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 "S"

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 "S"

Sacramento

Saint Helena

Salida

Salinas

Salton City

Salyer

Samoa

San Andreas

San Anselmo

San Ardo

San Bernardino

San Bruno

San Carlos

San Clemente

San Diego

San Dimas

San Fernando

San Francisco

San Gabriel

San Geronimo

San Gregorio

San Jacinto

San Joaquin

San Jose

San Juan Bautista

San Juan Capistrano

San Leandro

San Lorenzo

San Lucas

San Luis Obispo

San Marcos

San Marino

San Martin

San Mateo

San Miguel

San Pablo

San Pedro

San Quentin

San Rafael

San Ramon

San Simeon

San Ysidro

Sanger

Santa Ana

Santa Barbara

Santa Clara

Santa Clarita

Santa Cruz

Santa Fe Springs

Santa Margarita

Santa Maria

Santa Monica

Santa Paula

Santa Rosa

Santa Ynez

Santa Ysabel

Santee

Saratoga

Sausalito

Scotia

Scott Bar

Scotts Valley

Seal Beach

Seaside

Sebastopol

Seeley

Seiad Valley

Selma

Sequoia National Park

Shafter

Shandon

Shasta

Shasta Lake

Shaver Lake

Sheridan

Sherman Oaks

Shingle Springs

Shingletown