Clean Water Act (CWA) - rules related to HHC

This page contains documents on National Toxics Rule (NTR) and Integrated Risk Information System (IRIS) concerning human health criteria.

Abbreviations and for more information:

EPA: Environmental Protection Agency
PF: Policy Forum


National Toxics Rule (NTR)--1992 EPA website:
PF 3, page 67:
PF 7, page 48:
NTR—1999 Amendments EPA websites:
NTR Pollutants Spreadsheet for HHC PF 5:
EPA’s Integrated Risk Information System (IRIS) EPA website:
PF 5, page 77:
IRIS Agenda Chemicals from EPA PF 5:
PF 5, page 77:







Back to Index for Human Health Criteria Rulemaking




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Last updated October 2014