In 2002 EPA published an updated compilation of its national recommended water quality criteria for 158 pollutants. EPA water quality criteria provide recommendations to states and tribes authorized to establish water quality standards under the Clean Water Act. Additionally, EPA developed a criteria calculation matrix which provides: cancer potency factors, reference doses, relative source contributions, fish intake values, and equations used to derive the 2002 human health criteria.

• National Recommended Human Health Criteria: 2002 (PDF)(36 pp, 344 K, November 2002, EPA-822-R-02-047)
• Human Health Criteria Calculation Matrix (PDF)(23 pp, 423 K, November 2002, EPA-822-R-02-012)