Government sampling of the public water system serving Marion County, Oregon, found no perchlorate detections above the reporting level during federal monitoring from 2001 to 2005.
Sample Depth, Source, and Expected Perchlorate Levels
Public System's Groundwater Source
The Keizer city water system in Marion County obtains its supply from groundwater. Groundwater sources can vary in depth and local geology, influencing perchlorate presence.
Impact of Sampling Depth on Results
Perchlorate concentrations may differ substantially with sampling depth; deep wells might have different contaminant profiles than shallow ones. Public system sampling represents aggregated source data, not specific depths in household wells.
Public System Records Versus Private Well Testing
What Public Records Establish
The Keizer water system's record shows zero perchlorate detections above the 4.0 µg/L reporting level in 30 samples taken over several months, indicating no perchlorate measurable at those times and locations for the system.
Limits of Public System Data for Individual Homes
These findings do not replace testing of your own water source. Private wells may differ in perchlorate levels due to aquifer variation or proximity to contamination sources.
Comparing Marion County Records to Neighboring Areas
Why Neighboring Counties Are Reference Points
Nearby counties may show differing perchlorate detection frequencies. Such comparisons provide regional context but cannot predict your household water quality.
Avoid Overreading Regional Data
Do not assume that a lack of detections in Marion means your well is free from perchlorate or that nearby detections imply your water is affected.
The Influence of Plumbing Materials and Age
Separation from Source Water Considerations
Plumbing materials and system age affect water quality aspects like corrosion or taste but do not influence perchlorate levels, which originate from the water source.
Assessing Plumbing Effects Separately
Address any water discoloration or metallic taste as different issues distinct from perchlorate concerns evaluated at the source.
Treated Water Quality with Autotrol Perchlorate Filter
How the Filter Works
The Autotrol Perchlorate Filter is designed to reduce perchlorate concentrations in household water, providing an added layer of protection when perchlorate is detected or suspected.
Water Quality Changes After Filtration
Water treated by this system typically shows lowered perchlorate levels at the tap, although this depends on initial concentrations and system configuration. The filter ships ready to configure for direct purchase.
Final Note: Marion County’s public water system data shows no perchlorate detections above the reporting level during the assessment period, which does not confirm the absence of perchlorate in individual household sources. Testing your own water is necessary to know your specific conditions. This area data should not be interpreted as a guarantee of your water’s perchlorate status.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2002-07-09. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR1 monitoring (2001-2005) for KEIZER, CITY OF (OR4100744), OR: 30 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level
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