Where It Comes From
Spraying on rangeland, crops, and rights-of-way; it is persistent and mobile, reaching surface and groundwater via runoff and leaching [1][2].
How You Are Exposed
Drinking contaminated well water; spray drift or contact with treated vegetation; residues on food (generally low); mixing or applying at work [1].
Why It Matters
Short-term exposure may irritate eyes/skin or cause stomach upset; higher or repeated doses affected liver in animals. EPA’s drinking-water limit is 0.5 mg/L. Cancer evidence is inadequate/not classifiable [1][2].
Who Is at Risk
Pesticide applicators; people near treated land using private wells; children on recently treated areas; those with liver disease [1].
How to Lower Your Exposure
Respect re-entry intervals; keep kids/pets off until dry; test wells if near treated areas; use certified carbon or reverse-osmosis filters; avoid contaminated water for infant formula; rinse produce; wear protection when applying [1][3].
References
- [1]ATSDR. ToxFAQs for Picloram. Agency for Toxic Substances and Disease Registry.
- [2]EPA. National Primary Drinking Water Regulations: Table of Regulated Drinking Water Contaminants (Picloram MCL = 0.5 mg/L). U.S. Environmental Protection Agency.
- [3]CDC. A Guide to Drinking Water Treatment Technologies for Household Use. Centers for Disease Control and Prevention.