What it means
Greywater is lightly used household water without toilet discharge. California permits certain greywater systems for landscape irrigation when piping, filtration, and setbacks meet health codes.
Greywater must never cross into potable lines or share pumps with blackwater. Kitchen sink waste is often treated as blackwater because of grease and food solids.
Why it matters in Santa Cruz County
Water-conscious homeowners in Santa Cruz, Aptos, and the mountains install laundry-to-landscape systems to irrigate drought-tolerant yards. Permits and backflow protection matter on properties served by municipal water and private wells alike.
Homeowner tip
Do not route greywater to edible gardens without understanding local permit rules and filtration needs.
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Related glossary terms
Also explore the Septic Glossary or call 831.225.4344 with questions about your property.