Mold Remediation in Cobb County, GA: Who Can Help and Who Cannot

Ask the county health department about mold in your house and the answer is short. Cobb & Douglas Public Health says it has no authority over mold in private residences or rental properties. Its environmental health staff, whose Cobb office is in Marietta, deal with mold only as a sanitation matter in the places they already inspect, such as restaurants and hotels.

Water Damage Cobb County is a free referral service that connects callers with independent local mold remediation and water damage providers. It is not a contractor and not a testing lab, and it does not guarantee any provider’s work. Call the number on this page about mold after a leak, a flood or a damp crawl space, and you are connected with a local provider who does the looking, the quoting and the work.

This page covers mold remediation and mold removal for the whole county, with Marietta, Smyrna and Kennesaw included. It sets out who has a role and who does not, how Georgia treats mold, what the work involves, how big a patch you can reasonably handle yourself, what a published cost guide says, and where insurance stops. The rules and figures come from published sources, and each source is named where it is used.

Who cannot help, and who can, in Cobb County

For many people the first thought is the health department, so start there. Cobb & Douglas Public Health states that it has no authority over mold in private residences or rental properties. It addresses mold only from a sanitation standpoint in the places it inspects, and it gives restaurants and hotels as its examples.

The same page carries the agency’s position on testing, and it is worth reading before anyone sells you a lab report. It says a homeowner does not need to know what type of mold is growing, that the CDC does not recommend routine sampling for molds, and that whatever the type, the mold should be removed. In other words the county’s advice is practical: get rid of it, and do not spend money naming it first.

That leaves a homeowner with two things: a provider, and the homeowner’s own checks on that provider. A renter has a different route, covered in the tenants section below. The table sets out who does what, as each body describes its own role.

Who	What they do about mold	What they do not do
Cobb & Douglas Public Health	Deals with mold as a sanitation matter in places it inspects, such as restaurants and hotels; publishes guidance	Says it has no authority over mold in private residences or rental properties
Georgia Department of Public Health	Publishes a mold brochure and points residents to EPA and University of Georgia Extension guidance	Says it offers no specific services for indoor mold growth
Georgia Secretary of State licensing	Licenses general contractors, electricians, plumbers and heating and air conditioning contractors	Mold work is not on that list; University of Georgia Extension notes that Georgia has no licensing requirement for mold professionals
Your insurance company or agent	Decides whether a policy responds to the water loss behind the mold	Does not do the cleanup
An independent mold remediation provider	Assesses the damage, quotes the job and does the work	Works to no enforceable state or federal mold standard, going by the Georgia Department of Public Health
Water Damage Cobb County	Connects your call with an independent local provider, free of charge	Does no testing, cleanup or repair and guarantees no work

How Georgia treats mold

The state’s position is as plain as the county’s. The Georgia Department of Public Health says indoor air quality is not a regulated program in Georgia and that its environmental health branch offers no specific services for indoor mold growth. It adds that mold inspections, testing and remediation practices have no enforceable state or federal standards. For indoor air quality, its environmental health section says it regulates only tourist accommodations such as hotels and motels.

On licensing, University of Georgia Extension notes in its mold guidance that Georgia has no licensing requirement for mold professionals. That is Extension’s statement, not a legal opinion from this site. For a homeowner the practical effect is that a provider’s training and insurance are the things to ask about, since Extension describes no state mold license to ask for.

What Georgia does license is the rebuild. The Georgia Attorney General’s office says general contractors, electricians, plumbers and heating and air conditioning contractors must be licensed through the Secretary of State’s office. Its consumer education site gives the route for checking one: go to sos.ga.gov, choose Licensing, click Licensee Search and open the Building & Contractors tab. If a mold job turns into a general contractor’s rebuild, a plumbing repair or work on the heating and cooling system, those licenses are the ones to verify.

Mold remediation and mold removal: what the work is

People search for both terms and mean the same job. Removal is the visible part: moldy material comes out and surfaces are cleaned. Remediation is the wider task of correcting the conditions that let it grow, and that starts with water. OSHA says a remediation plan should include steps to permanently correct the water or moisture problem, and the joint federal guide for homeowners says to fix the moisture problem as well as clean up the mold.

