Texas Has a $174-Billion Water Problem. Treatment Infrastructure Is Where It Starts.

The Texas Commission on Environmental Quality has a straightforward definition of reclaimed water: domestic or municipal wastewater that has been treated to a quality suitable for beneficial use. Eleven words that don’t quite capture the urgency behind them.

Because in Texas, beneficial reuse is increasingly becoming a core water supply strategy.

The Math Behind the Mandate

The Texas Water Development Board released its Draft 2027 State Water Plan in April 2026, and the scale of the challenge it describes is difficult to overstate. From 2030 to 2080, Texas’ population is projected to grow by 53%, adding tens of millions of residents to a state already straining under drought conditions. Over that same period, existing water supply is expected to decline by roughly 10%, while annual water availability drops by 9%.

The demand side isn’t the crisis. Projected water demand increases only modestly, about 6% over the 50-year window. The crisis is the widening gap between what Texas has and what it needs, particularly during drought conditions. The draft plan projects severe water shortages during drought conditions if recommended strategies are not implemented, with millions of Texans potentially receiving less than half of projected water demand.

Closing that gap carries a price tag: approximately $174 billion in water infrastructure investment through 2080, more than double the cost projected in the previous plan. That figure accounts for inflation, construction cost increases, an extended planning horizon, and a significant backlog of near-term projects that were recommended in prior plans but not yet built.

To put it in context: that investment requirement equals roughly half the entire Texas state budget for the current biennium.

The 2027 plan is the state’s sixth regional water plan produced under the regional planning process, a product of 16 regional water planning groups, hundreds of volunteer stakeholders, and 25 years of this process. What it identifies clearly, for the first time at this scale, is that Texas cannot build its way out of this challenge with reservoirs and groundwater alone. The viable reservoir sites are dwindling, permitting has become increasingly constrained, and aquifer depletion in many regions is not recoverable on any human timescale.

For many Texas communities, water reuse is the only strategy on the table.

What TCEQ Actually Allows

Texas has one of the more permissive regulatory frameworks for reclaimed water in the country, governed primarily by Title 30, Texas Administrative Code, Chapter 210. Under these rules, reclaimed water is classified by the degree of likely public contact and the treatment standard required to achieve it.

Type I reclaimed water—treated to a quality suitable for direct public contact—can be applied to residential and public irrigation, parks, school yards, golf courses, and recreational impoundments where incidental contact is anticipated. It can also be used for toilet and urinal flushing, fire protection, and pasture irrigation for dairy herds.

Type II reclaimed water covers applications where human contact is unlikely: cooling tower makeup water, dust control, irrigation of food crops where the edible portion won’t be contacted, and maintenance of impoundments or natural water bodies.

Industrial reuse follows a parallel track, with Level I and Level II authorizations depending on whether off-site use is intended.

The regulatory framework was meaningfully updated earlier this year, when changes adopted in March 2026 created an alternate permitting pathway for onsite reuse under SB 1289, enabling a route that doesn’t require a full TLAP or TPDES permit. That’s a significant development for developers, commercial property owners, and smaller utilities exploring decentralized treatment and reuse.

Texas also has an established pathway for both indirect and direct potable reuse. Indirect potable reuse—discharging treated reclaimed water into a surface water or groundwater source that then receives further treatment before entering the drinking water supply—is already practiced in Texas. Direct potable reuse, which introduces advanced-treated reclaimed water directly into the potable water system or raw water supply, is reviewed by TCEQ on a case-by-case basis under 30 TAC § 290.39 and has its own regulatory guidance document published in 2022.

The legislature directed TCEQ to develop a regulatory guidance manual for direct potable reuse in 2021 via SB 905. The 89th legislative session, which ended June 2, 2026, passed SB 7 and HJR 7—legislation that establishes $1 billion per year in recurring, dedicated water funding from state sales tax proceeds. Water reuse was a central subject of advocacy during the session, with WateReuse Texas arguing that no single solution will close the gap and that regulatory gaps at TCEQ and TWDB must be addressed to fully leverage reuse as a supply strategy.

That advocacy is landing. Texas is moving toward a regulatory environment in which water reuse is not just permitted—it is actively incentivized, funded, and structurally integrated into the planning process.

The Treatment Imperative

Here’s where the engineering matters. Because reclaimed water isn’t all the same, and neither is the treatment that produces it.

Conventional wastewater treatment—activated sludge, secondary clarifiers, sand filtration—can achieve adequate effluent quality for many Type II reuse applications. But it struggles at the margins. Effluent from conventional systems often carries elevated turbidity, residual suspended solids, and nutrient concentrations that limit reuse options and complicate discharge permits. Conventional treatment systems can support many reuse applications, but achieving consistent reuse-grade effluent often requires additional polishing processes, larger footprints, and tighter operational control.

