Hillsboro Water has released its 2025 Water Quality Report, also known as the Consumer Confidence Report (CCR), providing detailed information about the quality of drinking water delivered to customers throughout the previous calendar year. The report confirms that from January 1 through December 31, 2024, Hillsboro Water met — and exceeded — all state and federal drinking water standards.

Each year, Hillsboro Water conducts extensive testing to monitor for the presence of biological, inorganic, volatile organic, and synthetic organic contaminants. In 2024, hundreds of water samples were collected and analyzed. The results showed no violations of water quality standards, demonstrating the continued reliability and safety of the city's drinking water.

Hillsboro Water provides drinking water to close to 93,000 people in three community water systems:

• In-town Water System: Customers located west of Cornelius Pass Road and south of Highway 26 (Sunset Highway), as well as the area to the west between Hillsboro and Cornelius.
• Upper Water System: Customers in western Washington County along Hillsboro’s original water service line, from the community of Dilley, along Highway 47, then up to the Cherry Grove community. 
• Butternut Creek Water System: Customers located off SE Butternut Creek Parkway.

Since 1940, Hillsboro’s primary winter water source has been the upper-Tualatin River and its tributaries. During summer months, water from Barney Reservoir and Scoggins Reservoir (Hagg Lake) supplements supply to meet increased seasonal demand.

Water is treated at the Joint Water Commission (JWC) Water Treatment Plant, which is operated by state-certified drinking water professionals. The facility has a production capacity of up to 85 million gallons per day and performs critical treatment processes to ensure the highest quality drinking water is delivered to customers. 

Beginning in 2026, Hillsboro Water will diversify its water supply with the addition of a new source: the Willamette River. The Willamette Water Supply System (WWSS) is a strategic advancement to diversify water sources. Harnessing water from both the upper-Tualatin River and Willamette River provides resiliency and adaptability for the water system.

When complete, the WWSS will be one of Oregon’s most seismically-resilient water systems — built to better withstand natural disasters, protect public health, and more quickly restore critical services.

In addition to water quality data, the 2024 report includes a variety of customer-focused programs and information:

• Water Conservation Tips – Practical strategies to reduce water use indoors and outdoors.
• Water Efficiency Rebates – Incentives of up to $475 for purchasing qualified water- and energy-efficient appliances.
• Emergency Preparedness Tips – Guidance on storing and accessing safe water in the event of an emergency.

Hillsboro Water remains committed to delivering safe, high-quality drinking water, making wise investments on water infrastructure, and developing a reliable water supply for tomorrow’s generation.