City of Hillsboro, OR
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Protection of public health is the City of Hillsboro Water Department’s number one priority. The water customers drink and use every day is tested regularly to ensure every drop is safe and of the highest quality.
Each year, Hillsboro Water publishes Water Quality Reports - also referred to as Consumer Confidence Reports (CCRs) - for Hillsboro's two 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-system Water System customers located in western Washington County along Hillsboro’s original water service line, from the community of Dilley, along Highway 47, then up to the community Cherry Grove.
2026 Water Quality Report Highlights
- Drinking Water Sources and Source Water Protection Efforts
- Project Updates for the Willamette Water Supply System
- The Water Treatment Process from the Joint Water Commission
- Water Quality Sampling Results
- Lead and Drinking Water
- Water Conservation Tips
- Emergency Preparedness Tips
Reports are prepared in accordance with the Environmental Protection Agency’s (EPA) Federal Safe Drinking Water Act and the Oregon Public Health Division requirements.
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