Water Hardness in Oregon Cities

Water Hardness in Oregon Cities

Water hardness is characterized by the concentration of dissolved calcium and magnesium in water. This attribute can vary throughout Oregon, with different regions of the state exhibiting varying levels of water hardness due to differences in geology and water sources.

In Oregon, water hardness levels can range from soft to hard, depending on the specific location within the state. Coastal areas of Oregon often have softer water due to the influence of rainwater and runoff from less mineralized soils. In contrast, areas in eastern Oregon may experience harder water because of the geological formations, such as sedimentary rocks, which can leach higher levels of minerals into the water supply.

Specific water hardness values in Oregon’s cities can provide insight into the local water quality. While these values can change, it’s not uncommon to find that some communities within the state have moderately hard to hard water. The hardness of water in Oregon can affect taste, the efficiency of soaps and detergents, and may have implications for home appliances that use water.

The water hardness levels in the state of Oregon show considerable variation across different cities, with measurements given in parts per million (ppm) and grains per gallon (gpg). Cities such as Keizer, Woodburn, and Newberg have high hardness levels of up to 107 ppm, 6.25 gpg. In contrast, Beaverton and Portland show significantly lower levels as low as 2.3 ppm, 0.12 gpg. Meanwhile, cities like Corvallis and Hillsboro have higher concentrations of hardness at 29.3ppm, 1.69 gpg, and 38.0ppm, 2.22 gpg. However, several cities, including Gresham, Medford, Springfield, and others did not have available data.

City Hardness ppm (mg/L) Hardness gpg Information Source Notes
Portland 5.5 0.3 Link Used the Bull Run number which is listed as the main source. Median of range.
Salem 17.0 1.0 Link
Eugene 16.0 0.9 Link From Testing Results on this page, not annual CCR
Gresham n/a n/a Link
Hillsboro 38.0 2.2 Link Used In-Town Water System number
Bend 21.4 1.3 Link
Beaverton 2.3 0.1 Link Used the “typical range” listed on report
Medford n/a n/a Link
Springfield n/a n/a Link
Corvallis 29.3 1.7 Link
Albany n/a n/a Link
Tigard 5.5 0.3 Link
Lake Oswego 25.0 1.5 Link
Grants Pass 45.4 2.7 Link
Keizer 107.0 6.3 Link
Oregon City 32.0 1.9 Link
Redmond n/a n/a Link
McMinnville 26.0 1.5 Link
Tualatin 5.5 0.3 Link Buys from Portland
West Linn n/a n/a Link
Wilsonville n/a n/a Link
Forest Grove n/a n/a Link
Woodburn 94.0 5.5 Link
Happy Valley n/a n/a Link
Newberg 84.0 4.9 Link
Roseburg n/a n/a Link
Klamath Falls 86.0 5.0 Link Average of 7 listed wells
Ashland n/a n/a Link
Milwaukie 80.0 4.7 Link Took midpoint of listed range
Sherwood n/a n/a Link
Hermiston n/a n/a Link
Central Point n/a n/a Link Receives from Medford
Lebanon n/a n/a Link
Canby n/a n/a Link
Dallas 30.0 1.8 Link Only mention of hardness is that the water is “very soft” with no qualifier, so I took the median of the USGS soft range.
Pendleton n/a n/a Link
The Dalles n/a n/a Link
Troutdale n/a n/a Link
Coos Bay n/a n/a Link
St. Helens n/a n/a Link
Cornelius 38.0 2.2 Link Purchases from Hillsboro
La Grande n/a n/a Link
Sandy n/a n/a Link Purchases between 33-50% of water from Portland, sources the rest from a spring and a creek. Does not report hardness number for the latter two.
Gladstone n/a n/a Link
Ontario n/a n/a Link
Prineville n/a n/a Link
Monmouth n/a n/a Link
Fairview 90.0 5.3 Link Report says moderate hardness, doesn’t quantify, so I took median of the USGS defined moderately hard range.
Cottage Grove 9.0 0.5 Link
Silverton n/a n/a Link
Newport n/a n/a Link
Astoria n/a n/a Link
North Bend n/a n/a Link
Molalla n/a n/a Link
Independence n/a n/a Link
Baker City 60.0 3.5 Link
Lincoln City n/a n/a Link
Sweet Home n/a n/a Link
Eagle Point n/a n/a Link Covered by Medford
Florence 19 1.1 Link
Sutherlin n/a n/a Link
Hood River n/a n/a Link
Stayton n/a n/a Link
Scappoose n/a n/a Link
Madras n/a n/a Link
Umatilla n/a n/a Link
Seaside n/a n/a Link Alkalinity only
Milton-Freewater n/a n/a Link
Junction City n/a n/a Link
Brookings n/a n/a Link
Warrenton n/a n/a Link
Talent n/a n/a Link Most recent report on their website is 2018
Creswell n/a n/a Link
Winston n/a n/a Link
Philomath n/a n/a Link
Veneta 16.0 0.9 Link Sources from Eugene
Tillamook 20.0 1.2 Link
King City 5.5 0.3 Link Sources from Tigard
Wood Village n/a n/a Link
Estacada n/a n/a Link
Sheridan n/a n/a Link
Lafayette n/a n/a Link
Reedsport n/a n/a Link
Phoenix n/a n/a Link Sources from Medford
Aumsville n/a n/a Link
Coquille n/a n/a Link
Boardman 90.0 5.3 Link Report lists water as “moderately hard” but doesn’t specifically quantify. Used median of the USGS defined range for the number.
Harrisburg n/a n/a Link Most recent report was 2016
Toledo n/a n/a Link
Myrtle Creek n/a n/a Link
Hubbard n/a n/a Link
North Plains 37.8 2.2 Link
Mount Angel n/a n/a Link
Bandon n/a n/a Link
Jefferson n/a n/a Link
Oakridge n/a n/a Link
Dundee 22.0 1.3 Link
Nyssa n/a n/a Link
Millersburg n/a n/a Link Shares control of water treatment plant with Albany
Shady Cove n/a n/a Link
Top 100 Oregon cities by population and their reported water hardness
ppm = Parts Per Million
mg/L = Milligrams Per Liter
gpg = Grains Per Gallon

Hard water can cause issues such as mineral buildup in plumbing and appliances, reduce the efficacy of soaps and detergents, and affect the taste of the water. A tried and true solution is the use of a water softener. A water softener, like the ones from DROP, could be a worthwhile investment.

These devices work by replacing the calcium and magnesium ions that cause hardness with sodium ions, resulting in softer water. With innovative features, easy installation, and efficient operation, DROP smart water softeners provide a solution to hard water issues, extending the lifespan of appliances, improving water taste, enhancing soap effectiveness, reducing scale build-up, and increasing the overall water efficiency in your home.

Back to blog