Septic / OSSF
Septic Systems in Unincorporated Guadalupe County
Homes outside city sewer service in Guadalupe County use on-site sewage systems, which require permits and inspections.
An On-Site Sewage Facility (OSSF) is the official name for a septic system. Any new OSSF — or a repair to an existing one — needs a permit. In Guadalupe County, permits are handled locally under TCEQ rules.
Before buying rural land or an older home, ask whether the OSSF was permitted and when it was last serviced. A failed system can be expensive to replace. Start at TCEQ's OSSF page to understand the rules, then contact the county for local permit contacts.
Source to confirm: TCEQ – OSSF Information for Homeowners