International Guidelines
UK
Department for Environment Food and Rural Affairs (DEFRA)
Sewage in the environment
www.defra.gov.uk/environment/quality/water/sewage/
Safe Sludge Matrix
Anon (2001) 'The Safe Sludge Matrix. Guidelines for the Application of Sewage Sludge to Agricultural Land.' British Retail Consortium. Water UK. Agricultural, Development and Advisory Service. www.assuredproduce.co.uk/_code/common/item.asp?id=4033093
USA
United States Environmental Protection Agency (USEPA) Office of Wastewater Management
www.epa.gov/owm/mtb/biosolids/index.htm
USEPA homepage. This website includes the USEPA reference rule "CFR Part 503" for biosolids.
National Biosolids Partnership's environmental management system (EMS) for biosolids program
www.wef.org/biosolids/
The City of Los Angeles Biosolids Environmental Management System
www.lacity.org/san/biosolidsems/index.htm
Ontario, Canada
Draft: Guide for the Beneficial Use of Non-Agricultural Source Materials on Agricultural Land.
www.ene.gov.on.ca/envision/env_reg/er/documents/2004/PA04E0008.pdf
EUROPE
Sewage Sludge Directive 86/278/EEC
