The Risk Assessment Information System

Established Regulatory Limits for Surface Water and Groundwater

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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 In some cases, the values presented in this database may be To-Be-Considered (TBC) Guidance because these values are superceded by site-specific state requirements.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 Quality Criteria Tables Source

The current National Primary Drinking Water Standards and Health Advisories are from the tables found here.

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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