To protect public health, the Board of Health requires that all new on-site sewage disposal systems are designed and installed in soil conditions and on lots in such a manner to provide a safe level of treatment of sewage containing potentially pathogenic organisms prior to entering groundwaters or restrictive layers.

To protect public health, the Board of Health requires that all new on-site sewage disposal systems must have three feet of vertical separation with gravity flow; or two feet of vertical separation with pressure distribution; or the system must meet the requirements of Department of Health alternative system guidelines. [Res. 08-10. Revised and reapproved by DOH 12/15/94. Res. 93-32, Eff. 11/09/93. Res. 90-43. Prior code § 8.1.1].