An OWTS permit is required for new installations, expansions, and repairs (with some exceptions). To obtain a permit, the following will be required for new systems/new soil treatment areas (STA’s): completed permit application, payment of permit fee, system design, soils information, test pit logs, percolation tests (if used), and a site plan. Tri-County Health Department (TCHD) will accept the applications at our Environmental Health Offices. TCHD staff will then review the information and make a site visit. If the application, design (if applicable) and site meet our requirements, TCHD will issue a permit to construct, expand or repair the OWTS.