Rule 15-18-77-5.9.5 - Treatment1. Wastewater disposed of by Overland Discharge must meet the requirement established by American National Standards Institute/National Sanitation Foundation (ANSI/NSF) International Standard Number 40 testing protocol, as set forth in Regulation Governing Residential Individual Onsite Wastewater Disposal Systems: Certification.2. Treated effluent must be adequately disinfected as outlined in Appendix 11 (Design Standard for Disinfection).15 Miss. Code. R. 18-77-5.9.5