California Tier II reporting: how and where to file
In California, Tier II is met through the state's Hazardous Materials Business Plan program, filed electronically in the California Environmental Reporting System (CERS). Compliance questions go to the local CUPA. The federal inventory is due to the SERC, the LEPC and the local fire department annually on March 1; the Business Plan filing in CERS is how California meets it.
From California SERC, staffed by the Governor's Office of Emergency Services (Cal OES), with the local Unified Program Agencies, read on the state's own page · October 28, 2026
What California asks for
Each point is followed by the words of the state's own page.
How to file
In California, Tier II is met through the state's Hazardous Materials Business Plan program, filed electronically in the California Environmental Reporting System (CERS). Compliance questions go to the local CUPA.
“The federal equivalent to the Business Plan program is the EPCRA 311/312 reporting requirements.” source
“This requirement is achieved through compliance with the Business Plan program. Contact your local CUPA for compliance and questions.” source
“Submissions are made electronically via the California Environmental Reporting System (CERS) .” source
Deadline
The federal inventory is due to the SERC, the LEPC and the local fire department annually on March 1; the Business Plan filing in CERS is how California meets it.
“and the local fire department annually on March 1st” source
Who gets the report
California runs EPCRA through Cal OES, the SERC, the LEPCs and 83 Unified Program Agencies.
“83 Unified Program Agencies (UPAs)” 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 California'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.
California Tier II FAQ
How do I file Tier II in California?
In California, Tier II is met through the state's Hazardous Materials Business Plan program, filed electronically in the California Environmental Reporting System (CERS). Compliance questions go to the local CUPA.
When is Tier II due in California?
The federal inventory is due to the SERC, the LEPC and the local fire department annually on March 1; the Business Plan filing in CERS is how California meets it.
Who gets the Tier II report in California?
California runs EPCRA through Cal OES, the SERC, the LEPCs and 83 Unified Program Agencies. 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.
More on California
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.
- Alabama
- Colorado
- Connecticut
- Delaware
- Florida
- Georgia
- Hawaii
- Illinois
- Indiana
- Iowa
- Kansas
- Louisiana
- Massachusetts
- Mississippi
- Michigan
- Missouri
- Montana
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- North Carolina
- North Dakota
- Oklahoma
- Oregon
- Pennsylvania
- South Dakota
- Texas
- Vermont
- Virginia
- Washington
- Wisconsin
- Wyoming
- Maine
- Alaska
- Arizona
- Arkansas
- District of Columbia
- Idaho
- Kentucky
- Maryland
- Minnesota
- Nebraska
- New York
- Ohio
- Rhode Island
- South Carolina
- Tennessee
- Utah
- West Virginia
Sources
- www.caloes.ca.gov/individuals-families/state-emergency-response-commission
- www.epa.gov/epcra/state-tier-ii-reporting-requirements-and-procedures
- ecfr.gov/current/title-40/part-370
California'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 California SERC, staffed by the Governor's Office of Emergency Services (Cal OES), with the local Unified Program Agencies 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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