Historical Water Quality Criteria Documents

In 1976 and 1986, the U.S. Environmental Protection Agency published Quality Criteria for Water (known as the "Red Book" and the "Gold Book"). The criteria in these documents are still current where a more recent criteria has not been published.

• Quality Criteria for Water, 1976 ("Red Book")
• Quality Criteria for Water, 1986 ("Gold Book")

The table represents previously published ambient water quality criteria. They are intended to be used for historical reference only.