964 resultados para Illinois. Division of Soil and Water Conservation


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"The Illinois Environmental Protection Agency monitors surface waters (i.e. lakes and streams) through a variety of programs. The most extensive is the Ambient Water Quality Monitoring Network (AWQMN) which consists of 203 stream stations statewide sampled on a 6 week cycle since October 1977." -- p. 1.

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"IEPA/WPC/88-009."

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"IEPA/WPC/93-192."--Cover.

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Bibliography: p. 73-76.

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Bibliography: p. 33.

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"IEPA/WPC/89-275"--Cover.

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"Center for Wildlife Ecology."