New Orleans Mold: Is Leaky AC Making You Sick?

By Franklin Everett Shaw

August 2, 2025

The musty smell hits you the moment you walk in from the New Orleans humidity. It’s not just the usual dampness; it’s a distinct, earthy odor that clings to the air. You suspect mold, and living in the Big Easy, you know that a leaky AC unit is a prime suspect.

Let’s get real: mold and New Orleans go together like beignets and coffee. The constant humidity, combined with older housing stock and frequent heavy rains, creates a perfect breeding ground. But don’t panic. You can tackle this head-on.

First, become a mold detective. Grab a flashlight and start your investigation near your AC unit, both inside and outside. Look for these telltale signs:

Visible Mold: Obvious, right? But mold comes in many colors: black, green, white, or even orange. Look for fuzzy or slimy patches on walls, ceilings, or around the AC unit itself. Pay close attention to the drip pan.
Water Stains: Discolored patches on walls or ceilings, especially near the AC, are a major red flag. These indicate past or present water leaks, which feed mold growth.
Musty Odor: That distinctive smell is a key indicator, even if you can’t see the mold. The smell often intensifies when the AC is running.
Condensation: Excessive condensation on windows, walls, or the AC unit itself creates a damp environment that encourages mold.
Peeling Paint or Wallpaper: Moisture trapped behind paint or wallpaper can lead to mold growth, causing it to bubble or peel.

Don’t just visually inspect. Feel around for dampness. Use a moisture meter (available at most hardware stores for around $30) to check suspicious areas. A reading above 20% indicates excessive moisture.

Now, let’s talk about the AC unit itself. A clogged condensate drain line is the most common culprit. This line is designed to remove condensation from the AC unit. When it’s blocked, water backs up and spills, creating a perfect environment for mold.

Here’s how to check and clear the drain line:

Locate the Drain Line: It’s usually a PVC pipe sticking out of the wall near your outdoor AC unit. Sometimes it drains into a floor drain inside.
Check for Clogs: Look for standing water in the drain line or around the AC unit.
Clear the Clog: Use a wet/dry vacuum to suck out any debris from the drain line. You can also use a stiff wire or a plumbing snake to break up the clog. Pour a cup of distilled white vinegar down the drain line every month to prevent future clogs.

If you find mold, don’t immediately reach for the bleach. Bleach is only effective on non-porous surfaces. On porous surfaces like drywall or wood, it only bleaches the surface, leaving the roots intact. The mold will simply grow back.

For small areas (less than 10 square feet), you can often handle the remediation yourself. The EPA recommends using a detergent solution.

Here’s a DIY mold removal process:

Protect Yourself: Wear gloves, a mask (N-95 or better), and eye protection.
Contain the Area: Seal off the affected area with plastic sheeting to prevent spores from spreading.
Clean the Mold: Scrub the affected area with a detergent solution (dish soap and water works well).
Dry Thoroughly: Use a fan or dehumidifier to dry the area completely.
Dispose of Materials: Dispose of any contaminated materials (rags, sponges, etc.) in a sealed plastic bag.

For larger infestations, or if you’re sensitive to mold, call in the professionals. New Orleans has several reputable mold remediation companies. Look for companies that are licensed, insured, and certified by organizations like the IICRC (Institute of Inspection, Cleaning and Restoration Certification).

Here are a few local companies to consider (always get multiple quotes):

Advantage Environmental Consultants: They offer mold testing and remediation services throughout the New Orleans metro area.
United Environmental Solutions: Specializes in mold removal and water damage restoration.
EnviroHealth Consulting: Provides comprehensive mold inspections and remediation plans.

Louisiana law requires sellers to disclose any known mold problems during a home sale. However, it’s always a good idea to get your own mold inspection before buying a home, especially in New Orleans. A professional inspection can uncover hidden mold growth that the seller may not be aware of.

Preventing mold is always better than dealing with it after it’s taken hold. Here are some preventative measures you can take:

Regular AC Maintenance: Schedule annual AC tune-ups to ensure proper drainage and prevent leaks.
Dehumidifiers: Use dehumidifiers, especially during the humid summer months, to keep indoor humidity levels below 60%.
Proper Ventilation: Ensure adequate ventilation in bathrooms and kitchens to prevent moisture buildup.
Address Leaks Promptly: Fix any leaks in your roof, plumbing, or windows immediately.
Clean Gutters: Keep your gutters clean to prevent water from backing up and seeping into your home.

Consider investing in a smart thermostat that monitors humidity levels and automatically adjusts your AC to maintain a comfortable and dry environment. Some models even send alerts if humidity levels get too high.

Mold exposure can cause a variety of health problems, including:

Allergic Reactions: Sneezing, runny nose, itchy eyes, skin rashes.
Asthma: Mold can trigger asthma attacks in people with asthma.
Respiratory Problems: Coughing, wheezing, shortness of breath.
Skin Irritation: Rashes, hives, eczema.

If you suspect you’re experiencing symptoms related to mold exposure, consult with your doctor.

Don’t let mold take over your New Orleans home. By taking proactive steps to inspect, remediate, and prevent mold growth, you can protect your health and your property. Stay vigilant, stay dry, and laissez les bons temps rouler – mold-free!