Water Quality in SAN FRANCISCO, CA (94105)
EPA violation data for public water systems serving ZIP code 94105.
120
Total Violations
12
Health-Based
108
Monitoring / Reporting
120
Resolved
What does this mean?
120 of 120 violations have been resolved. 12 are health-based violations, meaning contaminant levels exceeded federal safety limits. The remaining 108 are monitoring or reporting violations (missed testing deadlines or late paperwork — not necessarily a water quality issue). Not all violations mean your water is unsafe. The EPA requires reporting even for minor administrative issues.
Violations Detail (120 total)
| Contaminant | Category | MCL Limit | Measured | Date | Status | Health Effects |
|---|---|---|---|---|---|---|
| Public Notice | Monitoring | N/A | N/A | Oct 3, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 3, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 3, 2024 | Resolved | N/A |
| Public Notice | Monitoring | N/A | N/A | Oct 3, 2024 | Resolved | N/A |
| DICHLOROMETHANE | Health-Based | N/A | 0.007 | Mar 31, 2024 | Resolved | N/A |
| DICHLOROMETHANE | Health-Based | N/A | 0.007 | Mar 31, 2024 | Resolved | N/A |
| DICHLOROMETHANE | Health-Based | N/A | 0.007 | Mar 31, 2024 | Resolved | N/A |
| DICHLOROMETHANE | Health-Based | N/A | 0.007 | Mar 31, 2024 | Resolved | N/A |
| DICHLOROMETHANE | Health-Based | N/A | 0.006 | Dec 31, 2023 | Resolved | N/A |
| DICHLOROMETHANE | Health-Based | N/A | 0.006 | Dec 31, 2023 | Resolved | N/A |
Violation Timeline
2024(8)
Public Notice
75
Public Notice
75
Public Notice
75
Public Notice
75
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
2023(8)
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
DICHLOROMETHANE
02
How Does This Compare?
SAN FRANCISCO (94105) has 120 recorded violations, including 12 health-based. All violations have been resolved, which is a positive sign for current water quality. Consider testing your tap water independently for added peace of mind.
Recommended Water Filters
Based on the contaminants detected in your area, these filter types may help improve your water quality.
Reverse Osmosis System
Highly effective at removing heavy metals, dissolved solids, and a wide range of contaminants. Recommended for homes with lead or arsenic concerns.
Targets:Lead, Copper, Arsenic, Mercury, Cadmium
Look for:NSF/ANSI 58 certified
Always look for filters certified by NSF International for the specific contaminants you want to remove.