An official website of the State of Oregon
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People in Oregon are only required to test their well water when selling a property with a well. Visit the Real Estate Transaction Page for more information on testing and reporting.
If you are building a new well, other regulations apply.
This most likely means that surface contamination has found its
way into the well and disease-causing organisms may be in your water. You may
need to adjust the environment around your wellhead. You may also need to
inspect your well system for damage or malfunctions. You may also install a
If initial test results are above 8ppb, you should retest. If
high concentrations continue; a treatment system should be installed.
Continue regular testing with a treatment system. Testing should
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