You are using an unlicensed and unsupported version of Evoq Basic. Please contact for information on how to obtain a valid license.


Covering Proposition 65 News and Events Since 1987

OEHHA Adopts Malathion NSRL

OEHHA Adopts Malathion NSRL

Author: Jack Schatz/Tuesday, February 27, 2018/Categories: California Law and Regulation, Prop65, Regulatory Proposals

Rate this article:
No rating

California’s Office of Environmental Health Hazard Assessment has adopted a new Safe Harbor Levels for a pesticide listed under Proposition 65.

The agency set the regulatory limits for the pesticide Malathion, approving a  No Significant Risk Level of 180 micrograms a day for the chemical.

The proposed NSRL is based on a carcinogenicity study in rodents and was derived using the methods described in Section 25703 of the Proposition 65 Regulations.

Malathion is a pesticide that is widely used in agriculture, residential landscaping, public recreation areas, and in public health pest control programs such as mosquito abatement and eradication programs. In the US, it is the most commonly used organophosphate insecticide.

Malathion has been used to combat crop losses from the Mediterranean fruit fly, and  more recently to eradicate mosquitoes that carry the West Nile virus.

Malathion was listed as known to the state to cause cancer under Proposition 65 on May 20, 2016.   The NSRL for malathion takes effect on April 1, 2018.



Number of views (189)/Comments (0)

Jack Schatz

Jack Schatz

Other posts by Jack Schatz
Contact author

Please login or register to post comments.



Sort by:

Filter by Authors

Implementing Regulations
Prop 65 Made Simple


Prop 65 Appellate Opinions

Proposition 65 Law Firms and Experts

            List Your Company Now!


Prop 65 Chemicals
Proposition 65 Chemical List 
Safe Harbor Levels
Chemicals Under Consideration


Proposition 65 Handbook 2013 Edition
The Proposition 65 Handbook - 2017 Edition is available for immediate shipment.
To learn more about the latest edition of this indispensable desk reference    
click here.

Terms Of UsePrivacy StatementCopyright 1987 - 2017 Cornerstone Publishing, LLC