Water Quality

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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.

The City of Hillsboro Water Department proudly serves high-quality drinking water to more than 93,000 customers. Every drop of water that runs through customers’ taps comes out of a river, or a dam and reservoir.

Water Sampling

To ensure your drinking water meets or exceeds state and federal drinking water standards, each month hundreds of water samples are collected and tested by a state-certified laboratory. Due to the potential health effects of bacteria and other microscopic organisms that can be found in untreated water, the Joint Water Commission water treatment plant filters and chlorinates every drop of drinking water delivered to Hillsboro Water customers.

Water Quality Reports

Each year, Hillsboro Water publishes Water Quality Reports - also referred to as Consumer Confidence Reports (CCRs) - for Hillsboro's 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-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.

Test results show the drinking water served by Hillsboro Water to customers is safe, clean, and continues to exceed all federal and state standards.