Water Hardness California
The California Water Hardness data presented in this chart has all been verified by Aquatell directly from primary sources. Typically, this means we found the data on municipal water reports or we emailed or talked with municipal officials from the public utilities department.
If the water hardness data from your city is missing from this list please contact us and let us know. We can typically track down the info and add it to our chart in about a week.
If you're looking to reduce your water hardness level, have a look at a professional-grade water softener. Here are the water hardness values for the cities and towns in California:| City | AVG Hardness PPM / mg/L | AVG Hardness Grains per Gallon | Source |
|---|---|---|---|
| Acton | 298 | 17.4 | |
| Alameda | 156 | 9.1 | |
| Alhambra | 184 | 10.8 | |
| Alvarado | 214 | 12.5 | |
| Alviso | 51 | 3.0 | |
| Anaheim | 300 | 17.5 | |
| Antelope Valley Northeast Los Angeles County | 93 | 5.4 | |
| Antioch | 57 | 3.3 | |
| Apple Valley | 150 | 8.8 | |
| Arcadia | 195 | 11.4 | |
| Armstrong Valley | 110 | 6.4 | Armstrong Valley Water Quality Report |
| Arvin (Tejon-Castac) | 102 | 6.0 | |
| Azusa | 165 | 9.7 | |
| Bakersfield (North Garden) | 70.4 | 4.1 | North Garden Water Quality Report |
| Bakersfield | 109 | 6.4 | Bakersfield Water Quality Report |
| Baldwin Park | 190 | 11.1 | |
| Bear Gulch | 60 | 3.5 | Bear Gulch Water Quality Report |
| Bellflower | 237 | 13.9 | |
| Berkeley | 35 | 2.0 | |
| Brentwood | 368 | 21.5 | |
| Buena Park | 240 | 14.0 | |
| Burbank | 259 | 15.1 | |
| Camarillo | 89 | 5.2 | |
| Carlsbad | 228 | 13.3 | |
| Ceres | 174.2 | 10.2 | |
| Cerritos | 180 | 10.5 | |
| Chico | 122 | 7.1 | Chico Water Quality Report |
| Chino | 258 | 15.1 | |
| Chino Hills | 147 | 8.6 | |
| Chula Vista | 286.5 | 16.8 | |
| Citrus Heights | 130 | 7.6 | |
| City of Bakersfield | 66.3 | 3.9 | City of Bakersfield Water Quality Report |
| City of Commerce | 203.2 | 11.9 | City of Commerce Water Quality Report |
| Clovis | 69.5 | 4.1 | |
| Coachella | 140 | 8 | |
| Coast Springs | 91 | 5.3 | Coast Springs Water Quality Report |
| Colton | 181.2 | 10.6 | |
| Compton | 229.4 | 13.4 | |
| Concord | 77.7 | 4.5 | |
| Corona | 206 | 12.0 | |
| Costa Mesa | 119 | 7.0 | |
| Countrywood | 113.5 | 6.6 | Countrywood Water Quality Report |
| Country Meadows | 185 | 10.8 | Country Meadows Water Quality Report |
| Covina | 140 | 8.2 | |
| Coyote Valley | 241 | 14.1 | |
| Cresent City | 59 | 3 | |
| Cypress | 240 | 14.0 | |
| Daly City | 47 | 2.7 | |
| Davis | 73.8 | 4.3 | |
| Delano | 44 | 2.6 | |
| Desert View Highlands | 114.7 | 6.7 | |
| Dixon | 215 | 12.6 | Dixon Water Quality Report |
| Dominguez | 126 | 7.4 | Dominguez Water Quality Report |
| Downey | 14.4 | 0.8 | |
| Edenvale | 304 | 17.8 | |
| El Cajon | 166 | 9.7 | |
| El Monte | 270 | 15.8 | |
| El Dorado County | 15 | 0.88 | |
| Elk Grove | 90 | 5.3 | |
| Encinitas | 247 | 14.4 | |
| Escondido | 170 | 9.9 | |
| Evergreen | 98 | 5.7 | |
| Fairfield | 122 | 7.1 | |
| Folsom | 22.3 | 1.3 | |
| Fontana | 113.5 | 6.6 | |
| Foothill Estates | 195 | 11.4 | Foothill Estates Water Quality Report |
| Fountain Valley | 240 | 14.0 | |
| Fremont (Central & South) | 104 | 6.1 | |
| Fremont (North) | 125 | 7.3 | |
| Fresno | 123 | 7.2 | |
| Fullerton | 19 | 1.1 | |
| Garden Grove | 240 | 14.0 | |
| Gardena | 200 | 11.7 | |
