If you wonder how chromium-6 changes between your well, the city water main, and your tap
Chromium-6, or hexavalent chromium (Cr(VI)), is a form of chromium found dissolved in water. In Houston County, including Dothan, the public water supply is drawn from groundwater sources that have been monitored for chromium-6. The oxidation state of chromium can shift through treatment and distribution, but federal records (EPA SDWIS) show chromium-6 detections up to 2.4 micrograms per liter (µg/L or parts per billion, ppb) in the system, without health-based violations reported. However, between the groundwater source, water treatment, and household taps, factors such as natural chemical reactions and interaction with pipe materials can alter chromium’s form and concentration.
If you want to know why California established a 10 µg/L chromium-6 guideline and what it means for Houston County water
California adopted a public health goal of 10 µg/L for chromium-6 based on state-specific risk assessments, which is not a federal enforceable standard. Houston County’s federal monitoring results for chromium-6 in city water report detections below this level, with a maximum of 2.4 µg/L recorded during EPA’s Unregulated Contaminant Monitoring Rule sampling from 2013 to 2015. This means while California’s guideline serves as a reference point about chromium-6 levels potentially related to health concerns, it does not apply as a compliance limit in Alabama’s public water system. Residents can consider this guideline when assessing their own water quality, but their water system’s record has no federal health-based violation or maximum contaminant level exceedance for chromium-6 or total chromium.
If you consider how your household plumbing materials and age may affect chromium(VI) presence separate from source water
The water that arrives at your home can be influenced by the types of pipes and plumbing components used inside your residence. Older plumbing or certain metals may interact with chromium compounds and other trace elements, potentially changing chromium’s chemical form or concentration in tap water. This means chromium-6 levels measured in the water system do not directly equate to what comes from your tap. Testing your household water specifically is the only way to determine chromium-6 concentrations inside your home rather than relying on system-wide monitoring results.
If you look at how chromium-6 levels fluctuate over seasons or multiple years in Houston County’s water record
Federal sampling under UCMR3 between April 2014 and February 2015 detected chromium-6 in 11 of 66 samples within the City of Dothan Utilities system. The median detected concentration was 0.21 µg/L, with the highest measurement at 2.4 µg/L. These data show chromium-6 presence can vary over time and sampling events but stayed well below federal total chromium limits and without health-based violations. Seasonal changes in groundwater chemistry and water system operations may contribute to this variation. Longer-term or repeated sampling could reveal additional trends particular to this water source.
If you want to compare Houston County’s chromium-6 data with neighboring counties without overinterpreting it
Comparing chromium-6 measurements between water systems or counties requires attention to sampling methods, dates, water sources, and treatment configurations. Houston County’s public supply draws on groundwater, while nearby counties may use surface water or other sources. Differences in detection frequency and levels might reflect these factors rather than regional contamination. Always consider the scope of monitoring and any federal or state guidelines before drawing conclusions from such comparisons.
What you should not conclude from Houston County chromium-6 data
The presence of chromium-6 detections in the city water system does not mean your household water is unsafe or exceeds recommended levels. No health-based violations have been recorded for chromium-6 or total chromium in Dothan’s water system according to federal EPA records. Your own water’s chromium-6 concentration can only be known through specific testing of your tap water. If your current water treatment setup is challenged by chromium-6, solutions like the C-Series Chromium-6 Filter ship ready to configure, providing a documented option to better manage household chromium(VI) levels without implying a fixed reduction capability or product figure here.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2015-02-03. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for City of Dothan Utilities (AL0000681), AL: 132 results across 2 listed contaminants, 21 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L