Are You Prepared For The HON MACT?
The July 2026 deadline is quickly approaching, here is what you need to do now
With the July 2026 compliance deadline approaching, you need to act now. Implementing a comprehensive HON MACT program takes time, but after helping more than 30+ facilities become HON MACT ready, we've pulled together the resources you need to create an action plan today.
The resources below are designed to help guide your path forward.
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Are You Familiar With The Key Requirements of HON MACT?
The Updated HON MACT Rule Requires:
- Fenceline monitoring
- Enhanced tracking of ethylene oxide, vinyl chloride and other HAPs
- Faster and more transparent exceedance responses
- Clearer pathways for using real-time tools as alternative methods
Montrose’s Expert Team Breaks It Down—Hear What HON MACT Means For Your Facility
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How We Help Facilities Navigate HON MACT
Fenceline Monitoring
- Strategic siting and deployment
- Sensor integration and validation
- Exceedance investigation and root cause response
Advanced Lab Analysis
- High-sensitivity HAP analysis
- Method expertise and QA/QC rigor
- Rapid turnaround to support response timelines
- Defensible data for regulatory reporting
Real-Time Monitoring
- Continuous data aggregation and visualization
- Exceedance alerts and documentation workflows
- Integration of passive and active monitoring tools
- Transparent reporting
Strategic Pilot Studies
- Baseline development before enforcement pressure
- Validation of monitoring technologies
- Identification of gaps in passive-only systems
- Operational stress-testing before July 2026
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Keeping The Momentum With Pilot Studies
Montrose Environmental is your trusted partner for navigating this evolving landscape. From strategic pilot studies to real-time monitoring and root cause analysis, we help chemical operators move beyond compliance to gain operational control and insight.
Why expert support matters:
- Passive methods miss intermittent emissions
- Fenceline exceedances trigger 30-day root-cause mandates
- Delays in implementation increase costs, risks and scrutiny
- Pilot studies today provide critical baseline data for long-term compliance
With regulatory expectations growing, passive monitoring alone may not be enough. Real-time tools help fill these gaps, giving you visibility when it matters most.
Watch: What Goes into a HON MACT Pilot
Additional HON MACT Resources
Beyond Compliance: How Smart Facilities Are Getting Ahead of the HON Rule
As the July 2026 HON Rule compliance deadline nears, chemical facilities are navigating both new exemption timelines and stricter emissions standards—and those that treat temporary relief as an opportunity to build stronger monitoring and data strategies are positioning themselves to stay ahead of regulatory and operational risk.
HON Compliance Workshop Recap: Why Pilot Studies Matter Now
HON MACT: Key Compliance Milestones
The HON MACT deadline is coming up fast and compliant programs take time. Now is the time to act.
Get in touch with a HON MACT expert to:
- Build a defensible emissions strategy
- Find the right real-time and fenceline monitoring solution for your facility
- Create a custom implementation plan to stay on track for your deadline
