Environmental health staff conduct site reviews and plan reviews for all On-site Wastewater Treatment Systems (OWTSs) with a design flow of less than 3,000 gallons per day installed in Newton County.  Site reviews and inspections include newly installed and/or repaired wastewater treatment systems and lagoons for single-family homes. Lagoons for two or more single-family sites and commercial facilities are regulated by the Missouri Department of Natural Resources (MDNR).