Dozens of rural households north of Prineville are staring down a drinking water scare after state testing turned up contamination in nearly 60 private wells. A new draft health consultation from the Oregon Health Authority says elevated manganese and other metals, some nitrates and multiple detections of bacterial coliform are showing up in the neighborhood’s groundwater.
The draft report lays out community-level health risks, options for treatment and next steps for well users. It is now open for written public comment.
What State Testers Found
According to the Oregon Health Authority, the draft consultation reviews data from two rounds of state-sponsored sampling and includes individualized health interpretations for every participating household.
OHA says it has already sent results to those households and offered one-on-one appointments with toxicologists to walk people through what the numbers mean. The agency is taking written comments on the draft at [email protected] through Aug. 17, 2026.
How Bad The Numbers Look
As detailed by the Department of Environmental Quality, environmental firm Maul Foster & Alongi pulled 55 samples in fall 2024 and 58 in spring 2025, screening each well for 43 different analytes.
Roughly half the sampled wells topped the EPA secondary standard for manganese, which is about 50 micrograms per liter, with spring readings climbing as high as 464 micrograms per liter. Several wells also showed arsenic or vanadium at levels state officials flagged as concerning.
Nitrate came in just above the primary federal maximum contaminant level in nine to ten wells, and total coliform bacteria showed up in 13 wells during the first sampling round and in four wells during the second.
DEQ points out that private domestic wells are not regulated the way public water systems are, which means decisions about testing, treatment and long-term fixes fall largely on individual well owners.
Life On Bottled Water
Local homeowners told reporters they have been hauling bottled water and steering clear of tap water after repeated contamination hits, turning daily routines into logistical puzzles. Some residents described stained laundry and skin irritation when they bathed in their well water.
As reported by OPB, OHA toxicologist David Farrer did not mince words about some of the results, saying, “I definitely would not recommend drinking it,” while noting that bathing risks depend on the exact contaminant levels in each well. The accounts underscore how quickly life gets complicated when your private water supply is no longer a sure thing.
Questions Swirl Around Nearby Mine
State agencies are still trying to determine whether nearby mining operations are playing any role in the groundwater problems. According to DEQ, regulators have ordered Knife River Corporation to carry out a groundwater investigation at the Woodward mine and have conditionally signed off on a sampling plan that will proceed under agency oversight.
Agency documents and press coverage say significantly more monitoring and stable funding will be needed to pinpoint contaminant sources and decide on long-term responses for the area.
What Well Owners Can Do Now
OHA recommends that private well owners test their water every one to three years and offers step-by-step guidance on using accredited labs, collecting samples and choosing treatment systems.
According to the Oregon Health Authority, households that participated in the state sampling have their individual lab reports in hand and can request consultations with OHA toxicologists to interpret the findings and discuss possible remediation options. The agency’s Crook County webpage lists additional resources on filtration, certified labs and practical next steps for affected residents.
The draft health consultation remains open for public comment until Aug. 17, 2026. Written feedback and technical questions can be sent to [email protected]. Officials say the OHA consultation, together with DEQ’s sampling results, will shape what further monitoring, funding and cleanup efforts may be needed for Crook County well users.
