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Drinking Water Requirements for States and Public Water Systems

Arsenic Rule Compliance for Community Water System Owners and Operators

Arsenic Rule Compliance

Compliance with the Arsenic Rule requires additional monitoring and community water system actions beyond compliance with the chemical contaminants rules.

Quick Reference Guide to Arsenic and Clarifications to Compliance and New Source Monitoring Rule

This document provides a simple and straightforward summary of the rule. It includes critical deadlines and requirements for PWSs and states, and information on monitoring requirements.

12 Steps to Arsenic Compliance and Helpful Resources for Public Water Systems

This factsheet provides a checklist to help PWSs move towards compliance with the Arsenic Rule. With each step, a list of EPA's most helpful references is included.

Arsenic and your distribution system

This fact sheet helps PWSs understand and respond to issues that may arise with arsenic. It also covers distribution system concerns resulting from the installation of arsenic treatment.

A System's Guide to the Identification and Disposal of Hazardous and Non-Hazardous Water Treatment Plant Residuals

Drinking water PWSs producing solid waste are required to determine whether that waste is hazardous. These requirements are described in this document in summary form only.

Technologies and Costs for Removal of Arsenic from Drinking Water

Evaluating Arsenic Treatment Providers: A Guide for Public Water Systems

This document provides an overview on the long-term, chronic health effects linked to arsenic. It describes available treatment technologies for arsenic removal and questions to ask vendors about technologies.

Historic Arsenic Guidance Information

The page provides information on the potential health effects of exposure to arsenic. It includes an overview of the rule and background information on natural occurrence of arsenic.

Additional Resources

The following links provide additional information about the Phase II/V Rule and the Arsenic Rule.

Arsenic Information for Consumers


For more information, please see the Chemical Contaminant Rules page.

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Arsenic Tools

Virtual Trade Show

EPA has developed a site to help PWSs come into compliance with the Arsenic Rule. The website contains:

  • Brief treatment technology descriptions,
  • The interactive decision trees,
  • Questions to ask engineers and vendors when choosing a treatment technology, and
  • A searchable vendor database.

Visit the Arsenic Virtual Trade Show website.

Arsenic Treatment Technology Evaluation Handbook for Small Systems

This handbook includes arsenic treatment information, cost evaluation tools, and design considerations for treatment technologies. The handbook enables PWSs to make decisions about treatment approaches to address arsenic concerns.

The handbook includes a series of process selection decision trees. These were developed to help systems select the most appropriate arsenic mitigation strategy.

The decision trees contained in this document were current when the handbook was published in 2003. They are still relevant and can provide a simple guide for selecting an arsenic treatment. However, EPA has modified the trees since publication to reflect changes in regulation and treatment technologies.

More Information on Arsenic Treatment Technologies

EPA's Office of Research and Development is focusing on research and development of more cost effective technologies. ORD is conducting:

  • treatment technology demonstration projects;
  • short-term performance verification studies of commercially-ready arsenic treatment technologies;
  • research to emphasize management of residuals from arsenic treatment,
  • improved analytical methods, treatment process optimization and distribution system studies; and
  • developing training materials, software and design manuals and providing direct training and technical assistance on how to meet the arsenic standard.

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