Tap Water Quality in San Francisco, California (ZIP 94102)
Serving San Francisco, California
Is the Tap Water Safe in San Francisco, California?
Tap water in San Francisco, California (ZIP 94102) has 7 contaminants with an EPA health goal detected in some samples (no level on file) in at least one of the 1 city served. We recommend reviewing detailed city reports below and considering a certified water filter for additional protection.
ZIP 94102 is served by 5 water utilities providing water to San Francisco. Water quality varies by utility and city. Click on the cities below to see detailed reports for your specific area.
How does California water quality rank nationally? →Get your water tested in California →
Water Hardness in ZIP 94102
Sources differ on this value: reported figures range 1.2–24.5 mg/L. We publish the best-supported utility value above.
California water hardness →US water hardness data →Hardness calculator & converter →US hardness map →
Water Quality Report for ZIP 94102
No reading above its guideline, but not a clean record
The record for ZIP 94102 shows 7 contaminants with an EPA health goal detected in some samples (no level on file).
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Upload my testWater Utilities Serving ZIP 94102
PRESIDIO OF SAN FRANCISCO
Serves San Francisco; EPA holds no ZIP-level record for this system.
SFPUC CITY DISTRIBUTION DIVISION
Serves San Francisco; EPA holds no ZIP-level record for this system.
884,363
Water Source:
Surface water purchased
Contaminants:
105 results on file
TREASURE ISLAND
Serves San Francisco; EPA holds no ZIP-level record for this system.
3,790
Water Source:
Surface water purchased
Contaminants:
11 results on file
SAN FRANCISCO REGIONAL WATER SYSTEM
Serves San Francisco; EPA holds no ZIP-level record for this system.
HHW&P MOCCASIN COMPOUND-SFPUC
Serves San Francisco; EPA holds no ZIP-level record for this system.
217
Water Source:
Surface water purchased
Contaminants:
73 results on file
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Frequently Asked Questions about San Francisco Tap Water
Is the tap water safe in San Francisco, California (ZIP 94102)?
Which water utilities serve ZIP code 94102?
How do I pay my water bill in San Francisco (ZIP 94102)?
What contaminants are in San Francisco water (ZIP 94102)?
Should I use a water filter in San Francisco (ZIP 94102)?
What cities are in ZIP code 94102?
How we built this page
Water-quality data on this page comes from public federal and state records for the 5 utilityies serving ZIP 94102. We refresh each utility's record whenever its underlying source publishes new data.
- Contaminants & violations: EPA Safe Drinking Water Information System (SDWIS) plus the Unregulated Contaminant Monitoring Rule (UCMR-5) for PFAS and emerging contaminants.
- Annual reports: the most recent published Consumer Confidence Report (CCR) from each utility serving this ZIP, where available.
- Service area & contact: EPA SDWIS. The compliance records it holds for these systems are reported to EPA by CA State Water Resources Control Board, Div. of Drinking Water, the state's drinking-water primacy agency.
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