Reviewing Chromium Measurements: What Your Lab Report Shows
Chromium-6 concentrations are listed in micrograms per liter (µg/L), the same as parts per billion (ppb).
A lab test for chromium-6 reports individual detected values or notes results below reporting levels, never legal limits since none exist federally for chromium-6.
Total chromium results combine all chromium forms but do not specify chromium-6 levels.
Trivalent Versus Hexavalent Chromium: Different Forms, Different Questions
Total chromium measurements cannot distinguish trivalent chromium (chromium-3) from hexavalent chromium (chromium-6).
Chromium-6 is a specific form noted in public water system surveys, requiring targeted testing to identify.
Understanding this difference is essential since only chromium-6 concentrations inform concerns related to chromium(VI).
The UCMR3 Survey: Insights and Limitations for Homeowners
Kent County Water Authority's data from 2013 to 2015 showed chromium-6 detected in some water samples at levels up to 0.11 µg/L, below any federal safety thresholds.
This monitoring occurred at the system level serving over 94,000 people but does not represent any individual household's water.
Because the survey is not a compliance or safety test, homeowners should not assume their water reflects these average values.
Understanding Certified Laboratory Reports for Chromium(VI)
A certified lab report will include chromium-6 results with clear units and detection limits, enabling homeowners to see their own water’s specific status.
Such testing distinguishes hexavalent chromium from total chromium, providing precise information for decision-making.
Interpreting these results helps decide if treatment technologies should be considered.
Sources of Hexavalent Chromium: Natural Versus Industrial Origins
Hexavalent chromium may appear due to natural geology such as arid, alkaline aquifers, or from industrial processes like plating; Kent County supplies surface water from varied sources.
Understanding source origin is important but requires detailed local water analysis beyond system-level data.
This knowledge helps frame treatment options appropriate to the water’s chromium-6 profile.
Potential Effects of Extended Chromium-6 Exposure at Low Levels
Long-term exposure to chromium-6 at elevated levels can have health implications, but no federal maximum contaminant level currently exists for this form.
The Kent County Water Authority has no recorded health-based violations for chromium-6, indicating regulatory compliance at the system scale.
Home testing and treatment considerations focus on precaution and personal preference rather than mandatory action.
Information to Gather Before Evaluating Treatment Options
Obtain a recent certified laboratory test report specifically detailing chromium-6 concentration in your household water.
Document the water source type and any known local conditions influencing chromium levels.
Compare your results against public system data and consult trusted resources to understand potential treatment technologies.
Choosing Technology for Household Chromium-6 Concerns
One option designed to address chromium(VI) is the C-Series Chromium-6 Filter, which ships ready to configure for point-of-entry use.
This technology targets hexavalent chromium effectively based on documented specifications and can be considered alongside other technical approaches.
Evaluating this option requires matching your water’s test results and household needs with the product’s capabilities.
Summary of Kent County Chromium-6 Water Data
The Kent County Water Authority system serves over 94,000 people with surface water sources and has recorded chromium-6 detections up to 0.11 micrograms per liter in a federal survey, with no health-based violations on record. These system-wide results do not represent any specific home’s water quality. Detailed, certified testing is needed to understand individual household chromium-6 levels. For more information, visit the EPA public water system database.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-02-11. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Kent County Water Authority (RI1559511), RI: 40 results across 2 listed contaminants, 13 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L