Estrogens and Estrogenic Activity in Swine Manure

Project Staff: 

Kuldip Kumar, Research Associate, Department of Soil, Water, and Climate, Satish Gupta, Professor, Department of Soil, Water, and Climate, and Ashok K. Singh, Associate Professor, Department of Veterinary Population Medicine, University of Minnesota


USGS-WRRI 104B/ CAIWQ Competitive Grants Program

Project Duration: 

March 2005 - February 2006


Estrogen hormones are one of many emerging contaminants that are attracting public attention because at low concentrations these pollutants can adversely affect the reproductive biology of vertebrate species such as fish, turtles, frogs, wild animals, and humans. One source of these contaminants to water bodies is from runoff from manure-applied field. The potential impact of these chemicals present in manure on the quality of surface and ground waters, and aquatic ecosystems remains to be elucidated. However, as a start, there is a lack of research data on the scope of estrogen levels, especially conjugated estrogens and their estrogenic activity in various types of manure. Minnesota ranks third in hog production in the United States with 6.4 million pigs. This is the equivalent of 9.1 million tons of manure production annually. The goal of this research is to quantify the levels of various forms of estrogens and their activity in various types of swine waste facilities in Minnesota. This would provide a baseline data base in the extent of estrogen levels in swine manure and how these levels and the estrogenic activity varies with age of pigs, different production style (farrow-to-feeder; feeder-to-finish; and farrow-to-finish), different waste management plans (open lagoons vs covered lagoons; aerobic vs. anaerobic lagoons) and seasons (spring, summer, fall/winter). To be successful in protecting the water quality in Minnesota lakes, rivers, and aquifers, risk identification and assessment need to precede mitigation plans. Thus, this project will provide the baseline data for estrogen levels and estrogenic activity in various swine facilities in Minnesota. This research is relevant to the concern of public health and ecological impact. The data generated in this study will be useful to state and federal agencies for environmental risk assessment.


Conference Proceedings

Kumar, K., S. Gupta, A. Singh, S.C. Gupta, Y. Chander, L. Hundal, A. Cox, and T. Granato. 2006. Occurance of Estrogenic Compounds in Manures and Biosolids. Invited Paper at the Special Symposium on Emerging Contaminants and Land−applied Biosolids and Manures: State of the Science and regulatory implications. ASA−CSSA−SSSA International Annual Meetings. November 12−16, 2006.

Kumar, K. S. Gupta, A.K. Singh, S.C. Gupta, and Y. Chander. 2006. Estrogens in Swine Manure. Minnesota Water 2006 and Annual Water Resources Joint Conference Oral Presentation. October 24−25, 2006, Brooklyn Center, MN.