If someone types “I smell gas” into your website chat, the agent should stop being a chat. One short answer: get out of the building now, then call 911 and the gas utility from outside. No follow up questions, no booking form, and a real person on your end alerted the same second.
A dispatcher has tools your chat box does not
The U.S. Consumer Product Safety Commission publishes a guide called “Responding to Residential Carbon Monoxide Incidents”, subtitled guidelines for fire and other emergency response personnel. The back page carries its date: July 2002. Inside it is a single page written for dispatchers.
That page takes the caller’s name, address, and telephone number, then asks one thing: is anyone unconscious, nauseous, lightheaded, having headaches, having chest pains. Yes sends an ambulance. No moves to a second question, is a carbon monoxide alarm sounding. Where the answer to either one is yes, the dispatcher gets a single line to say, which is to advise the caller and all other residents to go outside or to a neighbor’s home immediately.
The same guide opens with a line worth reading twice. It says it was built for public emergency response organizations, and that it is not directed toward non-emergency organizations that might receive carbon monoxide incident calls.
Your chat widget is a non-emergency organization receiving an emergency call. It cannot send an ambulance, cannot hear panic in a voice, and cannot stay on the line. So it should do the one thing it can do well, which is point at the people who can.
Your utility does not say what a generic script says
Here is the part most chat scripts get wrong. The safety wording is not the same everywhere, and the differences are real.
The Pennsylvania Public Utility Commission’s gas emergencies page tells you to leave the building at once, and to “Leave windows and doors open while exiting, to allow gas to vent outside”. The Washington Utilities and Transportation Commission’s pipeline emergencies page carries the same instruction. Neither page carries an update date.
National Grid, on its Massachusetts page for reporting a gas emergency, says the opposite. Its list reads “Leave the premise immediately” and then “Leave windows and doors as they are”. That page carries no update date either. The CPSC dispatcher guide, writing about carbon monoxide rather than a gas smell, tells the dispatcher not to take time to ventilate the home unless someone is unconscious or cannot leave.
Four documents, three answers about the windows. So do not let a model write this line from memory, and do not copy a script off another contractor’s site. Open your own gas utility’s emergency page, copy its wording, and use its number. National Grid prints 1-800-233-5325 beside 911 on that page. Yours will print its own.
None of this is legal advice. If you want to know what you are on the hook for after your website says something to a customer in an emergency, ask your own attorney and check what your state utility commission publishes. Whether you are stuck with what your chatbot said is a separate question with its own answer.
The phone in their hand is part of the danger
The Pennsylvania page has one more line that should change how you write the reply. It says do not make calls from your telephone land line or your cell phone while at home. National Grid’s list says do not touch light switches, doorbells, phones, or anything else that could cause a spark.
Your chat window is on that phone. Your customer is holding it, inside the house, in the gas.
So the emergency reply has to be short enough to read in one glance, and it has to end. Not a menu. Not an offer to book a technician. One screen: leave now, call 911 and this number from outside, stay out until someone tells you it is safe. Then the agent stops talking.
Gas you can smell, and gas you cannot
Natural gas has no smell of its own. Federal rules require that it be given one. Under 49 CFR 192.625(a), gas in a distribution line has to carry an odorant so that “at a concentration in air of one-fifth of the lower explosive limit, the gas is readily detectable by a person with a normal sense of smell”. That is the wording in the 2025 edition of the Code of Federal Regulations, revised as of October 1, 2025. National Grid names the additive on its own page: mercaptan.
Reading a federal rule is not the same as being advised on one. Nothing here is legal advice, and your own state adds utility rules on top of the federal ones, so ask your attorney and your state utility commission before you rely on any of it.
Carbon monoxide is the other one, and nobody smells it. The CPSC guide describes carbon monoxide in its pure form as colorless and odorless, and puts it at about 500 unintentional non-fire-related deaths a year. That count is from a 2002 document, so read it as the size of the problem, not as this year’s number. In a CDC press release dated February 17, 2021, now held in the CDC archive, the instruction is plain: if you have a CO detector, leave your home immediately and call 911 if it sounds.
That leaves your agent with three kinds of trigger and one first answer.
- Smell words. Gas, rotten eggs, sulfur, propane, hissing.
- Alarm words. CO alarm, carbon monoxide detector, beeping.
- Body words. Headache, dizzy, nauseous, chest pain, passed out.
Any of those, and the reply is get out and call. Not a quote. Not a calendar.
One honest limit. Not a single page above says a word about website chat. They were written for residents, dispatchers, and utilities. Nobody has published a rule for a chat widget on a plumbing site, so what you just read is a reading of safety instructions, not a rule you can point at.
Where an agent actually earns its place
An emergency is not the reason to put an agent on your site. Most of what people type into a chat box is ordinary: do you cover my town, what does a water heater swap run, can someone come Thursday. That steady middle is what an AI assistant is for. The gas message is the one it has to get right and then get out of the way for.
And if your after-hours work arrives by phone rather than through the website, a chat box is not the first thing to fix. A chat agent cannot help a customer who never opens your site, which is a separate question about answering the phone at night.
What to do this week
- Open your gas utility’s emergency page. Save the exact wording and the emergency number. If your trucks cross more than one utility territory, save each one.
- Write the emergency reply yourself, in plain words, short enough for one screen on a phone.
- Write out every phrase that should fire it, including bad spelling and the Spanish words your customers use.
- Set the handoff, and check where that alert actually lands. When it fires, a person on your end gets an alert right then, not a summary in the morning.
- Test every phrase on that list before the agent goes live. Testing an agent before you turn it on is a job of its own.
- Re-read the utility page twice a year. Wording changes, and nobody sends you a notice.
The rest of your chat can be warm and chatty. This part should be short, dull, and the same every single time.