California Water Quality Directory

Find detailed information about water quality in cities and ZIP codes across California. Discover which contaminants might be present and understand how they compare to EPA and recommended limits.

All A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Cities starting with "C"

About Water Quality

Water quality is a measure of the suitability of water for a particular use based on selected physical, chemical, and biological characteristics. In California, water quality can vary significantly by location, affected by factors such as:

Understanding Contaminants

Water contaminants include a wide range of substances from natural minerals to industrial chemicals. Some have health implications, while others affect taste, odor, or appearance of water.

EPA Standards

The Environmental Protection Agency (EPA) sets legal limits for contaminants in drinking water. These standards protect public health by limiting the levels of contaminants allowed.

Health Guidelines

Beyond EPA limits, there are often stricter health-based guidelines recommended by scientists and health organizations for optimal water quality.

Common Contaminants

Common water contaminants in California include arsenic, lead, nitrates, bacteria, pesticides, and industrial chemicals that can vary by region.

California Water Quality Directory

Cities starting with "C"

Cabazon

Calabasas

Calexico

Caliente

California City

California Hot Springs

Calimesa

Calipatria

Calistoga

Callahan

Calpine

Camarillo

Cambria

Camino

Camp Meeker

Camp Nelson

Camp Pendleton

Campbell

Campo

Campo Seco

Camptonville

Canby

Canoga Park

Cantil

Cantua Creek

Canyon

Canyon Country

Canyon Dam

Capay

Capistrano Beach

Capitola

Cardiff By The Sea

Carlotta

Carlsbad

Carmel

Carmel By The Sea

Carmel Valley

Carmichael

Carnelian Bay

Carpinteria

Carson

Caruthers

Casmalia

Caspar

Cassel

Castaic

Castella

Castro Valley

Castroville

Cathedral City

Catheys Valley

Cayucos

Cazadero

Cedar Glen

Cedarpines Park

Cedarville

Ceres

Cerritos

Challenge

Chatsworth

Chester

Chico

Chilcoot

Chinese Camp

Chino

Chino Hills

Chowchilla

Chualar

Chula Vista

Citrus Heights

Claremont

Clarksburg

Clayton

Clearlake

Clearlake Oaks

Clements

Clio

Clipper Mills