Drinking water quality · 2024
· Verified
What's in Lewisville, TX tap water
27 contaminants were measured in the Lewisville, TX water system's 2024 annual report. Each is shown below against its federal limit.
- Reporting year
- 2024
- Contaminants measured
- 27
- Over federal limit
- 0
- Approaching the limit
- 0
- Service area
- TX
PFAS — EPA UCMR5 (2023–2025)
4 PFAS compounds detected in Lewisville, TX
The EPA finalized the first-ever federal drinking-water limits for six PFAS compounds in April 2024. These numbers come straight from EPA's UCMR5 lab dataset — every U.S. system serving more than 3,300 people tested every PFAS sample at an entry point to its distribution system. PFAS not listed below were either tested and not detected, or not yet sampled.
PFBA
● Detected (no federal limit)PFHxA
● Detected (no federal limit)PFPeA
● Detected (no federal limit)PFBS
● Detected (no federal limit)Where your water comes from · EPA SDWIS
Lewisville, TX's drinking water comes from surface water, drawn from 2 sources.
Source
- INTAKE · 2
Treatment
- SWTP - CITY OF LEWISVILLE
- BOOSTER PLANT - S VALLEY PARKWAY
- BOOSTER PLANT - WINDHAVEN PARKWAY
- + 1 more
Distribution
Also buys water from DALLAS WATER UTILITY, UTRWD REGIONAL WATER TREATMENT PLANT.
Compliance history
Federal Safe Drinking Water Act violation & enforcement records (EPA SDWIS). A violation is a regulatory determination by the state or EPA — separate from the measured levels above.
- Monitoring & reporting1 violation on record · most recent Dec 20251 open
Source: EPA SDWIS / ECHO. View the full federal record on EPA ECHO ↗
Disinfection byproducts
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| BromateA disinfection byproduct formed when bromide-containing water is treated with ozone. | 5.5 ug/LRunning annual avgSystem-wide | 0 ug/LMCLG | Within the limit |
| TTHMTotal trihalomethanes — a group of four chemicals (including chloroform) formed when chlorine reacts with natural organic matter. | 22.7 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| HAA5Haloacetic acids — a group of five disinfection byproducts formed when disinfectants react with organic matter. | 14.2 ug/LRunning annual avgSystem-wide | None set | Within the limit |
| BromodichloromethaneA trihalomethane disinfection byproduct. | 4 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| BromoformA trihalomethane disinfection byproduct. | 1.36 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| ChloroformA trihalomethane formed when chlorine reacts with organic matter in water. | 3.17 ug/LAverageSystem-wide | None set | Detected — no federal limit |
| DibromochloromethaneA trihalomethane disinfection byproduct. | 4.07 ug/LAverageSystem-wide | None set | Detected — no federal limit |
Inorganic chemicals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Cyanide | 99 ug/LReported levelSystem-wide | None set | Within the limit |
| FluorideA mineral often added to drinking water to help prevent tooth decay. | 0.65–0.706 mg/LRangeSystem-wide | 4 mg/LMCLG | Within the limit |
| NitrateA compound from fertilizer runoff, septic systems, and erosion of natural deposits. | 0.8 mg/LReported levelSystem-wide | 10 mg/LMCLG | Within the limit |
| NitriteA compound from fertilizer runoff, sewage, and erosion of natural deposits. | 0.017 mg/LReported levelSystem-wide | 1 mg/LMCLG | Within the limit |
| ChlorideA naturally occurring salt compound. | 36.23 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SulfateA naturally occurring mineral from rock and soil. | 74.2 mg/LAverageSystem-wide | None set | Detected — no federal limit |
Metals
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| CopperA metal that enters water from corroding household plumbing. | 0.26 mg/L90th percentileAt the tap | 1.3 mg/LMCLG | Within the limit |
| ArsenicA naturally occurring element that also enters water from industry and agriculture. | 1.5 ug/LReported levelSystem-wide | 0 ug/LMCLG | Within the limit |
| BariumA metal from erosion of natural deposits and industrial discharge. | 0.027–0.036 mg/LRangeSystem-wide | 2 mg/LMCLG | Within the limit |
| LeadA toxic metal that leaches into water from old service lines, solder, and plumbing fixtures. | 0.0 mg/L90th percentileAt the tap | 0.015 mg/LAction level | None detected |
| AluminumA common element sometimes used as a treatment coagulant. | 0.012 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| ManganeseA naturally occurring metal from soil and rock. | 0.003 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| SodiumA naturally occurring salt component. | 32.77 mg/LAverageSystem-wide | None set | Detected — no federal limit |
VOCs & pesticides
Other
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| Chromium | 2.7 ug/LReported levelSystem-wide | None set | Within the limit |
Radionuclides
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| RadonA naturally occurring radioactive gas that can dissolve into groundwater. | Not detected pCi/LReported levelSystem-wide | None set | None detected |
Physical & aggregate
| Contaminant | Measured | Federal limit | Status |
|---|---|---|---|
| AlkalinityA measure of the water's capacity to neutralize acids. | 104.7 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| Bicarbonate | 104.7 mg/LAverageSystem-wide | None set | Detected — no federal limit |
| HardnessA measure of dissolved calcium and magnesium minerals. | 162 mg/LAverageSystem-wide | None set | Detected — no federal limit |
People also ask about Lewisville, TX's water
+Is Lewisville, TX tap water safe to drink in 2024?
Every one of the 27 contaminants measured in Lewisville, TX's 2024 Consumer Confidence Report is below its federal limit. "Safe" under the EPA's drinking-water standards is health-based, not aesthetic — but by those standards, no measured contaminant in this report exceeds its enforceable threshold. Individual health concerns (e.g. immunocompromised, infant, pregnancy) may warrant additional filtering regardless of compliance.
+What contaminants are in Lewisville, TX tap water?
27 contaminants were measured in Lewisville, TX's 2024 Consumer Confidence Report, spanning disinfection byproducts, metals, and inorganic chemicals. 8 have an enforceable federal limit; the rest are detected but unregulated. Every measured value, in the utility's own units, is on this page.
+Where does the data on this page come from?
Every value is transcribed from Lewisville, TX's 2024 Consumer Confidence Report — the annual drinking-water report every U.S. public water utility is required by federal law to publish. The original source document is archived and viewable on this site. A water-quality report covers an entire service area, not a single address.
+How often is Lewisville, TX's water quality data updated?
Each U.S. public water utility publishes one Consumer Confidence Report per year, covering the prior calendar year's measurements. This page reflects the 2024 report; a new report will replace it once the utility publishes its next annual update.