Clean water: On-site wastewater treatment systems

On-site wastewater treatment systems (OWTS), also known as septic systems, are governed by Regulation 43.
How does this affect you?
  • For on-site wastewater treatment systems with flows 2,000 gallons per day or less, permitting is conducted by local counties.
  • We must provide initial review and acceptance of products and technology.
  • On-site wastewater treatment systems with flows greater than 2,000 gallons per day must follow the design review facility approval process.
Local agency OWTS program information.
Regulation 43: product acceptance lists
Product review submittal forms
Forms for local public health agencies
Regulation 43 policies and clarifications
Additional documents

Related OWTS links