No one can promise a house with no mold spores in it, because spores are a normal part of indoor and outdoor air. The trade standard, the IICRC S520 Standard for Professional Mold Remediation, now in its fourth edition (2024), frames the job that way. As training summaries of the standard put it, Condition 1 is a normal indoor level of spores, Condition 2 is settled spores that have spread from a growth area, and Condition 3 is actual growth. The aim is to return the space to Condition 1.

Here is the sequence a homeowner should expect an independent provider to follow, drawn from EPA’s remediation guidance. Use it as a list of things to ask about when you get a quote.

1. Find and stop the moisture. A leak, a wet crawl space or a humidity problem has to be identified and corrected, or the growth returns.
2. Contain the work area. EPA’s guidance calls for limited containment for roughly 10 to 100 square feet of mold and full containment for more than 100 square feet, so spores stirred up by the work stay out of the rest of the house.
3. Remove what cannot be cleaned. Porous materials with growth in them, such as drywall, insulation, carpet and pad, usually come out.
4. Bag it before it travels. EPA’s guide says unsalvageable moldy materials are double-bagged in 6-mil polyethylene for removal.
5. Clean what stays. Framing, concrete and other hard surfaces are scrubbed or otherwise cleaned and then dried.
6. Dry the structure. Cleaning a surface that is still wet does not last.
7. HEPA vacuum at the end. EPA says HEPA vacuums are used for the final cleanup of the area after materials have been thoroughly dried.
8. Check the result. The provider, or an assessor you hire separately, confirms the growth and the moisture are gone before anything is closed up.

Water Damage Cobb County certifies no one and checks no one’s training. If a provider says it follows the S520 or holds an IICRC credential, ask to see the certificate and note who issued it.

The clock after water gets in

Mold after a leak is a timing problem before it is a cleaning problem. EPA says water-damaged areas and items need to be dried within 24 to 48 hours to prevent mold growth. The Georgia Department of Public Health uses the same window: its mold brochure says mold can grow within 24 to 48 hours on a wet surface or material that is not dried or discarded, and gives water from a burst pipe as its example.

The window is a guideline, not a guarantee in either direction. EPA’s own cleanup table notes that mold does not always appear after 48 hours, and that it may have started even in materials dried inside that time. The joint federal guide puts it bluntly for floods: a flooded home that was not dried within 24 to 48 hours should be assumed to have mold growth.

The outdoor air is humid for much of the year, going by the nearest long-running records, which are Atlanta’s and not Cobb County’s own. NOAA’s long-term record for Atlanta (1945 to 2018) averages 81 percent relative humidity in the morning and 55 percent in the afternoon across the year, and July, August and September mornings average 86 to 87 percent. NOAA’s hourly normals for July 15 at Atlanta Fulton County Airport show a 6 a.m. air temperature of 71.5 degrees against a dew point of 68.3, about three degrees apart, which is close to saturated at dawn. EPA’s indoor target for preventing mold is below 60 percent, ideally 30 to 50.

That is why the pages that deal with water are the ones that stop mold before it starts. If the water is still on the floor, go to emergency water removal in Cobb County. After a creek or storm flood, see flood damage restoration in Cobb County, and after a drain or sewer backup, see sewage cleanup in Cobb County.

What you can handle yourself, and when to call

Not every patch of mold needs a provider, and the agencies say so. They do not agree on one number, though, so here are the published thresholds side by side, starting with EPA’s mold cleanup guidance.

Source	Size of the moldy area	What it says
EPA, mold cleanup guidance for homes	Under about 10 square feet, roughly a 3 foot by 3 foot patch	In most cases the householder can handle the job
Georgia Department of Public Health brochure	Surface mold smaller than 3 feet by 3 feet on hard plastic, tile, wood and some drywall	Can usually be cleaned by the homeowner; consult a professional for larger areas
FEMA mold brochure for flood-damaged homes	More than 25 square feet, visible and out-of-sight growth together	Consult a professional contractor
EPA remediation guide	Roughly 10 to 100 square feet	Limited containment during the work
EPA remediation guide	More than 100 square feet	Full containment during the work
Flood cleanup field guide linked by Georgia DPH (2008)	More than 100 square feet	Reports that EPA and CDC recommend trained mold remediation professionals

If you do it yourself

The joint federal guide gives the minimum gear for anyone handling wet or moldy materials: an N-95 respirator, goggles and protective gloves. Georgia DPH lists the same three items. Do not touch mold or moldy items with bare hands.

