Port Arthur advances $92 million wastewater plant overhaul to replace aging infrastructure

The City of Port Arthur is undertaking a major rehabilitation of its Main Wastewater Treatment Plant, replacing treatment components that have reached the end of their service life. The project, funded through state revolving funds, ARPA, and city capital, aims to extend plant reliability and maintain regulatory compliance.

The City of Port Arthur is executing a comprehensive rehabilitation of its Main Wastewater Treatment Plant, a facility rated at 9.2 million gallons per day that serves a substantial portion of the city. According to official disclosures, the project, which began construction in June 2022 and is scheduled for completion in October 2027 addresses components that have reached the end of their operational life after several decades of service. The work encompasses replacement of major treatment processes, rehabilitation of existing treatment units, and upgrades to mechanical, electrical, instrumentation, and control systems.

The project is partially funded through the Clean Water State Revolving Fund (CWSRF) administered by the Texas Water Development Board (TWDB), with additional funding from the city’s capital improvement budget and American Rescue Plan Act (ARPA) allocations.

This development matters as it reflects sustained investment in aging U.S. water infrastructure, a sector facing deferred maintenance and tightening regulatory requirements. The rehabilitation is designed to maintain continuous plant operations during construction while improving reliability, reducing the risk of untreated discharges, and ensuring continued compliance with state and federal discharge permits.

For municipal utilities and infrastructure stakeholders, the project illustrates the funding structures available for large-scale wastewater upgrades, combining federal revolving funds, pandemic relief allocations, and local capital. The outcome will have implications for service reliability across Port Arthur’s residential and commercial base, as well as water quality in receiving streams and coastal waters. The project also serves as a case study for similar mid-sized municipal treatment facilities approaching end-of-life cycles.

The City of Port Arthur is a municipal government in Texas operating water and wastewater utilities serving the local community. The Texas Water Development Board is the state agency administering water financing programs, including the Clean Water State Revolving Fund.