{"state":"TX","state_name":"Texas","county":"williamson","county_name":"Williamson County","testing_required":true,"gas_testing_required":true,"gas_vehicle_min_age":2,"gas_vehicle_max_age":24,"diesel_testing_required":false,"test_fee_cents":1850,"exemptions":["gasoline vehicles less than 2 years old","gasoline vehicles more than 24 years old"],"stations":[],"station_details":[],"source_url":"https://www.dps.texas.gov/section/vehicle-inspection/vehicle-inspection-program-overview","source_updated_at":"2026-04-23 07:21:29","coverage_status":"partial","confidence_note":"Rule thresholds are source-backed, but current station coverage is delegated to an official live finder rather than a normalized station list.","stations_scope":"official_finder","stations_scope_label":"Official station finder","stations_note":"Texas DPS publishes a live inspection station locator for current Williamson County emissions-capable stations.","station_locator_url":"https://www.dps.texas.gov/apps/rsd/vi/VIactiveStationLocator/Default.aspx","help_cta":{"kind":"official_service","headline":"Open the official Williamson County testing workflow","body":"PlateHarbor mapped the main county testing rules and finder coverage. Use the official source or locator before you schedule a test or travel to a station.","label":"Open official station finder","href":"https://www.dps.texas.gov/apps/rsd/vi/VIactiveStationLocator/Default.aspx","placement":"after-official-links","disclosure":"Official station finder","tracking_key":"official-emissions-texas-williamson"}}