Below is information about arsenic and the standard of 10 ppb, which went into effect in 2006.

• NGWA-submitted comments on EPA's decision to lower the arsenic in drinking water standard (PDF)
• EPA Drinking Water Standard for Arsenic — general fact sheet (PDF)
• EPA Technical Fact Sheet: Final Rule for Arsenic in Drinking Water (PDF)
• EPA-submitted National Primary Drinking Water Regulations; Arsenic and Clarifications to Compliance and New Source Contaminants Monitoring (PDF)
• Arsenic in drinking water — arsenic information on the EPA's Web site