Tap Water Quality Report
Tap water quality in CEDAR PARK, Texas
Tap water in CEDAR PARK, Texas receives a grade of D (65/100) from TapWaterSafety.org. It's served by CITY OF CEDAR PARK. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in CEDAR PARK's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving CEDAR PARK.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 37.5 ppb, 625x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.13 ppb, 533x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 39.7 ppb, 265x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for CITY OF CEDAR PARK (system ID TX2460009) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for CEDAR PARK
Filters matched to the specific contaminants in CEDAR PARK's 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.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
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 CEDAR PARK'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 |
37.5 ppb | 0.06 | — | — | — | — | — | 625× over |
| Arsenic Heavy metal |
2.13 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 533× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
39.7 ppb | 0.15 | 80.0 | 100 | — | — | — | 265× over |
| Bromochloroacetic acid Disinfection byproduct |
4.73 ppb | 0.02 | — | — | — | — | — | 237× over |
| Bromodichloromethane Disinfection byproduct |
11.7 ppb | 0.06 | — | — | — | — | — | 195× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
13.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 136× over |
| Dibromoacetic acid Disinfection byproduct |
3.44 ppb | 0.03 | — | — | — | — | — | 115× over |
| Dibromochloromethane Disinfection byproduct |
10.6 ppb | 0.1 | — | — | — | — | — | 106× over |
| Trichloroacetic acid Disinfection byproduct |
3.53 ppb | 0.1 | — | — | — | — | — | 35× over |
| Chloroform Disinfection byproduct |
13.3 ppb | 0.4 | — | — | — | — | — | 33× over |
| Dichloroacetic acid Disinfection byproduct |
6.67 ppb | 0.2 | — | — | — | — | — | 33× over |
| Bromoform Disinfection byproduct |
4.18 ppb | 0.5 | — | — | — | — | — | 8.4× over |
| Nitrate Inorganic |
0.0979 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Barium Heavy metal |
64.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
1.88 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.72 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.382 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.00427 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Fluoride Inorganic |
0.623 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Hexadecanoic acid Other |
15.0 ppb | — | — | — | — | — | — | Below guideline |
| Octadecanoic acid Other |
42.5 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 CEDAR PARK.