The Risk Assessment Information System

Established Regulatory Limits for Surface Water and Groundwater

Select ARAR Source


The regulatory limits for surface water and groundwater contained in this database comprise chemical-specific preliminary remediation goals (PRGs) based on potential Applicable or Relevant and Appropriate Requirements (ARARs). These values should be used in conjunction with PRGs based on risk assessment to ensure that the PRGs for a site meet the residual risk requirements for protection of human health and the environment in the National Oil and Hazardous Substance Pollution Contingency Plan (NCP). In some cases, the values presented in this database may be To-Be-Considered (TBC) Guidance because these values are superceded by site-specific state requirements.

Federal Water Criteria Source

The 2012 Edition of the Drinking Water Standards and Health Advisories (EPA 822-R-9-011) is available in pdf format here. Our Federal ARAR database search tool uses the pdf version rather than the html version below.

Federal Drinking Water Regulations Source

Read the footnotes provided. They are important.

Always check the original sources of the ARARs for updates. Not every State is updated with the same frequency.

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