Is Flower Mound, TX Tap Water Safe to Drink?
Flower Mound tap water is legally compliant, but one contaminant exceeds health guidelines. Specifically: PFAS above EPA limits (PFOA: 4.4 ppt — limit is 4 ppt each). A point-of-use filter is recommended for drinking and cooking water.
Hardness Scale: Where Flower Mound Falls
0Slightly
60Moderate
120Hard
180Very Hard
250Extreme
400+
How Flower Mound Compares
Flower Mound's water is close to the national average of 138 PPM, ranking #536 out of 1000 cities tracked. Within Texas, it ranks #63 of 76 cities (39% below the state average of 189 PPM). Among cities (50k-100k), Flower Mound ranks #161 of 258 for hardness.
What Flower Mound's Water Means for Your Home
Hardness: 115 PPM - Low Concern
Flower Mound's water is firmly in the moderate range at 115 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. Flower Mound has PFOA at 4.4 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
Flower Mound's surface water supply requires heavy chlorination to stay safe — but that creates a tradeoff. The treatment process generates disinfection byproducts: TTHMs at 15.6 ppb (20% of the legal limit, but 104x the EWG guideline) and HAA5 at 6 ppb (10% of the legal limit, but 60x 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 0.111 ppb, which is 5.5x 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) | 115 PPM | < 60 PPM | No federal limit | ✓ OK |
| Total Dissolved Solids | 194 PPM | < 300 PPM | 500 PPM | ✓ OK |
| PFAS (total) | 32.69 ppt | — | No total limit | Detected |
| ↳ PFOA | 4.4 ppt | 0 ppt | 4 ppt (2024) | ⚠ Exceeds |
| ↳ PFOS | 0 ppt | 0 ppt | 4 ppt (2024) | ✓ OK |
| Lead | 1.6 ppb | 0 ppb (no safe level) | 15 ppb (10 ppb in 2027) | ✓ Low |
| Chlorine / Chloramine | 0.9 mg/L | Taste threshold ~1.0 | 4.0 mg/L | ✓ Normal |
| Nitrate | 0.668 mg/L | 5 mg/L | 10 mg/L | ✓ OK |
Recommendations for Flower Mound Homes
Recommended Filter for Flower Mound
PFAS exceed EPA limits (PFOA: 4.4 ppt — limit: 4 ppt each). A certified filter reduces these contaminants effectively.
How to Test Your Water in Flower Mound
With PFAS at 32.69 ppt in Flower Mound'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 City of Flower Mound Water's annual Consumer Confidence Report for official city-level data.
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About Flower Mound's Water Supply
Water Utility: City of Flower Mound Water
Water Source: Lewisville Lake (Surface Water)
Population Served: 80,000
Hardness: 115 PPM (6.7 grains per gallon)
Flower Mound's drinking water comes from surface sources — Lewisville Lake. 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 80,000 residents.
Water quality can vary by neighborhood and season. For your exact numbers, request City of Flower Mound Water'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 City of Flower Mound Water in Flower Mound, TX, including ZIP codes:
75022, 75027, 75028, 75029, 75057, 75065, 75077
If your ZIP code is listed above, this report covers your water supply. Water quality may vary slightly by neighborhood.
Compare Flower Mound to Other Texas Cities
Frequently Asked Questions About Flower Mound Water
Is Flower Mound tap water safe to drink?
Where does Flower Mound's water come from?
Do I need a water softener in Flower Mound?
How do I remove PFAS from Flower Mound tap water?
What water filter is best for Flower Mound?
Is Flower Mound water safe for babies and infants?
What is the hardness of Flower Mound water in grains per gallon?
What are disinfection byproducts in Flower Mound'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 Flower Mound Homeowners Actually Buy
Prioritized for contaminant reduction for homes with 115 PPM water and PFAS above EPA limits.
Affiliate disclosure: we may earn a commission. Selection based on Flower Mound's water data.