Water Quality Report · Updated May 12, 2026
CITY OF CEDAR PARK
CITY OF CEDAR PARK delivers tap water graded D (62/100) by TapWaterSafety.org. The utility serves approximately 86,939 residents in CEDAR PARK, Texas using surface water. 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. For questions, the utility can be reached at 512-923-4472.
Is CEDAR PARK tap water safe to drink?
CITY OF CEDAR PARK delivers tap water that earns a grade of D (62/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including haloacetic acids (haa9) significantly above health guideline.
The utility serves 86,939 residents in CEDAR PARK, drawing from surface water.
Public testing data identifies 12 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Arsenic, Total trihalomethanes (TTHMs), Bromochloroacetic acid, Bromodichloromethane, Haloacetic acids (HAA5), Dibromoacetic acid, Dibromochloromethane, Trichloroacetic acid, Chloroform, Dichloroacetic acid, Bromoform. 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.
Quick actions for CEDAR PARK 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 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.
Contact CITY OF CEDAR PARK
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 CEDAR PARK
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 62/100 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 |
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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
CITY OF CEDAR PARK service area
This water system serves 1 community in Williamson County, Texas. Click any city for its dedicated tap water quality page.
Find the right filter for CEDAR PARK water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.