Dallas water quality, from the utility’s own numbers.
Is Dallas water hard?
Yes. The City of Dallas reports total hardness of 120 to 155 mg/L as calcium carbonate - 7.0 to 9.1 grains per gallon - which the Water Quality Association scale classes as moderately hard to hard. In Roger Wakefield’s own field tests in Dallas homes, readings typically run 8 to 12 grains per gallon. Hard enough to scale a water heater years before its time.
Hardness is calcium and magnesium picked up as water moves through soil and rock. It is a secondary standard - not a health issue - which is why you will not find it in the city’s annual water quality report. The City of Dallas stated the range directly in a December 2023 memo to a council committee: 120 to 155 mg/L as CaCO3.
What that number means in a house: scale on the water heater’s heating surface, white crust on fixtures and glass, soap that will not quite lather, and appliances that fail early. A water heater in hard water can lose years off its service life - and that is the call a plumber eventually gets.
Sources: City of Dallas memo to the Quality of Life, Arts and Culture Committee, December 1, 2023 (hardness range 120–155 mg/L as CaCO3) · Field readings (8–12 grains): Roger Wakefield, Texas Master Plumber · City of Dallas Water Quality Report, 2025 (TCEQ “Superior” rating).
Is Dallas tap water safe to drink?
Yes, by every federal and state standard. The 2025 City of Dallas Water Quality Report shows trihalomethanes at 19.7 ppb against an 80 ppb limit, haloacetic acids at 15.1 against 60, and lead at 1.1 ppb at the 90th percentile with zero sites over the action level.
Safe and hard are different questions. The numbers below are what Dallas Water Utilities actually measured, next to the federal limit for each. Everything on this table comes from the city’s own 2025 report.
| Measure (2025 report) | Dallas result | Federal limit |
|---|---|---|
| Total trihalomethanes (TTHM) | 19.7 ppb highest average (range 6.5–21.0) | 80 ppb |
| Haloacetic acids (HAA5) | 15.1 ppb highest average (range 1.4–16.4) | 60 ppb |
| Lead, 90th percentile (2024 sampling) | 1.1 ppb · 0 sites over action level | Action level 15 ppb |
| Copper, 90th percentile (2024 sampling) | 0.39 ppm | Action level 1.3 ppm |
| Nitrate | 0.671 ppm average | 10 ppm |
| Fluoride | 0.627 ppm average | 4 ppm |
| Chlorine residual | 2.97 ppm average | 4 ppm |
Source: City of Dallas Water Quality Report, 2025. Dallas draws from seven surface sources: the Elm Fork of the Trinity River and lakes Ray Roberts, Lewisville, Grapevine, Ray Hubbard, Tawakoni and Fork.
Does Dallas have lead pipes?
Dallas Water Utilities’ service line inventory, filed with the TCEQ on October 15, 2024, currently contains no known lead service lines. Lead sampling came in at 1.1 ppb at the 90th percentile - well under the 15 ppb federal action level.
That is the utility side of the meter. The private side is the homeowner’s: houses built before the 1988 lead ban can still carry lead solder on copper joints, older brass fixtures, or galvanized pipe that collects lead particles. Dallas water is treated to be non-corrosive, which limits how much of that ends up in a glass - but the only way to know a specific tap is to test it.
You can look up your own service line in the city’s public inventory at bit.ly/DWULeadInfo, and request a test through 311.
Source: City of Dallas Water Quality Report, 2025, lead and copper section and service line inventory statement.
What about PFAS in Dallas water?
In January 2025 the City of Dallas sued 3M, DuPont and other manufacturers in federal court over PFAS contamination of area water sources, seeking $228 million. The city’s consumer reporting shows drinking water meeting the new federal PFAS limits.
PFAS - the “forever chemicals” used for decades in firefighting foam and consumer products - are the fastest-moving story in American drinking water. Dallas’s lawsuit, filed in the national PFAS litigation in South Carolina and updated in February 2025, is about who pays to keep them out of the supply, not a declaration that today’s tap water fails the standard. It does not.
For a homeowner who wants a margin of safety at the tap: test first, then treat. Carbon-based filtration certified for PFAS reduction handles it at the point of entry or point of use.
Sources: Chemical Processing, “3M, DuPont face lawsuits in Dallas over PFAS,” 2025 · The Dallas Morning News, April 24, 2025 ($228 million figure).
What should a Dallas homeowner do about hard water?
Test first, buy second. A sixty-second hardness test tells you your actual grains per gallon at the tap - then equipment gets sized to your number, not to a citywide average. Ask a licensed plumber to test before anyone quotes you a system.
The city range is 7.0 to 9.1 grains and field tests in Dallas homes typically read 8 to 12, but your house sits at one number, and treatment is sized to it. A proper whole-home setup in Dallas is usually about scale protection first - the water heater is where hardness gets expensive - with drinking-water filtration added where taste, chlorine, or PFAS is the concern.
Dallas plumbers: this market is already on your schedule
Seven to twelve grains of hardness means scaled water heaters, early appliance failure, and service calls you are already running. The HALO Water Tour teaches the water science, the product knowledge, and the revenue side of water treatment - and it comes to Dallas November 3-5, 2026.
You are already in those houses. The class teaches you what to do while you are there.
The Dallas class, November 3-5
Read the actual Dallas water reports
Do not take a marketing page’s word for your water - including this one. Here is the primary source, one click away.
Sources checked September 23, 2026
Stop guessing. Test it.
Homeowners: ask a licensed plumber to test your water before you buy anything. Plumbers: learn to turn that test into a business - twenty seats in Dallas, November 3-5.
See the Dallas classDallas water: quick answers
Is Dallas water hard?
Yes. The City of Dallas reports total hardness of 120 to 155 mg/L as calcium carbonate, which is 7.0 to 9.1 grains per gallon - moderately hard to hard on the Water Quality Association scale. In Roger Wakefield’s own field tests in Dallas homes, readings typically run 8 to 12 grains per gallon. It is hard enough to build scale in water heaters and on fixtures over time.
Is Dallas tap water safe to drink?
Yes, by every federal and state standard. Dallas Water Utilities is rated Superior by the TCEQ, and the 2025 Water Quality Report shows disinfection byproducts, lead, and every regulated contaminant below federal limits. Safe and hard are different questions - hardness is about your plumbing and appliances, not your health.
Does Dallas have lead pipes?
Dallas Water Utilities' service line inventory, filed with the TCEQ in October 2024, currently contains no known lead service lines, and lead sampling came in at 1.1 parts per billion at the 90th percentile - well under the 15 ppb federal action level. Homes built before 1988 can still have lead solder or older brass fixtures inside the house.
Does Dallas water have PFAS?
The City of Dallas sued 3M, DuPont, and other PFAS manufacturers in federal court in January 2025, seeking $228 million for contamination of area water sources. The city's own consumer reporting shows drinking water meeting the new federal PFAS limits. If PFAS is a concern in your home, test first, then treat with filtration certified for PFAS reduction.
What is the hardness of Dallas water in grains per gallon?
7.0 to 9.1 grains per gallon, based on the City of Dallas reported range of 120 to 155 mg/L as calcium carbonate. To convert any mg/L figure to grains per gallon, divide by 17.1. In Roger Wakefield’s own field tests in Dallas homes, readings typically run 8 to 12 grains per gallon.