How to Size a Package Wastewater Treatment Plant for a New Texas Development

The most expensive mistake a Texas developer can make on private wastewater infrastructure is picking a plant size before doing the engineering that justifies it. A package WWTP that is undersized cannot accept the development’s actual flow without a permit amendment. One that is oversized costs more to build and more to operate than the project ever needed. Both outcomes were avoidable.
Municipal TPDES Individual Permits: What Texas Cities and Utility Providers Need to Know

Every Texas city and utility district that operates a wastewater treatment plant and discharges treated effluent to a creek, river, or other surface water is operating under a TPDES individual permit. That permit is not simply a piece of paper from TCEQ confirming the plant exists. It is the document that sets every operational parameter the plant must meet, every sample that must be taken, every report that must be filed, and every capital decision that has to happen before the permit allows the community to grow.