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
    • Cancer
    • Chemicals, Toxics, and Pesticide
    • Emergency Response
    • Environmental Information by Location
    • Health
    • Land, Waste, and Cleanup
    • Lead
    • Mold
    • Radon
    • Research
    • Science Topics
    • Water Topics
    • A-Z Topic Index
    • Laws & Regulations
    • By Business Sector
    • By Topic
    • Compliance
    • Enforcement
    • Laws and Executive Orders
    • Regulations
    • Report a Violation
    • Environmental Violations
    • Fraud, Waste or Abuse
    • About EPA
    • Our Mission and What We Do
    • Headquarters Offices
    • Regional Offices
    • Labs and Research Centers
    • Planning, Budget, and Results
    • Organization Chart
    • EPA History

Breadcrumb

  1. Home
  2. Vapor Intrusion

Vapor Intrusion Database

The Vapor Intrusion Database contains data to support site-specific estimates of vapor attenuation, or the reduction in vapor concentrations as vapor-forming chemicals move from soil and groundwater into indoor air.

Please note that EPA most recently updated this database in 2012.

For your convenience, a User's Guide is provided as the first tab of the Excel® file.

Note: This file contains macros and you must have an authorized copy of Microsoft Excel® in order to open it. When opening this file the user will be asked to either enable or disable macros. The user must select "Enable Macros." If the security level on the user's computer is set to "High," macros will be automatically disabled. The user can adjust the security level for Excel® as follows:

  1. Open the Excel® application.
  2. Click on the Tools menu and select "Macro" and then "Security."
  3. An "Options" window will pop up. In this window, click on the "Security Level" tab.
  4. In the Security Level tab, select "Medium."

If the user has opened the file before adjusting the security setting, the user will need to close application and then reopen it after adjusting the security settings in order to use the marcos.

  • Vapor Intrusion Database(6 MB)

The database and estimates of site-specific vapor attenuation are further described and documented in a technical report.

Vapor Intrusion

  • About Vapor Intrusion
  • Vapor Intrusion at Superfund Sites
  • Resources
  • Vapor Intrusion Database
Contact Us About Vapor Intrusion
Contact Us to ask a question, provide feedback, or report a problem.
Last updated on September 26, 2024
  • Assistance
  • Spanish
  • Arabic
  • Chinese (simplified)
  • Chinese (traditional)
  • French
  • Haitian Creole
  • Korean
  • Portuguese
  • Russian
  • Tagalog
  • Vietnamese
United States Environmental Protection Agency

Discover.

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

Connect.

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

Ask.

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

Follow.