Chromium 6 Water Filter Comparison

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Best Chromium Water Filter Systems for Hexavalent Chromium 6

Chromium 6 (Hexavalent) is a dangerous carcinogen linked to stomach and other gastrointestinal tumors. The atomic diameter of chromium is .000256 microns. The chromium water filters that we recommend below all filter out particles down to .0001 microns. This means that any of these water filter systems will effectively filter out chromium 6 from your drinking water. Not all reverse osmosis water filter systems remove Chromium 6 (Hexavalent) as effectively as others.

We have done exhaustive research of many, many chromium water filter systems. We have looked at virtually all brands available today. We did not limit ourselves to just products we carried, but sought the widest cross-section of chromium water filter systems available because we understand how important it is to you to remove the maximum chromium from your water. Below are the most effective chromium water filter systems we found from all the chromium water filter systems we looked at and compared.

Watts WQC4RO11-50 Kwik Change Reverse Osmosis System 50 gpd Watts Premier 531411 RO-PURE RO-4 Reverse Osmosis System 50 gpd
System Price
$269.99 $242.99
Filter Change Cost Over 2 Yrs
$213.97 $185.97
Filtration per Day
50 Gal 50 Gal
Smallest Particle Size Filtered
The lower the micron rating the more particles the water filter will trap
.0001 mic .0001 mic
eFilterWater Review Grade
eFilterWater reviews the systems we sell for the following:
  • Taste of water produced
  • Appearance/size of system
  • Ease of installation
  • Ease of changing filters
And we give it a grade to tell you what we think, so you don't get any surprises!
Separate Tank Size
4.4 gal 3 gal
1 yr 3 yr
Removes (partial List - see product page for complete specs)
   Chromium 99% 99%
   Lead 98.80% 98.80%
   Cysts 99.99% 99.99%
   Turbidity 99% 99%
   Total Dissolved Solids (TDS) 97% 97%
Operating Pressure Range
Operating pressure range is the min and max range of water pressure that the system will operate under for optimal production/performance. Most homes on city water average between 55 psi - 65 psi of static water pressure. More water pressure is not necessarily a good thing for some systems.
35-100 psi 40-85 psi
Watts WQC4RO11-50 Kwik Change Reverse Osmosis System 50 gpd Watts Premier 531411 RO-PURE RO-4 Reverse Osmosis System 50 gpd

In 2009, California officials proposed setting a "public health goal" for hexavalent chromium in drinking water of 0.06 parts per billion (ppb) to reduce cancer risk. Hexavalent chromium (or chromium-6) gets into water supplies after being discharged from steel and pulp mills as well as metal-plating and leather-tanning facilities.

Chromium has several different forms. Trivalent chromium (chromium-3) is a nutrient essential to sugar and lipid metabolism, but hexavalent chromium (chromium-6) is a dangerous toxin.

People with less acidic stomachs appear to have limited ability to convert hexavalent chromium to trivalent chromium, exposing them to higher levels of the toxic form and putting them at greater risk. Children and infants also are more vulnerable to chromium 6 and its effects because their bodies are less able to get rid of this harmful chemical.

Chromium 6, hexavalent chromium, and chromium in drinking water is likely to raise everyone’s risk of cancer but it can be significantly reduced by using a chromium water filter system.

History of Chromium in Drinking Water

Chromium bears Atomic Number 24 on the Periodic Table of Elements and is described as a hard brittle gray transition metal. It was discovered by Nicholas Louis Vauquelin in Paris, France in 1797. Chromium is used to make stainless steel. Hexavalent chromium is used for the production of stainless steel, textile dyes, wood preservation, leather tanning, and as anti-corrosion and conversion coatings as well as a variety of niche uses. It is also used in plating for car parts, tools, knives, camouflage paint, stereos, video tapes and lasers. Chromium also gives rubies and emeralds their color. For such a useful metal, it has come to be known as a very carcinogenic material to humans.

We are most familiar with chromium in the hexavalent form. However, chromium occurs in many forms including hexavalent chromium, trivalent chromium which is not carcenogenic, pentavalent chromium, chromium trioxide, and various salts of chromate and dichromate. Soluble compounds, like chromic acid, are much weaker carcinogens. The forms vary in levels of dangers to humans with hexavalent chromium leading the way because it is able to enter cells unlike other forms of chromium.

People involved in the production of any of the above products become exposed to chromium from inhalation, ingestion, or from skin and/or eye contact. Prolonged and repeated exposure can cause lung cancer and when ingested, chromium can cause stomach cancer and gastrointestinal tumors.

Chromium 6 (hexavalent chromium) was made famous by the movie Erin Brockovich that portrays the real life story of a file clerk in a law office who uncovers a conspiracy by Pacific Gas and Electric (PG&E) to cover up the industrial poisoning of the water of the town of Hinkley, CA.

Regulation of Chromium in Drinking Water

There is currently no enforceable regulation in place concerning the acceptable levels of Hexavalent Chromium 6 in drinking water in the United States.

In 1974, Congress passed the Safe Drinking Water Act. This law requires the EPA to determine the level of contaminants in drinking water at which no adverse health effects are likely to occur. The EPA has set a regulation for chromium (total) at 0.1 mg/L or 100 ppb.

The State of California, the only state to require tap water tests for hexavalent chromium, has proposed, but not yet enacted, a more stringent limit of 0.1 parts per billion of chromium that is allowable in drinking water.

On January 26, 2011 Senator Barbara Boxer (D-CA), Chairman of the Senate Environment and Public Works Committee with Senator Dianne Feinstein (D-CA) as an original co-sponsor, introduced legislation in the 112th Congress to protect children and families from dangerous toxins in drinking water. S. 79, Protecting Pregnant Women and Children from hexavalent chromium in drinking water would establish a deadline for EPA to set an enforceable drinking water safeguard for hexavalent chromium.