Where we work

Texas Water and Wastewater Engineering

Water and wastewater engineering in Texas from a McKinney-based firm: utility design, site civil, construction administration and TCEQ permitting.

What we do in Texas

What MES does in Texas

Modern Engineering Solutions (MES) is a civil engineering firm headquartered in McKinney, Texas. We provide water and wastewater engineering, site civil engineering for land development, and construction administration across the state.

We work for developers and builders, utilities and municipalities, chains and franchises, contractors and design-builders, and landowners. We also take on overflow design work for other engineering firms.

Most Texas sites raise the same early question: where will the water come from, and where will the wastewater go? We answer it before the site plan is set, because the answer can change the plan.

How permitting and review work in Texas

The Texas Commission on Environmental Quality (TCEQ) regulates wastewater. A site that cannot reach a public sewer has a few paths: a septic (OSSF) permit for small flows, a TPDES discharge permit, a Texas Land Application Permit (TLAP), or reuse under TCEQ's Chapter 210 reclaimed water rules.

The Public Utility Commission of Texas (PUC) regulates the certificates of convenience and necessity (CCNs) that set water and sewer service areas. The provider that holds the CCN for your land is usually the one that serves it.

Cities review plats, site plans and utility plans inside their limits, and often plats in their extraterritorial jurisdiction (ETJ). In unincorporated areas, a local authorized agent, often the county, or TCEQ itself issues septic permits. TxDOT reviews driveways on state highways. Sites that disturb one acre or more need coverage under TCEQ's Construction General Permit, TXR150000.

Work across Texas

Our Texas work runs from single commercial pads to reuse systems for whole developments. In Williamson County, we secured a TCEQ reuse authorization for an industrial site in Taylor after the county denied septic. We also handled rezoning, platting and site design for a mini-warehouse site in Georgetown.

In North Texas, we designed a car wash site in Fate and a lift station for an RV park in Milford. In West Texas, we provided construction-phase engineering for a four-mile waterline relocation along IH-20 in Sweetwater. More Texas projects are listed below.

Common questions

Do I need a TCEQ wastewater permit for my site?

Not if the site can connect to an existing public sewer. The utility that owns the line sets the terms. If it cannot connect, you need a septic permit for small flows, or a TCEQ permit or authorization for a treatment system.

What is a 210E authorization?

It is a TCEQ authorization under Subchapter E of the Chapter 210 rules, which covers industrial reclaimed water. Treated wastewater is reused instead of being discharged to a creek. See 210E authorizations.

Does MES work outside the big metros?

Yes. Many of our Texas projects are in small towns and on county land, from the Panhandle to the Rio Grande Valley. Call (214) 833-6748.

Talk to an engineer

Tell us about your project.

  1. An engineer reads it

    Not a salesperson. Someone who can tell you whether the pathway is real.

  2. You get a first answer

    Your options, the agencies involved and the questions that decide cost and schedule.

  3. You decide

    No commitment to have the first call.

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Site location, what you are trying to build, and your deadline.

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