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Compliance Guide

NPDES MS4 stormwater compliance in Florida

Florida MS4 permits and industrial NPDES coverage require documented inspections, cleanouts, and outfall screening. We deliver the field work — catch basin vacuuming, hydro-jetting, CCTV, and dry-weather outfall checks — plus the SWPPP-ready photo and manifest package your inspector wants to see.

What MS4 permits typically require

  • Annual (minimum) inspection of every catch basin and outfall in the system
  • Sediment depth measurement and cleaning trigger thresholds documented
  • Dry-weather outfall screening for illicit discharges
  • SWPPP (Stormwater Pollution Prevention Plan) kept current and available on request
  • Records of every cleanout, including disposal manifests
  • Public education and Good Housekeeping BMPs for municipal facilities

Industrial MSGP obligations

Industrial sites (SIC-coded facilities discharging stormwater) carry heavier obligations: quarterly visual inspections, benchmark monitoring for TSS and other parameters, and immediate response to any exceedance. We handle the field maintenance side and coordinate with your environmental consultant on sampling.

Construction General Permit (CGP)

Projects disturbing over one acre need a Notice of Intent under Florida's CGP and inspection every 7 days plus after any 0.5"+ storm event. We provide post-storm sweep cleanouts and can pick up in-service compliance once your project transitions to permanent BMPs.

FAQ

Frequently asked questions

Who needs to comply with NPDES / MS4 in Florida?
Any operator of a Municipal Separate Storm Sewer System (MS4) — cities, counties, universities, DOT facilities — plus industrial sites covered under a Multi-Sector General Permit (MSGP) and construction sites over one acre (CGP). Private commercial properties that discharge to an MS4 also carry pass-through obligations.
What documentation do I need on file?
Your Stormwater Pollution Prevention Plan (SWPPP), quarterly / annual visual inspections, dry-weather outfall screening records, sediment removal manifests, and any illicit-discharge investigation records. Missing records — not actual pollution — is the most common finding at inspection.
How often should catch basins and outfalls be inspected under MS4?
MS4 permits typically require annual inspection at minimum, with cleaning as needed based on sediment depth. Industrial MSGP sites often require quarterly visuals plus benchmark monitoring.
What triggers an enforcement action?
Visible sheen on an outfall, sediment leaving the site, missing SWPPP records at inspection, or a public complaint. Fines under 40 CFR 122 can reach $37,500+ per day per violation.
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