Fleck Chromium-6 Filter

Buy Now

View full details

Is Total Chromium Enough to Know About Chromium-6 in Water?

Some people think measuring total chromium alone can indicate if chromium-6 (hexavalent chromium, Cr(VI)) is present or at problematic levels in their water. However, total chromium includes all forms, including trivalent chromium (Cr(III)), which behaves differently and is not the same as hexavalent chromium. Because total chromium results do not specify chromium-6 levels, they cannot answer questions about chromium-6 specifically. Data for the City of Laramie public water system separately reports chromium and chromium-6, showing that chromium-6 was detected in 21 out of 26 samples with a median concentration of 0.31 micrograms per liter (µg/L) or parts per billion (ppb), while total chromium detections vary and may not reflect hexavalent chromium presence accurately.

Why Did California Set a 10 µg/L Limit for Chromium-6, and What Does That Mean for Albany Households?

California established a public health goal of 10 micrograms per liter (µg/L) or parts per billion (ppb) for chromium-6 based on its own risk assessments. This state-level guidance aims to manage chromium-6 concentrations in water supplies within California but does not translate into a national enforceable standard. For Albany, Wyoming residents, the City of Laramie's monitoring under EPA's UCMR3 showed the highest chromium-6 measurement at 0.51 µg/L—well below the California guideline. Thus, while Albany water contains detectable chromium-6, it remains far below California's recommended level, illustrating that local water quality contexts differ and require site-specific evaluation.

What Household Signs Might Suggest Chromium-6 Issues, and Which Symptoms Are Unrelated?

Chromium-6 itself is colorless and does not affect taste or odor in water, so household symptoms such as strange taste, smell, or film are unlikely caused by chromium-6. It does not cause staining on fixtures either. Reports of discolored water, cloudiness, or unusual smells more likely stem from other water quality factors, not chromium-6. Because chromium-6 does not create visual or sensory changes, identifying its presence depends on testing rather than observing household symptoms.

How Does Chromium-6 Enter Water in Laramie and Albany County?

The Laramie public water system draws from surface water sources that may contain chromium-6 from natural mineral deposits or historical industrial activities in the region. Environmental processes can release chromium-6 into surface water bodies, which then become part of the treated water supplied. Local government monitoring captures this presence but so far does not record levels exceeding health-based regulatory actions. This regional source explains why the City of Laramie detects chromium-6 in many samples yet remains below thresholds that would trigger health violations.

Which Other Water Issues Are Commonly Mistaken for Chromium-6 Problems?

Chromium-6 is often confused with total chromium or with other metals like iron or manganese, which can cause visible water discoloration and taste changes. Total chromium includes forms not considered as potentially concerning as hexavalent chromium. Iron and manganese typically cause reddish or black staining and tastes, unlike chromium-6. Understanding the distinctions helps in selecting appropriate treatment approaches, as technologies targeting chromium-6 focus on specific chemical properties and would not address problems caused by iron or other elements.

What Is the Best Way to Determine If Chromium-6 Affects Your Home's Water?

The essential step is to obtain a test specifically measuring chromium-6 concentration from your household water supply. Only this result reveals the actual chromium-6 level in your water, which can vary from regional public water system data due to home plumbing and local sources. If chromium-6 is present at levels of concern based on your testing and preferences, then considering a technical filtration option like the Fleck Chromium-6 Filter—which ships ready to configure—may be appropriate. This technology is documented in effectively addressing chromium-6 in residential water systems, offering a clear choice for households seeking to manage chromium-6 specifically.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2013-11-19. 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 Laramie (WY5600029), WY: 52 results across 2 listed contaminants, 37 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L