Tap Water Quality Report
Tap water quality in LEAGUE CITY, Texas
Tap water in LEAGUE CITY, Texas receives a grade of D (65/100) from TapWaterSafety.org. It's served by CITY OF LEAGUE CITY. 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 LEAGUE CITY's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving LEAGUE CITY.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 44.1 ppb, 735x above the EWG health guideline of 0.06 ppb.
Bromochloroacetic acid significantly above health guideline
Moderate concernBromochloroacetic acid detected at 5.91 ppb, 296x above the EWG health guideline of 0.02 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 26.9 ppb, 269x above the EWG health guideline of 0.1 ppb.
Recommended filters for LEAGUE CITY
Filters matched to the specific contaminants in LEAGUE CITY'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 LEAGUE CITY'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 |
44.1 ppb | 0.06 | — | — | — | — | — | 735× over |
| Bromochloroacetic acid Disinfection byproduct |
5.91 ppb | 0.02 | — | — | — | — | — | 296× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
26.9 ppb | 0.1 | 60.0 | 60 | — | — | — | 269× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
35.3 ppb | 0.15 | 80.0 | 100 | — | — | — | 236× over |
| Bromodichloromethane Disinfection byproduct |
9.21 ppb | 0.06 | — | — | — | — | — | 153× over |
| Dichloroacetic acid Disinfection byproduct |
18.9 ppb | 0.2 | — | — | — | — | — | 94× over |
| Trichloroacetic acid Disinfection byproduct |
6.14 ppb | 0.1 | — | — | — | — | — | 61× over |
| Chloroform Disinfection byproduct |
20.9 ppb | 0.4 | — | — | — | — | — | 52× over |
| Dibromoacetic acid Disinfection byproduct |
1.45 ppb | 0.03 | — | — | — | — | — | 48× over |
| Dibromochloromethane Disinfection byproduct |
3.27 ppb | 0.1 | — | — | — | — | — | 33× over |
| Nitrate Inorganic |
0.372 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 2.7× over |
| Radium, combined (-226 and -228) Radiological |
0.14 pCi/L | 0.05 | 5.0 | — | — | — | — | 2.7× over |
| Chromium (hexavalent) Heavy metal |
0.0427 ppb | 0.02 | — | — | — | — | — | 2.1× over |
| Atrazine Pesticide/Herbicide |
0.144 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| 1,2,3-Trichloropropane Other |
0.000933 ppb | 0.0007 | — | — | — | — | — | 1.3× over |
| Bromoform Disinfection byproduct |
0.464 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Simazine Pesticide/Herbicide |
0.0563 ppb | 0.1 | 4.0 | — | — | — | — | Below guideline |
| Bromochloromethane Other |
0.013 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
38.7 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
59.1 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Manganese Heavy metal |
7.07 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Molybdenum Other |
1.74 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.703 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Di(2-ethylhexyl) phthalate Semi-volatile organic compound |
0.0526 ppb | 3.0 | 6.0 | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.47 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.297 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Xylenes (total) Volatile organic compound |
0.288 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| Cyanide Inorganic |
16.0 ppb | — | 200.0 | 50 | 70 | 150 | — | Below guideline |
| Fluoride Inorganic |
0.377 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Hexadecanoic acid Other |
10.4 ppb | — | — | — | — | — | — | Below guideline |
| Methyl isobutyl ketone Other |
0.118 ppb | — | — | — | — | — | — | Below guideline |
| Octadecanoic acid Other |
39.2 ppb | — | — | — | — | — | — | 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 LEAGUE CITY.