Tap Water Quality Report
Tap water quality in Santa Ana, California
Tap water in Santa Ana, California receives a grade of D (65/100) from TapWaterSafety.org. It's served by Santa Ana Water Utilities. The most significant water quality concerns are: Arsenic significantly above health guideline; Chromium-6 detected. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database, and Santa Ana's published Consumer Confidence Report.
What's in Santa Ana's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving Santa Ana.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 3.29 ppb, 822x above the EWG health guideline of 0.004 ppb.
Chromium-6 detected
Moderate concernChromium-6 detected at 0.16 ppb.
Recommended filters for Santa Ana
Filters matched to the specific contaminants in Santa Ana's water supply.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
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 Santa Ana'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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
3.29 ppb | 0.004 | 10 | 10 | 10 | 0.004 | 2022 | 822× over |
| Haloacetic Acids (HAA5) Disinfection byproduct |
11.8 ppb | 0.1 | 60 | 60 | — | — | 2024 | 118× over |
| Chromium-6 (Hexavalent) Heavy metal |
0.181 ppb | 0.02 | — | — | — | 0.02 | 2023 | 9.0× over |
| Total Trihalomethanes (TTHMs) Disinfection byproduct |
2.91 ppb | 0.6 | 80 | 100 | — | — | 2022 | 4.9× over |
| Lead Heavy metal |
0.826 ppb | 0 | 15 | 5 | 10 | 0.2 | 2022 | — |
| Contaminant | Detected (2024) | EWG | EPA | EU DWD | WHO | CA PHG | Status |
|---|---|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) Disinfection byproduct |
11.8 ppb | 0.1 | 60 | 60 | — | — | 118× over |
| Contaminant | Detected (2023) | EWG | EPA | EU DWD | WHO | CA PHG | Status |
|---|---|---|---|---|---|---|---|
| Chromium-6 (Hexavalent) Heavy metal |
0.181 ppb | 0.02 | — | — | — | 0.02 | 9.0× over |
| Contaminant | Detected (2022) | EWG | EPA | EU DWD | WHO | CA PHG | Status |
|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
3.29 ppb | 0.004 | 10 | 10 | 10 | 0.004 | 822× over |
| Total Trihalomethanes (TTHMs) Disinfection byproduct |
2.91 ppb | 0.6 | 80 | 100 | — | — | 4.9× over |
| Lead Heavy metal |
0.826 ppb | 0 | 15 | 5 | 10 | 0.2 | — |
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 Santa Ana Water Utilities.
General Contact
Water Quality Contact
For questions about contaminants or test results.