EPCRA §312DC

District of Columbia Tier II reporting: how and where to file

Every Tier II report goes through HSEMA's online Tier II Manager; preparers complete the new-user registration online first. The inventory is due March 1 each year and covers the materials at the facility during the preceding calendar year.

From District of Columbia Homeland Security and Emergency Management Agency (HSEMA), which serves as both SERC and LEPC, read on the state's own page · October 28, 2026

What District of Columbia asks for

Each point is followed by the words of the state's own page.

How to file

Every Tier II report goes through HSEMA's online Tier II Manager; preparers complete the new-user registration online first.

“The District of Columbia requires all Tier II reports be submitted through the HSEMA Online Tier II Manager database .” source

“Tier II report preparers must complete New User Registration online before submitting reports.” source

Deadline

The inventory is due March 1 each year and covers the materials at the facility during the preceding calendar year.

“The Section 312 inventory is due March 1st each year and covers the materials at the facility during the preceding calendar year.” source

State thresholds

DC uses the federal thresholds: 10,000 pounds; for an extremely hazardous substance, 500 pounds or the threshold planning quantity, whichever is lower.

“For any hazardous substance, the reporting threshold is 10,000 pounds. For an EPCRA Section 302 EHS the reporting threshold is 500 pounds or the Environmental Protection Agency (EPA) established TPQ for that chemical, whichever is lower.” source

Who gets the report

HSEMA is both the SERC and the LEPC for the District.

“Within the District of Columbia, the Homeland Security and Emergency Management Agency (HSEMA) functions as both the SERC and LEPC.” source

State-specific rule

The Section 311 list of chemicals (or the SDSs) is due within 60 days of first exceeding a threshold.

“The Section 311 chemical list must be submitted within 60 days of the first date that the threshold for the hazardous chemical or EHS is exceeded.” 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 10,000 lb figure is the general case: at a retail gas station the thresholds are 75,000 gallons of gasoline and 100,000 gallons of diesel fuel (all grades combined), and they apply only to fuel in tanks entirely underground that met every applicable underground storage tank requirement at all times during the preceding calendar year (40 CFR 370.10(a)(2)(ii) and (iii)); otherwise the general threshold applies. The report covers the previous calendar year and is due March 1 (40 CFR 370.45). Below every threshold, a request still has to be answered: when your LEPC, SERC or fire department asks for Tier II information, the threshold is zero and the information is due within 30 days (40 CFR 370.10(b), 370.45(b)). Where District of Columbia'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.

Start free Check your chemicals against the thresholds

District of Columbia Tier II FAQ

How do I file Tier II in District of Columbia?

Every Tier II report goes through HSEMA's online Tier II Manager; preparers complete the new-user registration online first.

When is Tier II due in District of Columbia?

The inventory is due March 1 each year and covers the materials at the facility during the preceding calendar year.

Does District of Columbia use the federal Tier II thresholds?

DC uses the federal thresholds: 10,000 pounds; for an extremely hazardous substance, 500 pounds or the threshold planning quantity, whichever is lower.

Who gets the Tier II report in District of Columbia?

HSEMA is both the SERC and the LEPC for the District. The federal rule is that the report reaches the LEPC, the SERC and the fire department with jurisdiction (42 U.S.C. 11022(a)(1)); in a state that takes the report in one system and passes it on, that system can meet the rule, and the state's own steps above say which applies.

Tier II in other states

These 51 pages (the 50 states and DC) quote each state's own page or EPA's page of state procedures. For a territory, EPA's State Tier II Reporting Requirements and Procedures names the agency and the filing method.

Sources

District of Columbia's requirements read on the state's own page on October 28, 2026; 40 CFR part 370 read on the eCFR on September 26, 2026. States change portals and fees; confirm with District of Columbia Homeland Security and Emergency Management Agency (HSEMA), which serves as both SERC and LEPC before you file. General guidance, not legal advice.

Keep the chemical list behind your Tier II report current

Tier II is an EPCRA filing to your state and local agencies, not an OSHA citation. The same chemical inventory feeds your SDS binder and the report, so keep it in one place.

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