Active Ingredient: Methidathion
Human Health Risk Assessment and Mitigation
Documents and Activities
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Overview
- Name: Methidathion
- DPR Chemical Code: 1689
- Chemical Class: Organophosphate
- Pesticide Types Registered: No actively registered products
- Fumigant: No
- California Restricted Material: Yes
- Toxic Air Contaminant (TAC): Yes
- Volatile Organic Compound (VOC) Regulations: No
- Potential Groundwater Contaminant: No
- Reevaluation: Not applicable
Risk Characterization Documents (RCDs) estimate the nature and likelihood of adverse health effects in humans who may be exposed to pesticides.
NOTE: REGISTRATION OF METHIDATHION WAS CANCELLED BY US EPA IN 2014
- Toxic Air Contaminant (TAC) Assessment
- May 2007 – Director's Proposed Decision (PDF)
- April 2007 – Scientific Review Panel's Findings (PDF)
- February 2007 – Executive Summary (PDF)
- February 2007 – Volume I: Health Risk Assessment (PDF)
- February 2007 – Volume II: Exposure Assessment (PDF)
- February 2007 – Volume III: Environmental Fate (PDF)
- November 2006 – Office of Environmental Health Hazard Assessment's Findings (PDF)
Other Documents
- August 2006 – Alternate Methidathion Application Air Concentration Estimates (PDF)
- September 2002 – Effects of Mitigation Measures Proposed in Methidathion IRED on Exposure Estimates (PDF)
- May 1994 – Airborne Concentrations of Methidathion and Methidaoxon in Central Tulare County from Sampling Conducted in June and July 1991
- September 1988 – A Summary of Occupational Illnesses and Injuries Due to Coincidental Pesticide Exposure as Reported by Physicians in California in 1986 (PDF)
- February 1984 – A Degradation Study of Dislodgeable Methidathion Residue on Orange Foliage in Fresno County (PDF)
- February 1984 – A Degradation Study of Dislodgeable Methidathion Residue on Orange Foliage in Tulare County, California During May - June 1983 (PDF)
- December 1983 – Potential Exposure of Loader/applicators to Methidathion (Supracide) During Applications to Citrus in Riverside County, California, in 1982 (PDF)
- 1976 – A Study of Foliar Residues Following Application of Supracide to Orange Trees, Riverside County, June 1975, and Kern County, July 1975 (PDF)
- December 2014 – Completion of Mitigation (PDF)
- December 2012 – Methidathion; Cancellation Order for Pesticide Registrations (PDF)
Enforcement Letters
- 2016 – A Comparison of ToxCast Test Results with In Vivo and other In Vitro Endpoints for Neuro, Endocrine, and Developmental Toxicities: A Case Study Using Endosulfan and Methidathion (PDF)
- 2015 – A Comparison of ToxCast Test Results with In Vivo and other In Vitro Endpoints for Neuro, Endocrine, and Developmental Toxicities: A Case Study Using Endosulfan and Methidathion
- 2014 – A Comparison of ToxCast In Vitro Testing with In Vivo Endpoints for Endocrine and Developmental Toxicities: A Case Study Using Endosulfan and Methidathion (PDF)
- Pesticide Product Database
- Human Health Assessment Branch Memos
- Human Health Assessment Branch Publications, Posters/Abstracts and Presentations
- Worker Health and Safety Reports and Memos
- Environmental Monitoring Branch Publications
- Air Monitoring Network
- Pesticide Use Reporting (PUR)
- California Pesticide Illness Query (CalPIQ)
- Environmental Justice (EJ)
- OEHHA Proposition 65 Information
- U.S. EPA Pesticide Chemical Search
- PubChem-Chemical Information
For document retrieval, please submit a request at our Public Records Portal (NextRequest).
For content questions, contact:
Christine Herrera
Worker Health and Safety Branch
1001 I Street, P.O. Box 4015
Sacramento, CA 95812-4015
Phone: (916) 445-4261
E-mail: Christine.Herrera@cdpr.ca.gov
Brenna McNabb
Pesticide Registration Branch
1001 I Street, P.O. Box 4015
Sacramento, CA 95812-4015
Phone: (916) 445-0179
E-mail:
Brenna.McNabb@cdpr.ca.gov