Some people should not do this work at all. The federal guide says children should not take part in cleanup, and that people with asthma, other breathing problems or weakened immune systems should stay out of moldy spaces. Georgia DPH adds that people who are sensitive to mold should not do the cleaning.

The method is plainer than most people expect. EPA’s routine method for hard surfaces is scrubbing with detergent and water and drying completely. EPA does not recommend bleach or other biocides as a routine part of mold cleanup, and Georgia DPH says a bleach solution may be used to disinfect after cleaning but does not stop mold from coming back. If you do use bleach, never mix it with ammonia or other cleaners, because the fumes are toxic.

• Do not paint or caulk over mold. EPA says the mold is cleaned off and the surface dried before any painting. Covering it does not stop the growth.
• Do not run fans once growth is visible. Federal guidance says fans can spread mold that has already started.
• Do not keep soaked carpet. FEMA’s brochure says carpet that is soaked or already moldy is discarded.
• Do not work around wet wiring. FEMA says the main power should be off if wiring is wet or moldy.

When to call instead

Call when the area is past the thresholds in the table, or when you cannot tell how far it goes. Call when the heating and cooling system is involved: EPA says a system touched by flood water must not be used to help dry the house. And call when the water was sewage or flood water. EPA’s advice in that case is a professional with experience cleaning and fixing buildings damaged by contaminated water, not a household job.

Tenants and landlords in Cobb County

A renter’s first step is paper, not a phone call to the county. Report the leak and the mold to the landlord in writing, date it, and keep a copy along with photographs. Cobb & Douglas Public Health says its lack of authority covers rental properties as well as private residences, so the county health department is not the route for a mold complaint about a rental.

The Georgia Department of Public Health’s indoor air quality page sends renters to two resources by name: Georgia Legal Aid and the Georgia Landlord Tenant Handbook. Both are linked from that state page. This page states no legal rule about who pays for what, because that depends on the lease and on Georgia landlord and tenant law, which those two resources explain.

This matters most in the cities with many renters. Census Bureau survey estimates put about 40 percent of occupied homes in Smyrna as rented. Acworth’s 2022 Comprehensive Plan says occupied homes there went from 29 percent rented to 39 percent rented since 2010. A tenant can call the number on this page, but work on a rented home is normally the owner’s to arrange.

Published cost figures, and why quotes differ

Water Damage Cobb County sets no prices, and only a provider who has seen the job can quote it. For a sense of scale there is one dated, published national figure. These are HomeAdvisor’s own estimates from its mold page, updated June 19, 2026. They are not Cobb County prices and not any provider’s rates.

HomeAdvisor national estimate	Figure	Page date
Average mold remediation cost	$2,368	Updated June 19, 2026
Typical range	$1,223 to $3,757	Updated June 19, 2026
Per square foot, most jobs	$10 to $25	Updated June 19, 2026

Two quotes for the same house can sit far apart for honest reasons. These are the things that move the number:

• Area. Containment, labor and disposal all grow with the square footage.
• Where it is. A crawl space or an attic is slower to reach and harder to work in than an open wall in a hallway.
• How much material comes out. Cleaning framing costs less than removing and replacing drywall, insulation and flooring.
• Whether the moisture source is fixed. A quote may or may not include the plumbing repair, drainage work or dehumidification that keeps the mold from returning.
• Whether an independent assessor is used. A separate inspection before and after the work is an added cost, and some owners choose to pay it.
• The rebuild. New drywall, paint and flooring are often priced as a separate stage, sometimes by a different contractor.

Ask each provider to put the scope in writing so that quotes can be compared line by line. The Georgia Attorney General warns against any contractor who asks for full payment up front, takes only cash or refuses to give a written contract.

When a policy pays for mold and when it does not

Cover for mold in a homeowners policy is narrow. The standard ISO HO-3 form, in the 10 00 edition sample published by the Insurance Information Institute, excludes mold, fungus and wet rot. The exception is mold out of sight inside walls, ceilings or under floors that results from an accidental discharge or overflow of water, the kind of sudden plumbing loss the policy covers in the first place.

Slow damage sits on the other side of that line. The Insurance Information Institute says a policy will not pay for damage due to lack of maintenance, and the same sample form excludes wear and tear, deterioration and faulty maintenance. A real policy can differ from the sample, and many carry their own mold limits or endorsements, so read yours or call your agent before assuming either way.

