Permit pages
MS4 software, framed for the permit your state agency issues.
Preliminary state-reference pages use the same general six-MCM product framework. They are planning aids, not verified interpretations of a current permit and not promises of state-specific forms or reporting templates. NPDES permitting authority varies between EPA and authorized state agencies. Confirm the current permit and issuing authority before implementation.
Choose your state
Choose your state to see the closest MS4 permit workflow page.
Pages below are preliminary references for each state's Phase II program. They are not verified production coverage and do not mean a state-specific annual-report template is available. Selecting a state simply navigates to the page; we do not detect your location.
Preliminary state references
Phase II MS4 programs by state.
These noindex pages are early framing references only. State-specific permit language, forms, annual-report templates, and production readiness must be independently verified before a customer workspace is represented as covered.
- Pacific NorthwestPreliminary reference
Oregon Phase II
Phase II MS4 General Permit
Issuing agency: Oregon Department of Environmental Quality
Aligned to the six MCMs that DEQ uses for Oregon's Phase II MS4 General Permit. Framework fits cleanly. Honest about where the deepest reference work is today.
Open page - Pacific NorthwestPreliminary reference
Idaho Phase II
IPDES Phase II MS4 General Permit
Issuing agency: Idaho Department of Environmental Quality
Aligned to the federal six-MCM framework that Idaho DEQ uses through the IPDES program. Same product, framed for Idaho permittees.
Open page - Mountain WestPreliminary reference
Colorado Phase II
Phase II MS4 General Permit
Issuing agency: Colorado Department of Public Health and Environment
Aligned to the six-MCM framework CDPHE uses for the state-level general permit. Built for Front Range cities and counties operating under Colorado Phase II.
Open page - Gulf Coast and Inland TexasPreliminary reference
Texas Phase II
Texas Small MS4 General Permit (Phase II)
Issuing agency: Texas Commission on Environmental Quality
Preliminary planning reference for how the general six-MCM workspace may map to Texas Phase II programs. Not verified production coverage.
Open page - SoutheastPreliminary reference
North Carolina Phase II
Phase II MS4 General Permit (NCG020000 series)
Issuing agency: NC Department of Environmental Quality, Division of Energy, Mineral, and Land Resources
Aligned to the six-MCM framework NCDEQ administers for Phase II permittees. Framed for North Carolina small MS4 programs.
Open page - SoutheastPreliminary reference
Florida Phase II
Phase II MS4 General Permit
Issuing agency: Florida Department of Environmental Protection
Aligned to the six-MCM framework FDEP uses for Phase II permittees. Framed for Florida small MS4 programs.
Open page - MidwestPreliminary reference
Ohio Phase II
Phase II Small MS4 General Permit (OHQ000003 series)
Issuing agency: Ohio EPA, Division of Surface Water
Aligned to the six-MCM framework Ohio EPA uses for Phase II permittees. Framed for Ohio small MS4 programs.
Open page - Mid-AtlanticPreliminary reference
Pennsylvania Phase II
PAG-13 Phase II MS4 General Permit
Issuing agency: Pennsylvania Department of Environmental Protection
Aligned to the PAG-13 framework PA DEP administers for Phase II permittees. Framed for Pennsylvania small MS4 programs operating under the state-level general permit.
Open page
How the coverage grows
One product, framed for each state's permit.
Phase II MS4 programs across the country share a federal framework: the same six Minimum Control Measures, the same general structure of inspections, IDDE response, BMP tracking, and annual reporting. State-level differences are real but operate on top of that shared framework. The general workspace is the starting point; state-specific terminology, dropdowns, forms, and reporting templates require independent verification before any customer configuration or coverage claim.
These state pages remain preliminary and excluded from search indexing until the relevant permit language and product coverage are independently verified. If your state is not listed, or if you need state-specific reporting, reach out so the required framework and verification work can be scoped before any coverage claim is made.
Don't see your state?
Discuss a Phase II program outside the states listed above.
The product framework is organized around the six federal MCMs used by Phase II MS4 programs. State and permit-specific requirements still need review. Contact us to determine whether the current product scope fits and what verification or configuration would be required.
Related resources
Useful reading regardless of your state.
- GuideUnderstanding MS4 compliance: a plain-language overview
- BlogHow to make an MS4 program audit-ready (without rewriting your spreadsheets)
- BlogHandling illicit discharges from complaint to closure: a working playbook for MS4 coordinators
- PlatformThe full platform: workflows, modules, roles, and how the pieces fit together