California Proposition 65

Attention California Residents:

California Proposition 65 is known as The Safe Drinking Water and Toxic Enforcement Act of 1986. To comply with this California Act, even chemicals used within the limits of national regulations and found not hazardous in the quantities associated with the product may require a warning just because the chemical is present. Information about Proposition 65 and this warning are available on the website of the Office of Environmental Health Hazard Assessment (OEHHA) maintained by the State of California. To view our test results, click here.

Arsenic in GAC

California requires the following notice:

WARNING: Some GAC contains arsenic, components also may leach chemicals, which known to the State of California, can cause cancer and birth defects or other reproductive harm.

For the highest level of assurance that leaching of any type is not occurring a laboratory water test would be recommended.

Some coal-based carbon, when extracted from mines, contains Arsenic, which is a natural geological occurrence. 

To learn more, go to

Crystal Quest® uses Arsenic-Free GAC™ which is a coconut shell-based granulated activated carbon (pre-washed and dust-free), in all filtration systems and replacement cartridges.

Toxicology testing is also performed to assure that GAC raw material is free from silver (Ag), Arsenic (As) and Antimony (Sb).

To learn more, click here.


The information and/or water report used to make product recommendations is believed to be accurate to the best knowledge of Crystal Quest® Manufacturing. The information provided relates only to the specific product recommended. Crystal Quest® Manufacturing assumes no legal responsibility for use of or reliance upon the information provided. Crystal Quest® products are free of leach back of such toxicities as asbestos, lead, arsenic, silver, aluminum, and other substances. Crystal Quest® products are in full compliance with California Proposition 65. It is the sole responsibility of the customer to research given information in order to make an educated decision to purchase and use water filtration products, based on all available research information.

The links below are provided as sources of information and do not necessarily reflect the views of Crystal Quest®, it’s employees or affiliates.