Bud Ervin WTP

Bud Ervin Water Treatment Plant

The Bud Ervin Water Treatment Plant in Mansfield demonstrates one of the premier uses of membrane treatment in North Texas. This 15-mgd expansion utilizes pressure membranes and GAC contactors.

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Ten Mile Creek Regional Wastewater System

APAI assisted TRA in implementing a new mechanical dewatering system complete with GBT-based WAS thickening and centrifugal dewatering.

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East Fork Raw Water Supply Project

Representing the largest project in Texas using reclaimed water to augment a surface water supply source, the East Fork Raw Water Supply project provides over 102,000 acre-feet of water per year, which is enough water to serve 500,000 people.

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DCRWS Wastewater Treatment Plant

APAI designed the original 0.68-mgd DCRWS wastewater treatment plant in the late 1980s, followed by three expansions to its current capacity of 11.5 mgd.

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TPDES Permit Support

APAI assisted the City of Conroe with the removal of a proposed reporting requirement for nitrate-nitrogen in the City's draft Texas Pollutant Discharge Elimination System (TPDES) permit.

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ALAN PLUMMER ASSOCIATES, INC. (APAI) has conducted business with quality and integrity for over 37 years. A regional firm founded in 1978 with a vision to uphold environmental stewardship and technical excellence, APAI is committed to serving our clients with distinction and integrity. Today, with nearly 90 employees and four Texas offices in Fort Worth, Dallas, Austin, and Houston, as well as locations in College Station, Texas, and Oklahoma City, Oklahoma; APAI continues that commitment.

Dedicated to water resources and environmental engineering, our firm balances sound engineering principles with innovative technology tailored to our clients’ needs. From initial project kick-off, through stringent QC review, to a completed project, our focus stays on developing cost-effective solutions for our clients.


What sets us apart from other companies is our concern, our clients, and our employees. “It’s the people here that make the difference,”says Alan Plummer, Chairman of Alan Plummer Associates, Inc. “We pride ourselves in hiring top-quality professionals that exhibit both technical and personal integrity. The success of our firm has always been a team effort.”

... because water is precious