Indiana Pesticide Record Keeping & Compliance
Indiana regulates commercial pesticide application through the Office of Indiana State Chemist (OISC) at Purdue University. Lawn care businesses need OISC licensing, must post treated lawns, and keep complete application records for at least two years.
Published July 31, 2026 · Last reviewed July 31, 2026
Record keeping in Indiana
Retention: 2 years. Indiana pesticide regulation runs through the Office of Indiana State Chemist (OISC), housed at Purdue University. Licensed commercial applicators must keep application records for at least two years, capturing the date and time, site, product and EPA registration number, rate and amount, and the applicator's name and license number.
Licensing: Commercial Applicator License, administered by Office of Indiana State Chemist (OISC).
Notification & posting rules
Indiana requires commercial lawn care applications to be posted with marker signs at the time of application, and customers must be given application information.
Frequently asked questions
How long must pesticide records be kept in Indiana?
At least two years for commercial applications. Records should capture the date and time, treated site, product and EPA registration number, rate and amount, and the licensed applicator.
Does Indiana require lawn posting after applications?
Yes — commercial lawn care applications require marker signs posted at the time of application, and customers must receive information about what was applied.
Who licenses pesticide applicators in Indiana?
The Office of Indiana State Chemist (OISC), based at Purdue University, licenses commercial applicators and registers pesticide businesses.
Educational summary, not legal advice — verify current requirements with Office of Indiana State Chemist (OISC).
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Related state guides
Compare record-retention and notification requirements in these states with similar compliance profiles:
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