Carbon monoxide — people call it CO — is basically invisible danger. It has no color, no smell, no taste. The CDC says more than 400 Americans die from unintentional CO poisoning every year in situations not even related to fires, and more than 100,000 people end up in emergency rooms. Those are not small numbers. And because CO is completely undetectable without an alarm, many victims don’t realize it’s building up until symptoms — dizziness, headache, confusion — are already serious.
Where does CO come from? Things like gas stoves, furnaces, water heaters, and generators can all produce it when they’re not working right or when they’re used somewhere they shouldn’t be. This matters a lot for renters, because you’re often relying on equipment you didn’t choose and can’t fully inspect yourself.
Here’s where it gets complicated: the law is not the same everywhere. As of 2018, 38 states required CO detectors in homes under their building codes, according to research published on PubMed Central — but those numbers may have changed since then, so always check current rules for your state. Building codes and tenant protection laws are also different things, so whether YOUR landlord is legally required to provide you a working detector depends on exactly where you live. The situation in hotels and motels is even spottier — as of that same research, only 14 states had laws specifically requiring CO alarms in hotels and motels. So if you’re traveling and just assuming your hotel room is covered, there’s a real chance it isn’t.
A survey by UL Standards and Engagement found that nearly half of travelers — 46% — don’t worry about CO exposure in hotels or rentals because they just assume alarms are already installed. Another 44% believed every state has laws requiring them. Both of those assumptions can get people hurt. The gap between what people think the law requires and what it actually requires is genuinely dangerous here.
The single most important thing you can take from this: do not assume a CO detector exists or works just because you’re in a rental or a hotel. Check when you arrive. If you’re renting long-term, look up your specific state’s current laws — tenant rights organizations and your state health department website are good places to start. If there’s no detector and your state requires one, that’s something your landlord is responsible for fixing. An alarm is cheap. Getting caught without one is not a risk worth taking.