Tier II Chemical Reporting in Arizona: Who Files & How
Short answer: if your Arizona facility stores a hazardous chemical at or above its EPCRA reporting threshold — generally 10,000 pounds, or as low as 500 pounds for an Extremely Hazardous Substance — you must file an annual Tier II chemical-inventory report by March 1, covering the prior calendar year. It goes to your State Emergency Response Commission (SERC), your Local Emergency Planning Committee (LEPC), and your local fire department. In Arizona you file in myDEQ with the Arizona Department of Environmental Quality (ADEQ) for the Arizona SERC, attach a site map, and pay a filing fee that ADEQ is moving to raise. The hardest part is compiling an accurate inventory with quantities — which is exactly what SDSentry ($24 per location per month) keeps current for you year-round. Here is how Tier II works in Arizona.
Free, no signup: the SDS binder builder at sdsentry.0xpi.com/sds-binder.html turns a pasted list of the products you keep on site into one printable index of their current safety data sheets.
What Tier II is (and isn't)
Tier II is the annual chemical-inventory report required under Section 312 of the Emergency Planning and Community Right-to-Know Act (EPCRA). Its purpose is to tell fire departments and emergency planners what hazardous chemicals are stored at your facility, in what quantities, and where, so responders know what they are walking into. It is a separate obligation from OSHA Hazard Communication — the same chemicals on your shelves, but a different law and a different audience. Meeting your HazCom duties does not satisfy Tier II, and vice versa.
Who has to file in Arizona
The trigger is federal and applies the same way in Arizona as everywhere else. You must file Tier II if any hazardous chemical for which you are required to keep a safety data sheet is present at your facility at or above its reporting threshold at any point during the year:
- 10,000 lbs for most hazardous chemicals (those that require an SDS).
- 500 lbs — or the chemical's Threshold Planning Quantity, whichever is lower — for Extremely Hazardous Substances (EHSs) on EPA's list.
Quantities are based on the maximum amount present at any one time, aggregated across the facility. A small clinic or shelter often stays under these limits, but bulk propane or diesel tanks, stored fuel, pool and spa chemicals, fertilizer, or a large supply of a single disinfectant can push you over — and EHS thresholds are low enough that a modest amount of the wrong chemical can trigger a report.
Where Arizona facilities submit
EPCRA sends every Tier II report to three places: your State Emergency Response Commission (SERC), your Local Emergency Planning Committee (LEPC), and your local fire department.
Arizona's Tier II program is run by the Arizona Department of Environmental Quality (ADEQ) for the Arizona State Emergency Response Commission (AZSERC), and reports are completed and certified in myDEQ. The report includes your Facility Emergency Response Plan, and site maps are required: “The requirement for site maps is now mandatory for all facilities submitting Tier II reports in the myDEQ Tier II platform.”
Local copies depend on your fire department. ADEQ: “If the agency with jurisdiction over your facility accepts electronic reporting, you do not have to mail or email copies of your Tier II report to them or the Arizona State Emergency Response Commission (AZSERC).” ADEQ publishes the list of participating agencies; if yours is not on it, send your copies. Facilities on Gila River Indian Community land can use the online system but must still send hard copies to the GRIC Office of Emergency Management. Start from ADEQ's Tier II reporting page.
State systems and instructions can change year to year, so confirm current details with ADEQ before you file.
The deadline
ADEQ: “Tier II reporting is due annually, starting on January 1 and ending on March 1.”
Are there Arizona state fees?
Yes. ADEQ: “Each owner or operator of a facility required to file a Tier II Report is subject to a $75 filing fee for the first required facility report and an additional $20 fee for each additional required facility report, up to a maximum limit of $500 per annual reporting period (Arizona Administrative Code R18-18-107 B.1.).” You pay in myDEQ when you certify. Facilities reporting only chemicals under the Town of Gilbert Fire Department regulation are exempt from the state fee.
Expect a change: ADEQ has an active rulemaking to update these fees, “increasing fees and adjusting annual fee caps,” to address shortfalls in the Emergency Response Fund. Check ADEQ's rulemaking page before you pay.
What to have ready before you file
The report itself is mostly a structured list. What slows people down is assembling accurate underlying data. Before you start, have on hand:
- A complete chemical inventory for the location, with the product name and chemical identity for each item.
- The maximum quantity on site during the year and the average daily quantity, with units.
- Storage details — container type, pressure, temperature, and the specific location or building.
- Hazard information from each product's safety data sheet.
- Facility identifiers, emergency contacts, and (where required) latitude and longitude.
If you keep a current SDS library and a per-location inventory with quantities throughout the year, the February scramble largely disappears. See our guide on building a chemical inventory from scratch for a starting point.
How SDSentry helps
SDSentry tracks quantity and unit per item in your per-location inventory, flags items over a threshold you set, and exports an EPCRA Tier II CSV so your preparer is not rebuilding the inventory by hand each February. It keeps a current SDS on file for every product, which is where most of the hazard and storage details on the report come from. It will not submit the report for you — you still file through myDEQ — but it turns the worst part, compiling and maintaining the data, into a download. Pair it with our HazCom compliance checklist so your OSHA and EPCRA obligations stay covered at the same time.
Track inventory for Tier II — free trial
Frequently asked questions
Who do I send my Tier II report to in Arizona?
File and certify your Tier II report, with a site map, in ADEQ's myDEQ system for the Arizona SERC. If the fire department or LEPC with jurisdiction over your facility participates in electronic reporting, you do not have to send them copies; otherwise send them yourself.
When is the Tier II deadline in Arizona?
Between January 1 and March 1 each year for the previous calendar year.
What are the Tier II reporting thresholds?
You report if a hazardous chemical that requires a safety data sheet is on site at or above 10,000 pounds at any time during the year, or at or above 500 pounds — or the Threshold Planning Quantity, whichever is lower — for an Extremely Hazardous Substance. Quantities are the maximum amount present at any one time.
Is there a Arizona state fee for Tier II?
Yes. Under A.A.C. R18-18-107, ADEQ charges $75 for the first required facility report and $20 for each additional one, up to $500 per annual reporting period. ADEQ has an active rulemaking to increase the fees and adjust the caps, so check the current amount before paying.