If your Jonesboro AC or ductwork smells musty or shows growth, the job is to stop the water, clean metal parts and replace moldy duct board or lined duct, ideally after an inspection names the cause. EPA advises against running a system you suspect is contaminated. Call the number on this page to be connected with a local mold remediation company in Jonesboro.

Jonesboro is the Clayton County seat, about 16 miles south of Atlanta, with a historic district downtown and a long history as a railroad town. Older houses near Main Street and newer subdivisions alike tend to put ducts in attics or crawl spaces, where humid air or summer heat works against them. A duct that sweats every afternoon from June to September can soak its insulation without ever showing a drip in the living space, so the smell is often the first clue.
Steps to take now
- Turn the HVAC off if you can manage without it for a day or two.
- Check the drain pan under the indoor coil for standing water or rust.
- Look along visible ducts for sweating, sagging insulation or water stains.
- Photograph everything before any cleaning.
- Keep anyone with asthma or a weakened immune system away from the affected area, as EPA advises.
- Write down the age of the system and any recent repairs.
- If you rent, notify the landlord in writing and keep a copy of the note.

What you see and what usually causes it
| What you see | Likely cause |
|---|---|
| Earthy smell when cooling starts | Wet coil or pan with growth |
| Fuzzy dust on return grille | Damp return duct or high indoor humidity |
| Ceiling stain under attic air handler | Clogged condensate line or cracked pan |
| Wet duct insulation under the floor | Condensation in a humid crawl space |
Clayton County was among the Georgia counties under a state of emergency during the September 2009 floods. Building permits inside Jonesboro go through City Hall at 1859 City Center Way (770-478-3800); ask whether replacing an air handler or ducts needs one. For health questions, the Clayton County Board of Health has an environmental health office on Battlecreek Road in Jonesboro, and Georgia DPH notes that indoor mold has no enforceable state or federal standards.
What affects the price
- How many duct runs have growth and whether they are metal, flex or duct board
- Whether the coil, blower or drain needs an HVAC technician
- Access to the unit in an attic or crawl space
- Damaged ceiling drywall or insulation from overflow
Angi's Atlanta cost guide reports HVAC system mold remediation at $3,522 to $11,740, and HomeGuide's 2026 national range for HVAC systems or ducts is $2,000 to $10,000.
HVAC & Air Duct Mold Removal questions in Jonesboro
Will the county health department inspect mold in my ducts?
Is regular duct cleaning the same as mold removal?
Will the mold come back after the system is cleaned?
What does HVAC mold removal cost around Atlanta?
More mold services in Jonesboro
HVAC & Air Duct Mold Removal nearby
Sources
- EPA: Mold Cleanup in Your Home
- EPA: A Brief Guide to Mold, Moisture and Your Home
- EPA: Should You Have the Air Ducts in Your Home Cleaned?
- Angi: Mold Remediation Cost in Atlanta, GA
- HomeGuide: Mold Removal Cost (2026)
- U.S. Senate Resolution 286 (111th Congress) on the September 2009 Georgia floods (pdf)
- Jonesboro, GA building permits directory listing (PermitsAIGE)
- UGA: Georgia County Environmental Health Contact Information (pdf)
- Georgia DPH: Indoor Air Quality/Mold
- Jonesboro, Georgia (Wikipedia)
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