San Francisco, CA (94107)
Sfpuc City Distribution Division
Safety Grade 6
Health Violations 1
Filterable Contaminants
Contaminants & Recommended Filters
Best Value Recommendation
For your water profile, a Reverse Osmosis (under-sink) is the recommended starting point. It addresses Lead (95-99% effective).
Want to know exactly what's in your tap water?
EPA data shows system-wide averages. A home water test measures what actually comes out of your faucet.
Water Filter Analysis for San Francisco, CA
EPA compliance data for ZIP code 94107 shows 1 contaminant that warrant filtration: Lead. Below are filter recommendations matched to each contaminant, with cost estimates and NSF-certified options.
Lead
EPA limit: 0.015 mg/L (action level)
Causes developmental delays and learning disabilities in children, and kidney damage and high blood pressure in adults.
About This Analysis
This analysis uses data from the U.S. EPA Safe Drinking Water Information System (SDWIS), which tracks compliance monitoring for public water systems. Contaminant data reflects the past 5 years of testing. Filter recommendations are based on NSF/ANSI certified treatment technologies proven to reduce each specific contaminant.
ZIP 94107 is served by Sfpuc City Distribution Division, a surface water system. For the most accurate picture of your home's water quality, consider a professional water test.
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Frequently Asked Questions
How were these filters selected?
Filter recommendations are matched to the specific contaminants detected in your ZIP code's water system based on EPA SDWIS compliance data from the past 5 years. Each filter type is selected for its NSF/ANSI-certified effectiveness against those contaminants, so recommendations vary by location.
Do I need a whole-house or under-sink filter?
It depends on the contaminant type and your budget. Under-sink reverse osmosis systems ($150–$400) are best for drinking water contaminants like lead, nitrates, and PFAS. Whole-house systems ($800–$2,000+) treat all water entering your home and are better for sediment, chlorine, and hardness issues that also affect showers and appliances.
How often should I replace filter cartridges?
Most filter cartridges should be replaced every 6 to 12 months, depending on your water usage and contaminant levels. Carbon filters typically last 6 months, while reverse osmosis membranes last 2–3 years. Check your filter manufacturer's guidelines and replace on schedule to maintain effectiveness.