Tap Water Quality Report
Tap water quality in COVINA, California
Tap water in COVINA, California receives a grade of F (54/100) from TapWaterSafety.org. It's served by 3 public water systems, primarily SUBURBAN WATER SYSTEMS-SAN JOSE. The most significant water quality concerns are: Haloacetic acids (HAA5) significantly above health guideline; Chromium (hexavalent) significantly above health guideline; Arsenic significantly above health guideline; PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in COVINA's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utilities serving COVINA.
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.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 5.38 ppb, 269x above the EWG health guideline of 0.02 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.585 ppb, 146x above the EWG health guideline of 0.004 ppb.
PFAS contamination
Severe concernPerfluorononanoic acid (PFNA), Perfluorooctane sulfonate (PFOS) detected. PFAS are persistent chemicals linked to cancer and immune effects with no known safe exposure threshold.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 2.86 ppt, 2862x above the EWG health guideline of 0.001 ppt.
EPA compliance record
Official U.S. EPA records for SUBURBAN WATER SYSTEMS-SAN JOSE (system ID CA1910205) 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.
Water systems serving COVINA
COVINA is served by 3 public water systems. Click any utility to see its complete grade card and treatment plant contact info.
SUBURBAN WATER SYSTEMS-SAN JOSE
- Haloacetic acids (HAA5) significantly above health guideline
- Chromium (hexavalent) significantly above health guideline
- Arsenic significantly above health guideline
SUBURBAN WATER SYSTEMS-WHITTIER
- PFAS contamination
- Perfluorohexane sulfonate (PFHXS) significantly above health guideline
- Arsenic significantly above health guideline
SUBURBAN WATER SYSTEMS-LA MIRADA
- PFAS contamination
- Arsenic significantly above health guideline
- Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Recommended filters for COVINA
Filters matched to the specific contaminants in COVINA'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 COVINA'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorooctanoic acid (PFOA) PFAS |
7.03 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | EPA violation |
| Perfluorooctane sulfonate (PFOS) PFAS |
13.5 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | EPA violation |
| Perfluorohexane sulfonate (PFHXS) PFAS |
2.86 ppt | 0.001 | 10.0 | — | — | — | — | 2862× over |
| Arsenic Heavy metal |
5.2 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 1300× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
24.2 ppb | 0.06 | — | — | — | — | — | 403× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Chromium (hexavalent) Heavy metal |
5.38 ppb | 0.02 | — | — | — | — | — | 269× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
26.5 ppb | 0.15 | 80.0 | 100 | — | — | — | 176× over |
| Bromodichloromethane Disinfection byproduct |
6.5 ppb | 0.06 | — | — | — | — | — | 108× over |
| Perfluorodecanoic acid (PFDA) PFAS |
0.65 ppt | 0.006 | — | — | — | — | — | 108× over |
| Dibromochloromethane Disinfection byproduct |
8.96 ppb | 0.1 | — | — | — | — | — | 90× over |
| Dibromoacetic acid Disinfection byproduct |
2.65 ppb | 0.03 | — | — | — | — | — | 88× over |
| Perfluorononanoic acid (PFNA) PFAS |
0.353 ppt | 0.006 | 10.0 | — | — | — | — | 59× over |
| Nitrate Inorganic |
4.03 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 29× over |
| Nitrate and nitrite Inorganic |
2.4 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 17× over |
| Dichloroacetic acid Disinfection byproduct |
2.72 ppb | 0.2 | — | — | — | — | — | 14× over |
| Bromoform Disinfection byproduct |
5.83 ppb | 0.5 | — | — | — | — | — | 12× over |
| Trichloroacetic acid Disinfection byproduct |
1.17 ppb | 0.1 | — | — | — | — | — | 12× over |
| Chloroform Disinfection byproduct |
4.59 ppb | 0.4 | — | — | — | — | — | 11× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.381 ppb | 0.06 | 5.0 | — | — | — | — | 6.4× over |
| Uranium Radiological |
1.68 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 3.9× over |
| Perchlorate Disinfection byproduct |
1.66 ppb | 1.0 | — | — | — | — | — | 1.7× over |
| Trichloroethylene Volatile organic compound |
0.589 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | 1.5× over |
| Molybdenum Other |
22.1 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
105.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.171 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Manganese Heavy metal |
39.3 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Vanadium Other |
5.08 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
48.6 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| N-Nitrosodimethylamine (NDMA) Other |
0.164 ppt | 3.0 | — | — | — | — | — | Below guideline |
| Cobalt Other |
1.64 ppb | 70.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
7.51 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Chloromethane Other |
0.0168 ppb | 2.69 | — | — | — | — | — | Below guideline |
| Selenium Heavy metal |
0.143 ppb | 30.0 | 50.0 | 20 | 40 | 30 | — | Below guideline |
| Bromochloromethane Other |
0.000258 ppb | 0.06 | — | — | — | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
3.96 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
3.09 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Monochloroacetic acid Disinfection byproduct |
0.16 ppb | 53.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
3.79 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.025 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.684 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.548 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.00103 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.41 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.176 ppb | — | — | — | — | — | — | Below guideline |
| Butylated hydroxyanisole Other |
0.00265 ppb | — | — | — | — | — | — | Below guideline |
| Chromium (total) Heavy metal |
2.73 ppb | — | 100.0 | — | — | — | — | 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 SUBURBAN WATER SYSTEMS-SAN JOSE.