Membrane bioreactor technology changes that calculus. By integrating biological treatment with membrane filtration—ultrafiltration membranes that physically exclude particles, pathogens, and suspended solids at a pore size too small for conventional systems to match—MBR systems produce effluent that consistently meets or exceeds Type I reuse standards. Turbidity below 0.2 NTU. Fecal coliform below detection limits. BOD and TSS in the low single digits. 

The implications for Texas utilities are direct. 

An MBR-equipped facility isn’t simply treating wastewater to meet a discharge permit. It’s producing a resource, water clean enough to irrigate parks, recharge aquifers, supplement cooling systems, or, with appropriate downstream treatment, enter the potable supply. Every gallon of that effluent returned to beneficial use is a gallon that doesn’t have to be drawn from a declining aquifer or an over-allocated river system.

The Proof Point: Austin’s McKinney Roughs

The NXT|MBR™ platform—a fully integrated design-build system developed through the partnership of Integrated Water Services (IWS) and CROM—has already demonstrated this performance in one of the most water-stressed regions in Texas.

At McKinney Roughs Nature Park in Austin, IWS and CROM built an MBR-based wastewater treatment plant that tripled treatment capacity for Corix Utilities (now Nexus Water), completing the project ahead of schedule and under budget. The plant discharges permit-compliant effluent to the Lower Colorado River—the same river system that supplies millions of Central Texans—and is designed for modular expansion in 250,000-gallon increments as the surrounding community grows.

The five-zone treatment train at McKinney Roughs—equalization, anoxic, MBR, aerated, and CROM2 storage—produces effluent quality well within the thresholds that TCEQ requires for reuse authorization. The CROM2 tensioned shotcrete tank, engineered to ACI-350 standards, provides lifecycle durability, crack control, and liquid-tight performance advantages compared to many conventional concrete approaches.

That’s the NXT|MBR model in practice: not just a treatment system, but a reuse-ready water asset embedded in a community’s infrastructure, designed from day one for the regulatory environment Texas is building.

What This Means for Infrastructure Owners and Operators

Texas’ 2027 State Water Plan is a planning document, but it is also a directive. Municipalities, utilities, private infrastructure owners, and industrial operators across the state should read the supply gap projections not as a forecast about 2080 but as a description of decisions that need to be made now — because water infrastructure has a 30- to 50-year lifecycle, and the projects funded today will be operating in the world those projections describe.

Specifically, that means:

Municipal utilities in high-growth corridors—Central Texas, the Permian Basin fringe, the DFW exurbs—need to be asking whether their treatment infrastructure can produce effluent that supports reuse authorization, not just discharge compliance. The permitting environment is moving toward reuse. The funding environment, with $1 billion per year now directed toward water strategy, increasingly supports it. Treatment infrastructure that is not reuse-capable will become a liability.

Private utility operators and community developers serving master-planned communities, multifamily developments, and commercial campuses face the same question. Austin’s GoPurple program, which requires new commercial and multifamily developments above 250,000 square feet to meet water reuse standards, signals where major Texas markets are heading. Onsite MBR systems and connections to reclaimed water infrastructure are no longer niche solutions; they’re increasingly the baseline expectation.

Industrial operators in water-intensive sectors—food and beverage, power generation, oil and gas—face both risk and opportunity. The risk is regulatory and supply pressure on freshwater withdrawal. The opportunity is that reclaimed water authorizations under 30 TAC Chapter 210 are available for cooling towers, process water, and other industrial applications that don’t require potable-quality supply. MBR effluent quality routinely satisfies Level II industrial reuse standards, and often exceeds them.

The Integrated Delivery Advantage

One more thing the 2027 State Water Plan makes clear: Texas needs projects to move. The plan was developed on an accelerated schedule, partly to meet SWIFT funding commitment deadlines. The backlog of recommended-but-unbuilt projects from previous plan cycles is a significant problem; those projects exist on paper but not in the ground, meaning communities are planning around water supplies that haven’t been secured.

The single most common reason water infrastructure projects stall is coordination failure: engineers and contractors and equipment vendors and permitting consultants operating in silos, each optimizing for their own scope at the expense of the whole project. In a funding environment that rewards speed and accountability, that fragmentation is expensive.

The NXT|MBR platform is built on a different model. IWS provides engineering, design-build, permitting, and startup services as a single-point delivery system. CROM brings integrated tank and structural systems engineered to the same standard. The result is a project delivery approach that compresses timelines, eliminates coordination gaps, and produces a system that performs as specified from day one, without the contingency-laden uncertainty that conventional fragmented delivery produces.

Texas has a $174 billion problem and a 50-year clock. The communities and operators that move first, with treatment infrastructure designed for reuse readiness, will be in the best position as the supply gap continues to close.

The water that goes down the drain today doesn’t have to stay gone. With the right treatment system, it comes back.