Where It Comes From
Applied as sprays or granules; it binds to soil, breaks down slowly, and can move with runoff to streams [1].
How You Are Exposed
Mixing/applying products, drift to nearby areas, contact with recently treated turf, and small food residues; well contamination is uncommon when labels are followed [1][2].
Why It Matters
Low acute toxicity to people but can irritate skin/eyes; high-dose animal studies show liver and blood effects. EPA has not identified dietary or residential risks of concern when used as directed [1][2].
Who Is at Risk
Pesticide handlers and field/landscape workers; children playing on treated areas before sprays dry; people near treated fields if drift occurs [1].
How to Lower Your Exposure
Follow label directions and reentry times; wear gloves, long sleeves, and eye protection; keep kids and pets off treated areas until dry; avoid spraying near water; wash hands after outdoor work; rinse or peel produce [1][2].
References
- [1]U.S. Environmental Protection Agency (EPA), Office of Pesticide Programs. Oryzalin: Registration Review/Human Health and Ecological Risk Assessments and Reregistration materials.
- [2]World Health Organization/Food and Agriculture Organization (WHO/FAO), Joint Meeting on Pesticide Residues (JMPR). Oryzalin toxicology and residue evaluations.