Could your Vacation Rental Be Exposing You to Mold?
Could Your Vacation Rental Be Exposing You to Mold?
You spend weeks researching flights, restaurants, and things to do before a vacation. But how often do you think about the air you'll be breathing once you arrive?
Summer is peak travel season, and millions of Americans will spend time in hotels, vacation rentals, beach houses, and cabins over the next few months. While most travelers are focused on ocean views and comfortable beds, fewer people pay attention to one of the most common indoor environmental issues: hidden mold.
The U.S. Environmental Protection Agency (EPA) states, "the key to mold control is moisture control." Mold can begin growing within 24 to 48 hours when moisture is present — and vacation rentals, often affected by seasonal vacancy, inconsistent maintenance, and high summer humidity, can create ideal conditions for mold to grow out of sight.
Why summer creates the perfect environment for mold
Mold needs three things to grow: moisture, warmth, and a food source. Unfortunately, many vacation properties check all three boxes.
Sources: EPA — A Brief Guide to Mold, Moisture and Your Home; CDC — Mold
High humidity, summer storms, plumbing leaks, condensation from air conditioning systems, and gaps in occupancy can all allow mold to grow behind walls, inside HVAC systems, or beneath flooring. Properties that sit vacant between guests are especially vulnerable — when AC isn't running consistently, moisture builds up inside the home, often unnoticed until the next guests arrive.
The EPA also advises that mold contamination inside HVAC systems should be addressed promptly, since contaminated systems can distribute mold spores throughout a building the moment they power on.
The first warning sign is often your nose
A rental may smell a little different than home. That's normal. But a musty odor shouldn't be ignored. Many indoor air quality professionals identify persistent damp, earthy, or musty smells as a common indicator of hidden moisture problems — most noticeable when AC first turns on or after a property has been closed up for an extended period.
A musty smell doesn't automatically confirm mold is present, but it often signals excess moisture, which is the condition mold needs to grow.
Feeling worse on vacation?
On a highly anticipated trip, there's nothing worse than suddenly feeling sick. Symptoms that can appear mid-trip include:
These symptoms can easily be blamed on travel stress, dehydration, or allergies. According to the CDC, exposure to damp indoor environments and mold may cause nasal congestion, coughing, wheezing, sore throat, skin irritation, and eye irritation — particularly in people with allergies, asthma, or other respiratory conditions. They may be worth considering if they begin shortly after arriving and improve after you leave.
Three things to look for when you check in
Before you fully settle in, take a quick look around.
- Check for musty odors, especially near vents, bathrooms, and closets
- Look for water stains on ceilings, walls, or around windows
- Pay attention to excessive humidity or condensation, including around HVAC units or damp corners
These don't always confirm mold, but they may indicate moisture problems that deserve attention.
The bottom line
The likelihood of running into mold on vacation is slim, and that's not what this is about. Go on your trip, enjoy yourself, and don't overthink it. Being informed is just part of traveling smart.
Understanding the warning signs means you can walk into any rental or hotel room knowing what to look for: musty odors near vents, water stains on ceilings, bathrooms that feel persistently damp. It means checking reviews not just for comfort and location but for any mention of smell or air quality. It means choosing properties with good ventilation, consistent upkeep, and high guest turnover, since frequently occupied and cleaned spaces tend to have fewer opportunities for moisture to sit unnoticed.
It's also worth noting that some people actually feel better when they travel, and that can be telling in its own way. If you consistently feel better away from home, your own indoor environment may be worth a closer look.
Because when it comes to mold, what you can't see is often the problem.
Urine mycotoxin testing — RealTime Laboratories
If you've returned from a trip feeling unusually fatigued, congested, or simply not like yourself and you're wondering whether your environment may have played a role, RealTime Labs' urine mycotoxin testing can help you and your healthcare provider better understand potential mycotoxin exposure.
Sources
Centers for Disease Control and Prevention (CDC). Mold. cdc.gov
U.S. Environmental Protection Agency (EPA). A Brief Guide to Mold, Moisture and Your Home. epa.gov
U.S. Environmental Protection Agency (EPA). Mold Course: Chapter 2 — HVAC Systems. epa.gov
U.S. Environmental Protection Agency (EPA). Mold Cleanup in Your Home. epa.gov
National Institute for Occupational Safety and Health (NIOSH). Mold, Testing, and Remediation. cdc.gov