The Onsite Wastewater Program

The Onsite Wastewater Program's mission is to prevent untreated or improperly treated sewage from being discharged into the environment and thus to protect the health of the citizens of Louisiana. The program licenses and regulates onsite wastewater treatment system installers, haulers, sub-manufacturers, and manufacturers of wastewater systems in this state. Sanitarians located in the health units of each parish serve to inform, advise, and operate a permitting system with regard to onsite sewage treatment. Select the Parish Health Units link from the left menu bar to search for contact information for the local health units.

Small Flows Clearinghouse - Funded by the U.S. Environmental Protection Agency, the NSFC helps America's small communities and homeowners solve their wastewater problems to protect public health and the environment.

Private Water Well Initiative Website - Request Private Water Well Samples and/or lending institution letters online.

Highlighted Facts

  • A total of 288,724 onsite wastewater treatment systems have been permitted as of September 2020.
  • In 2020, 772 installer and maintenance licenses have been issued to qualified individuals.
  • To date, 57 of the 64 parishes in Louisiana have enacted onsite sewage ordinances.
  • Approximately 54,750,000,000 gallons of wastewater per year is treated by onsite wastewater treatment systems in the state of Louisiana.



Contact Information