Environmental

Texas's 'voluntary on-site wastewater treatment' systems (septic systems) are regulated primarily by:

ATCEQ through statewide rules and county health departments for local permitting✓ Correct
BTREC for all residential properties
CFederal EPA exclusively
DLocal city utilities departments

Explanation

On-site sewage facilities (OSSFs) in Texas, commonly known as septic systems, are regulated by TCEQ under the Water Code and through local county health departments that administer the OSSF program. Each system must be designed, installed, and maintained per TCEQ standards. Real estate agents should be aware that septic system condition is a material disclosure item.

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