Manage, analyze, and report fenceline monitoring data with Fenceline ProTM, a software solution built to help facilities comply with fenceline monitoring requirements.


In 2015, the EPA introduced the Refinery Sector Rule, requiring refineries to monitor and report benzene emissions along their fenceline. Then in 2023, the EPA announced amendments to the New Source Performance Standards (NSPS), establishing standards for how industries, like those in the synthetic organic chemical and polymer/resin industries, monitor their emissions of hazardous pollutants. This update is more commonly referred to as the HON rule.

When refineries were required to comply with the Refinery Sector Rule, we introduced Fenceline Pro to help facilities simplify the fenceline monitoring data management process. Now, we've expanded its capabilities to assist industries in complying with the amended EPA HON rule.

Maintain compliance with the EPA HON rule and Refinery Sector Rule (RSR) fenceline monitoring data management requirements

Leveraging decades of regulatory experience, Trihydro developed Fenceline Pro to meet fenceline monitoring compliance challenges with a proactive, transparent, and secure software solution that enables facilities to make intelligent decisions resulting in reduced costs and better risk management.

Fenceline Pro allows facility personnel to efficiently collect, monitor, and report air pollutant data at the fenceline to comply with federal regulations, such as the EPA HON rule and Refinery Sector Rule (RSR). With Fenceline Pro, air compliance teams can improve field data accuracy, track trends, identify contributing factors, and create an easily auditable process.
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Fenceline Monitoring Field Data Collection

Easy to use mobile app to quickly capture field data.

  • Automate workflows
  • Automatically collect sample placement and collection times
  • Capture sample tube IDs and sample types
  • Collect data offline

Program Compliance

Built-in business logic supports compliance with EPA methods.

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Data Management

Streamlined digital data collection and data visibility.

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One-Button EPA Reporting

Fenceline Pro populates regulatory reports, including the EPA CEDRI report, with complete sample data for submittal.

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Alerts and Notifications

Proactive communications to support program compliance.

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Getting Started Is Easy

Ready to take advantage of Fenceline Pro’s secure data management, visualization, and analysis tools, simple EPA reporting, and positive return on investment? Here’s what the next steps look like:

  1. Schedule a demo: Experience Fenceline Pro’s features and see how they benefit your fenceline monitoring process.
  2. SaaS agreement: We work together to execute a SaaS agreement that works for your business.
  3. Data setup: We import information provided by your team.
  4. User experience customization: We help set up your preferred role-based access controls, workflows, and notification settings.
  5. Onboarding and training: Your team is onboarded through a series of trainings where users learn how to perform their tasks using Fenceline Pro. Ongoing support is provided through the helpdesk for all your users, regardless of their role.

Refinery Tablet Data Collection

Fenceline Monitoring Compliance: Overcoming 9 Challenges in Data Collection and Management

As the EPA HON rule deadline for proposed requirements rapidly approaches, let's dive into the challenges that facilities commonly encounter in fenceline monitoring data collection and management.

EPA’s Fenceline Monitoring Requirements for Synthetic Organic Chemical Manufacturing Industry (SOCMI) and Group I and II Polymers and Resins Industries

The EPA has published the Final HON Rule. Learn more about the fenceline monitoring requirements and what affected facilities can do to prepare.

Contact us to get started

Contact us today to simplify your fenceline monitoring compliance efforts.

Kari Ward Headshot 
Fenceline Pro Product Manager