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Hazardous Materials / LEPC

General Overview
The Maricopa County Local Emergency Planning Committee (MCLEPC) brings together local governments, communities, academia, and industries as a resource for enhancing hazardous materials preparedness. Local governments are responsible for the integration of hazardous materials planning and response within their jurisdictions. The committee serves as a focal point for information and discussion about planning for emergencies involving hazardous substances, as required under Public Law 99-499, the Superfund Amendments and Reauthorization Act of 1986 (SARA Title III), also known as the Emergency Planning and Community Right-to-Know Act (EPCRA). The MCLEPC’s responsibilities include developing, training, and testing a comprehensive emergency response plan for Maricopa County; developing procedures by which regulated facilities notify the LEPC in accordance with EPCRA; developing procedures for addressing requests from the public under the right-to-know provisions of EPCRA; and giving public notice of committee activities. The Maricopa County LEPC allows the public to review and comment on the Maricopa County Hazardous Materials Response Plan at its meetings. For more information about EPCRA or the MCLEPC’s activities, call 602-273-1411 or email us at

For information about filing the annual Chemical Inventory Report Form (Tier II Report) and chemical spill reporting, visit the Arizona Emergency Response Commission website at or send an email to
If a reportable release of an extremely hazardous substance or a hazardous substance, as designated by the EPA, occurs at a facility, the facility owner/operator/emergency coordinator must immediately notify the following agencies:

  • The local fire department through 911 or other appropriate number if emergency response is required.
  • The Maricopa County Local Emergency Planning Committee at 602-273-1411 (24-hour number), if there is a potential for off-site release.
  • The Arizona Emergency Response Commission through the Arizona Department of Environmental Quality Emergency Response Unit, 602-771-2330 (24-hour number).
  • If reporting a CERCLA regulated substance, call the National Response Center at 800-424-8802 (24-hour number).
The facility owner/operator/emergency coordinator must provide contact information, incident location information and the following release information: chemical, quantity released, time and duration of the release, medium or media into which the release occurred, whether there was an off-site release, source and cause of the incident, and known or anticipated health risks. If reporting a transportation release, carrier/shipper information should also be included. In addition, an accurate written follow-up report of the incident must be submitted to the Arizona Emergency Response Commission and the MCLEPC within thirty days after the reportable release. This report should include actions taken to respond to and contain the release and any known or anticipated acute or chronic health risks associated with the release. If appropriate, advice regarding medical attention necessary for exposed individuals and measures that have been or will be taken at the facility to avoid a recurrence of similar releases should also be included.
After additional information becomes known, the owner or operator must update the notice in writing within seven calendar days following discovery or development of the information. The Maricopa County LEPC will review and approve the follow-up report and may request further information if it feels the information provided was insufficient.

Public Access and Availability of EPCRA Information
Under the Emergency Planning and Community Right-to-Know Act (EPCRA), any person may obtain chemical information with respect to a specific facility by submitting a written request to the Commission or the Committee.
Arizona State Emergency Response Commission
Executive Director
1110 W. Washington St
Phoenix, Arizona 85007
Telephone: (602) 771-2330 | (800) 234-5677

Maricopa County LEPC
LEPC Coordinator
5630 E. McDowell Road
Phoenix, Arizona 85008
Telephone: (602) 273-1411

The requestor must provide the facility name and address and must also indicate the type of information being requested such as: Chemical Inventory, Material Safety Data Sheet, or Chemical Spill Information. The requestor must provide their name, address, organization and phone number. If the information is to be reproduced, the requestor must indicate if the information requested will be used for commercial or noncommercial purposes, as cost recovery fees apply and are calculated differently. The information can also be made available for inspection in the department’s office. The department, as administrative agency for the LEPC, must permit access to data within a reasonable amount of time after the request is made, so long as the access does not disrupt public business.

The intention of EPCRA is to increase the public's knowledge of and access to information about the presence of hazardous chemicals in their local communities, including chemical releases to the land, air, and water. Each emergency response plan, materials data sheet, chemical list, chemical inventory report, follow up emergency notice, or the LEPC emergency plan are all available for inspection and/or copying during normal business hours. A request to inspect and/or copy these EPCRA documents must be submitted in writing.

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Maricopa County presents this information as a service to the public. It has made every effort to ensure that the information contained here is accurate. It makes no warranties or guarantees, nor may anyone assume any warranties or guarantees regarding the accuracy or reliability of its content or of other information to which there is a link. Assessing accuracy and reliability of information is the sole responsibility of the user. Maricopa County shall not be liable for errors contained here or for any damages in connection with the use of the information contained here. Maricopa County does not endorse the content found on non-Maricopa County websites accessed via hyperlink. Further, the e-mail address and any other information found here shall not be used for unsolicited advertising, marketing, or other commercial purposes.
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