California Water Quality
Tap water quality data for 83 cities and their water systems
48 of 83 Cities
Sorted by population served
Los Angeles
Utility serves 3.9M
East Bay
Utility serves 1.4M
San Diego
Utility serves 1.4M
San Jose
Utility serves 1.2M
California
Utility serves 1.0M
Eastern Municipal Wd
Utility serves 667K
Fresno
Utility serves 546K
Sacramento
Utility serves 520K
Long Beach
Utility serves 467K
Irvine Ranch
Utility serves 445K
Anaheim
Utility serves 349K
Santa Ana
Utility serves 311K
Riverside
Utility serves 298K
Santa Clarita Valley
Utility serves 294K
Gswc - Southwest
Utility serves 278K
Helix
Utility serves 278K
Coachella Vwd: Cove Community
Utility serves 270K
Cws - Bakersfield
Utility serves 268K
San Gabriel Valley
Utility serves 258K
Modesto
Utility serves 246K
Otay
Utility serves 238K
San Gabriel Valley Wc - Fontana
Utility serves 238K
Golden State
Utility serves 225K
San Bernardin0
Utility serves 215K
Cucamonga Valley
Utility serves 211K
Los Angeles Cwwd 40 Reg 4 & 34 Lancaster
Utility serves 208K
Huntington Beach
Utility serves 201K
Oxnard
Utility serves 200K
Contra Costa
Utility serves 198K
Stockton
Utility serves 197K
Sweetwater Authority
Utility serves 191K
Liberty
Utility serves 190K
Glendale
Utility serves 189K
Marin Municipal
Utility serves 187K
Ontario
Utility serves 185K
Scwa - Laguna/vineyard
Utility serves 185K
Santa Rosa
Utility serves 175K
Garden Grove
Utility serves 174K
Oceanside
Utility serves 171K
Moulton Niguel
Utility serves 170K
Elsinore Valley Mwd
Utility serves 169K
Corona
Utility serves 169K
Santa Margarita
Utility serves 168K
Pasadena
Utility serves 164K
Hayward
Utility serves 163K
Bakersfield
Utility serves 160K
Sunnyvale
Utility serves 158K
Roseville
Utility serves 156K