67,120,050
gallons delivered in 2025
Serving members since 1968
About L.A. Water Cooperative
A member-owned water cooperative serving the Chehalem Valley across rural southwestern Washington County and northern Yamhill County.
Built by neighbors, expanded by demand
L. A. Water Cooperative was formed in 1968 by a group of local residents to deliver water to the area around and including the former Laurelwood Academy campus—the L.A. in our name.
Over the years, the Cooperative has expanded in response to the needs of the communities we serve. Today, our service area covers approximately 25 square miles of the Chehalem Valley, ranging from 180 feet on the valley floor to 1,620 feet on Bald Peak.
782
member households served
16
reservoirs and pump stations
60+
miles of pipeline
Member-led service
L. A. Water Cooperative is guided by a volunteer board of nine members. Review the current Board roster, term information, approved meeting minutes, and meeting record archive.
View board meetings and recordsOur water
Source, treatment, and water characteristics
A member-owned water cooperative serving the Chehalem Valley across rural southwestern Washington County and northern Yamhill County.
Source, treatment, and water characteristics
Where our water comes from
L.A. Water Cooperative purchases all of its water from the City of Hillsboro Utilities Commission. Hillsboro’s winter water source is the upper Tualatin River. In summer, when river levels are too low for municipal use, Hillsboro relies on water stored in Barney Reservoir and Hagg Lake.
Treatment and reliability
Hillsboro draws water from the upper Tualatin River for filtration and treatment at either the Cherry Grove Slow Sand Filter Plant or the Joint Water Commission Treatment Plant. Both facilities operate 24 hours a day, 365 days a year. L. A. Water Cooperative does not treat the water.
Fluoride and water softness
The City of Hillsboro does not fluoridate its water supply. Check with your dentist to see whether supplemental fluoride is recommended for your family. No well water is used in our supply, so the water is very soft—about 2 to 3 grains per gallon.
Questions about your water service?
Our team is here to help with member questions, billing, and service information.