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The U.S. EPA has developed and finalized a National Pollutant Discharge Elimination System (NPDES) Pesticide General Permit (PGP) for point source discharges from the application of pesticides to, over or near waters of the United States. Indiana is authorized by U.S. EPA to issue a PGP that meets all Clean Water Act (CWA) requirements of the federal permit but can be more stringent based on Indiana’s water quality standards for point source discharges to waters of the state.
IDEM’s PGP will regulate the application of biological and chemical pesticides used for mosquito and other flying insect pest control, aquatic weed and algae control, aquatic nuisance animal control and forest canopy pest control that results in a discharge to waters of the state.
Similar to all other state-issued General NPDES permits, a Notice of Intent (NOI) is required to be submitted for the PGP. Table 1 below, describes the specific pesticide uses along with the annual treatment area thresholds that are covered under the PGP. Most state and federal agencies and large companies such as utilities and railroads that apply pesticides will fall under the PGP.
Pesticide Uses Covered Under this General Permit:
Pesticide applications are regulated by the Office of the Indiana State Chemist (OISC). In most cases, the applicator is exempt if certified, licensed or has been issued a GN number by the OISC to apply pesticides. Other exemptions include research and development activities and persons who hold a permit from the Indiana Department of Natural Resources to apply pesticides.
The annual treatment area thresholds will exclude small-scale home pesticide applications and most small businesses as defined by Indiana law (IC 5-28-2-6) that perform pesticide applications. Agricultural pesticide applications to the land or terrestrial crops are not covered under this permit as well as agricultural storm water runoff.
Entities and applicators covered under the PGP will be expected to comply with the terms and conditions of the permit. The PGP will require all permittees to:
The NOI submittal date for all existing discharges from pesticide applications is November 1, 2012. For discharges beginning after November 1, 2012, an NOI must be submitted at least 10 days prior to commencement of the pesticide application.
If you have questions regarding IDEM’s Pesticide General Permit for point source discharges from the application of pesticides and would like to speak with a CTAP staff member please contact (800) 988-7901 or, via email, ctap at idem.in.gov. IDEM and U.S. EPA provide additional information about the PGP: