Is Dallas, TX Tap Water Safe to Drink?
Dallas tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 4.8 ppt, PFOS: 4.75 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Dallas Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Dallas Compares
Dallas's water is 28% softer than the national average of 138 PPM - ranking in the bottom 56% for hardness nationwide. Most homes here do not need a softener. Within Texas, it ranks #67 of 76 cities (47% below the state average of 189 PPM). Among major US cities (500k+), Dallas ranks #64 of 100 for hardness.
What Dallas's Water Means for Your Home
Hardness: 100 PPM - Low Concern
Dallas's water is firmly in the moderate range at 100 PPM. You'll see some spotting on glassware and a film on shower doors over time, but it's not the kind of hardness that demands a full softener. A salt-free conditioner is worth considering if you have a tankless water heater or high-end fixtures.
Contaminants & Safety
Forever chemicals (PFAS) are worth watching here. Dallas has PFOA at 4.8 ppt and PFOS at 4.75 ppt, exceeding the EPA's 2024 limit of 4 ppt per compound. PFAS are synthetic compounds that accumulate in your body over time. A certified carbon filter or reverse osmosis system with NSF P473 certification is the most effective protection. See the regulatory timeline.
What's in the Treatment Process
Dallas's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 14.1 ppb (18% of the legal limit, but 94x the EWG guideline) and HAA5 at 7.46 ppb (12% of the legal limit, but 75x the EWG guideline). These are within legal limits, but the EWG sets much tighter thresholds based on cancer-risk research. A whole-house activated carbon filter reduces both chlorine and byproducts.
Chromium-6 was detected at 0.275 ppb, which is 14x the EWG health guideline. There's no separate federal limit for chromium-6, only total chromium. A reverse osmosis system is the most effective removal method. All measurements are within federal legal limits. The EWG guidelines represent a more conservative, health-based standard.
| Contaminant | Detected | Health Guideline | Legal Limit | Status |
|---|---|---|---|---|
| Hardness (as CaCO₃) | 100 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 220 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 49.34 ppt | — | No total limit | Detected |
| ↳ PFOA | 4.8 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 4.75 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| Lead | 1.1 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 1.9 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.69 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Dallas Homes
Recommended Filter for Dallas
PFAS exceed EPA limits (PFOA: 4.8 ppt, PFOS: 4.75 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
See all filter recommendations for DallasQuick Fix for Chlorine: Shower Filter
At 1.9 mg/L chlorine, many Dallas residents notice dry skin, brittle hair, and that "pool smell" in the shower. A shower filter installs in 5 minutes, no tools needed.
How to Test Your Water in Dallas
With PFAS at 49.34 ppt in Dallas's supply, confirming your home's specific levels is especially important. PFAS vary by neighborhood and can concentrate differently depending on your position in the distribution system.
Free option: Request Dallas Water Utilities's annual Consumer Confidence Report for official city-level data.
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About Dallas's Water Supply
Water Utility: Dallas Water Utilities
Water Source: Surface reservoirs (Surface Water)
Population Served: 1,356,479
Hardness: 100 PPM (5.8 grains per gallon)
Dallas's drinking water comes from surface sources — Surface reservoirs. Surface water requires more extensive treatment than groundwater, including coagulation, filtration, and disinfection. This heavier chlorination is why disinfection byproducts tend to be higher in surface-supplied systems. On the upside, surface sources often deliver softer water than deep aquifers. The system serves 1.4 million residents.
Water quality can vary by neighborhood and season. For your exact numbers, request Dallas Water Utilities's Consumer Confidence Report (CCR) or test your own tap.
ZIP Codes Covered by This Report
This water quality data applies to all areas served by Dallas Water Utilities in Dallas, TX, including ZIP codes:
75083, 75085, 75134, 75138, 75141, 75146, 75157, 75158, 75159, 75172, 75180, 75187, 75201, 75202, 75203, 75204, 75205, 75206, 75207, 75208, 75209, 75210, 75211, 75212, 75214, 75215, 75216, 75217, 75218, 75219, 75220, 75221, 75222, 75223, 75224, 75225, 75226, 75227, 75228, 75229, 75230, 75231, 75232, 75233, 75234, 75235, 75236, 75237, 75238, 75240, 75241, 75242, 75243, 75244, 75246, 75247, 75248, 75249, 75250, 75251, 75252, 75253, 75254, 75260, 75261, 75262, 75263, 75264, 75265, 75266, 75267, 75270, 75275, 75277, 75283, 75284, 75285, 75287, 75301, 75303, 75312, 75313, 75315, 75320, 75326, 75336, 75339, 75342, 75354, 75355, 75356, 75357, 75358, 75359, 75360, 75367, 75368, 75370, 75371, 75372, 75373, 75374, 75376, 75378, 75379, 75380, 75381, 75382, 75389, 75390, 75391, 75392, 75393, 75394, 75395, 75397, 75398
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Dallas to Other Texas Cities
Frequently Asked Questions About Dallas Water
Is Dallas tap water safe to drink?
Where does Dallas's water come from?
Do I need a water softener in Dallas?
How do I remove PFAS from Dallas tap water?
What water filter is best for Dallas?
Is Dallas water safe for babies and infants?
What is the hardness of Dallas water in grains per gallon?
What are disinfection byproducts in Dallas's water?
Data sources: Lead and copper data from EPA Safe Drinking Water Act LCR reporting. Contaminant data from utility-reported testing results. PFAS data from EPA UCMR5 (2023–2025). Hardness from USGS and municipal reports. Data reflects system-level testing results and may not match your specific tap due to neighborhood plumbing, season, or recent utility changes. For your utility's latest results, request their Consumer Confidence Report (CCR). Our methodology. Last updated: 2026-02-24.
What Dallas Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 100 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Dallas's water data.