,000/day for serious violations)
- Criminal Penalties
- Felony charges possible for knowing violations with significant environmental harm
Ohio EPA District Offices conduct inspections; H2Ohio sites face elevated scrutiny.
Permit Fees
- NOI Filing Fee
- $0
- Other Fees
- MS4 local stormwater fees may apply in Cuyahoga, Franklin, Hamilton, and Summit Counties
How Ohio Differs from Federal Requirements
- ⚠Ohio administers its own NPDES permit (OHC000006) rather than EPA's federal CGP.
- ⚠H2Ohio phosphorus standards are an Ohio-specific requirement with no direct federal CGP equivalent.
- ⚠eBusiness Center electronic filing is mandatory; federal CGP allows paper filing in some cases.
SWPPP Tips for Ohio
- ➤File your NOI through Ohio EPA's eBusiness Center — paper NOIs are rejected.
- ➤In the Lake Erie watershed, document phosphorus management practices explicitly in the SWPPP.
- ➤Contact the local MS4 (city stormwater utility) before breaking ground in Columbus, Cleveland, or Cincinnati metro areas.
Ohio SWPPP FAQs
What is H2Ohio and how does it affect construction SWPPP requirements?+
H2Ohio is Ohio's water quality initiative targeting phosphorus reduction in Lake Erie. Construction sites in the Lake Erie watershed must include enhanced phosphorus controls and may face additional Ohio EPA scrutiny.
Does Ohio require a permit for projects under 1 acre?+
No state NPDES permit is required under 1 acre unless the site is part of a larger common plan of development that totals 1+ acre.
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