Water Quality Programs

Most drinking water, particularly in urban areas, is obtained through public water systems that serve multiple homes or entire communities. These can be groundwater wells or surface water intakes (pipes drawing from streams and rivers). If a well or intake serves more than three homes or connections, it is regulated as a public water system in Oregon.

If you get a monthly water bill, the name and telephone number of your water system operator should be on the bill. Call this number for more information on the source of your drinking water. You can also access information on the water system using the Oregon Health Authority Drinking Water Program’s online database. (See “Drinking Water Data Online” and use the water system “WS Name Lookup” feature to find your water system.)

If you're a renter and don't receive a water bill, call your landlord for the water system name. Other potential sources of information about your water include DEQ’s interactive map viewer, your local county health department, your local Oregon Water Resources Department watermaster district office at 503-378-8455, or the OHA Drinking Water Program at 971-673-0405.
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In rural areas, household drinking water commonly comes from private wells (or less commonly, through surface water intakes). If your water comes from a household well or intake (serving one to three households), it is considered a "private" or "domestic" water supply” in Oregon. If you get your water from a private well or intake, you're responsible for its maintenance, testing and operation. DEQ provides some limited information for private well owners and more is available from Oregon Health Authority’s Domestic Well Safety program.

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Public water systems by law must sample and test for contamination on a regular basis and report the results to consumers. You can get the most recent "Consumer Confidence Report" for your water system from the water provider. Find the contact person for your water system and access the most recent test results on OHA's Drinking Water Services website. Click on "Data Online" and use the "WS Name Look Up" or "WS ID Look Up" to access system information.

Additional resources for understanding public water system regulations and treatment are on OHA's Drinking Water Program website. The “For Consumers” section (in the right sidebar) has information on the possible health effects of drinking water with various chemicals, home treatment systems and consumer confidence reports.

For additional help in understanding public water system regulations and treatment, call OHA's Drinking Water Program at 971-673-0405.

​Source Water Assessments are reports that provide data, maps, and technical information about the source of drinking water to each public water system. Source water assessments for Oregon public water systems were completed between 1999 and 2005.  DEQ and OHA will be providing updates to many of the assessments in 2016 and 2017.  The updated source water assessments supplement the original assessment and provide the water systems and communities more detailed information on the watershed or recharge area that supplies their well, spring or intake (the “drinking water source area”). Public water systems and local communities can use the information in the assessments to voluntarily develop and implement drinking water protection strategies.

• View/Request Source Water Assessment Reports and Updates

Maps of the groundwater and surface water drinking water source areas and potential contaminant sources identified within those drinking water source areas are also available in several other formats including an online interactive mapping tool and GIS data layers.

• List of Potential Contaminant Sources and Impacts
• Typical Contaminants from Land Uses/Sources
• Poster: Identifying Potential Contaminant Sources with Geospatial Information Systems [PDF] [JPEG] 
• Source Water Assessment Inventory

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​The Safe Drinking Water Act currently regulates the 91 most commonly occurring pollutants in drinking water.

There are many pollutants not regulated in treated drinking water —including pharmaceuticals, personal care products and some pesticides used in Oregon. These "emerging contaminants" can be broadly defined as any synthetic or naturally occurring chemical or any microorganism that is not commonly monitored in the environment but has the potential to enter the environment and cause known or suspected adverse ecological and(or) human health effects. In some cases, release of emerging chemical or microbial contaminants to the environment has likely occurred for a long time, but may not have been recognized until new detection methods were developed. In other cases, synthesis of new chemicals or changes in use and disposal of existing chemicals can create new sources of emerging contaminants.

Through extensive sampling and analysis by the U.S. Geological Survey and others, we know that many pollutants found in Oregon streams cannot be fully removed through standard drinking water treatment technology commonly used by public water systems (Kolpin et al 2002; Blomquist/USGS 2001). This places even more emphasis in reducing or preventing pollutants in source waters. More information is available from USGS website.

In rural areas, household drinking water commonly comes from private wells (or less commonly, through surface water intakes). If your water comes from a household well or intake (serving one to three households), it is considered a "private" or "domestic" water supply in Oregon. If you get your water from a private well or intake, you're responsible for its maintenance, testing and operation. DEQ provides some limited information for private well owners and more is available from Oregon Health Authority’s Domestic Well Safety program.

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The Oregon Residential-Landlord Tenant Act (ORS 90.320) requires that all landlords maintain their rental units in a habitable condition, including providing a water supply maintained so as to provide "safe drinking water." If a renter has contaminated drinking water, the landlord is responsible for fixing or replacing the plumbing, or providing another source of safe drinking water. For mobile home parks that supply water to each home, the owner of the park is responsible for providing safe drinking water to the homes.

For more information on your individual rights, contact a private attorney or call "Legal Aid Services of Oregon" (a nonprofit assistance organization) at 1-800-228-6958.

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• Oregon Health Authority Healthy School Facilities (OHA)
  Includes information on Oregon rules for schools related to environmental health and information on addressing lead in school drinking water
• Drinking water in schools and child care facilities (EPA)
  This site provides guidance documents for school officials and child care providers on how to implement voluntary programs and policies to ensure water quality in your facility when you don’t have your own drinking water well or intake. There is also guidance for best management practices for drinking water in a school or child care facility that has their own well and is an official public water system. This site also provides information of reducing lead and bacteria in their facility, how to avoid cross contamination, protect your water source, and water conservation tips. 
• Healthy School Environments (EPA)
  This site includes other health issues in addition to drinking water.
• Drinking Water Activities for Students and Teachers (EPA)
  EPA’s web-site for students and teachers that includes activities, lesson plans and teacher guides addressing drinking water.
• National Groundwater Association:
  Activities, classroom materials, and lesson plans for K-12 educators and students on the subject of groundwater and drinking water.  Includes a link to the Groundwater Foundation Student and Educator page which has additional activities and resources. 
• Keeping it Clean: A Teacher's Guide to Student Involvement in Community Drinking Water Protection. Limited copies are available. To order, please contact Sheree Stewart, DEQ, at 503-229-5413.