Chemigation is the practice of applying agrichemicals to cropland using an irrigation system to distribute both the water and chemical. Chemigation applicators must be certified before applying chemicals. Certification is good for 4 years. Once certified, applicators need to apply for a permit from their local NRD. NRDs will issue the permit to chemigate. Inspections are required on all new chemigation permits, and renewal permits are inspected every 3 years. Visit the links below for more information on chemigation.