Water Quality in Oregon: Complete Guide
Everything homeowners need to know about Oregon tap water - hardness, contaminants, treatment options, and costs.
Quick summary: Oregon has an average water hardness of 25 PPM across 48 cities. 0% of cities have hard water above 120 PPM. PFAS contamination is detected above EPA limits in at least one city. Most households do not need water softening equipment.
Water Hardness Across Oregon
Oregon's water hardness ranges from 12 PPM in Astoria to 50 PPM in Hermiston, with a statewide average of 25 PPM. This makes Oregon one of the softer-water states. The national average is approximately 120 PPM.
Most Oregon cities use surface water (rivers, lakes, reservoirs), which generally has lower mineral content than groundwater.
Contaminants of Concern in Oregon
PFAS: The average PFAS level across Oregon cities is 4.0 ppt. Springfield has the highest detected PFAS at 50.2 ppt, above the EPA maximum contaminant level of 4 ppt. Residents should consider a reverse osmosis or NSF P473-certified filter for drinking water.
Lead: Lead contamination comes from plumbing infrastructure, not the water source. Oregon homes built before 1986 are at higher risk due to lead solder. 7 cities show lead levels above 5 ppb.
Do You Need a Water Softener in Oregon?
For most Oregon residents, no. Only 0% of cities have hard water above 120 PPM. However, individual situations vary - check your city page for specific data.
Impact of Hard Water in Oregon
With an average hardness of 25 PPM, most Oregon households do not face significant hard water impact. However, homes with hardness above 120 PPM should evaluate treatment options.