| Gilroy | 263 | 15.4 | |
| Glendale | 12 | 0.7 | |
| Grand Oaks | 205 | 12 | Grand Oaks Water Quality Report |
| Hamilton City | 173 | 10.1 | Hamilton City Water Quality Report |
| Hanford | 11.4 | 0.7 | |
| Hawkins | 111 | 6.5 | Hawkins Water Quality Report |
| Hawthorne | 203.2 | 11.9 | Hawthorne Water Quality Report |
| Hayward | 44 | 2.6 | |
| Hemet | 257.7 | 15.1 | |
| Hermosa Beach | 508 | 29.7 | |
| Hermosa Redondo | 203.2 | 11.9 | Hermosa Redondo Water Quality Report |
| Hesperia | 68.7 | 4.0 | |
| Huntington Beach | 240 | 14.0 | |
| Huntington Park | 171.5 | 10.0 | |
| Imperial | 320 | 18.7 | |
| Indio | 110.7 | 6.5 | |
| Inglewood | 231.5 | 13.5 | |
| Irvine | 195.3 | 11.4 | |
| Isleton | 20 | 1.17 | |
| Jurupa Valley | 185 | 10.8 | |
| Kagel Canyon | 84 | 5.0 | |
| Kernville | 113.5 | 6.6 | Kernville Water Quality Report |
| King City | 205 | 12.0 | King City Water Quality Report |
| Kings Mountain | 343 | 20.1 | Kings Mountain Water Quality Report |
| La Habra | 287 | 16.8 | |
| Laguna Niguel | 240 | 14.0 | |
| Lake Forest | 240 | 14.0 | |
| Lake Hughes | 287 | 16.8 | Lake Hughes Water Quality Report |
| Lakeland | 73 | 4.3 | Lakeland Water Quality Report |
| Lake Los Angeles | 118 | 6.9 | |
| Lakeport | 183 | 10.7 | |
| Lakewood | 158 | 9.2 | |
| Lancaster | 80.5 | 4.7 | Lancaster Water Quality Report |
| La Palma | 240 | 14.0 | |
| Las Lomas | 259 | 15.2 | Las Lomas Water Quality Report |
| Leona Valley | 157 | 9.2 | Leona Valley Water Quality Report |
| Littlerock | 154.7 | 9.0 | |
| Livermore | 236.3 | 13.8 | Livermore Water Quality Report |
| Lodi | 137 | 8.0 | |
| Long Beach | 100.5 | 5.9 | |
| Los Alamitos | 240 | 14.0 | |
| Los Angeles | 127 | 7 | |
| Los Angeles - East | 203.2 | 11.9 | East Los Angeles Water Quality Report |
| Los Altos Suburban | 210 | 12.3 | Los Altos Suburban Water Quality Report |
| Lower Bodfish | 265 | 15.5 | Lower Bodfish Water Quality Report |
| Lucerne | 130 | 7.6 | Lucerne Water Quality Report |
| Lynwood | 245.2 | 14.3 | |
| Madera | 76.4 | 4.5 | |
| Malibu | 109 | 6.4 | |
| Manteca | 175 | 10.2 | |
| Marina Del Rey | 109 | 6.4 | |
| Marysville | 247 | 14.4 | Marysville Water Quality Report |
| Mecca | 393 | 23 | |
| Menifee | 144 | 8.4 | |
| Mendocino | 101 | 5 | |
| Merced | 126 | 7.4 | |
| Midway City | 240 | 14.0 | |
| Milpitas | 91 | 5.3 | |
| Miramar | 179 | 10.5 | |
| Mission Viejo | 240 | 14.0 | |
| Modesto | 194 | 11.3 | |
| Monterey Park | 220 | 12.9 | |
| Moreno Valley | 208 | 12.2 | |
| Mountain Shadows | 113.5 | 6.6 | Mountain Shadows Water Quality Report |
| Mountain View | 47 | 2.7 | |
| Mullen | 180 | 10.5 | Mullen Water Quality Report |
| Murrieta | 120.8 | 7.1 | |
| Napa | 118 | 6.9 | |
| Newark (South & Central) | 55 | 3.2 | |
| Newark (North & East) | 125 | 7.3 | |
| Newport Beach | 240 | 14.0 | |
| Noel Heights | 57 | 3.3 | Noel Heights Water Quality Report |
| Norwalk | 330 | 19.3 | |
| Oak Hills | 250 | 14.6 | Oak Hills Water Quality Report |
| Oakland | 140 | 8.2 | |
| Oceanside | 141 | 8.2 | |
| Ontario | 123 | 7.2 | |
| Onyx | 170 | 9.9 | Onyx Water Quality Report |
| Orange | 16 | 0.9 | |
| Oroville | 93 | 5.4 | Oroville Water Quality Report |
| Otay | 214 | 12.5 | |
| Oxnard | 322 | 18.8 | |
| Palmdale | 119 | 7.0 | |
| Palo Alto | 47 | 2.7 | |
| Palos Verdes | 203.2 | 11.9 | Palos Verdes Water Quality Report |
| Paramount | 171.5 | 10.0 | |
| Pasadena | 12.9 | 0.8 | |
