Water Quality Report · Updated October 07, 2026
CITY OF LEWISVILLE
CITY OF LEWISVILLE delivers tap water graded C (72/100) by TapWaterSafety.org. The utility serves approximately 140,880 residents in LEWISVILLE, Texas using surface water. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Bromochloroacetic acid significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. For questions, the utility can be reached at 972-219-3404.
Is LEWISVILLE tap water safe to drink?
CITY OF LEWISVILLE delivers tap water that earns a grade of C (72/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 140,880 residents in LEWISVILLE, drawing from surface water. Despite being legal under US EPA standards, this water would fail the European Union's Drinking Water Directive, primarily due to haloacetic acids (haa9) significantly above health guideline.
Public testing data identifies 15 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Bromochloroacetic acid, Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Bromodichloromethane, Dichloroacetic acid, Dibromoacetic acid, Trichloroacetic acid, Dibromochloromethane, Chloroform, Chromium (hexavalent), Nitrate and nitrite, Nitrate, Atrazine, Simazine. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
EPA compliance record
Official U.S. EPA records for CITY OF LEWISVILLE (system ID TX0610004) for the last 3 years. Checked 2026-10-07.
| Rule | Type | Since | Status |
|---|---|---|---|
| Lead and Copper Rule | Missed testing or reporting | 12/30/2025 | Resolved |
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Quick actions for LEWISVILLE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITY OF LEWISVILLE.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 30.5 ppb, 508x above the EWG health guideline of 0.06 ppb.
Bromochloroacetic acid significantly above health guideline
Moderate concernBromochloroacetic acid detected at 4.1 ppb, 205x above the EWG health guideline of 0.02 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 16.1 ppb, 161x above the EWG health guideline of 0.1 ppb.
Contact CITY OF LEWISVILLE
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for LEWISVILLE
Filters matched to the specific contaminants in this water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 72/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
30.5 ppb | 0.06 | — | — | — | — | — | 508× over |
| Bromochloroacetic acid Disinfection byproduct |
4.1 ppb | 0.02 | — | — | — | — | — | 205× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
16.1 ppb | 0.1 | 60.0 | 60 | — | — | — | 161× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
17.1 ppb | 0.15 | 80.0 | 100 | — | — | — | 114× over |
| Bromodichloromethane Disinfection byproduct |
5.47 ppb | 0.06 | — | — | — | — | — | 91× over |
| Dichloroacetic acid Disinfection byproduct |
10.5 ppb | 0.2 | — | — | — | — | — | 53× over |
| Dibromoacetic acid Disinfection byproduct |
0.959 ppb | 0.03 | — | — | — | — | — | 32× over |
| Trichloroacetic acid Disinfection byproduct |
2.72 ppb | 0.1 | — | — | — | — | — | 27× over |
| Dibromochloromethane Disinfection byproduct |
2.44 ppb | 0.1 | — | — | — | — | — | 24× over |
| Chloroform Disinfection byproduct |
9.06 ppb | 0.4 | — | — | — | — | — | 23× over |
| Chromium (hexavalent) Heavy metal |
0.195 ppb | 0.02 | — | — | — | — | — | 9.7× over |
| Nitrate and nitrite Inorganic |
0.876 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.3× over |
| Nitrate Inorganic |
0.683 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.9× over |
| Atrazine Pesticide/Herbicide |
0.167 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Simazine Pesticide/Herbicide |
0.115 ppb | 0.1 | 4.0 | — | — | — | — | 1.1× over |
| Bromoform Disinfection byproduct |
0.251 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
68.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
27.5 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0343 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Molybdenum Other |
2.28 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
36.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
1.79 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
11.9 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
6.17 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.123 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.143 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
4.2 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
4.2 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.301 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Acetone Other |
7.27 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
0.917 ppb | — | 100.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
42.8 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Fluoride Inorganic |
0.442 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Nitrite Inorganic |
0.0041 ppm | — | 1.0 | — | — | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
CITY OF LEWISVILLE service area
This water system serves 1 community in Denton County, Texas. Click any city for its dedicated tap water quality page.
Find the right filter for LEWISVILLE water
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