Onsite Wastewater Treatment Systems (OWT)

Registered OWT Systems Private Holding Tanks, Lagoons, Mound Systems, Septic Systems and Alternative Systems registered since 2004
Certified OWT Professionals Individuals certified to Inspect, Install, or Pump Onsite Wastewater Treatment Systems, or Evaluate Soil for siting OWT Systems
OWT Businesses Businesses employing at least one Certified OWT Professional