Skip to main content
U.S. flag

An official website of the United States government

Here’s how you know

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

HTTPS

Secure .gov websites use HTTPS
A lock (LockA locked padlock) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

    • Environmental Topics
    • Air
    • Bed Bugs
    • Chemicals and Toxics
    • Climate Change
    • Emergency Response
    • Environmental Information by Location
    • Environmental Justice
    • Greener Living
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Pesticides
    • Radon
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Guidance
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • EPA Administrator
    • Organization Chart
    • Staff Directory
    • Planning, Budget, and Results
    • Jobs and Internships
    • Headquarters Offices
    • Regional Offices
    • Lab and Research Centers
Related Topics:
  • Emergency Planning and Community Right-to-Know Act (EPCRA)
Contact Us

Separate releases of the same hazardous substance

If a number of releases of the same hazardous substance are occurring at several locations at the same time at a facility (e.g., through leaks in pipes or valves), are multiple reports required?

All releases of the same substance from a single facility should be aggregated to determine whether an RQ has been released from the facility into the environment. However, there may be a case where releases occurring at different facilities at a single contiguous plant or installation on contiguous grounds under common ownership cannot be aggregated to determine if an RQ has been released. If the release from each facility was greater than or equal to an RQ, multiple reports would be required. However, these reports may be made in a single call to the National Response Center. The definition of "facility" under CERCLA section 101(9) is key to an evaluation of CERCLA reporting requirements. For example, as applied to the use of ethylene glycol during aircraft de-icing, there may be releases occurring at different facilities but at a single contiguous plant or installation on contiguous grounds under common ownership. The facility arguably may include the truck applying the de-icer, the aircraft to which the de-icer is applied, the entire airport, and/or other entities, depending on individual circumstances.

Contact Us to ask a question, provide feedback, or report a problem.
United States Environmental Protection Agency

Discover.

  • Accessibility
  • Budget & Performance
  • Contracting
  • EPA www Web Snapshot
  • Grants
  • No FEAR Act Data
  • Plain Writing
  • Privacy
  • Privacy and Security Notice

Connect.

  • Data.gov
  • Inspector General
  • Jobs
  • Newsroom
  • Open Government
  • Regulations.gov
  • Subscribe
  • USA.gov
  • White House

Ask.

  • Contact EPA
  • EPA Disclaimers
  • Hotlines
  • FOIA Requests
  • Frequent Questions

Follow.

Last updated on May 3, 2021