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Water Quality

Corvallis drinking water continues to meet all federal and state drinking water standards. Providing our customers with a safe and reliable drinking water supply is a primary mission of the Corvallis Public Works Department. Our commitment to water quality excellence has in many cases carried us beyond state and federal requirements.

Water Distribution FAQs

Backflow Prevention

The City of Corvallis supplies drinking water to the community that meets all EPA and Oregon Health Division requirements for public health and safety. Even though the water that reaches your home or business is safe, it can be contaminated within your own piping system and could degrade water quality in the rest of the City water system, should that water backflow into the City water mains. Most modern water-using fixtures and appliances (sinks, toilets, and clothes washers) have built-in backflow prevention features, but there are some that don't.

System Maintenance

Your meter is located in the sidewalk in front of your residence. The City is responsible for the maintenance of the water line from the street to the meter. The property owner is responsible for maintaining the lines from the meter to the house. In the event you experience frozen pipes or broken water lines in your house or on your property, you can turn off your water at the meter — look for a small wheel or handle in the water meter box.

Water Distribution

To make sure there is enough water available for our customers and for fire protection, eight reservoirs with a total capacity of 21 million gallons are located throughout the city. Booster stations pump water up from the Taylor Plant to the reservoirs, which are located on hills around town. Once the water is in the reservoirs, it can then flow by gravity to homes and businesses in town as it is needed. 

Water Treatment FAQ

Water Quality Monitoring

Before the water reaches your tap, samples from the water treatment plants, reservoirs, and numerous locations throughout the distribution system are tested. More than 100 tests are performed each day by treatment plant operators. Additional water testing is also performed at the City's Water Quality Lab. Lab personnel routinely conduct more than 3,000 drinking water tests each year. Hundreds of other required tests are performed by state-certified contract labs that specialize in drinking water analyses.

Water Facilities

The City of Corvallis owns and operates two water treatment facilities. Both the Rock Creek and the Taylor Water Treatment Plants use a four-step process to produce high-quality drinking water. Water treatment is necessary because in nature, water is not always clean enough for humans to consume. During 2020, the two treatment plants produced 2.45 billion gallons of water. 

The H.D. Taylor Water Treatment Plant 

Water Quality Regulations

The federal Safe Drinking Water Act of 1974 and the 1986 and 1996 amendments were developed to insure the quality and safety of the nation’s drinking water. The federal government, through the U.S. Environmental Protection Agency (EPA), has the authority to regulate public water systems to protect public health. The EPA sets national drinking water standards and establishes drinking water testing methods. 

Water Treatment

Water treatment is the process of cleaning the water. Treatment makes the water safe to drink because in nature, water is not always clean enough for humans to use. Both the Rock Creek and Taylor Water Treatment Plants use a four-step process to provide safe, clean drinking water to the residents and businesses of Corvallis. 

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