Stay Ahead of HON MACT
Expert Pilot Studies, Real-Time Monitoring Tools, Proven Results
The HON MACT rule introduces sweeping changes to how chemical facilities monitor and manage hazardous air pollutants—particularly at the fenceline.
Regulators and stakeholders have made it clear: facilities that act early will be better positioned to meet long-term goals. The following resources are intended to help guide facilities in their approach to managing compliance.
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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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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
Let's solve this together
Don't Wait. Lead.
Despite a possible compliance extension, the most successful facilities are using it as a launchpad—not a lifeline.
By continuing or initiating pilot studies now, you can:
- Build defensible emissions baselines
- Practice regulatory response timelines
- Identify gaps in passive-only systems
- Gain confidence in monitoring technology and workflows
Schedule a HON MACT Strategy Session
Additional Resources
Access Useful Videos
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