Roseburg Water Hardness & Quality Report (2026)

Roseburg, Oregon, in Douglas County in the Umpqua River valley — the Douglas County seat, a southern Oregon timber and outdoor recreation center at the junction of the South Umpqua and North Umpqua rivers — receives its municipal water from the City of Roseburg Water Systems Division, which draws from the North Umpqua River or local watershed reservoir impoundments on the Cascade western slope. The North Umpqua provides one of Oregon's most reliable and high-quality mountain river water supplies.

The very soft 51 mg/L hardness and low TDS of 101.8 mg/L reflect the North Umpqua's exceptional source water quality from the Oregon Cascades. The North Umpqua River originates in the High Cascades volcanic terrain of central Oregon — draining Pleistocene and Holocene basaltic volcanic rocks from the High Cascade lava plateau (Diamond Lake watershed, Cascade Range cinder cones) and flowing through the Western Cascade Range (Eocene-Oligocene andesitic and basaltic volcanic formations — the Little Butte Volcanic Series and related units). These volcanic terrains are almost entirely free of carbonate minerals, producing characteristically soft, mineral-poor water. The North Umpqua's exceptional clarity and purity are also maintained by the relatively pristine, forested Umpqua National Forest watershed.

At 51 mg/L, Roseburg's water is very soft — excellent for household appliances and all uses. Scale forms slowly over many months, soap lathers generously, and the dishwasher produces spotless results. Annual descaling of heating appliances is adequate. The PFAS level of 1.8 ppt is among the very best in the entire western states dataset — the North Umpqua's protected Cascade Mountain watershed, the largely undeveloped upper Umpqua National Forest catchment, and the minimal industrial footprint in the upper watershed produce one of the cleanest PFAS readings in the Oregon water supply portfolio.