Interpreting Detected, Median, and Range in Government Sampling Records
The Henderson Municipal Water & Sewer system, serving over 31,000 residents in Henderson County, KY, has been monitored under EPA’s Unregulated Contaminant Monitoring Rule (UCMR1) between February 2001 and October 2003. The term 'detected' in these records means that the sampling instruments found perchlorate at or above the minimum reporting level of 4.0 micrograms per liter (µg/L) during analysis. For this system, none of the 12 samples taken detected perchlorate above this reporting level. The median and range values are statistical summaries used to describe concentrations across samples. Since no perchlorate was detected above the reporting level, the median and range for perchlorate concentration in these records effectively indicate absence or levels below the instrument’s detection threshold. These findings confirm that perchlorate, if present, was measured only at very low or undetectable concentrations during that period, but do not guarantee your household's water contains no perchlorate without specific testing.
Influence of Water Source and Sampling Depth on Expected Perchlorate Levels
The Henderson system uses surface water sources, which tend to have different contaminant profiles compared to groundwater wells. Surface water can be affected by runoff or atmospheric deposition, factors that may influence perchlorate presence. Sample depth and source type, such as shallow or deep wells versus surface reservoirs, contribute to variability in contaminant concentrations. Because this system’s data derives from surface water samples, households relying on private wells should note that local data does not reflect their well conditions directly. Individual water testing is required to confirm perchlorate levels in private water supplies.
Additional Considerations for Commercial and Industrial Water Users
While this page addresses household water users, commercial and industrial operators often face higher water demand and specific regulatory compliance concerns. They may require detailed contaminant profiling, flow capacity assessments, and customized treatment planning. Households typically focus on steady daily usage and select equipment based on reliability for family needs. Commercial inquiries often include the impact of perchlorate on production processes or regulatory reporting beyond household health standards.
Seasonal and Multi-Year Variation in Perchlorate Monitoring
The Henderson data covers a sampling timeframe from early 2001 to late 2003. This span includes seasonal changes that can affect perchlorate presence due to precipitation patterns, runoff variability, and source water conditions. However, no detected perchlorate above reporting levels was recorded throughout this period. Long-term fluctuations beyond this timeframe are possible but not reflected in this record. Ongoing monitoring or recent testing would be necessary to assess current conditions. Variations within a year or between years emphasize the importance of periodic testing rather than reliance on historical area data alone.
Preparing to Seek Perchlorate Treatment Information
Before exploring treatment options, households should document any recent water quality test results specific to their home, focusing on perchlorate measurements if available. Knowing water source type (well or municipal), household water usage patterns, and any existing treatment equipment details will help in evaluating solutions. The C-Series Perchlorate Filter system ships ready to configure and is designed to address perchlorate removal for households whose current equipment cannot keep up with demand or target contaminant levels. Sharing precise household water data when consulting experts ensures treatment recommendations align with your unique water quality and demand.
What Area Data Should Not Lead You to Conclude
While Henderson Municipal Water & Sewer system’s monitoring shows no perchlorate detected above the minimum reporting level during the specified monitoring period and no health-based violations on record, this does not mean your household water is free from perchlorate or any other contaminants. Area data does not reflect individual well or home plumbing conditions and cannot substitute for direct water testing at your specific location. Additionally, the absence of detections above reporting levels in the system’s sampling does not imply perchlorate is absent; it means the levels were below the instrument’s threshold during sampling. For households whose current treatment equipment struggles to meet perchlorate reduction needs, testing your own water is essential to determine the best response.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2003-10-20. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR1 monitoring (2001-2005) for HENDERSON MUNICIPAL WATER & SEWER (KY0510188), KY: 12 results across 1 listed contaminants, 0 detections above the reporting level; nothing detected above the method reporting level