San Francisco County, California
59 ZIP codes · Avg score 55/100 · Grade C · Updated 2026-06-04
The systems supplying San Francisco County's 59 ZIP codes vary in performance — most meet minimum standards, but violations in select areas are on record.
How San Francisco County Compares
How San Francisco County Compares
San Francisco County scores 18 points below the California state average (73/100) and 13 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-04
ZIP Code Risk Map
Water Quality Map: San Francisco County, California
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 8.9 (asthma 8.4%, diabetes 10.2%)
Estimated additional annual cost per homeowner: $1,145, driven primarily by sea_level
Infrastructure: 0.389% avg pipe failure probability, 41% of ZIPs at high risk
Violation History (2021–2024)
→ Stable trendEPA violation counts by year across San Francisco County water systems. Health-based shown in red, total in blue.
Peak year: 2022 with 177 violations. Past 5 years: 354 total (354 health-based).
Source: EPA SDWIS historical violations. Data may lag 6–12 months for the most recent year.
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $1,145
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Water Safety Affordability
How much it costs to fix water issues relative to home values in San Francisco County
Remediation costs are relatively manageable for most homeowners in San Francisco County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for San Francisco County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in San Francisco County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | Presidio of San Francisco | 3,500 | 413 |
| 2 | Six Acres Water Company | 66 | 413 |
| 3 | Sonoma County Mutual Water Company | 40 | 413 |
| 4 | Sunrise Mobilehome Park | 37 | 413 |
| 5 | Sfpuc City Distribution Division | 848,019 | 189 |
7 total water systems serve San Francisco County.
All ZIP Codes in San Francisco County
59 ZIP codes tracked in San Francisco County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 94102 | San Francisco | 59 | C | 7 (6 health) | $996K |
| 2 | 94103 | San Francisco | 59 | C | 7 (6 health) | $1058K |
| 3 | 94104 | San Francisco | 59 | C | 7 (6 health) | $1993K |
| 4 | 94105 | San Francisco | 59 | C | 7 (6 health) | $1462K |
| 5 | 94107 | San Francisco | 59 | C | 7 (6 health) | $1227K |
| 6 | 94108 | San Francisco | 59 | C | 7 (6 health) | $1208K |
| 7 | 94109 | San Francisco | 59 | C | 7 (6 health) | $1390K |
| 8 | 94110 | San Francisco | 59 | C | 7 (6 health) | $1500K |
| 9 | 94114 | San Francisco | 59 | C | 7 (6 health) | $1772K |
| 10 | 94115 | San Francisco | 59 | C | 7 (6 health) | $1684K |
| 11 | 94118 | San Francisco | 59 | C | 7 (6 health) | $1817K |
| 12 | 94120 | San Francisco | 59 | C | 7 (6 health) | — |
| 13 | 94121 | San Francisco | 59 | C | 7 (6 health) | $1635K |
| 14 | 94122 | San Francisco | 59 | C | 7 (6 health) | $1507K |
| 15 | 94123 | San Francisco | 59 | C | 7 (6 health) | $2000K |
| 16 | 94124 | San Francisco | 59 | C | 7 (6 health) | $1043K |
| 17 | 94127 | San Francisco | 59 | C | 7 (6 health) | $1898K |
| 18 | 94131 | San Francisco | 59 | C | 7 (6 health) | $1750K |
| 19 | 94132 | San Francisco | 59 | C | 7 (6 health) | $1459K |
| 20 | 94133 | San Francisco | 59 | C | 7 (6 health) | $1519K |
| 21 | 94111 | San Francisco | 54 | D | 7 (6 health) | $1217K |
| 22 | 94112 | San Francisco | 54 | D | 7 (6 health) | $1160K |
| 23 | 94116 | San Francisco | 54 | D | 7 (6 health) | $1450K |
| 24 | 94101 | San Francisco | 53 | D | 7 (6 health) | — |
| 25 | 94117 | San Francisco | 53 | D | 7 (6 health) | $1641K |
| 26 | 94119 | San Francisco | 53 | D | 7 (6 health) | — |
| 27 | 94125 | San Francisco | 53 | D | 7 (6 health) | — |
| 28 | 94126 | San Francisco | 53 | D | 7 (6 health) | — |
| 29 | 94129 | San Francisco | 53 | D | 7 (6 health) | — |
| 30 | 94130 | San Francisco | 53 | D | 7 (6 health) | — |
| 31 | 94134 | San Francisco | 53 | D | 7 (6 health) | $1064K |
| 32 | 94136 | San Francisco | 53 | D | 7 (6 health) | — |
| 33 | 94137 | San Francisco | 53 | D | 7 (6 health) | — |
| 34 | 94139 | San Francisco | 53 | D | 7 (6 health) | — |
| 35 | 94140 | San Francisco | 53 | D | 7 (6 health) | — |
| 36 | 94141 | San Francisco | 53 | D | 7 (6 health) | — |
| 37 | 94142 | San Francisco | 53 | D | 7 (6 health) | — |
| 38 | 94143 | San Francisco | 53 | D | 7 (6 health) | — |
| 39 | 94144 | San Francisco | 53 | D | 7 (6 health) | — |
| 40 | 94145 | San Francisco | 53 | D | 7 (6 health) | — |
| 41 | 94146 | San Francisco | 53 | D | 7 (6 health) | — |
| 42 | 94147 | San Francisco | 53 | D | 7 (6 health) | — |
| 43 | 94150 | San Francisco | 53 | D | 7 (6 health) | — |
| 44 | 94151 | San Francisco | 53 | D | 7 (6 health) | — |
| 45 | 94153 | San Francisco | 53 | D | 7 (6 health) | — |
| 46 | 94154 | San Francisco | 53 | D | 7 (6 health) | — |
| 47 | 94156 | San Francisco | 53 | D | 7 (6 health) | — |
| 48 | 94158 | San Francisco | 53 | D | 7 (6 health) | $1501K |
| 49 | 94159 | San Francisco | 53 | D | 7 (6 health) | — |
| 50 | 94160 | San Francisco | 53 | D | 7 (6 health) | — |
| 51 | 94161 | San Francisco | 53 | D | 7 (6 health) | — |
| 52 | 94162 | San Francisco | 53 | D | 7 (6 health) | — |
| 53 | 94163 | San Francisco | 53 | D | 7 (6 health) | — |
| 54 | 94164 | San Francisco | 53 | D | 7 (6 health) | — |
| 55 | 94171 | San Francisco | 53 | D | 7 (6 health) | — |
| 56 | 94172 | San Francisco | 53 | D | 7 (6 health) | — |
| 57 | 94175 | San Francisco | 53 | D | 7 (6 health) | — |
| 58 | 94177 | San Francisco | 53 | D | 7 (6 health) | — |
| 59 | 94188 | San Francisco | 53 | D | 7 (6 health) | — |
Recommended Buyer Guides for San Francisco County
While many sites publish identical guide lists across every county they cover, the selection here changes by location — driven by the EPA, NSF, FEMA, and CDC datasets that describe the actual conditions documented for this jurisdiction in the federal record.
- Best Under-Sink Reverse Osmosis Systems — Multi-contaminant removal at the kitchen tap
Deep Dive Reports
Detailed analysis for San Francisco County, California
Overview
San Francisco County in California covers 59 ZIP codes with an average Home Safety Score of C (55/100).
59 of 59 ZIP codes have recorded EPA violations. 354 health-based violations have been documented.
← Back to California water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.