POLLUTION LOCATOR|Animal Waste|County Trends in IOWA


Trends in Animal Waste Levels
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Year Number of Head Amount of Waste
(tons)
Volume of Waste
(gallons)
Amount of Nitrogen in
Waste (pounds)
Nitrogen lost to
Atmosphere (pounds)
Amount of Phosphorus
in Waste (pounds)
1987 291,267 550,000 130,000,000 6,800,000 4,900,000 2,300,000
1992 344,170 650,000 160,000,000 8,000,000 5,800,000 2,700,000
1997 436,353 830,000 200,000,000 10,000,000 7,300,000 3,400,000