Water Quality Report · Updated October 07, 2026
AZUSA LIGHT AND WATER
AZUSA LIGHT AND WATER delivers tap water graded F (47/100) by TapWaterSafety.org. The utility serves approximately 110,044 residents in AZUSA, California using surface water. The most significant water quality concerns are: PFAS contamination; Arsenic significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline. For questions, the utility can be reached at 626-812-5173.
Is AZUSA tap water safe to drink?
AZUSA LIGHT AND WATER delivers tap water that earns a grade of F (47/100) from TapWaterSafety.org — a poor rating, with significant contamination concerns and/or recent violations.
The utility serves 110,044 residents in AZUSA, drawing from surface water.
Public testing data identifies 18 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Haloacetic acids (HAA5), Haloacetic acids (HAA9), Total trihalomethanes (TTHMs), Bromodichloromethane, Dibromoacetic acid, Dibromochloromethane, Trichloroacetic acid, Chloroform, Dichloroacetic acid, Nitrate, Chromium (hexavalent), Perfluorooctanoic acid (PFOA), Bromoform, Nitrate and nitrite, Perfluorooctane sulfonate (PFOS), Uranium, Tetrachloroethylene (perchloroethylene). 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.
EPA compliance record
Official U.S. EPA records for AZUSA LIGHT AND WATER (system ID CA1910007) 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.
Quick actions for AZUSA residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for AZUSA LIGHT AND WATER.
PFAS contamination
Severe concernPerfluorooctane sulfonate (PFOS), Perfluorooctanoic acid (PFOA) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.47 ppb, 369x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 36.2 ppb, 362x above the EWG health guideline of 0.1 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 21.7 ppb, 362x above the EWG health guideline of 0.06 ppb.
Contact AZUSA LIGHT AND WATER
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 AZUSA
Filters matched to the specific contaminants in this water supply.
Filter certified for PFOA/PFOS (NSF/ANSI 53 or 58)
$180-$750Reverse osmosis and some carbon block filters reduce PFAS. Look for certification to NSF/ANSI 53 or 58 for PFOA/PFOS.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
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 47/100 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 |
1.47 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 369× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
21.7 ppb | 0.06 | — | — | — | — | — | 362× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
34.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 232× over |
| Bromodichloromethane Disinfection byproduct |
7.95 ppb | 0.06 | — | — | — | — | — | 132× over |
| Dibromoacetic acid Disinfection byproduct |
3.04 ppb | 0.03 | — | — | — | — | — | 101× over |
| Dibromochloromethane Disinfection byproduct |
9.36 ppb | 0.1 | — | — | — | — | — | 94× over |
| Trichloroacetic acid Disinfection byproduct |
3.66 ppb | 0.1 | — | — | — | — | — | 37× over |
| Chloroform Disinfection byproduct |
12.7 ppb | 0.4 | — | — | — | — | — | 32× over |
| Dichloroacetic acid Disinfection byproduct |
4.26 ppb | 0.2 | — | — | — | — | — | 21× over |
| Nitrate Inorganic |
2.3 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 16× over |
| Chromium (hexavalent) Heavy metal |
0.303 ppb | 0.02 | — | — | — | — | — | 15× over |
| Perfluorooctanoic acid (PFOA) PFAS |
1.23 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 14× over |
| Bromoform Disinfection byproduct |
4.69 ppb | 0.5 | — | — | — | — | — | 9.4× over |
| Nitrate and nitrite Inorganic |
0.9 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 6.4× over |
| Perfluorooctane sulfonate (PFOS) PFAS |
1.01 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | 3.4× over |
| Uranium Radiological |
1.06 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 2.5× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.0776 ppb | 0.06 | 5.0 | — | — | — | — | 1.3× over |
| Perchlorate Disinfection byproduct |
0.877 ppb | 1.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
76.7 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
86.3 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
1.21 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
1.79 ppb | 40.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0099 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.167 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.406 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
1.59 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.41 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.29 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.421 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.376 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.165 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.255 ppm | — | 4.0 | 1.5 | 1.5 | — | — | 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.
AZUSA LIGHT AND WATER service area
This water system serves 1 community in Los Angeles County, California. Click any city for its dedicated tap water quality page.
Find the right filter for AZUSA water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.