Beginning July 1, all concrete septic tanks installed in New Mexico are required to have a cast-in resilient connector certified to meet or exceed ASTM Standard C923 on the outlet connection. Only licensed installers or qualified homeowners may install or modify onsite systems. Qualified homeowners, however, may install only conventional systems, and only at their primary residence. Installers are designated Specialist 1 for graywater and conventional onsite systems, and Specialist 2 for all types of onsite systems.Only installers, site evaluator/system designer, or professional engineers with a specialty sub-discipline of onsite wastewater engineering may inspect onsite systems for property transactions. Manufacturers
