Security fog · permits and ordinances
Your village has an opinion about fog. Find out before it is on the wall.
Security fog is spreading fast enough across the south suburbs that municipalities have started writing rules for it. Alsip already has. The rules are reasonable, they are not onerous, and they decide which equipment you are allowed to buy — which makes them worth knowing before you sign a quote, not after.
The first one on the books
What Alsip requires
After a run of smash-and-grab break-ins, enough Alsip businesses — gaming cafés in particular — started fitting fog that the village put a process around it. Two requirements, both aimed at the fire department rather than at you.
- 01An electrical permit from the Alsip Building Department. The village wants to know a system is going in, and wants the install inspected like any other fixed electrical work. This is the part most people do not find out about until an inspector is standing in the room.
- 02Water-based fog fluid, not oil-based. Stated plainly by the fire department, and it is the requirement that eliminates equipment rather than just adding paperwork. If the unit you were quoted runs an oil-based fluid, it is not going in.
“The provisions are for the fire department. If a device is activated, we can tell the difference between [the density fogger] and a real fire.”
“This is for the protection of everyone’s respiratory system, including the firefighters. This is our check and balance to be notified of a system going in and to ensure ordinance compliance.”
Chief Tom Styczyski, Alsip Fire Department, quoted in Patch, 6 May 2026.
Note what he is not saying. This is not a village trying to stop anyone fitting fog — the same chief called the department “100 percent in support of our business at curbing or stopping these events,” and noted that “a lot of local businesses are having these installed.” It is a village making sure that when a head discharges at two in the morning, the crew rolling up knows they are looking at a security system and not a fire.
The requirement that picks your equipment
Water-based or oil-based, and why a fire chief cares
An oil-based unit is a system you may not be permitted to switch on
Fog generators are not all filled with the same thing. The good ones use a glycol-and-water fluid — the same chemistry as theatrical fog, which is why it disperses cleanly and leaves nothing behind on stock. Cheaper and older units use an oil-based fluid, which hangs longer, settles as a film, and is markedly less welcome in a building the fire service may have to enter.
Alsip has already drawn that line. Others will. Buying an oil-based unit today to save a few hundred dollars is buying a system that a future ordinance can strand.
Everything we specify runs a water-based glycol fluid and meets EN 50131-8, the European standard for security fog devices. That is not a position we adopted for the ordinance — it is what we already fitted, because the residue question is the first thing a retailer asks and “nothing settles on your stock” is only a true answer for one of the two chemistries.
The part no ordinance has written down yet
Fire alarm coordination
A dense white cloud filling a building at 2 a.m. will be read by some smoke detection as exactly what it looks like. Get this wrong and the first discharge produces a fire response, a building evacuation you did not need, and a conversation with the village you would rather not have had.
- DETECTION TYPEWhich detectors are in the protected space, and how each responds to a glycol aerosol. Optical and ionisation devices do not behave the same way.
- SEQUENCINGFog fires on a confirmed intrusion — two independent signals, not one — and never on a fire alarm condition. If the building thinks it is burning, fog does not discharge.
- NOTIFICATIONThe panel, the monitoring centre and, where the village asks for it, the fire department all know a fog device is present and where it is.
- SIGNAGEAt every entry a responder might use. Cheap, required by good practice, and the thing that tells a firefighter at the door what they are walking into.
How we handle it
We make the call to the village. It is part of the job.
Before the quote
We check what your municipality currently requires — permit, fluid type, fire department notification — and tell you what we find. Ordinances are new and moving; the answer for Alsip is not automatically the answer for Mokena.
Pulled, not left to you
Where an electrical permit is required, we pull it and we meet the inspector. You should not be finding out about a permit from someone standing in your shop.
Fire alarm and monitoring
Sequencing agreed with whoever holds your fire alarm and your monitoring contract, in writing, before a head goes on a wall.
Annual service record
Cartridge life, self-diagnostic history and a discharge test, recorded. It is what an insurer asks for and what a village will ask for if it ever writes an inspection into the ordinance.
Requirements described here are as published by the Village of Alsip and reported in May 2026. Municipal rules change and vary between villages; we confirm the current position with your municipality for every job rather than relying on this page. Nothing here is a guarantee of approval in any particular jurisdiction.
Ask the permit question before the quote question
If someone has quoted you a fog system and the words “permit” and “water-based” did not come up, that is worth a second opinion. A site walk is free.
Book a site walk · How security fog works · Fog for gaming cafés