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.
Cities starting with "F"
Fair Oaks
Fairfax
Fairfield
Fall River Mills
Fallbrook
Farmersville
Farmington
Fawnskin
Fellows
Felton
Ferndale
Fiddletown
Fields Landing
Fillmore
Finley
Firebaugh
Fish Camp
Five Points
Floriston
Flournoy
Folsom
Fontana
Foothill Ranch
Forbestown
Forest Falls
Forest Knolls
Forest Ranch
Foresthill
Forestville
Forks Of Salmon
Fort Bidwell
Fort Bragg
Fort Dick
Fort Irwin
Fort Jones
Fortuna
Fountain Valley
Fowler
Frazier Park
Freedom
Fremont
French Camp
French Gulch
Fresno
Friant
Fullerton
Fulton
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.