The Dallas–Fort Worth metroplex is the fourth-largest metro area in the United States — roughly 8 million people spread across 13 counties. Supplying water to a population that large in a semi-arid climate with unpredictable rainfall is an enormous engineering and planning challenge.
Multiple water utilities serve the DFW area. Dallas Water Utilities, Fort Worth Water, the Tarrant Regional Water District, and the North Texas Municipal Water District are the major players, each drawing from different reservoir systems.
Where DFW’s Water Comes From
Unlike cities that rely on a single river or aquifer, DFW pulls from a network of reservoirs:
- Dallas draws primarily from Lake Ray Hubbard, Lake Grapevine, Lake Lewisville, and Lake Ray Roberts — all reservoirs on tributaries of the Trinity River system.
- Fort Worth is supplied by the Tarrant Regional Water District, which manages water from Lakes Bridgeport, Eagle Mountain, Worth, Benbrook, Cedar Creek, and Richland-Chambers.
- Suburban communities are served by a patchwork of regional and municipal systems, each with its own source water.
This diversification provides some resilience, but all of these sources are surface water reservoirs dependent on rainfall in north-central Texas — a region prone to severe drought.
PFAS: Military Installations and Industrial Sources
DFW has significant PFAS contamination sources:
Naval Air Station Fort Worth Joint Reserve Base (NAS JRB) — Located in west Fort Worth, this active military installation has used AFFF firefighting foam extensively. PFAS contamination has been confirmed in groundwater on and near the base, with contamination plumes extending into surrounding neighborhoods. The Department of Defense has been conducting investigation under CERCLA.
Former Hensley Field (Dallas Naval Air Station) — Now the site of Dallas Executive Airport, this former military installation has documented PFAS contamination from historical AFFF use.
DFW International Airport — One of the busiest airports in the world, DFW Airport has used AFFF for decades. PFAS sampling in and around the airport has detected contamination, though the primary drinking water impact depends on groundwater pathway connections to local wells.
Industrial sources — The DFW metroplex has extensive manufacturing, aerospace, and petrochemical operations that have used or released PFAS compounds.
Most DFW residents are on treated surface water, which limits direct PFAS exposure through tap water. But communities near contamination sources that rely on groundwater — or that have wells drawing from contaminated aquifers — face higher risk.
Drought: The Recurring Threat
Texas drought is not a possibility — it’s a certainty that recurs with varying severity. The DFW area’s water supply has been tested repeatedly:
- 2011 — The worst single-year drought in Texas history dropped reservoir levels to dangerous lows. Mandatory restrictions were imposed across the metroplex.
- 2022 — Severe drought conditions again stressed reservoir levels and triggered mandatory conservation measures in multiple DFW cities.
- Long-term projections — The Texas Water Development Board projects that demand will exceed current supply capacity in the DFW region within the next 20-30 years without new supply development.
New reservoir projects have been proposed — including Marvin Nichols Reservoir in northeast Texas — but face environmental opposition and funding challenges. Meanwhile, population growth continues at a pace that outstrips new supply development.
Water Quality Concerns
DFW’s surface water reservoirs present specific quality challenges:
- Taste and odor — Blue-green algae in reservoirs produce geosmin and MIB compounds that cause earthy or musty taste and odor, particularly in late summer. Utilities use powdered activated carbon and other treatments to manage this, but periodic taste complaints are common.
- Disinfection byproducts — Texas heat accelerates DBP formation. Dallas Water Utilities has shifted from free chlorine to chloramine disinfection to better control THM and HAA levels, but some areas of the distribution system still approach MCL limits during summer.
- Total dissolved solids (TDS) — Some DFW source water has elevated TDS from natural mineral content and agricultural runoff, affecting taste and hardness.
- Nitrates — Agricultural and urban runoff introduce nitrates into reservoir tributaries. Levels are managed through treatment but require monitoring.
Lead in DFW
DFW doesn’t have the same concentration of pre-war lead infrastructure as Rust Belt cities, but lead is still present:
- Lead solder in homes built before 1986 can leach lead into drinking water
- Brass fixtures containing lead alloys are common in older homes
- Some older neighborhoods in Dallas and Fort Worth have lead service connections, though the total number is far lower than cities like Cleveland or Chicago
Both Dallas and Fort Worth Water utilities are conducting lead service line inventories under EPA’s LCRI mandate and providing information to customers about their service line status.
Private Wells in the DFW Area
Rural and exurban communities surrounding the DFW metroplex often rely on private wells or small community water systems tapping the Trinity Aquifer, Woodbine Aquifer, or other local formations.
Key risks:
- Nitrates from agricultural operations and concentrated animal feeding operations (CAFOs) in rural North Texas
- Naturally occurring arsenic and fluoride in some aquifer formations
- PFAS — especially for wells near military installations or industrial sites
- Bacteria — particularly after heavy rain events in areas with high septic system density
Private well testing is the owner’s responsibility in Texas. TCEQ provides guidance but doesn’t require testing.
What DFW Residents Should Know
- Know your utility. DFW is served by dozens of water providers. Find out who serves your address and read their annual Consumer Confidence Report.
- Taste issues aren’t safety issues (usually). The earthy/musty taste that sometimes appears in DFW water is typically caused by algae compounds that are unpleasant but not harmful. A carbon filter handles it.
- Consider a carbon filter if you’re concerned about DBPs, chloramine taste, or trace contaminants.
- Conserve water. DFW’s supply is finite and drought-variable. Water-efficient landscaping, smart irrigation, and indoor conservation all matter.
- Private well owners — Test at least annually for bacteria and nitrates. If you’re near NAS JRB or DFW Airport, test for PFAS.
- Check for lead if your home was built before 1986 — ask your utility about your service line and check your home plumbing.
The Bottom Line
DFW’s water challenge is fundamentally about growth versus supply. Eight million people — heading toward 10+ million — in a climate that delivers feast-or-famine rainfall is a planning problem that requires massive infrastructure investment and serious conservation commitment.
The water quality at the tap generally meets federal standards, but the pressures of heat, drought, algae, PFAS contamination from military sources, and rapid expansion create an increasingly complex management challenge.
If you’re concerned about your water quality, a certified water treatment professional can test your water and recommend the right treatment for your home.