Propane safety basics every NM household should know

Most households never think about the tank behind the house until the day something smells wrong in the utility room. Knowing what propane smells like, and knowing the exact order of your next three moves, is what separates a routine service call from an emergency. Our team runs deliveries and service across Mountainair, Pecos, Moriarty and the 35 miles or so around each of those, and the families who handle a leak calmly are always the ones who talked it through beforehand.

Here's the plain version: what that odor is, what to do first, when a phone call is enough, and when everyone goes outside and stays outside.

What propane actually smells like

Propane comes out of the ground colorless and odorless. An odorant gets added before it's ever sold to you — almost always ethyl mercaptan, a sulfur compound — for one reason: so your nose can find a leak your eyes never will. That isn't a courtesy from the industry. It's baked into the federal and industry safety standards the whole trade operates under, including NFPA 58, the code covering propane storage and handling.

Descriptions vary. Rotten eggs is the classic one. Plenty of folks say skunk instead, or a dead animal under the floor, or the sharp burnt smell of a struck match. Any of those near an appliance or the tank is worth stopping for.

Two things about noses. Some people just smell less — colds, allergies, age, tobacco, and some medications all blunt it. And the odorant itself can weaken, passing through rust or scale inside an old line, or filtering through soil if the leak is underground. That matters on the ranch properties and older rural setups we serve, where buried lines run out to a shop, a well house, or a barn. Propane is also heavier than air, so it settles low — a crawlspace, a floor vent, the bottom step of a stairwell. If you're standing and smell nothing but a kid on the floor says it stinks, believe the kid.

If you smell gas, do this in this order

Don't hunt for the source first. Order matters more than speed:

• Get everyone out of the building — people and animals, right away.
• Touch nothing electrical or flame-related on the way out. No light switches, no thermostat, no garage door button, no phone, no appliance. Don't strike a match and don't blow out a candle. Leave the doors open behind you.
• If the tank valve is safe to reach without walking back through the smell, turn it clockwise to shut it off.
• From a safe distance — a neighbor's, the end of the drive, the county road — call us. If anyone's in danger or the odor is strong, call 911 first, then call us.
• Stay out until a qualified technician says it's safe. Not until the smell fades. Until a trained person with a gas detector clears it.

That last step is where good instincts go sideways. Airing out a house doesn't mean the leak stopped. Before gas goes back on, a qualified technician has to run a leak check on the system — required under the national fuel gas standards, and there's no version of this job that skips it.

When to call versus when to evacuate

The honest dividing line: a faint, brief odor with an obvious cause is a phone call. Everything else is an evacuation.

Call us and stay put if you catch a whiff for a second as a burner lights, or right after a delivery, or you notice a light smell outdoors near the tank with nothing else going on. Call us too — smell or no smell — if a pilot won't stay lit, burner flames run yellow and lazy instead of crisp blue, you hear a soft hiss at a fitting, you spot frost on a regulator during warm weather, or an out-of-gas event left an appliance valve sitting open.

Get out first and call from outside if the odor is strong or persistent, if it's coming from a crawlspace or low room, if anyone feels dizzy, nauseated, or unusually sleepy, if you hear an active hiss or roar, or if the smell follows a storm, a fallen limb, or somebody digging. That last one is real here — monsoon runoff and arroyo washouts move soil and can expose or stress a buried line, and fence-post and trench work is constant on New Mexico acreage. Call 811 before any digging, every single time.

One more piece of local reality: our service area covers a lot of ground, and a call from a remote stretch outside Mountainair or Pecos is not a five-minute response. Distance is exactly why the get-out-first order is written the way it is. Put yourself somewhere safe, then let the clock run.

Detectors, and what they can and can't do

We recommend a propane-specific gas detector as backup to your nose, not a replacement for it. Because propane pools low, mount those units near the floor, in rooms with propane appliances and anywhere gas could collect. Follow the manufacturer's placement instructions — they differ by model — and keep units clear of drafts, vents, and dead-air corners.

A carbon monoxide alarm is a different device for a different hazard. CO comes from incomplete combustion and is odorless; a gas detector won't catch it. Most homes we serve want both, plus working smoke alarms. Test them monthly, change batteries on a schedule you'll actually keep, and replace units at end-of-life — detectors expire, generally somewhere in the five-to-ten-year range.

The rest is upkeep. High-desert sun and wind are hard on hoses, gaskets, and paint, so look at your tank and regulator now and then. Keep brush, weeds, and stored fuel away from it. Clear snow off the regulator with a broom, never a shovel. And have appliances and connections inspected on a regular cadence by someone qualified to work on gas.

If you'd like eyes on your system, you're not sure where your shutoff valve is, or you just want to walk through this with a person before winter, call us at (505) 407-2260 or visit https://southwestpropane.org. We'd much rather answer the question on a quiet Tuesday than meet you at the end of your driveway.