National Response Center

1-800-424-8802
(For reportable quantity spills, or spills that affect a waters of the US)

Arizona Department of Environmental Quality Response Unit

ADEQ Reporting Form  (best in Chrome and Explorer)

602-771-2330 or (800) 234-5677 

(See their link for further information)

Pima County on-call

520-724-9301

(When County coordination or assistance is needed or anticipated)