San Francisco, CA 94115
3 water systems • 1,420 residents
Moderate water quality - consider filtration
Score: 52/100
Graded on EPA violations, contaminants, severity, compliance, and enforcement history. See methodology.
Data updated June 2026 • Sources: EPA ECHO and EPA Envirofacts
18
Contaminants Detected
196
Violations on Record
54
Health-Based Violations
0
Recent Violations
Grade Breakdown
52 / 100 points
Recommended Water Filters
- ✓Point-of-Use Carbon Filter (NSF-certified for lead)
- ✓Ultraviolet (UV) Purification
- ✓Activated Carbon Filter (disinfection byproducts)
Consult a water quality specialist for personalized recommendations.
San Francisco vs CA & National Average
Detected Contaminants
18 contaminants detected across water systems serving this ZIP code
| Contaminant | Category |
|---|---|
| TTHM | Disinfection Byproduct |
| Lead and Copper Rule | Heavy Metal |
| Coliform (TCR) | Microorganism |
| Revised Total Coliform Rule | Microorganism |
| 2,4-D | Other |
| 2,4,5-TP | Other |
| BHC-GAMMA | Other |
| Chlorine | Other |
| Consumer Confidence Rule | Other |
| Endrin | Other |
| Groundwater Rule | Other |
| Methoxychlor | Other |
| Public Notice | Other |
| Toxaphene | Other |
| Combined Radium (-226 and -228) | Radiological |
| Gross Alpha, Excl. Radon and U | Radiological |
| Radium-226 | Radiological |
| Radium-228 | Radiological |
Water System Information
- Systems Serving This ZIP:
- VILLA DIANN MHP, HILLCREST ESTATES MHP, BY WAY MOBILE HOME PARK
- Population Served:
- 1,420
- Systems With Violations:
- 3 of 3
- Major Violations:
- 38
- Enforcement Actions:
- 192
Frequently Asked Questions
What does the grade mean?
Our A–F grade ranks this ZIP code's water quality against every other analyzed ZIP in the country, based on EPA data. A = among the best, F = among the most troubled.
Is my tap water safe to drink?
Water systems regulated by the EPA must comply with Safe Drinking Water Act standards. However, if you're concerned about water quality, consider a water filter appropriate for your contaminants.
How often is the data updated?
We update our data quarterly with the latest EPA ECHO and Envirofacts data. Historical violations are tracked to identify patterns.
What filters do you recommend?
Filter recommendations are based on detected contaminants in your area. See our Filter Guide for detailed information about different filter types.