Tap Water Quality Report
Tap water quality in LEWISVILLE, Texas
Tap water in LEWISVILLE, Texas receives a grade of D (67/100) from TapWaterSafety.org. It's served by CITY OF LEWISVILLE. 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. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in LEWISVILLE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving 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.
Recommended filters for LEWISVILLE
Filters matched to the specific contaminants in LEWISVILLE's water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in LEWISVILLE's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. 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, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from CITY OF LEWISVILLE.