This week, you need to decide which class of water treatment equipment best suits your household’s potential chromium-6 concerns.
Myth: Total chromium measurement fully reflects chromium-6 presence in water
Many believe that total chromium results alone are sufficient to understand chromium-6 levels. However, government sampling in Helena’s public water system distinguishes between total chromium and hexavalent chromium (chromium-6 or chromium(VI)). For example, the EPA's UCMR3 monitoring (2013-2015) shows total chromium detected just once above the reporting level at 0.208 micrograms per liter (µg/L or parts per billion), while chromium-6 was detected 11 times out of 19 samples at a median detected level of 0.063 µg/L and a maximum of 0.123 µg/L. Since total chromium includes multiple chromium species, a low total chromium result does not guarantee low chromium-6. Therefore, knowing chromium-6 specifically is essential for informed treatment decisions.
Myth: Chromium-6 in Helena's water is mainly from industrial pollution
It's easy to assume hexavalent chromium contamination in surface water originates from industrial plating or manufacturing sources. However, Helena's water supply comes from surface water, and the detected chromium-6 is generally geogenic, meaning it naturally occurs in the environment. This contrasts with chromium-6 from industrial sources, which tends to show different geographic patterns and concentrations. Understanding this helps frame expectations about chromium-6 variability and potential treatment requirements in residential settings.
Myth: Household size and usage do not affect treatment needs for chromium-6
The number of residents and water volume demands matter when selecting treatment equipment. A larger household or a property used seasonally will have different flow and capacity requirements. The documented treatment technology, the Pentek Chromium-6 Filter, can be configured to handle varying household water demands. Deciding on the right capacity depends on household size and usage patterns, ensuring effective management of hexavalent chromium at the tap.
Myth: Commercial water users have the same chromium-6 concerns as residential households
Commercial or industrial water users often face stricter regulatory and operational considerations regarding chromium-6. Households, by contrast, focus mainly on safe and aesthetic water quality for drinking and daily use. While commercial operators might require larger-scale treatment, higher flow capacities, and additional safety margins, households can focus on equipment sized and documented specifically for residential volumes and concerns.
Myth: Source type or sample depth has little impact on water chromium-6 levels
Where and how water samples are collected influences chromium-6 measurements significantly. Helena’s surface water supply tends to have different chromium-6 characteristics compared to groundwater or deep wells, where geochemical conditions differ. Depth and source type affect chromium speciation and levels, so understanding these factors helps homeowners anticipate variability and make informed choices about testing and treatment.
Given that general public water system data cannot confirm your household’s specific chromium-6 level, the recommended next step is to order a water test focused exclusively on chromium-6 (hexavalent chromium) concentration at your tap or well. A quantitative measurement in micrograms per liter (µg/L or ppb) will clarify your treatment needs. If chromium-6 is detected at levels consistent with or above regional findings, the Pentek Chromium-6 Filter ships ready to configure for effective chromium-6 management in residential water.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-04-16. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Helena Water System (MT0000241), MT: 38 results across 2 listed contaminants, 12 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L
- ✓ 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.