The numbers behind the hantavirus warnings
New Mexico is not a place where hantavirus is a distant statistic. The state health department has recorded 142 cases and 55 deaths since 1975, and the recent years are not zeroes: seven cases in 2025, six in 2024, seven in 2023, three in 2022, and two already confirmed in 2026. Set against the national picture, that concentration makes sense. The CDC counts 890 cases across the country since 1993, with 94 percent of them occurring west of the Mississippi, because the carrier is the deer mouse and deer mice are a western animal. What matters practically is the exposure route. People do not catch this from a bite or from being near a live mouse in a yard. They catch it by breathing air that has dried droppings or urine in it, which happens when someone disturbs an enclosed space that has held a rodent population for months. So the risk in Albuquerque sits in a very specific set of places: a shed nobody opened all winter, a garage with boxes stacked on the floor, a casita used for storage, a truck that has not been driven since autumn. If those describe your property, the cleanup procedure is the first thing to get right, before you think about traps at all.
Why spring cleanup is the moment to be careful
The dangerous part of the year here is not when rodents move in. It is when people go in after them. Through autumn and winter, a closed outbuilding is quiet. Droppings accumulate on shelves, in drawers, inside stored equipment and under boxes, and in a climate with 44 percent humidity they dry out thoroughly. Then the weather turns, the shed gets opened, and the instinct is to sweep it out or hit it with a shop vacuum. That single decision is the difference between a routine chore and an exposure. Dry sweeping lifts fine particles into an enclosed space with poor airflow, which is exactly the condition the health guidance is written to prevent. The alternative takes twenty extra minutes. Open the doors and windows and walk away for half an hour. Come back with gloves and a sprayer of bleach solution mixed at roughly a cup and a half per gallon. Wet everything, including material you plan to throw away, and give it five minutes. Then wipe up with paper towels, bag the waste, and wash thoroughly. Do the same thing for a vehicle that has been sitting, since nesting under a seat or in a cabin air filter is common and the space is small enough to concentrate whatever you stir up.
Water is the lever in a nine-inch rainfall city
In most of the country, rodent advice starts with food. At this elevation and this rainfall, the more useful question is where an animal drinks. Nine inches of precipitation a year and 44 percent average humidity mean natural water is scarce for most of the year, so anything that supplies it reliably becomes a magnet. Drip irrigation emitters, a valve box that holds moisture, a leaking hose bib, a swamp cooler with a wet pad and an overflow line, and a condensate drain all qualify. So does a pet bowl left outside overnight. That has two practical effects. The first is where you look: activity in Albuquerque clusters around plumbing and irrigation rather than around the pantry, so an inspection that only checks the kitchen is looking in the wrong place. The second is what to fix. Repairing a slow leak or reworking a cooler line often does more than any additional trapping, because it removes something the animal cannot find twenty feet away. It also protects the plumbing itself, since rodents chew irrigation and cooler lines specifically to reach the water inside them, and that damage tends to show up as a mystery leak long before anyone connects it to the droppings in the garage.
Sealing a block and stucco house
Exclusion advice written for wood-framed houses in wetter climates does not translate cleanly to construction here, so it is worth knowing what the openings look like on a New Mexico property. Weep holes and vent openings in masonry are designed to be there and cannot simply be filled. They get covered with quarter-inch hardware cloth or purpose-made covers that keep drainage working while excluding animals. Stucco develops cracks and separations at corners and around penetrations, and those need patching rather than screening. The penetrations that matter most are the ones nobody planned: the hole cut for a swamp cooler line, the gap where conduit enters a wall, the space around a gas line, and the point where an irrigation supply passes through. Each is easy to close with metal and mortar, and each is routinely left open for years. Then there are the outbuildings. Sheds sitting on skids leave a gap along the whole skirt. Garage doors have bottom seals that harden and crack in the sun. Block walls have gaps at the base where soil has washed out. A sealing scope that covers only the main house on a property like this has closed maybe half the doors, which is why the survey should list every structure on the lot.
What to ask before you agree to anything
Two proposals can look similar on price and cover very different amounts of the property, so ask about scope in specific terms. Ask which buildings are included. On a lot with a house, a garage, a shed and a wall, this is the question that moves the number most, and it is the one most often left implied rather than stated. Ask whether the openings are itemized with a material named for each. A line that says exclusion and nothing else cannot be checked after the crew has gone, and it usually covers less work than you would assume. Ask who handles cleanup and how. Given the health picture in this state, you want to hear ventilation, gloves, a wetting agent and bagging rather than a mention of vacuuming. If a provider describes a dry cleanup, that alone tells you enough. Ask about water sources, and whether the inspection covered irrigation, hose bibs and cooling lines. In a semi-arid climate that is where the problem is anchored. Finally, ask how many return visits are included and what happens if activity resumes. A monthly bait station charge with no repairs attached leaves the property exactly as it was, and here it also leaves you with animals dying in places you will later have to clean out.