Good Water Quality
| Contaminant | Detected Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| Lead |
1.4
|
15 ppb | 1 ppb | Warning |
| Compound | Level | EPA MCL | Health Guideline | Status |
|---|---|---|---|---|
| PFOS | 22.0 ppt | 4 ppt | 4 ppt | Exceeded |
| PFBA | 10.0 ppt | No standard | 500 ppt | Unregulated |
| PFHxS | 7.0 ppt | 10 ppt | 10 ppt | Below limit |
| PFPeA | 5.6 ppt | No standard | — | Unregulated |
| PFOA | 5.5 ppt | 4 ppt | 4 ppt | Exceeded |
| PFBA | 5.3 ppt | No standard | 500 ppt | Unregulated |
Water Quality Summary
Tap water quality in San Gabriel, California (91776) receives an overall grade of B (Good) with a score of 76 out of 100, based on analysis of EPA compliance data, contaminant testing, and violation history. This is roughly in line with the California state average of 81. The area is served by 5 water systems providing water to approximately 387,664 people, using surface water and groundwater sources. Testing has found elevated levels of Lead that warrant attention. Notably, 2 PFAS compounds exceed EPA limits — a significant concern given the persistent nature of these chemicals.
A score of 76/100 means the water in San Gabriel, CA is generally good and meets EPA standards, with only minor areas of concern. There may be low levels of detectable contaminants or a small number of non-critical violations. Most residents can feel comfortable with their tap water quality, though basic filtration can provide an extra layer of protection.
Health Information
Lead is a toxic metal that can leach from aging pipes and plumbing fixtures.
Even low levels of lead exposure can cause developmental delays in children, kidney damage, and cardiovascular effects in adults. The EPA action level is 15 ppb, but health experts recommend no safe level of lead in drinking water.
Lead enters water primarily through corrosion of lead service lines, lead solder, and brass fixtures — especially in homes built before 1986.
If lead is detected above 1 ppb, consider using a certified lead-removal filter (NSF/ANSI 53) for drinking and cooking water. Run cold water for 30 seconds before use if water has been sitting in pipes.
Common Questions
Based on EPA data, tap water in San Gabriel, California receives a grade of B (Good) with a score of 76/100. This indicates the water meets federal standards and has relatively few concerns. However, individual homes may still have localized issues such as lead from old plumbing.
ZIP code 91776 is served by 5 water systems using surface water, groundwater sources, providing water to approximately 387,664 people. Multiple source types mean your water may come from a blend of surface and underground sources.
Lead was detected at 1.4 ppb in San Gabriel, California. While this is below the EPA action level of 15 ppb, it exceeds the health guideline of 1 ppb recommended by health organizations. Consider a certified lead filter, especially if you have young children.
Yes — 6 PFAS compounds were detected in water serving San Gabriel, California, and 2 exceed EPA maximum contaminant levels. PFAS are persistent chemicals linked to cancer, immune system effects, and developmental issues. A reverse osmosis or activated carbon filter certified for PFAS removal is recommended.
Water systems serving San Gabriel, California have received 8 violations in the last 5 years. Violations can range from paperwork issues (monitoring & reporting) to serious health-based violations where contaminant levels exceeded safe limits. Review the violation details above for specifics.
Based on detected contaminants (lead, PFAS), residents in San Gabriel, California should consider: Reverse osmosis (RO) system — most effective for PFAS, lead, and other contaminants. Always look for filters with NSF/ANSI certification for the specific contaminants you want to remove.