Woodburn Water Hardness & Quality Report (2026)

Woodburn, Oregon, in Marion County in the northern Willamette Valley, receives its municipal water from the Woodburn Water Division, which draws from the North Santiam River system — either directly or through the Willamette Valley Water Coalition regional supply network. The North Santiam originates high in the Oregon Cascades at Detroit Lake, a major U.S. Army Corps reservoir, and flows northwest through the Cascade foothills to the Willamette Valley floor. The North Santiam provides high-quality, naturally pure water to multiple Marion County communities including Woodburn's diverse agricultural and residential population.

The very low 30.5 mg/L hardness reflects the North Santiam's volcanic source geology. The Oregon Cascades above Detroit Lake are underlain by Quaternary basalt and andesite — volcanic rocks of the High Cascades that are siliceous and essentially carbonate-free. Snowmelt and rainfall percolating through and running over these volcanic formations picks up minimal calcium or magnesium, producing some of the softest water in the Pacific Northwest. The TDS of only 53.1 mg/L confirms the exceptionally low overall dissolved mineral content arriving in Woodburn's supply.

At 30.5 mg/L, Woodburn has very soft water — there is essentially zero scale formation on appliances, soap lathers abundantly, and glassware emerges spotless from the dishwasher. Kettles and water heaters can operate indefinitely without descaling under normal use. The primary consideration is soft water's corrosive tendency — it can leach trace metals from copper plumbing, particularly in homes with older pipe materials. The PFAS level of only 1.4 ppt is one of the lowest in this entire dataset, making Woodburn's water quality profile genuinely exceptional for any western Oregon community.