US Environmental Protection Agency (human health soil screening levels)
http://www.epa.gov/reg3hwmd/risk/human/rb-concentration_table/index.htm
Office of Environmental Health Hazard Assessment (OEHHA)
http://www.oehha.org/ecotox.html
Canadian Council of Ministers of the Environment (environmental quality values)
http://st-ts.ccme.ca/
UK Environment Agency
http://www.environment-agency.gov.uk/research/planning/33714.aspx
Ministry of Infrastructure and the Environment (target and intervention values)
http://www.ministryofinfrastructureandtheenvironment.nl/topics/the-environment/roles_and_responsibilities_of_the_ministry/
A collection of tables of soil and groundwater quality guidelines from around the world:
http://www.sanaterre.com/guidelines/index.html
National Environment Protection Council (environmental investigation and intervention values)
http://www.ephc.gov.au
Landcare Research
www.landcareresearch.co.nz
US Environmental Protection Agency
http://rais.ornl.gov/guidance/epa_eco.html
Landcare Research
www.landcareresearch.co.nz
Landcare Research
www.landcareresearch.co.nz
Oak Ridge National Laboratory
http://rais.ornl.gov/tools/eco_search.php
United States Geological Survey (Columbia Environment Research Center)
http://www.cerc.usgs.gov/data/data.htm
US Environmental Protection Agency (Ecotoxicology)
http://www.epa.gov/ecotox)
Toxicology Data Network
http://toxnet.nlm.nih.gov
Last updated: 19 October 2011