Rockwall County septic services.

Rockwall County issues the septic permit for the unincorporated county plus the city of Rockwall. It holds that job only because the commissioners court adopted an on-site sewage facility order and TCEQ approved it (Health and Safety Code § 366.031), and § 366.032(b) makes that order prevail wherever it is stricter than 30 TAC Chapter 285. Ask the office for its current order — Texas counties have no general zoning power, so the order, not zoning, is where a local siting rule sits.

The dominant constraint here is clayey subsoil that water moves through too slowly (84.0% of rated soils), followed by flooding (7.3%). NRCS rates 85.2% of rated ground very limited for a standard soil absorption field, 8.3% for subsurface drip and 8.3% for surface application with disinfection. Where a conventional field will not pass, subsurface drip is usually the route that does.