- Skip Navigation

Note: This message is displayed if (1) your browser is not standards-compliant or (2) you have you disabled CSS. Read our Policies for more information.

Compliance and Technical Assistance Program


CTAP is your one-stop shop for environmental regulatory compliance needs. Staff with experience in all environmental programs are ready to provide technical and confidential compliance assistance on a wide array of environmental topics.

Upcoming Compliance Due Dates

  • March 1:
    • HC-500 Hazardous Inventory Fee due for previous year’s report of Chemical Inventory (Tier II Report). This form is no longer mailed to taxpayers.
    • Annual Manifest Report due every year for Small Quantity Generators and Biennial manifest report is due every odd numbered calendar year (e.g., 2015) for Large Quantity Generators and Treatment, Storage, Disposal facilities.
    • Tier II Reports due to the State Emergency Response Commission, the Local Emergency Planning Committee (LEPC), and Local Fire Department.
  • March 15:
    • NPDES Annual Bills (Wastewater Treatment as well as Storm Water Permits) are due for every active permit as of January 1 of the current year (except General Permit Coal Mines which are due on their anniversary date), or first quarter payment due if paying Annual Bill in quarterly installments. 10% late fees apply after this date.
    • FESOP Air Permit annual fees are due 30 days after the invoice is generated. All invoices are generated by the 15th of the previous month.
  • March 31:
    • Annual Green House Gas Reports are due to U.S. EPA if your facility is part of the 41 source categories in 40 CFR 98 (otherwise report is due September 28)
      • Note: There is no need to submit the GHG Report to IDEM.
    • Annual Water Withdraw Report is due for facilities that have the capability of withdrawing more than one hundred thousand (100,000) gallons of ground water, surface water, or ground and surface water combined in one (1) day.
  • April 1:
    • Annual Report due for delegated and non-delegated water Pretreatment Programs.
  • April 15:
  • April 20:
    • HW-020 Hazardous Waste Disposal Tax Return Form and Fee due for disposal of hazardous waste onsite through underground injection during the previous quarter.
  • April 28:
    • Quarterly Non-Compliance Report due for delegated water Pretreatment Programs (unless otherwise permitted to submit report in May).
  • April 30:
    • Air Quarterly Deviation and Compliance Monitoring Report, due for January through March. Check your permit to determine if you are on a quarterly or semi-annual reporting schedule.
    • Quarterly Air Permit reports (e.g., usage reports) due for January through March.

Complete List of Compliance Due Dates

Featured Topics

Need to Obtain a Replacement Bucket for Automotive Mercury Switches?

To help reduce the amount of mercury in recycled steel and meet Indiana law, IC 13-20-17.7, requiring motor vehicle recyclers to remove mercury switches for end of life vehicles. Instructions as to collecting, storing, transporting, and recycling or properly disposing of mercury switches is provided to vehicle recyclers upon enrolling in the National Vehicle Mercury Switch Recovery Program through End of Life Vehicles Solutions (ELVS).

End of Life Vehicle Solutions (ELVS) contractor, EQ Industrial Service, Inc. (EQ), who provides auto salvage recyclers with shipping buckets for automotive mercury switches, has relocated its mercury switch buckets operations to a new location. All mercury switch buckets will now be shipped to a new location in Detroit. The United Parcel Service (UPS) will forward any buckets using the old pre-paid shipping labels to the new location. EQ notified auto salvage recyclers of the change in address and phone number. They will also send new shipping labels with the replacement buckets. The new EQ address and contact information is as follows:

2000 East Ferry Street
Detroit, MI 48211

  • Phone: (800) 495-6059
  • Email: elvsbuckets at

In the future, for all of your mercury switch bucket needs please contact EQ at (800) 495-6059 or “elvsbuskets at”.

Greenhouse Gas (GHG) Permitting – Guidance Available

Due to questions raised about air permitting for sources of greenhouse gas emissions regarding the June 23, 2014, U.S. Supreme Court decision in Utility Air Regulatory Group v. Environmental Protection Agency, 12-1146, the Indiana Department of Environmental Management’s (IDEM) Office of Air Quality (OAQ) has provided a guidance document to assist permittees in understanding what the circumstances are in which permitting will be needed for greenhouse gas emissions.

Pursuant to the U.S. Supreme Court ruling and the U.S. Environmental Protection Agency (EPA) guidance, IDEM will continue to require new sources or modifications to existing sources for which the new source or modification to an existing source is subject to Prevention of Significant Deterioration (PSD)/Best Available Control Technology (BACT) requirements based on the emission of conventional pollutants (“anyway sources”), to utilize BACT for greenhouse gas emissions if the potential to emit greenhouse gas emissions from the new source is equal to or greater than 75,000 tons per year of carbon dioxide equivalent (CO2e), or if the modification results in a greenhouse gas emissions increase and a net greenhouse gas emissions increase equal to or greater than 75,000 tons per year CO2e and greater than zero on a mass basis, until the U. S. EPA promulgates a revised threshold.

Pursuant to the U.S. Supreme Court Ruling and the U.S. EPA guidance, IDEM will not enforce greenhouse gas BACT limitations and supporting terms and conditions for sources/modifications which implemented BACT because of greenhouse gas emissions only, and did not trigger BACT for emissions of conventional pollutants. Such sources may apply to have their permits modified to remove the greenhouse gas BACT requirements.

Please refer to the OAQ’s Guidance Document for the complete statement of IDEM’s position.

Operating a Wood-Fired Boiler?

An area or major source of Hazardous Air Pollutants (HAP) utilizing a wood-fired boiler may be subject to the Boiler Maximum Achievable Control Technology (MACT) rules which may require stack testing, energy assessments, and boiler tune-up requirements.

A permitted source should evaluate the Potential to Emit (PTE) that was utilized to establish their air permit as it may need to be altered depending on the type of wood products combusted. The emission factor established for clean wood was most likely used to determine the PTE for an air permit issued to a facility utilizing a wood-fired boiler. Therefore, if a permitted source has been approved to combust clean wood but would like to combust or is combusting wood waste, the PTE should be re-evaluated to assist in gaining approval from the Indiana Department of Environmental Management (IDEM) and to update the air permit with correct information.