Resources / Approvals
State and local approval status.
This page lists where state and county authorities stand on the Subfield retrofit enhanced treatment system. A status appears here only once it is established and can be checked against a public source.
No approval records are published yet.
Certifications and state or local approvals will be published only when they are established.
Each record will show one status for one product with one authority, the date it was last checked against that authority and where to check it yourself.
Decisions about your system.
Obtain applicable design and permit approval before physical changes.
Rely on qualified professionals and your local authority for decisions about your system.
Common questions.
Related pages.
- For regulators and county officials
What Subfield is developing, its pre-release status, planned records access and what is not yet published.
- Document library
This library lists released spec sheets, manuals, drawings and certificates for Subfield products, with each file’s type and the products it covers.
- Installation planning stages
This is a planning guide, not field installation instructions.
Ask about review and records.
An inquiry is not an order, a reservation or an installation approval.