b'W A T E R A N D S E W E RPotable Water 26 regulated water systems (12 Community Water Systems, 6 Non-Transient Non-Community Water Systems, and 8 Transient Non-Community Water Systems) All 26 water systems rely on both surface water and ground water wells to provide potable water to residents or employees.Largest Community Water Systems Lewiston Orchards Irrigation District The Lewiston Orchard Project uses water for irrigation by diverting surface water from within the Lapwai Creek Basin, which is primarily located within the Nez Perce Reservation, along with a small amount from the Captain John Creek drainage, which is outside the reservation and tributary to the Snake River.3 The Lewiston Orchards Irrigation District area lies in the southeastern portion of the City of Lewiston, Idaho. The service area for the system covers approximately 4,000 acres on a plateau overlooking the central portion of the City.4 4 active wells, 3 active storage reservoirs City of Lewiston The City of Lewiston obtains its water supply from the Clearwater River and six wells. The Clearwater river and Well #4 provides about 90% of our water usage. It is treated in mixed-media lters with chemical addition for pretreatment and chlorine for disinfection. Groundwater from six wells is used for irrigation and domestically. Two are used solely for irrigation. Well #2 is used for irrigation in North Lewiston at the ball elds and Rose Garden and Well #3 is utilized for irrigation at Normal Hill Cemetery. Well #4 water is blended with river water at the plant. Well #5 water is added in the Echo Hills area. Well #6 is blended in the SW Reservoir. Well #1A is used in the Low Reservoir distribution area. The distribution system includes six booster stations and nine nished water reservoirs with a capacity of 15.95 million gallons. These sources and facilities supply water for domestic, irrigation and re protection within the Citys service area.5 City of Lapwai Three wells provide water for the residents of Lapwai.6 The Nez Perce Reservation operates ve public water systems, one of which is a Transient non-community, the Clearwater Express Casino and four community water systems: Bureau of Indian Aairs (BIA) North Idaho Agency, North Lapwai , South Lapwai , and Kamiah. The North Lapwai water utility serves 100 people in a community water system approximately 1.7 miles north of the City of Lapwai and 1.7 miles south of the Clearwater River. BIA North Idaho Agency serves a community of 290 people located 0.5 miles south of the City of Lapwai. South Lapwai serves a community of approximately 60 people located 1.2 miles south of the City of Lapwai. BIA and South Lapwai are located west of Lapwai Creek and Highway 95; North Lapwai is located east of Lapwai Creek and Highway 95.7PWS ID PWS Name PWS Type PrimaryPopulation Source ServedID2350036 COUGAR RIDGE WATER & SEWER Community water system Ground water 183ID2350003 CULDESAC CITY OF Community water system Ground water 382ID2350038 EAGLES POINTE SUBDIVISION Community water system Ground water 110ID2350008 EATON MOBILE HOME COURT Community water system Ground water 94ID2350011 LAPWAI CITY OF Community water system Ground water 1,137ID2350014 LEWISTON CITY OF Community water system Surface water 15,001ID2350015 LEWISTON ORCHARDS IRRIGATION DIST Community water system Ground water 20,000532 I D A H O I N F R A S T R U C T U R E G U I D E B O O K'