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Public Water Systems
Browse all public water systems ranked by drinking water quality based on EPA SDWIS data.
Los Angeles Department of Water and Power
Los Angeles, CA
Serves 4,000,000 people
72 B
New York City Department of Environmental Protection
New York, NY
Serves 8,500,000 people
84 B
Chicago Department of Water Management
Chicago, IL
Serves 2,700,000 people
68 C
Houston Public Works
Houston, TX
Serves 2,300,000 people
75 B
San Diego County Water Authority
San Diego, CA
Serves 3,300,000 people
85 B
City of Phoenix Water Services Department
Phoenix, AZ
Serves 1,600,000 people
82 B
Philadelphia Water Department
Philadelphia, PA
Serves 1,500,000 people
79 B
San Antonio Water System
San Antonio, TX
Serves 1,500,000 people
77 B
San Jose Water Company
San Jose, CA
Serves 1,000,000 people
88 B
Dallas Water Utilities
Dallas, TX
Serves 1,300,000 people
73 B