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Aquatic Life Criteria for Diazinon
Diazinon is mobile and moderately persistent in the environment. Due to its chemical properties and its widespread use, diazinon is frequently found in wastewater treatment plant effluent and urban and agricultural runoff. Diazinon is toxic to aquatic life, particularly invertebrates.
On December 31, 2004, it became illegal to sell diazinon products for residential use in the United States. It is still lawful to use diazinon properly under the Federal Insecticide, Fungicide and Rodenticide Act for non-residential agricultural or other uses. Even so, phasing out the residential uses of diazinon should significantly reduce the amount of this pollutant that enters surface waters. This final diazinon criterial will further reduce risks to birds and other terrestrial wildlife.
These criteria recommendations reflect new scientific data and other feedback we received from the public on the December 2003 draft criteria. States and tribes may use these criteria in developing their own water quality standards.
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- Final criteria fact sheet
- Federal Register Notice (February 23, 2006)
- Final Criteria document (PDF) (85 pp., 344 K)
- Background materials on Regulations.gov (EPA-HQ-OW-2003-0062)
Archive
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
In December 2003, we developed draft acute and chronic criteria recommendations for diazinon designed to protect aquatic life in both freshwater and saltwater.
- Fact Sheet
- Federal Register Notice (December 31, 2003)
- Draft Criteria document (PDF) (89 pp., 957 K)