| |
| | USGS Clackamas River Water Quality Study (Site not responding. Last check: 2007-10-22) |
 | | The Clackamas River in northwestern Oregon drains the western slope of the Cascade Range, descending from forested highlands into the Willamette Valley. |
 | | Water quality in the Clackamas River is considered very good to excellent compared with that of other rivers in the State, based on the Oregon Department of Environmental Quality's Water Quality Index, and has withstood pressures from human impacts and natural disturbances seemingly well. |
 | | During 2003, samples of untreated Clackamas River water used for drinking were analyzed for numerous contaminants, including pesticides, volatile organic compounds, and various wastewater compounds such as caffeine, hormones, pharmaceuticals, and other compounds. |
| or.usgs.gov /projs_dir/or176/or176.html (611 words) |
|