San Francisco
San Francisco County, California
100 Excellent
Water Quality Score
100/100
Grade
A
Water Systems
1
Population
884,363
Key Contaminants
Selenium
42.3107 / 50 μg/L
0 μg/L MCL: 50 μg/L
Chlorine
2.1113 / 4 mg/L
0 mg/L MCL: 4 mg/L
Lead
5.9401 / 15 μg/L
0 μg/L MCL: 15 μg/L
PFAS (Per- and Polyfluoroalkyl Substances)
0.0014 / 0.004 μg/L
0 μg/L MCL: 0.004 μg/L
Haloacetic Acids (HAA5)
12.7904 / 60 μg/L
0 μg/L MCL: 60 μg/L
Chloramine
0.5133 / 4 mg/L
0 mg/L MCL: 4 mg/L
Turbidity
0.1192 / 1 NTU
0 NTU MCL: 1 NTU
Water Systems Serving San Francisco (1)
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Water quality can vary by neighborhood in San Francisco.