EPA updated its national recommended water quality criteria for human health for 94 chemical pollutants to reflect the latest scientific information and EPA policies, including updated fish consumption rate, body weight, drinking water intake, health toxicity values, bioaccumulation factors, and relative source contributions. EPA accepted written comments from the public on the draft updated human health criteria from May to August 2014 and prepared responses to those comments. EPA water quality criteria provide recommendations to states and tribes authorized to establish water quality standards under the Clean Water Act.

• Fact Sheet: Human Health Ambient Water Quality Criteria: 2015 Update (PDF)(3 pp, 144 K, June 2015, EPA 820-F-15-001)
• EPA Response to Public Comments (PDF)(48 pp, 526 K)
• Table comparing EPA's updated 2015 final human health criteria to previous criteria (PDF)(4 pp, 133 K)
• Table Summarizing Updated Input Values for EPA's 2015 Final Updated Human Health Criteria (PDF)(4 pp, 160 K)