If you’ve noticed white buildup on your faucets or struggled to get soap to lather properly, you might be wondering about your water quality. Many Dallas homeowners ask us: “Does Dallas have hard water?”
The short answer is that specific hardness levels for Dallas municipal water aren’t published in the city’s annual water quality reports. But we can help you understand what this means for your home and how to get the information you need.
What Is Hard Water?
Hard water contains high concentrations of calcium and magnesium minerals. The U.S. Geological Survey (USGS) classifies water hardness in these categories:
- Soft water: 0-60 mg/L
- Moderately hard: 61-120 mg/L
- Hard water: 121-180 mg/L
- Very hard: More than 180 mg/L
These minerals occur naturally when water flows through limestone and other mineral-rich rock formations.
Where Dallas Water Comes From
Dallas gets its water from seven surface water reservoirs. These include the Elm Fork of the Trinity River and Lakes Ray Roberts, Lewisville, Grapevine, Ray Hubbard, Tawakoni and Fork. The water undergoes coagulation, sedimentation, filtration, and disinfection processes before it reaches your home.
As of 2024, the Dallas Water Utilities maintains a “Superior” rating from the Texas Commission on Environmental Quality (TCEQ). That means the city’s water system consistently:
- Meets and exceeds all state and federal drinking-water rules.
- Maintains excellent infrastructure, storage, and pumping capacity.
- Has had no violations or enforcement actions in recent years.
- Runs a proactive cross-connection control and source-water protection program.
Dallas Water Hardness Information
Dallas previously reported water hardness measurements between 1998 and 2004 in its annual Water Quality Reports. These reports provided residents with clear information about the concentration of calcium and magnesium minerals, but after 2004 this information was no longer included for reasons that were never explained.
Below is a table of Dallas water hardness measurements from 1998–2004.
| Year | Average (mg/L) | Range (mg/L) | USGS Category | Notes |
| 1998 | — | 80-100 | Moderately hard | Range only provided; no average reported |
| 1999 | — | 99-187 | Moderately hard → Very hard | Upper range crosses into “Very Hard” category |
| 2000 | 131 | 108-179 | Hard | First year with reported average; firmly in the Hard range |
| 2001 | 131 | 106-179 | Hard | Nearly identical to 2000 values |
| 2002 | 118 | 71-223 | Moderately hard → Very hard | Significant variability depending on source water |
| 2003 | 119 | 92-167 | Moderately hard → Hard | Values stabilized compared to 2002 |
| 2004 | 119 | 92-167 | Moderately hard → Hard | Last year Dallas publicly reported hardness levels |
Source: Data sourced directly from Dallas Water Utilities Annual Water Quality Reports (1998–2004), published on the official City of Dallas website. Measurements shown are in mg/L as calcium carbonate, following USGS water hardness standards.
View the current and past Dallas Water Quality Reports to check annual data on local water conditions.
Signs Your Dallas Home May Have Hard Water
Even without official hardness numbers, you can spot the signs yourself:
- White chalky residue builds up on faucets, shower heads, and fixtures. This is calcium carbonate scale.
- Soap doesn’t lather well in your shower or when washing dishes. Hard water minerals react with soap to create sticky soap scum.
- Spots on glassware after running the dishwasher. These are mineral deposits left behind as water evaporates.
- Scale in your water heater. Hard water forms solid deposits when heated, which can reduce your water heater’s efficiency and lifespan.
Why Hardness Levels Matter For Your Home
The EPA doesn’t set legal limits for water hardness because calcium and magnesium aren’t toxic. But hard water can still affect your daily life.
Scale buildup in pipes and appliances can reduce water pressure and equipment efficiency. Most water utilities try to avoid providing “very hard” water because of these issues.
Heating water is typically the second largest energy use in homes after space heating and cooling. Scale buildup in your water heater forces it to work harder, increasing your energy bills.
What To Do About Hard Water
If testing confirms you have hard water, professional water treatment can protect your plumbing, appliances, and water quality. Many Dallas homeowners use water softeners to reduce mineral buildup and extend the lifespan of their pipes and water-using appliances.
Bacon Plumbing Heating Air Electric offers water quality testing to pinpoint the exact hardness level in your home’s water and professional water softener installation to address the problem at its source. Our team understands North Texas water conditions and can recommend the right system for your home.
Getting Reliable Information
Dallas Water Utilities remains your best source for official water hardness data. If you are within city limits of Dallas, call 3-1-1 to speak with water quality experts who can answer questions about whether current hardness levels have changed since 2004, seasonal variations, treatment processes, and how your specific neighborhood might be affected.
Remember that while the official data is from 2004, water conditions can vary by location and time of year. Professional testing gives you the most accurate picture of your home’s current water quality.
Protect Your Home’s Plumbing And Appliances
Whether your water is moderately hard or very hard, understanding your water quality helps you make informed decisions about treatment, appliance maintenance, and home care.
Need help with water quality issues in your Dallas home? Bacon Plumbing Heating Air Electric provides comprehensive plumbing services, including water heater maintenance and replacement. Our experienced technicians understand North Texas water conditions and can help protect your home’s plumbing system.
Contact us today to schedule a water quality test or consultation for a new water softener system.
We also offer financing options to help make necessary plumbing improvements more affordable for Dallas-area homeowners.
