Water Quality Report · Updated May 12, 2026
LIBERTY UTILITIES (AV RANCHOS) CORP.
LIBERTY UTILITIES (AV RANCHOS) CORP. delivers tap water graded D (63/100) by TapWaterSafety.org. The utility serves approximately 64,469 residents in DOWNEY, California using groundwater. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Chromium (hexavalent) significantly above health guideline. For questions, the utility can be reached at 562-805-2015.
Is DOWNEY tap water safe to drink?
LIBERTY UTILITIES (AV RANCHOS) CORP. delivers tap water that earns a grade of D (63/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including arsenic significantly above health guideline.
The utility serves 64,469 residents in DOWNEY, drawing from groundwater.
Public testing data identifies 12 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Haloacetic acids (HAA5), Chromium (hexavalent), Total trihalomethanes (TTHMs), Dibromochloromethane, Dibromoacetic acid, Haloacetic acids (HAA9), Nitrate and nitrite, Bromodichloromethane, Nitrate, Bromoform, Uranium. 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 DOWNEY residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for LIBERTY UTILITIES (AV RANCHOS) CORP..
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.01 ppb, 251x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 24.4 ppb, 244x above the EWG health guideline of 0.1 ppb.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 2.46 ppb, 123x above the EWG health guideline of 0.02 ppb.
Contact LIBERTY UTILITIES (AV RANCHOS) CORP.
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 DOWNEY
Filters matched to the specific contaminants in this water supply.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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.
Score breakdown
This utility's overall score of 63/100 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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
1.01 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 251× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
24.4 ppb | 0.1 | 60.0 | 60 | — | — | — | 244× over |
| Chromium (hexavalent) Heavy metal |
2.46 ppb | 0.02 | — | — | — | — | — | 123× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
17.6 ppb | 0.15 | 80.0 | 100 | — | — | — | 117× over |
| Dibromochloromethane Disinfection byproduct |
3.67 ppb | 0.1 | — | — | — | — | — | 37× over |
| Dibromoacetic acid Disinfection byproduct |
0.833 ppb | 0.03 | — | — | — | — | — | 28× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
1.71 ppb | 0.06 | — | — | — | — | — | 28× over |
| Nitrate and nitrite Inorganic |
2.58 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 18× over |
| Bromodichloromethane Disinfection byproduct |
0.967 ppb | 0.06 | — | — | — | — | — | 16× over |
| Nitrate Inorganic |
2.26 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 16× over |
| Bromoform Disinfection byproduct |
5.43 ppb | 0.5 | — | — | — | — | — | 11× over |
| Uranium Radiological |
0.88 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.1× over |
| Vanadium Other |
13.9 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
32.9 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.45 ppb | 40.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0113 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Aluminum Heavy metal |
13.6 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Manganese Heavy metal |
2.1 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.00275 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.486 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
0.0188 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.0372 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.442 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.0326 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.
LIBERTY UTILITIES (AV RANCHOS) CORP. service area
This water system serves 1 community in San Bernardino County, California. Click any city for its dedicated tap water quality page.
Find the right filter for DOWNEY water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.