| Pearblossom | 154.7 | 9.0 | |
| Perris | 92 | 5.4 | |
| Petaluma | 92.3 | 5.4 | |
| Pico Rivera | 241 | 14.1 | |
| Pittsburg | 63 | 3.7 | |
| Pleasanton | 89 - 460 | 5.2 - 27.0 | |
| Pomona | 206.3 | 12.1 | |
| Ponderosa Pines | 113.5 | 6.6 | Ponderosa Pines Water Quality Report |
| Porterville | 143.6 | 8.4 | |
| Poway | 117 | 6.8 | |
| Rancho Cordova | 80 | 4.7 | |
| Rancho Cucamonga | 151 | 8.8 | |
| Rancho del Paradiso | 170 | 9.9 | Rancho del Paradiso Water Quality Report |
| Rancho Santa Margarita | 240 | 14.0 | |
| Redding | 31 | 1.8 | |
| Redlands | 149 | 8.7 | |
| Redondo Beach | 508 | 29.7 | |
| Redwood City | 47 | 2.7 | |
| Rialto | 160 | 9.4 | |
| Richmond | 78 | 4.6 | |
| Riverside | 188 | 11.0 | |
| Rock Creek | 305 | 17.8 | |
| Roseville | 80.5 | 4.7 | |
| Sacramento | 102 | 6.0 | |
| Salinas | 254 | 14.9 | Salinas Water Quality Report |
| Salinas Hills | 325 | 19.0 | Salinas Hills Water Quality Report |
| San Bernardino | 251.6 | 14.7 | |
| San Carlos | 60 | 3.5 | San Carlos Water Quality Report |
| San Clemente | 240 | 14.0 | |
| San Diego | 241 | 15.0 | |
| San Francisco | 51 | 3.0 | |
| San Francisco - South | 214.5 | 12.55 | South San Francisco Water Quality Report |
| San Jose | 37 - 503 (by region) | 2 - 29 | |
| San Leandro | 78 | 4.6 | |
| San Luis Obispo | 171 | 10.0 | |
| San Marcos | 54 | 3.2 | |
| San Mateo | 60 | 3.5 | San Mateo Water Quality Report |
| San Ramon | 368 | 21.5 | |
| Santa Ana | 180.5 | 10.6 | |
| Santa Barbara | 330 | 19.3 | |
| Santa Clara | 97.5 | 5.7 | |
| Santa Clarita | 267.8 | 15.7 | |
| Santa Cruz | 175 | 10.2 | |
| Santa Maria | 146 | 8.5 | |
| Santa Monica | 162 | 9.5 | |
| Santa Rosa | 145.5 | 8.5 | |
| Seal Beach | 240 | 14.0 | |
| Selma | 51 | 3 | Selma Water Quality Report |
| Simi Valley | 182.3 | 10.7 | |
| South Gate | 220.9 | 12.9 | |
| South Lake | 243 | 14.2 | South Lake Water Quality Report |
| South San Francisco | 47 | 2.7 | |
| Split Mountain | 130 | 7.6 | Split Mountain Water Quality Report |
| Stanton | 240 | 14.0 | |
| Stockton | 88.7 | 5.19 | Stockton Water Quality Report |
| Sun Village | 154.7 | 9.0 | |
| Sunnyvale | 153 | 8.9 | |
| Sunset Beach | 240 | 14.0 | |
| Surfside | |||
| Temecula | 120.8 | 7.1 | |
| Tesoro Viejo | 34.5 | 2.0 | Tesoro Viejo Water Quality Report |
| Thousand Oaks | 119 | 7.0 | |
| Torrance | 320.5 | 18.7 | |
| Tracy | 283 | 16.6 | |
| Travis | 149 | 8.7 | Travis Water Quality Report |
| Tulare | 25.4 | 1.5 | |
| Tulco | 87 | 5.1 | Tuclo Water Quality Report |
| Turlock | 114.3 | 6.7 | |
| Tustin | 255.5 | 14.9 | |
| Union City | 125 | 7.3 | |
| Upland | 150.2 | 8.8 | |
| Upper Bodfish | 117 | 6.8 | Upper Bodfish Water Quality Report |
| Vacaville | 183 | 10.7 | |
| Val Verde | 267.8 | 15.7 | |
| Valenica | 268 | 16 | |
| Vallejo | 129 | 7.5 | |
| Ventura | 472.7 | 27.6 | |
| Victorville | 30.7 | 1.8 | |
| Visalia | 73 | 4.3 | Visalia Water Quality Report |
| Vista | 161 | 9.4 | |
| Walnut Creek | 78 | 4.6 | |
| Watsonville | 281 | 16.4 | |
| West Corvina | 150 | 8.8 | |
| Westlake | 155.5 | 9.1 | Westlake Water Quality Report |
| West Sacramento | 65 | 3.8 | |
| Westminster | 240 | 14.0 | |
| Whittier | 290 | 17.0 | |
| Willows | 175 | 10.2 | Willows Water Quality Report |
| Wofford Heights | 113.5 | 6.6 | Wofford Heights Water Quality Report |
| Woodland | 63 | 3.7 | |
| Yorba Linda | 240 | 14.0 | |
| Yuba City | 58 | 3.4 |