updated 5/4/2006 10:08:13 AM ET 2006-05-04T14:08:13

A study of pesticides in snow at national parks found the following amounts of pesticides in 2003. A nanogram equals 1 billionth of a gram.

Denali National Park and Preserve: amount of dacthal, a current-use pesticide, was 0.0006 to 0.036 nanograms per liter; amount of hexachlorocyclohexanes, a banned pesticide, was below 0.0006 nanograms per liter.

Gates of the Arctic National Park and Preserve: dacthal at 0.0098 nanograms, hexachlorocyclohexanes at below 0.006 nanograms.

Glacier National Park: dacthal at between 0.23 and 0.17 nanograms, hexachlorocyclohexanes at between 0.12 and 0.23 nanograms.

Mount Rainier National Park: dacthal at between 0.0097 and 0.20 nanograms, hexachlorocyclohexanes at between 0.069 and 0.11 nanograms.

Noatak National Preserve: dactahl at 0.011 nanograms, hexachlorocyclohexanes at 0.20 nanograms.

Rocky Mountain National Park: dachtahl between 1.4 and 1.5 nanograms, hexachlorocyclohexanes at between 0.079 and 0.14 nanograms.

Sequoia National Park: dachtahl at between 1.8 and 3.1 nanograms, hexachlorocyclohexanes at between 0.086 and 0.17 nanograms.

Additional background on the studies are online at www2.nature.nps.gov/air/Studies/air_toxics/wacap.cfm

Copyright 2006 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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