Maryland
For Maryland, general hazardous chemical threshold is 10,000 pounds; ehs threshold is 500 pounds or the EPA established TPQ for that chemical, whichever is lower; filing deadline is March 1st, verified against its source on 2026-09-22.
- State
- Maryland
- General hazardous chemical threshold
- 10,000 pounds verified
- EHS threshold
- 500 pounds or the EPA established TPQ for that chemical, whichever is lower verified
- Filing deadline
- March 1st verified
What the source says
For any hazardous substance, the reporting threshold is 10,000 pounds.
— mde.maryland.gov, retrieved 2026-09-22
Where each value comes from
This source states these in separate places, so each value is shown with the passage that states it.
General hazardous chemical threshold
For any hazardous substance, the reporting threshold is 10,000 pounds.
EHS threshold
For an EPCRA Section 302 EHS the reporting threshold is 500 pounds or the EPA established TPQ for that chemical, whichever is lower.
Filing deadline
The Section 312 inventory is due March 1st each year and covers the materials at the facility during the preceding calendar year.
— all from mde.maryland.gov, retrieved 2026-09-22
Source
- mde.maryland.govhttps://mde.maryland.gov/programs/Businessinfocenter/CommunityRightToKnow/Pages/index.aspx