The following zones are in the Nevada County Sanitation District 1:

• Lake Wildwood, Zone 1
• Lake of the Pines, Zone 2
• North San Juan, Zone 4
• Gold Creek, Zone 5
• Penn Valley, Zone 6
• Mountain Lakes Estates, Zone 7
• Cascade Shores, Zone 8
• Eden Ranch, Zone 9
• Higgins Village, Zone 11
• Valley Oak Court, Zone 12

View District zone maps.