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Portland Water Bureau

From forest to faucet, we deliver the best drinking water in the world.


1120 SW Fifth Ave, Suite 600, Portland, OR 97204

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Groundwater Protection Program

  • Provide input on proposed updates to groundwater protection requirements Changes to the Columbia South Shore Well Field Wellhead Protection Area Reference Manual are being proposed for 2017.

  • Cycle the Well Field Learn about groundwater protection as part of the annual bicycle ride around the well field.

  • Groundwater Protection Area Is your business or home in the protection area?

  • Technical assistance and training are available. Learn what groundwater protection laws mean for you.

  • Annual Aquifer Adventure attracts family-friendly pirates to the wellfield. Families learn about protecting groundwater while paddling and exploring.

  • Resources are available for businesses to learn about protecting groundwater. Click to view training and reporting forms.

Just like our rivers, our groundwater must be protected. The Cities of Portland, Gresham and Fairview have implemented a groundwater protection program to protect the Columbia South Shore Well Field – a drinking water source for over 800,000 Oregonians.

The goal of the groundwater protection program is to prevent chemical spills that could seep into the ground and pollute our drinking water. Businesses within the wellhead protection area boundary are subject to regulation if they use certain types and quantities of chemicals. Regulations focus on spill containment, prevention and best management practices. Pollution prevention is a cost-effective way to protect our groundwater resource and requires the cooperation of everyone living and working in the protection area.

City Policy

Resolution No. 36156, effective July 2, 2003.

FAQs about Groundwater Protection

Who and what is regulated, chemical thresholds, protection area boundary, and more.

State certification

The city's request for certification from ODEQ. Includes Section 4, "Management of Potential Contaminant Sources"

Technical Assistance

Assistance for businesses, residents and agriculture.

The Columbia South Shore Wellfield Wellhead Protection Program Reference Manual

These are the groundwater protection requirements currently in force in the Columbia South Shore Well Field. Includes links to reporting requirements and forms.