American Public Works Association
http://www.pubworks.org/

American Water Works Association
http://www.awwa.org/

Association of Metropolitan Sewerage Agencies
http://www.amsa-cleanwater.org/

Central States Water Environment Association
http://www.cswea.org/

Great Lakes By-Products Management Association
http://www.glbma.org/

Illinois Association of Wastewater Agencies
http://www.ilwastewater.org/

Illinois Environmental Regulations - Title 35
http://www.ipcb.state.il.us/SLR/IPCBandIEPAEnvironmentalRegulations-Title35.asp

Iowa Admin. Code - Environmental Protection
http://www4.legis.state.ia.us/IAChtml/567.htm

Iowa Admin. Code - Natural Resources
http://www4.legis.state.ia.us/IAChtml/561.htm

National Biosolids Partnership
http://biosolids.org/

Wis. Admin. Code - Environmental Protection - General
http://www.legis.state.wi.us/rsb/code/nr/nr100.html

Wis. Admin. Code - Environmental Protection - Water Supply
http://www.legis.state.wi.us/rsb/code/composite.html

Wis. Admin. Code - Environmental Protection - WPDES
http://www.legis.state.wi.us/rsb/code/nr/nr200.html

Wisconsin Wastewater Operators Association
http://www.wwoa.org/

Drycleaner Environmental Response Trust Fund of Illinois
http://www.cleanupfund.org/

Illinois State Fabricare Association
http://www.isfa.net/

Illinois Department of Environmental Protection
http://www.epa.state.il.us/

Illinois Pollution Control Board
http://www.ipcb.state.il.us/

Illinois Water Environment Association
http://www.iweasite.org/

Indiana Department of Environmental Management
http://www.in.gov/idem/

Indiana Environmental Rules & Laws
http://www.in.gov/idem/rules/

Iowa Department of Natural Resources
http://www.iowadnr.com/

Michigan Department of Environmental Quality
http://www.michigan.gov/deq

United States Environmental Protection Agency
http://www.epa.gov/

Wisconsin Department of Commerce
http://www.commerce.state.wi.us/

Wisconsin Department of Natural Resources
http://www.dnr.state.wi.us

Indiana Water Environment Association
http://www.indianawea.org/index.shtml

International Water Association
http://www.iawq.org.uk/template.cfm?name=home

Water Environment Federation
http://www.wef.org

Wisconsin Rural Water Association
http://www.wrwa.org/

Wisconsin Water Association
http://www.wih2oassoc.org/