What distinguishes hexavalent chromium from total chromium measurements in Fayetteville water?
Government sampling from the Lincoln County Board of Public Utilities #1, serving Fayetteville, Tennessee, shows two relevant measures: chromium-6 (hexavalent chromium, Cr(VI)) and total chromium. Total chromium includes multiple forms—most commonly trivalent chromium (chromium-3) and hexavalent chromium (chromium-6). The difference matters because the health effects and treatment considerations differ between these forms. The EPA data reports chromium-6 detected in all 32 tested samples, with concentrations between 0.03 and 0.85 micrograms per liter (µg/L). In contrast, total chromium was detected above 0.2 µg/L in 9 of 32 samples, with a maximum of 0.9 µg/L. These overlapping but distinct results mean total chromium data cannot alone indicate the level of hexavalent chromium present in your household water.
Why did California adopt a 10 µg/L chromium-6 limit, and what does that mean for homes in Lincoln County?
California set a public health goal and regulatory limit of 10 micrograms per liter (10 parts per billion) for hexavalent chromium based on its risk assessments. This limit guides treatment requirements and public awareness in that state. However, no federal maximum contaminant level currently exists specifically for chromium-6, and Lincoln County's public water system has no recorded health-based violations. The highest chromium-6 measurement reported in Fayetteville water samples (0.85 µg/L) is well below California's threshold. Understanding these different regulatory frameworks helps residents interpret water quality data without assuming a direct safety concern where none is documented.
What are the effects of leaving chromium-6 in water untreated over a long period?
Hexavalent chromium is a chemical form of chromium that can persist in water supplies for years if not addressed. Continuous exposure to elevated levels of chromium-6 in water may raise health questions that require individual water testing to assess risk accurately. While Fayetteville’s system data shows relatively low concentrations, household equipment that cannot keep pace might leave chromium-6 levels inadequately controlled in the home. Over time, this could lead to aesthetic or operational issues, and residents seeking to maintain water quality should consider monitoring and targeted filtration options.
How reliable are chromium-6 figures based on the number of samples taken?
The EPA’s Unregulated Contaminant Monitoring Rule (UCMR3) data for Lincoln County is based on 32 sample results collected between September 2014 and August 2015. While this provides a snapshot of water quality across the system, individual household conditions can vary widely. A limited number of samples means results offer general insight into regional water characteristics but cannot precisely represent every well or tap. Therefore, Fayetteville residents should test their specific water supply to understand their unique chromium-6 levels and treatment needs more precisely.
What was the UCMR3 survey designed to learn, and can it inform choices for one household?
The nationwide UCMR3 survey aimed to identify the presence and approximate levels of unregulated contaminants like chromium-6 in public water systems across the United States. Its purpose was to gather data to help the EPA consider future regulation—not to establish compliance or safety conclusions for individual homes. Because UCMR3 results reflect broad system averages rather than individual sites, a household experiencing chromium-6 challenges should use these findings as a context rather than a definitive report of their own water quality.
How do sources of hexavalent chromium vary, and what does this mean for Lincoln County water?
Hexavalent chromium can enter water through industrial activities such as metal plating or through natural geogenic sources in arid, alkaline aquifers. Fayetteville’s water supply comes from surface water, which may have different chromium-6 dynamics than groundwater systems influenced by natural mineral deposits. Understanding that chromium-6 levels result from complex environmental and industrial factors highlights why ongoing monitoring and tailored treatment options matter for households where existing equipment struggles to keep up with chromium-6 presence.
To manage chromium-6 concentrations effectively where household equipment shows limitations, the C-Series Chromium-6 Filter ships ready to configure for home water treatment. Its technology is designed specifically to address chromium-6 demands measured by testing your water, helping households maintain consistent water quality amid the region’s chromium-6 characteristics.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-08-03. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Lincoln County Board of Public Utilities #1 (TN0000764), TN: 64 results across 2 listed contaminants, 41 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L