Contaminant Candidate List

EPA must first make determinations about which contaminants to regulate. These determinations are based on health risks and the likelihood that the contaminant occurs in public water systems at levels of concern. The National Drinking Water Contaminant Candidate List (CCL), published March 2, 1998, lists contaminants that (1) are not already regulated under SDWA (2) may have adverse health effects (3) are known or anticipated to occur in public water systems and (4) may require regulations under SDWA. Contaminants on the CCL are divided into priorities for regulation, health research and occurrence data collection. 

U.S. Environmental Protection Agency. Contaminant Candidate List 3 - CCL. Available at http //water.epa.gov/scitech/drinkingwater/dws/ccl/ccl3.cfin... 

The 1996 Amendments to SDWA require that every 5 years US-EPA establish a list of contaminants which are known or anticipated to occur in public water systems and may require future regulations under SDWA. The list is developed with significant input from the scientific community and other interested parties. After establishing this contaminant candidate list, US-EPA identifies contaminants, which are priorities for additional research and data gathering. US-EPA uses this... 

U.S. EPA (2003). Drinking water contaminant candidate list factsheet. Available at www. epagov / safewater/ccl/ccfls.html. 

In the United States, contaminant levels in drinking water are regulated under the Safe Drinking Water Act. The EPA regularly reviews these contaminants, and in 2008 they released a third draft Contaminant Candidate List for public review and comment [34], As part of the process to develop the list, the Agency evaluated pharmaceuticals and personal care products to identify those that had the potential to occur in drinking water provided by pubhc utilities. EPA considered 287 chemicals identified as pharmaceuticals and personal care products however, only one, nitroglycerin, was included on the draft list because most occurred at levels far below those currently associated with any adverse health effects, based on the best available human health effects data... 

The SDWA states that the USEPA must decide whether or not to regulate at least five different contaminants every 5 years, and that every 5 years they must publish a list of chemicals from which these contaminants are to be selected. This list is known as the Drinking Water Contaminant Candidate List and is subject to public review and comment (Pontius, 1998). To validate the analysis of the USEPA, the SDWA requires that they consult with the Science Advisory Board. Even though the USEPA must first select chemicals to review that pose the greatest threat to health, the SDWA allows the regulation of a chemical without scientific proof of danger should there be a valid health threat. However, every analysis must consider a benefit/cost study before regulation of a contaminant occurs. 

EPA 1997a. U.S. Environmental Protection Agency. Announcement of draft drinking water contaminant candidate list Notice. Federal Register. 62 FR 52194. October 6,1997. 

Carlson D. L. and Roberts A. L. (2002) Acid-and base-catalyzed hydrolysis of chloroacetamide herbicides. Amer. Chem. Soc., Div. Environ. Chem., Nat. Meeting, Symposium on Chemistry of EPA Contaminant Candidate List Compotmds, presented August, 2002, Boston, MA. 

The National Contaminant Occurrence Database, which stores data on the occurrence of both regulated and unregulated materials, was established by EPA. The monitoring data provides the basis for identifying contaminants that may be placed on future Contaminant Candidate Lists and support the Agency s decisions to regulate contaminants in the future. 

US Environmental Protection Agency (2003) Contaminant Candidate List Regulatory Determination Support Document for Sulfate. EPA-815-R-03-16. 

Chemical Screening and Prioritization. There is urgent need for the rapid and cost-efficient screening of chemicals so they can be prioritized for risk assessment. This includes chemicals that are produced in high volumes, toxicants in the air, the drinking water Contaminant Candidate list, and chemicals found at Superfund sites. 

Fact sheet the drinking water contaminant candidate list - the source of priority contaminants for the drinking water EPA 815-F-05-001... 

Fact Sheet Final Third Drinking Water Contaminant Candidate List (CCL 3) presented by US EPA. Available at http //www.epa.gov/ogwdw/ccl/pdfs/ccl3 docs/fs cc3 final.pdf (last accessed on April 2013). 

---