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Frequently Asked Questions

A compiled list of the most frequently asked questions about the 
Chemical Right-to-Know Program and the HPV Challenge Program 


Note: EPA no longer updates this information, but it may be useful as a reference or resource.



[PDF] PLEASE NOTE: Some of the documents mentioned in this Section are in Adobe's Portable Document Format (PDF). To view or print them you will need to have the Adobe Acrobat Reader program installed on your computer. The Reader can be downloaded and used with no charge; check here for more information on the Adobe Acrobat Reader.

Many people have raised concerns about animal testing and the HPV Challenge Program. You can download the Agency's Factsheet on Animal Welfare (PDF Format) to learn what the EPA is doing to avoid unnecessary testing and to reduce the use of animals.

Letters from companies and other sources asking specific technical questions about the HPV Challenge Program. The Agency response is included with each letter.

Detailed technical information on some of the issues appearing briefly in the FAQs can be found in the papers posed on the Guidance documents page.

The Agency has prepared a series of  Fact Sheets on the ChemRTK Initiative. They are a convenient source of information on various aspects of ChemRTK, including the HPV Challenge Program and Children's Chemical Health Testing, and address issues ranging from animal welfare to voluntary participation in the HPV Challenge. These documents are in PDF format and will require the Adobe Acrobat Reader.

Please Note: Links on this page marked "Exit EPA" lead to web pages not owned or maintained by the U.S. Environmental Protection Agency, and the Agency makes no judgments concerning their content.


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