A plain-English walkthrough of getting licensed in Colorado — which CDA license fits your work, the General Core and category exams, what it costs, and how to study and pass. Pesticide licensing in Colorado is run by the Colorado Department of Agriculture (CDA) under the Pesticide Applicators' Act.
QS and CO candidates pass the General Core exam — laws and regulations, pesticide safety, and use — plus at least one category exam (Agricultural Insect, Turf, Residential/Commercial, and more). CDA partners with Metro Institute for secure online exams at proctor locations across Colorado; you apply and schedule through the Metro Institute portal, and passing scores stay valid for one year while you complete licensing.
The license fee is $100 for a QS or CO and $75 for a private applicator, each valid three years; Metro Institute exam fees are separate, and CDA moved to a fully online licensing portal. Renew with continuing education credits — core credits in laws and pesticide families plus one or two per category — or by retesting. Late reinstatement adds $100 (QS/CO) or $20 (private). Colorado issues reciprocal private and Certified Operator licenses to applicators licensed elsewhere for the unexpired term of their home license, but does not reciprocate at the Qualified Supervisor level. Confirm current fees with CDA.
Colorado QS and CO licenses run three years and expire on your BIRTH DATE, not the issue date — a detail easy to miss. Renew by earning continuing-education credits before expiration: 7 core credits (2 in laws and regulations, plus 1 each in pesticide families, applicator safety, public safety, environmental protection, and pesticide use) plus 1 category credit per licensed category — 2 credits for turf, ornamental, and residential/commercial pest control. Private applicators owe only the 7 core credits (plus a fumigation or aerial endorsement if held). There is no grace period for the credits themselves — fall short and you retest — but a lapsed license can be reinstated up to 180 days after expiration with a penalty ($100 QS/CO, $20 private). Confirm your category credits with CDA before your birthday cutoff.
Both pass the same General Core and category exams. A Qualified Supervisor also documents field experience and can work without supervision, recommend controls, and supervise others; a Certified Operator has no experience requirement and works under a QS.
The license fee is $100 for a Qualified Supervisor or Certified Operator and $75 for a private applicator, valid three years. Metro Institute exam fees are separate. Confirm current fees with CDA.
CDA partners with Metro Institute for secure online exams at proctor locations across the state. Apply and schedule through the Metro Institute portal; passing scores are valid for one year while you complete your license application.
Yes, for private applicators and Certified Operators licensed in another jurisdiction — issued for the unexpired term of the home-state license. Colorado does not reciprocate at the Qualified Supervisor level.
Colorado Department of Agriculture (CDA) administers pesticide applicator certification in Colorado. Official requirements, applications, and scheduling come from the agency directly at https://ag.colorado.gov/plants/pesticides.
Start with the National CORE material — the safety, label, and law foundation every state exam draws on. The free practice exams, flashcards, and study guides on this page mirror the real exam format: timed, scored, with a plain-English rationale on every question.
