Tap Water Quality Report
Tap water quality in San Bernardino, California
Tap water in San Bernardino, California receives a grade of B (86/100) from TapWaterSafety.org. It's served by SAN BERNARDINO VALLEY WD. The most significant water quality concerns are: Chromium (hexavalent) significantly above health guideline; Nitrate and nitrite significantly above health guideline; Nitrate significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in San Bernardino's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving San Bernardino.
Chromium (hexavalent) significantly above health guideline
Moderate concernChromium (hexavalent) detected at 1.18 ppb, 59x above the EWG health guideline of 0.02 ppb.
Nitrate and nitrite significantly above health guideline
Moderate concernNitrate and nitrite detected at 4.2 ppm, 30x above the EWG health guideline of 0.14 ppm.
Nitrate significantly above health guideline
Moderate concernNitrate detected at 3.91 ppm, 28x above the EWG health guideline of 0.14 ppm.
EPA compliance record
Official U.S. EPA records for SAN BERNARDINO VALLEY WD (system ID CA3610019) 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 Bernardino
Filters matched to the specific contaminants in San Bernardino's water supply.
Carbon block filter certified to NSF/ANSI 42 + 53
$180-$599A certified carbon block filter handles most baseline water quality concerns.
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 Bernardino'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 |
|---|---|---|---|---|---|---|---|---|
| Chromium (hexavalent) Heavy metal |
1.18 ppb | 0.02 | — | — | — | — | — | 59× over |
| Nitrate and nitrite Inorganic |
4.2 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 30× over |
| Nitrate Inorganic |
3.91 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 28× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
3.17 ppb | 0.15 | 80.0 | 100 | — | — | — | 21× over |
| Tetrachloroethylene (perchloroethylene) Volatile organic compound |
0.87 ppb | 0.06 | 5.0 | — | — | — | — | 15× over |
| Uranium Radiological |
4.3 pCi/L | 0.43 | 20.0 | 30 | 30 | 0.43 | — | 10× over |
| Vanadium Other |
2.05 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Trichlorotrifluoroethane Other |
5.0 ppb | 4000.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.4 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, 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 VALLEY WD.