Dallas, Texas Water Outage Today

Dallas tap water system, by the numbers

The system behind most taps in Dallas is Dallas Water Utility, which EPA records list as serving roughly 1,356,479 people. Customers know it as Dallas Water Utilities; the name on your bill is the one to call.

Where Dallas's tap water comes from

Tap water in Dallas starts as surface water. Dallas Water Utility takes it from 5 - Lake Fork, 1 - Iron Bridge (Lake Tawakoni), and 2 - Ray Hubbard and runs it through treatment before it reaches the mains. After treatment the water is held in 22 storage tanks and reservoirs and pushed uphill by 124 pump facilities; that storage is the buffer that keeps taps running for a few hours after a pump or main fails.

The outage angle. A surface-water system depends on its plant staying online. If the plant, the raw-water pumps or the power feeding them fails, pressure can fall across the entire service area at once, and a precautionary boil notice tends to cover whole zones rather than the single street of a main break.

Main breaks and shutoffs in Dallas: the usual causes

These are the causes that match the record for Dallas, listed roughly in order of how much they matter here.

• Flooding and heavy rain. NOAA logged 180 flood, flash flood and heavy rain reports in Dallas County from 2015 through 2026, and 8 days a year bring an inch of rain or more. Flooding is hard on water systems in three ways: it erodes soil around pipe crossings, drowns pumps and electrical equipment, and can let contaminated runoff into the mains, which triggers precautionary boil notices.
• Freezing weather. Dallas sees about 32 days a year with a low at or below 32°F, and 2 days at or below 20°F. The coldest morning in the 2015 through 2025 record came on February 16, 2021. The longest stretch with highs that never rose above freezing ran 6 days, ending February 18, 2021. Frozen service lines and meters cause single-address outages, while ground frost and thaw cycles crack older mains and produce the street-wide breaks.
• Summer demand. Dallas has about 62 days a year at or above 95°F and 30 at or above 100°F, and the hottest day in the record came on August 18, 2023. Lawn irrigation and cooling push demand to its yearly high, so pumps run hard, tanks drain faster than they refill and pressure sags on high ground in the evening.
• Storm-driven power loss. Thunderstorm wind, hail and tornado reports in Dallas County number 410 since 2015. Pump stations and treatment plants that depend on Oncor run on the electric grid, so a storm that downs power lines can lower water pressure even when no pipe is damaged.
• Construction and third-party damage. A backhoe or boring crew that hits a main is among the most common reasons a single block goes dry without warning. Utilities handle those the same way as any break: isolate, repair, flush.
• Scheduled work, or a fault inside your own home. Utilities warn customers before a planned shutoff. If nothing was announced and the neighbors are fine, the cause is probably your shutoff valve, meter or pressure regulator.

Freeze, heat and rain: the Dallas weather record

Main break season in Dallas runs from late fall into early spring, with the coldest stretch around December through February.

Because this is gridded reanalysis data, individual hot and cold days can read a few degrees off what the airport recorded. The day counts and yearly patterns are the useful part.

Is Dallas water safe? Boil notices and EPA record

Since 2015, EPA's record for Dallas Water Utility shows no health-based violations.

A boil water notice in Dallas is a separate thing from a violation. Dallas Water Utilities issues one when pressure falls low enough for contamination to enter the pipes, after a main break is repaired, or when a routine test comes back positive. The Texas Commission on Environmental Quality (TCEQ) oversees the process, and the notice stays until clean samples come back, usually a day or two after pressure returns.

Lead service lines and old plumbing in Dallas

The most recent 90th-percentile lead result filed for Dallas Water Utility is 1.1 ppb (2024). The federal action level is 15 ppb, so that result is comfortably below it.

33.5% of occupied homes in Dallas were built before 1970, and lead service lines and solder stayed legal until the federal ban in 1986. After any outage that disturbs the pipes, run the cold tap 30 seconds to 2 minutes before drinking, and ask Dallas Water Utilities about its lead service line inventory.

How long a water outage lasts in Dallas

Most repairs of an ordinary main break in Dallas take half a day once the crew is on site. Bigger mains, deep bury and busy roads stretch that to a day or more. With 1,356,479 people on the system, a break on a main that feeds a whole district can leave thousands of homes dry at once, and crews may close valves several blocks away to isolate it.

Ask Dallas Water Utilities for a restoration estimate when you report the outage; for large breaks it is normally posted and updated as the repair progresses.

Preparing for a long water outage in Dallas

With about 2.4 people in the typical Dallas home, FEMA's one-gallon-per-person-per-day rule means 7 gallons covers three days and 34 gallons covers two weeks.

• Heat: 62 days a year top 95°F here, so plan for more than the one-gallon minimum, and keep extra for pets.
• 27.8% of homes are in buildings with 20 or more units. Upper floors lose pressure first, and rooftop tanks and booster pumps depend on building power.
• 57.6% of households rent. Tell your landlord or property manager about a leak or outage right away, since the shutoff valve may be theirs.
• Do not forget the water heater: the tank holds roughly 30 to 50 gallons you can drink after it is switched off and allowed to cool.
• Fill the bathtub and a few large pots as soon as you hear a break is likely; that water is for flushing and washing, not drinking.

How Dallas compares with nearby water systems

Water outage pages for nearby cities

Irving, TX · Grand Prairie, TX · Garland, TX · Plano, TX