Autotrol Chromium-6 Filter

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Oxidation States and Chromium(VI) Behavior from Source to Tap

Chromium in water can exist mainly as trivalent chromium (Cr(III)) or hexavalent chromium (chromium-6, Cr(VI)). Surface water sources supplying the Kennebunk, Kennebunkport & Wells Water District contain chromium-6 in forms measured during EPA's UCMR3 monitoring period from 2013 to 2015. The oxidation state can be influenced by water chemistry changes during treatment and distribution, potentially altering chromium speciation before it reaches household taps. However, direct measurement at the tap is required to confirm the specific chromium-6 levels in an individual home.

Reading the Median and Range: What the Record Shows for Residents

The EPA's public water system record for this area reports 12 chromium-6 measurements with eight detections above the 0.03 micrograms per liter (µg/L) reporting level. The detected concentrations ranged up to 0.19 µg/L with a median detection of 0.06 µg/L. These figures represent system-wide sampling points and serve as indicators rather than definitive statements of any single household's water.

California’s 10 Microgram-per-Liter Standard and Its Significance Here

California established a public health goal of 10 µg/L for chromium-6, which is considerably higher than the observed maximum in this system. This standard is used by some as a guideline for monitoring and action, but no federal maximum contaminant level (MCL) currently exists for chromium-6. York County's water system has no recorded health-based violations related to chromium or chromium-6.

Ion Exchange Versus Reverse Osmosis: Their Roles in Chromium(VI) Treatment

Ion exchange technology specifically targets charged particles like chromium(VI), allowing selective removal before water reaches household use. Reverse osmosis filters water at the membrane level, also reducing chromium-6 among many dissolved substances but with different operational impacts and water usage characteristics. Both technologies provide documented solutions suitable for residential water treatment and ship ready to configure.

Distinguishing Chromium-6 from Commonly Confused Water Concerns

Chromium-6 should not be conflated with total chromium levels or with other water quality issues such as hardness or aesthetic challenges. The federal record shows no detections of total chromium above the reporting limit, indicating that chromium-6 represents the chromium fraction of concern. Understanding this difference helps target testing and treatment needs for homeowners.

Scope and Statistical Considerations Behind the Reported Data

The public water system record is based on 12 samples collected at various points within the Kennebunk, Kennebunkport & Wells Water District. While this sample size offers useful regional insight, it is limited in reflecting variability between individual wells or taps. Comprehensive water testing at the household level remains necessary to determine actual chromium-6 exposure.

To address chromium-6 concerns confirmed by individual water tests, the Autotrol Chromium-6 Filter provides a validated approach using ion exchange methods to treat this constituent effectively.

The data summarized here come from the EPA’s Safe Drinking Water Information System (SDWIS) for the Kennebunk, Kennebunkport & Wells WD (ME0090760). For current and detailed records, consulting official government sources is recommended.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2014-12-03. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Kennebunk, Kennebunkport & Wells WD (ME0090760), ME: 24 results across 2 listed contaminants, 8 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L