Tap Water Quality Report
Tap water quality in SAN BERNARDIN0, California
Tap water in SAN BERNARDIN0, California receives a grade of F (57/100) from TapWaterSafety.org. It's served by SAN BERNARDINO CITY. The most significant water quality concerns are: PFAS contamination; Perfluorohexane sulfonate (PFHXS) significantly above health guideline; Arsenic significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in SAN BERNARDIN0's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving SAN BERNARDIN0.
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.
Perfluorohexane sulfonate (PFHXS) significantly above health guideline
Moderate concernPerfluorohexane sulfonate (PFHXS) detected at 0.544 ppt, 544x above the EWG health guideline of 0.001 ppt.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 2.08 ppb, 521x 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.
EPA compliance record
Official U.S. EPA records for SAN BERNARDINO CITY (system ID CA3610039) 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 SAN BERNARDIN0
Filters matched to the specific contaminants in SAN BERNARDIN0's 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.
All contaminants detected in SAN BERNARDIN0'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 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate (PFHXS) PFAS |
0.544 ppt | 0.001 | 10.0 | — | — | — | — | 544× over |
| Arsenic Heavy metal |
2.08 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 521× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
36.2 ppb | 0.1 | 60.0 | 60 | — | — | — | 362× over |
| Chromium (hexavalent) Heavy metal |
1.14 ppb | 0.02 | — | — | — | — | — | 57× over |
| Nitrate Inorganic |
4.23 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 30× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
1.57 ppb | 0.06 | — | — | — | — | — | 26× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
2.71 ppb | 0.15 | 80.0 | 100 | — | — | — | 18× over |
| Dibromochloromethane Disinfection byproduct |
0.988 ppb | 0.1 | — | — | — | — | — | 9.9× over |
| Bromodichloromethane Disinfection byproduct |
0.483 ppb | 0.06 | — | — | — | — | — | 8.1× over |
| Uranium Radiological |
2.92 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 6.8× over |
| Bromoform Disinfection byproduct |
0.968 ppb | 0.5 | — | — | — | — | — | 1.9× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.0971 ppb | 0.06 | 5.0 | — | — | — | — | 1.6× over |
| Dibromoacetic acid Disinfection byproduct |
0.0453 ppb | 0.03 | — | — | — | — | — | 1.5× over |
| Perfluorooctanoic acid (PFOA) PFAS |
0.093 ppt | 0.09 | 4.0 | 100 | 100 | 0.007 | — | 1.0× over |
| Chloroform Disinfection byproduct |
0.161 ppb | 0.4 | — | — | — | — | — | Below guideline |
| Perchlorate Disinfection byproduct |
0.276 ppb | 1.0 | — | — | — | — | — | Below guideline |
| Chlorate Disinfection byproduct |
52.6 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Perfluorooctane sulfonate (PFOS) PFAS |
0.045 ppt | 0.3 | 4.0 | 100 | 100 | 1 | — | Below guideline |
| Vanadium Other |
3.04 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Molybdenum Other |
2.81 ppb | 40.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0202 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.000395 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
0.678 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.404 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.0393 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
0.342 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.385 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.448 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.000651 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Chloromethane Other |
0.000351 ppb | 2.69 | — | — | — | — | — | Below guideline |
| Perfluoroheptanoic acid (PFHPA) PFAS |
0.054 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Asbestos Other |
0.1 | — | 7.0 | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.0416 ppb | — | — | — | — | — | — | Below guideline |
| Dichlorodifluoromethane Other |
1.41 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.414 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
0.414 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 SAN BERNARDINO CITY.