The following list of high priority "contaminants of concern" was developed by the Columbia River Toxics Reduction Working Group to support their work to identify and reduce toxics in the Columbia River Basin. A printable version is also available below.
Tier I (highest priority) |
Tier II |
Tier III |
---|---|---|
|
|
|
1This prioritization was written by the Columbia River Toxics Working Group. It does not necessarily represent the priorities of individual agencies participating in the group. Refer to the document below for information about the factors considered in these rankings, and how these tiers inform the group's work. |
-
Prioritization of Toxics in the Columbia River (PDF)(2 pp, 101 K,
July 17, 2007)
List of toxics and ranking factors developed by the Columbia River Toxics Reduction Working Group.