Welcome to the Association of Vapor Intrusion Professionals

AVIP is a community of professionals dedicated to advancing the industry and science of vapor intrusion. The purpose of this association is to promote the establishment of accepted and recognized best practices for vapor intrusion professionals, provide contextual knowledge, and serve as a resource of information for the general public.

UPCOMING EVENTS

4th Annual AVIP VI Conference | October 12-15, 2025 | Austin, TX

Toronto Vapour Intrusion Conference | May 21, 2025 | Brampton, ON

Learn more from our events page!

AVIP Best Practices

The Association of Vapor Intrusion Professionals (AVIP) is working in collaboration with a variety of stakeholders (e. g., regulators, environmental consultants, mitigation specialists, insurance providers, academia, laboratories, attorneys, etc.,) to develop a series of peer-reviewed best practice documents for the vapor intrusion industry.

The Benefits of Membership

Increased Visibility in the Industry
Searchable Profile - "Find a Professional"
A Voice in standards of practice for federal and state regulations
VI Community
Access to updated Regulations and Standards
State and Local Government Contact Information for VI
Training
Certification
Search for VI Vendors/Suppliers
Discount on AVIP Conferences
Discount on All Training
Networking Events
Member Events
Locate a Member
Sign up for Alerts
Use of the Approved AVIP Logo Badge for Members and Sponsors

Join now!

What Is Vapor Intrusion?

Vapor intrusion occurs when there is a migration of vapor-forming chemicals from any subsurface source into an overlying building. Recognition of soil vapor intrusion to buildings and other enclosed spaces occurred in the 1980s with concerns over radon intrusion. Subsequently, there was an increasing awareness that anthropogenic chemicals (e.g., petroleum hydrocarbons and chlorinated solvents) in soil, groundwater, and sewers and drainlines could also pose threats to indoor air quality via the vapor intrusion pathway.

Vapor-forming chemicals may include:

Quick Links

Announcements

2025 AVIP VI Conference Registration is now open!

We are thrilled to announce that registration for the 4th Annual Vapor Intrusion Conference, taking place from October 12th-15th at the Austin Marriott Downtown in Austin TX is now open!

Click here to learn more!

Join Us at the Toronto Vapour Intrusion Conference (TVIC)!

We are thrilled to announce the Toronto Vapour Intrusion Conference (TVIC) presented by VEI Contracting Inc., in partnership with AVIP designed to empower stakeholders with a complete understanding of the vapor intrusion (VI) process, from start to finish.

Click here to learn more!

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For more about AVIP, please take a moment to view our video.

We look forward to working with you to increase the standard of practice in the VI industry.