Is my household water corrosive? The regional data from Morrow County, Oregon's aquifer 122CBRV show a pH range that helps frame this question but does not answer it definitively for your own well. Local government groundwater sampling provides a useful background to guide your decisions when selecting water treatment equipment to protect your pipes.
How Sample Depth and Source Type Influence What You Should Expect
Depth of sampled wells reflects local aquifer conditions
US Geological Survey wells sampled in this area were consistently 80 feet deep. This depth level helps characterize the regional groundwater quality but individual wells can vary based on drilling depth and local geology.
Groundwater from aquifer 122CBRV represents a broad regional source
This aquifer’s water typically shows moderate pH values, which affects corrosion potential. Surface water or shallower wells may show different characteristics not captured by this sampling.
Interpreting Regional Median and Range of pH as a Homeowner
Median pH of 7.6 indicates generally neutral to slightly basic water
A median pH of 7.6 standard units means half the sampled measurements were above this and half below, suggesting no widespread acidic water in this regional aquifer.
Range from 7.2 to 8.2 standard units stays within EPA’s secondary pH standard
All 44 measurements fell between 7.2 and 8.2, within the 6.5 to 8.5 EPA secondary range. This range means the water is not acidic enough in these samples to typically cause corrosion-related damage.
What to Write Down Before Seeking Treatment Advice
Your specific water pH measurement
Because regional sampling does not specify your well’s water, testing your own water pH is essential to determine corrosivity.
Depth and type of your well
Note well depth and source to compare with regional data and better understand your water quality context.
Any visible or taste signs of corrosion
Document plumbing issues such as staining, leaking, or metallic taste to guide treatment selection.
Understanding Terms 'Detected,' 'Median,' and 'Range' in This Sampling Record
'Detected' means the pH was measurable in all samples
Each of the 44 samples showed a defined pH value; none were below detection limits.
'Median' provides a midpoint, not a maximum or minimum
The median divides the data set so half the samples have pH above 7.6 and half below, giving an overall sense of typical groundwater.
'Range' shows the spread of recorded pH values
The range from 7.2 to 8.2 reflects variability but all remain within a noncorrosive zone by EPA aesthetic standards.
Why EPA’s Secondary Standard for pH Is Not a Health-Based Limit
EPA’s pH standard addresses aesthetics and corrosion potential
The 6.5 to 8.5 pH range guides water taste, color, and pipe integrity but does not indicate safety or health risk.
Water outside this range may affect plumbing materials, not health
Low pH can promote corrosion and pipe damage, but pH itself is not a contaminant regulated for health.
Water treatment equipment for corrosivity focuses on protecting pipes
Choosing proper equipment like the C-Series Corrosive Water Damaging Pipes Filter depends on your water’s exact pH and corrosion signs.
This summary reflects 44 USGS groundwater samples from wells 80 feet deep in Morrow County’s aquifer 122CBRV, collected between 2014 and 2019. For detailed data, visit the official USGS site.
Where this information comes from
Source: USGS groundwater sampling. Sampled 2019-06-05. These figures describe groundwater sampled in this area. They are not a test of any individual private well - only a test of that well can establish its own water.
On record: U.S. Geological Survey sampling of pH in the 122CBRV aquifer (Morrow County): 44 results from 1 wells, median 7.6 standard units, range 7.2-8.2 standard units; EPA secondary standard for pH is 6.5-8.5 (aesthetic/corrosivity, not health-based); 0 of 44 sampled results fell below 6.5