Septic vs. private sewer: Commissioners probe long-term liability in draft regulations

Commissioners spent substantial time on sewage disposal options for new subdivisions. Staff and several commissioners expressed concern about long-term liabilities if many lots use on-site septic systems that later fail; they discussed moving toward standards that require per-lot testing and engineered approvals where appropriate.

Health department representatives explained current permitting is site-specific: while a historical 15,000-sq-ft reference exists, modern approvals allow smaller lots when a soil scientist and engineer certify the system. Private sewer operators and commissioners noted that packaged or private treatment systems are regulated by the Public Service Commission (PSC) and typically require proof of funds for long-term maintenance before permits are issued.

Speakers emphasized the trade-offs: individual septic tanks can be cheaper up front but risk failing over time with diffuse liabilities; private treatment systems centralize maintenance but require an owner or HOA and create a single-point-of-failure if not properly funded and governed. The commission discussed requiring engineered proof of maintenance capacity as a condition of permitting for higher-density developments.