Do You Need an Air Emissions Permit in Florida?

I keep running into this. A manufacturing facility has been running for years — dust collectors, fume hoods, a diesel backup generator, maybe a boiler — and nobody has ever looked into whether they need an air permit from FDEP.

It's not that they're trying to dodge it. They just never thought about it. The equipment was there when they moved in. Nobody told them. And then an audit happens, or a corporate due diligence, and suddenly it's a question with teeth.

The Short Answer

If your facility emits anything into the air — particulate matter from powder handling, VOCs from solvents or coatings, combustion products from a boiler or generator — you probably need to at least evaluate whether a permit is required. In Florida, FDEP handles air permitting through their district offices, and the rules are in Chapter 62-210 through 62-297 of the Florida Administrative Code.

The real question isn't "do we emit?" It's "do our emissions exceed the thresholds that trigger a permit?" And the only way to answer that is to actually inventory what you're putting out.

What Triggers a Permit

Florida uses a tiered system. The biggest factors:

• Potential to Emit (PTE): This is the maximum your equipment could emit if it ran flat out, 24/7/365, with no controls. If your PTE for any criteria pollutant exceeds certain thresholds (typically 100 tons/year for major sources under Title V, lower for some HAPs), you're looking at a permit.
• Actual Emissions vs. Minor Source Thresholds: Even if you're not a major source, Florida requires registration or a minor source permit for many facilities. The thresholds vary by pollutant and location.
• NESHAP Applicability: Some equipment types have their own rules regardless of total emissions. Diesel engines, for example, fall under 40 CFR 63 Subpart ZZZZ. Emergency-use generators often qualify for exemptions, but you need documentation proving it.

The Diesel Generator Question

This comes up a lot. You've got a diesel-fired emergency generator. It only runs during power outages and for weekly testing. Do you need a NESHAP permit?

If it meets the definition of an emergency engine under Subpart ZZZZ, you're likely exempt from the emission standards — but you still have to meet the maintenance and operational requirements. And you need documentation. "It's just for emergencies" isn't a compliance strategy. You need records showing run hours, maintenance logs, and that you're not using it for peak shaving or non-emergency purposes.

What I'd Recommend

If you haven't looked at this, start with a qualitative emissions inventory. Walk your facility and identify every source: dust collectors, exhaust fans, spray booths, boilers, generators, fume hoods, anything with a stack or vent. Then get someone qualified — an environmental engineer or IH firm — to run the calculations on your potential to emit.

It's not expensive if you do it proactively. It gets very expensive when FDEP or a corporate auditor finds it first.

I've worked with IH firms that can do the emissions inventory, permitting evaluation, and any required testing in a single site visit. Get it done, get the documentation, and move on. It's one of those things that takes weeks to procrastinate on and days to actually finish.