Myth: Local Water Is Routinely Tested Across Many Wells Every Year
The official perchlorate data for Thurston County comes from the Lacey Water Department's public water system record. This record includes results from 26 samples collected between 2002 and 2003 under the EPA’s Unregulated Contaminant Monitoring Rule. These samples represent groundwater sources feeding public taps but are not from every well or tap in the county. The relatively small number of samples means the data provides an overview of the system rather than exhaustive testing of all residential water sources.
Myth: Perchlorate Levels Left Untreated Pose Immediate or Certain Harm
Perchlorate, a chemical sometimes found in groundwater, can interfere with thyroid function in high enough amounts. However, the Lacey Water Department's record shows no health-based violations for perchlorate or other contaminants. While chronic exposure to elevated perchlorate is a concern, the federal system has not established maximum contaminant levels (MCLs) for it, reflecting ongoing evaluation. Leaving perchlorate untreated does not inherently mean immediate health risks but may be a factor in long-term household water quality management.
Myth: Testing Personal Water Is Unnecessary if the Public System Has Data
The data from the public water system gives a snapshot but cannot determine perchlorate levels in individual homes. Water quality can vary within a distribution system or between private wells and public sources. Homeowners concerned about perchlorate should consider testing their own water independently through certified laboratories. This step is essential to verify whether the perchlorate concentration in their specific supply aligns with or differs from public system data.
Myth: Commercial or Industrial Water Users Have the Same Testing Requirements as Households
Commercial and industrial operators often face additional regulatory scrutiny, monitoring, and treatment requirements due to larger scale water use or discharge potential. Households do not usually have these obligations but may benefit from similar water quality assessments to ensure safety and performance of existing treatment equipment. This distinction affects what tests and questions are relevant when evaluating perchlorate presence and mitigation options.
Myth: Any Treatment Recommendation Can Be Made Without Knowing Current Water Data
Before choosing a treatment approach for perchlorate, it is crucial for homeowners to document specific water quality information. Relevant details include the source (public or private well), any prior test results, symptoms of treatment system strain, and water usage patterns. These facts help determine whether a system like the Pentair Perchlorate Filter, which ships ready to configure for household use, can effectively support the household’s needs and complement existing equipment.
Conclusion: The Definitive Step Is to Test Household Water Directly
The single most important action is to obtain laboratory analysis of your household water specifically for perchlorate concentration. A certified test will clarify whether perchlorate is present at levels consistent with local public water data or requiring targeted treatment. Based on such results, options including the Pentair Perchlorate Filter can be confidently considered to maintain water quality and system performance in Thurston County homes.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2003-01-23. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR1 monitoring (2001-2005) for LACEY WATER DEPARTMENT (WA5343500), WA: 26 results across 1 listed contaminants, 2 detections above the reporting level; no federal MCL
- ✓ 90-Day Money-BackNo restocking fees — return within 90 days.
- ✓ Manufacturer WarrantyGenuine Fleck · Pentair · VIQUA equipment.
- ✓ Free Expert SizingTalk to a specialist and buy the right system the first time.