Air emissions and wastewater discharge are regulated primarily at the state and federal level through agencies such as Texas Commission on Environmental Quality (TCEQ) and the Environmental Protection Agency (EPA).
Air
TCEQ oversees air quality requirements for data centers in Texas, and reviews air permit applications, regulates emissions standards, and enforces state air quality regulations. The City of Fort Worth responds to air quality complaints. City staff are trained to conduct air quality compliance inspections, to document site conditions, and to refer violations to TCEQ.
TCEQ Permitting
The TCEQ has permits for many different air quality emissions sources. For data centers, the most common sources of air quality emissions are cooling towers, refrigeration systems, and emergency generators. It is important to note that a data center’s permit requirements are site-specific based on a facility’s equipment and site design. Permits can vary among:
• Permit by Rule (cooling towers, refrigerant systems, emergency generators/turbines, fuel storage tanks)
• Standard Permit (power engines & turbines)
• New Source Review (NSR) Permit (sources that don’t meet the criteria for the permitting above)
• Title V Permit (major sources; based on emissions)
Cooling Towers
Cooling towers may be used by data centers to cool down the facility’s equipment. This is achieved by bringing warm water into contact with cooler air in either a closed loop or open air system. In open air systems, a small amount of water is evaporated to cool the rest of the liquid.
• TCEQ: Permit by Rule 30 TAC 106.371
Refrigeration Systems
A refrigeration system keeps servers from overheating by removing excess heat using cooling equipment.
• TCEQ: Permit by Rule 30 TAC 106.373
Wastewater
The City of Fort Worth’s Water Utility requires wastewater studies to determine impacts, needed improvements, and permit requirements. The permitting process provides:
- protection of the sewer collection system,
- protection of wastewater treatment operations,
- protection of utility workers and public health,
- prevention of unauthorized chemical discharges,
- enforceable accountability measures,
- ongoing monitoring and oversight,
- and verification/certification requirements that can be investigated and validated by City staff.
Under the 2026 Installation Policy and Design Criteria for Water, Wastewater and Reclaimed Water Infrastructure(PDF, 21MB) , the City requires data centers obtain wastewater pretreatment permits as Non-Significant Industrial User (NSIU). The City issues the NSIU pretreatment permit, in accordance with TCEQ rules and the City’s local ordinance. Doing so allows the City to require and enforce:
- chemical disclosure and Safety Data Sheets (SDS) submission,
- spill prevention and slug control plans,
- secondary containment,
- monitoring and inspection access,
- discharge limitations,
- annual certifications,
- employee/operator training,
- reporting requirements,
- and emergency notification procedures.