The public water system serving Casper, Natrona County, WY, reports no detections of perchlorate above the federal reporting level in its sampling conducted between 2002 and 2003. This information comes from the EPA’s Unregulated Contaminant Monitoring Rule for the CENTRAL WY REG WATER SYS JPB system, which serves a small population using surface water sources. Although no perchlorate above the reporting threshold was found, households deciding on water treatment should know how to proceed if perchlorate were present in their own water supply.
If you need to reduce perchlorate in your household water
Perchlorate is a chemical that can interfere with thyroid function by affecting iodine uptake. When perchlorate is present at levels of concern, specialized water treatment systems can reduce this constituent effectively. The Pentair Perchlorate Filter uses targeted filtration technology designed to remove perchlorate ions from drinking water, improving water quality where perchlorate is detected above desired levels. This technology ships ready to configure for household water systems, providing an option for those who have confirmed perchlorate presence through laboratory testing.
If you are confusing perchlorate with other water contaminants
Perchlorate should be distinguished from other commonly discussed water constituents such as nitrates or chlorides. Unlike nitrates, which are regulated with a health-based maximum contaminant level, perchlorate currently lacks a federal MCL. Chloride and total dissolved solids affect taste and corrosion but are unrelated to perchlorate’s specific chemical effects. Understanding these differences helps ensure water treatment choices address the right concern without unnecessary or mismatched approaches.
If you rely on public water system records but want to verify your household water
The EPA sampling cited covers the entire public water system’s source water and treatment as delivered to the distribution network, not individual households. Local sampling does not measure water quality within your home’s plumbing nor variations that may occur there. To establish your own water’s perchlorate level, a laboratory test of a water sample from your tap is recommended. This direct measurement is critical to decide if a perchlorate treatment system is necessary.
If you want to know how household water changes after using the Pentair Perchlorate Filter
Once a Pentair Perchlorate Filter is in place and operating, treated water should show a significant reduction in perchlorate concentration at the tap. This means water used for drinking and cooking is less likely to contain perchlorate ions, addressing household concerns about this contaminant. Regular testing confirms the system’s effectiveness over time, ensuring sustained improvement in water quality specific to perchlorate removal.
If you are interpreting what 'detected', 'median', and 'range' mean in the EPA sampling record
In the EPA’s public water system record for Casper, perchlorate was not detected above the reporting level of 4.0 micrograms per liter in any of the eight samples collected from 2002 to 2003. 'Detected' means the instrument measured perchlorate at or above that threshold, which did not occur here. The term 'median' would describe the middle value of results, but in this case, all results were below detection limits. The 'range' covers the spread of measurements across samples, which here is effectively below the reporting limit. Knowing these terms helps interpret the data without assuming any water safety issue.
If you consider how the water source and sampling parameters affect perchlorate expectations
The public system draws from surface water sources, which can have different perchlorate levels than groundwater or private wells. Depth of water source and sampling location influence measured concentrations, as perchlorate may move differently through soil and water columns. Households using private wells or alternate sources should obtain sampling specific to their situation because general regional data cannot determine individual water conditions.
What not to conclude from public perchlorate data in Natrona County
Residents should not conclude that their own household water contains no perchlorate based solely on public water system records. These records represent area-wide sampling and do not replace individual testing. Additionally, the absence of perchlorate detections at reporting levels in these samples does not imply a health violation or safety concern for the public system, as none are on record. The data support informed decisions but must be complemented with personal water analysis when selecting water treatment solutions.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2003-09-25. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR1 monitoring (2001-2005) for CENTRAL WY REG WATER SYS JPB (WY5600009), WY: 8 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level

