Fleck Chromium-6 Filter

Buy Now

View full details

What does a chromium-6 laboratory test report typically show for water in Cleveland County?

If your water is tested for chromium-6 (also called hexavalent chromium or chromium(VI)), the report will list chromium-6 concentrations in micrograms per liter (µg/L) or parts per billion (ppb), equivalent units. For the Norman public water system serving Cleveland County, EPA monitoring detected chromium-6 in every tested sample, with levels ranging from just above 0.03 µg/L to a high near 97 µg/L. These are measurements from a federal survey between 2013 and 2015 and represent the system’s surface water source and distribution, not an individual home’s water.

How do ion exchange and reverse osmosis compare in addressing chromium-6 specifically?

Ion exchange equipment, like the Fleck Chromium-6 Filter, targets chromium(VI) ions in water by exchanging them for less harmful ions, effectively reducing hexavalent chromium levels at home. Reverse osmosis, in contrast, uses a membrane to remove a broad range of dissolved substances, including chromium-6, by physically filtering water molecules while leaving contaminants behind. Ion exchange typically focuses on chromium-6 exclusively, tending to require less water waste than reverse osmosis, which can reduce a wider range of dissolved solids but consumes more water and may affect flow rates.

How does chromium’s oxidation state change between the water source, distribution system, and your tap?

Chromium in water commonly exists in two main forms: trivalent chromium (Cr(III)), generally less mobile and less toxic, and hexavalent chromium (Cr(VI)), which is more soluble and reactive. In surface water systems like Cleveland County's, hexavalent chromium predominates due to oxygenated conditions. However, interactions with pipe materials, disinfectants, and changes in water chemistry can cause chromium to shift oxidation states as water moves through the distribution system and home plumbing. Thus, chromium-6 levels at your tap may not exactly match those at the system’s intake or reservoir.

What steps should I take to determine if chromium-6 is a concern for my household’s water?

Start with visual and taste observations: chromium-6 generally does not cause distinct taste, color, or odor issues. To rule out other causes, check for common water chemistry parameters like total dissolved solids or corrosion indicators that might suggest pipe material effects. Ultimately, a certified laboratory test specifically measuring chromium-6 in your home’s tap water is needed to know your actual exposure. This test should be ordered and collected according to laboratory instructions to ensure accurate results reflecting current water quality in your household.

What symptoms or issues in household water indicate chromium-6 presence?

Chromium-6 typically does not produce noticeable symptoms such as staining, discoloration, or odor changes. Unlike aesthetic contaminants, it is colorless and tasteless at typical environmental levels. Therefore, common household water complaints like bad taste, staining, or skin irritation usually stem from other constituents. The absence of such visible or sensory signs does not confirm the absence or presence of chromium-6, making testing necessary if there is concern.

Does chromium-6 concentration in Cleveland County water vary seasonally or over multiple years?

The EPA monitoring data for the Norman system collected during 2013-2015 shows chromium-6 detections consistently above the reporting level in all tested samples, with a median detection around 43.5 µg/L and highest near 97 µg/L. While this federal data comes from a limited multi-year window, it provides a snapshot rather than a continuous record. Seasonal variation and longer-term trends are not detailed in the data, so your local water quality may fluctuate outside this range. Home testing over time can provide a personalized view.

What should you not conclude about your water from this Cleveland County chromium-6 data?

Data from the public water system do not reveal the exact chromium-6 concentration in your household’s water. Detection in the system is not a violation or health-based limit exceedance; the EPA has no federal maximum contaminant level (MCL) for chromium-6 specifically, only for total chromium at 100 µg/L, and this system’s total chromium detections were below that level. Presence above reporting limits signals measurement, not necessarily a problem. Personal water testing and consultation with local water authorities or experts are necessary to understand your home's water quality and whether a Fleck Chromium-6 Filter or other technology is appropriate for your household.

Where this information comes from

Source: EPA SDWIS public water system record. Sampled 2014-03-24. These figures describe the public water system's record, not the plumbing inside any individual building.

On record: EPA UCMR3 monitoring (2013-2015) for Norman (OK1020801), OK: 160 results across 2 listed contaminants, 156 detections above the reporting level; no federal MCL for hexavalent chromium; total chromium MCL 100 ug/L