Delaware Tier II reporting: how and where to file
File online in the Tier II Manager system; one submission there meets the state and federal reporting requirements. Due March 1, covering the previous calendar year. An annual fee may apply, based on the number and type of substances reported, payable online in Tier II Manager.
From Delaware EPCRA Reporting Program, Department of Natural Resources and Environmental Control (DNREC), read on the state's own page · September 26, 2026
What Delaware asks for
Each point below is followed by the state's own words, so you can check it against the source.
How to file
File online in the Tier II Manager system; one submission there meets the state and federal reporting requirements.
“in Delaware by submitting the report through the online Tier II Manager TM System , you fulfill your reporting requirements under both state and federal law.” source
Deadline
Due March 1, covering the previous calendar year.
“Tier II Hazardous Chemical Inventory reports are due annually by March 1 covering activities at the facility during the previous calendar year.” source
Fees
An annual fee may apply, based on the number and type of substances reported, payable online in Tier II Manager.
“Facilities submitting Hazardous Chemical Inventory forms may be subject to an annual fee based upon the number and type of substances reported.” source
“Reporting fees can be paid online within the Tier II Manager TM system.” source
State thresholds
Delaware's thresholds are far below the federal ones: 55 gallons or 500 pounds, whichever is lower, for hazardous chemicals, and 55 gallons, 500 pounds or the TPQ, whichever is lower, for extremely hazardous substances.
“Hazardous Chemicals - 55 gallons or 500 pounds, whichever is lower.” source
“Extremely Hazardous Substances - 55 gallons, 500 pounds, or the Threshold Planning Quantity (TPQ), whichever is lower.” source
The federal rule underneath
EPCRA section 312 applies to a facility that the OSHA HazCom Standard requires to keep an SDS for a hazardous chemical present at any one time at or above 10,000 lb, or at or above 500 lb or its threshold planning quantity, whichever is lower, for an extremely hazardous substance (40 CFR 370.10(a)). The report covers the previous calendar year and is due March 1 (40 CFR 370.45). Where Delaware's rules above are stricter, they apply on top.
The full federal picture, Tier I versus Tier II, counting and penalties, is on the EPCRA Tier II hub. The list that feeds it is the chemical inventory.
HazComFast keeps each jobsite's chemical quantities next to its safety data sheets and exports the Tier II data as an Excel workbook, a CSV file and a PDF summary.
Delaware Tier II FAQ
How do I file Tier II in Delaware?
File online in the Tier II Manager system; one submission there meets the state and federal reporting requirements.
When is Tier II due in Delaware?
Due March 1, covering the previous calendar year.
Does Delaware charge a Tier II fee?
An annual fee may apply, based on the number and type of substances reported, payable online in Tier II Manager.
Does Delaware use the federal Tier II thresholds?
Delaware's thresholds are far below the federal ones: 55 gallons or 500 pounds, whichever is lower, for hazardous chemicals, and 55 gallons, 500 pounds or the TPQ, whichever is lower, for extremely hazardous substances.
More on Delaware
Tier II in other states
Sources
- dnrec.delaware.gov/waste-hazardous/emergency-response/community-right-to-know/reporting-requirements/
- ecfr.gov/current/title-40/part-370
Delaware's requirements read on the state's own page on September 26, 2026; 40 CFR part 370 read on the eCFR the same day. States change portals and fees; confirm with Delaware EPCRA Reporting Program, Department of Natural Resources and Environmental Control (DNREC) before you file. General guidance, not legal advice.
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