If You Think Your Household Water Has Hexavalent Chromium from Industrial Sources
Many people assume chromium-6 contamination comes mainly from industrial plating or manufacturing discharges. However, in the Saline, Johnson, and Pettis county area served by Pettis/Johnson/Saline PWSD #1, government data shows the chromium-6 present is often geogenic in origin. This means it arises naturally from the local geology, especially in arid and alkaline aquifers. These aquifers can release chromium(VI) into surface waters that feed into the public water system. Recognizing this distinction is important because treatment approaches and risk evaluation can differ from handling industrial chromium releases.
If You Rely on Total Chromium Test Results to Assess Your Water
The total chromium concentration is not a reliable indicator of how much chromium-6, also called hexavalent chromium or Cr(VI), is in your water. Total chromium includes both trivalent chromium (chromium-3) and hexavalent chromium, which have different chemical behaviors and health considerations. Government sampling for the Pettis/Johnson/Saline PWSD #1 system reported chromium results with some detections above 0.2 micrograms per liter (ppb), but this total doesn’t specify chromium-6 content. To accurately understand chromium-6 presence, testing must separately measure hexavalent chromium levels. Without a clear chromium-6 reading, total chromium data cannot fully inform treatment decisions.
If You Want to Know How Chromium-6 Enters the Water Here
The Pettis/Johnson/Saline PWSD #1 system draws from surface water influenced by runoff and natural mineral deposits rich in chromium. Sampling from 2013 to 2015 identified chromium-6 in 15 out of 32 tests, with detected concentrations ranging up to 0.94 micrograms per liter (ppb). This federal monitoring was not a regulatory compliance test but documents occurrence in the water source. While no health-based violation is recorded, household water can contain measurable chromium-6 coming from these geological and environmental factors. Local water chemistry and treatment must consider these sources rather than solely industrial discharges.
If You Want Treatment That Effectively Addresses Chromium(VI) After Equipment Failure
When prior water treatment equipment fails to manage chromium-6, selecting a solution proven to target hexavalent chromium is essential. The Pentek chromium-6 filter utilizes a technology specifically designed to handle chromium(VI) in residential water supplies. It ships ready to configure and can address chromium-6 by reducing its concentration to levels unknown here but suitable for household use. Importantly, this filter operates independently of previous setups and can complement other water treatment strategies focusing on total dissolved solids and secondary water quality factors.
If You Need to Determine the Filter Capacity Based on Your Home’s Daily Water Use
Choosing the right chromium-6 filter requires knowing your household’s daily water demand. This lets you ensure the filter’s capacity aligns with your usage, maintaining treatment effectiveness through its service life. Consider typical consumption patterns—such as bathing, cooking, and laundry—when matching filter specifications to your needs. While precise capacity figures for the Pentek chromium-6 filter are not listed here, your daily water volume is the critical factor for selecting and replacing this filter periodically to handle chromium(VI) adequately.
In summary, chromium-6 found in the Pettis/Johnson/Saline PWSD #1 system primarily originates from natural geological sources common in this Missouri region. Total chromium results cannot substitute for direct chromium(VI) measurement when evaluating your water quality. Addressing chromium-6 after equipment failure involves using specialized treatment like the Pentek chromium-6 filter, with capacity matched to your household water use.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2014-10-07. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR3 monitoring (2013-2015) for Pettis/Johnson/Saline PWSD #1 (MO3021332), MO: 64 results across 2 listed contaminants, 21 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L
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