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Layer: Toxic Organics (305(b)) (ID: 3)

Name: Toxic Organics (305(b))

Display Field: RAD305B_ALL_Water_Name

Type: Feature Layer

Geometry Type: esriGeometryPolyline

Description: Toxic organic chemicals are harmful, man-made chemicals containing carbon. These often remain in the environment for long periods and can accumulate in animal and fish tissues and sediments. They also can get into drinking water supplies, posing potential long-term health risks to humans. Toxic organic chemicals are the reported cause of waterbody impairment in over 280 waters nationwide. These pollutants include a large number of chemicals such as solvents, pesticides, dioxins, PCBs, furans, and other nitrogen compounds. Common sources include wood preservatives, antifreeze, dry cleaning chemicals, cleansers, and a variety of other chemical products. Two important sources of toxic organic chemicals in water are improper disposal of industrial and household wastes and runoff of pesticides. Excessive application of insecticides, herbicides, fungicides, and rodenticides, or application of any of these shortly before a storm, can result in toxic pesticide chemicals being carried from agricultural lands, construction sites, parks, golf courses, and residential lawns to receiving waters. Other organic pollutants come from auto exhaust and from burning municipal and chemical wastes. Organic pollutants can build up in aquatic animals and increase in concentration through the food chain. These substances can be toxic to all forms of life, and are known to cause cancer in animals. For humans, some of them are suspected to cause cancer and are also known to have negative impacts on our immune, reproductive, nervous, and endocrine systems.

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