Flood insurance is stricter still. FEMA’s flood insurance site says National Flood Insurance Program policies do not cover damage from mold, so a flood policyholder is expected to do everything possible to stop mold growing and spreading. The joint federal guide puts documentation before cleanup: contact the insurance company and photograph the home and belongings first.

For questions about an insurer, Georgia’s Office of Commissioner of Insurance lists a toll-free consumer number on its severe weather page. Neither this site nor a provider decides what a policy pays.

Testing, and how to know the job is done

If you can see mold or smell it, you already know what a test would tell you. Federal guidance does not recommend routine mold sampling or testing: whatever the type, it has to be cleaned up and the moisture fixed. Cobb & Douglas Public Health says the same, and Georgia DPH notes there are no enforceable state or federal standards for mold testing, so a test result has no enforceable figure to be measured against.

Some owners still hire an assessor who is separate from the remediation provider. The reasoning is simple: the firm paid to do the work is then not the one grading it, and a written report can help with a sale or an insurance file. That is a choice, not a rule, and no Georgia standard requires either one.

The federal test for a finished job needs no laboratory. The joint federal guide to mold cleanup says the work is done when there is no visible mold, no mold odor and no remaining signs of water damage. Walk the area with the provider before it is closed up, and ask to see the moisture readings on anything that was wet.

How long it takes, and whether you can stay

None of the agencies cited on this page publishes a fixed number of days for mold remediation, and none says how long to stay out of a house afterward. A figure given before anyone has seen the damage is a guess. The one published marker found for this page is for drying: FEMA’s brochure says a wet or contaminated area usually takes two to three days to dry completely, and that rebuilding should wait until then.

Whether you can stay during the work depends on three things: how much material is being removed, whether the work area is sealed off from the rooms you live in, and who in the household is sensitive to mold. A contained job in a crawl space is a different matter from open walls in a bedroom hallway. The provider you are connected with, and any independent assessor you hire, are the people to decide, and this site promises no timeline on their behalf.

Health, without the scare

The joint federal guide lists the health effects of mold exposure as asthma attacks, eye and skin irritation and allergic reactions, with severe infections possible in people with weakened immune systems. Georgia DPH says the most common health problem from mold is allergy symptoms, and that research has not established what levels of indoor exposure clearly cause serious health effects.

Color does not identify a species, and plenty of dark molds are ordinary ones. That is one reason the agencies say to remove mold whatever its type. Questions about symptoms belong with a doctor, not with a remediation provider and not with a referral service.

Where mold starts in Cobb County homes

Mold follows water, and the county has a record of both sudden and slow water. The sudden events come first below, then the parts of a house where damp lingers.

After floods

Cobb County’s Stormwater Management Division says the September 2009 flood flooded more than 1,600 homes across the county. In September 2024 Hurricane Helene dropped 11.12 inches of rain at Atlanta Hartsfield-Jackson over September 25 to 27, according to NOAA’s daily records. The flood cleanup field guide that Georgia DPH links to says to assume a building’s interior is seriously contaminated with mold if it was under water or wet for more than 48 hours.

After freezes

After the hard freeze in late December 2022, the Atlanta Journal-Constitution reported that Cobb County closed the Vinings Library and two senior centers because of burst pipes and water damage, and that the county fire department was overrun with calls about burst pipes and flooding as frozen pipes thawed. A burst pipe inside a wall is a case where water can sit unseen past the 48-hour mark.

Crawl spaces, attics and basements

Georgia DPH lists ventilating or dehumidifying attics, crawl spaces and basements among its mold prevention steps. These are spaces where damp air can linger. A flooded crawl space is harder still. The flood cleanup field guide linked by Georgia DPH, written for Gulf Coast homes and reprinted in 2008, says it has to be opened to air, with openings at opposite ends, for the house to dry. Growth under a floor often shows first as a musty smell in the rooms above.

Behind walls and under carpet

Water and mold are often out of sight. Federal guidance names the space under or behind carpet, cushions and walls, and FEMA adds air ducts, attics, basements and wall cavities. FEMA’s brochure describes draining a wet wall by taking off the baseboard and drilling holes near the floor, then checking inside the wall for mold. A stain that keeps growing after the leak is fixed is a reason to have the cavity opened.

Heating and cooling systems

Ductwork moves air to every room, so mold in the system is not a patch job. EPA says a heating and cooling system touched by flood water must not be used to help dry the house, and FEMA says the furnace is used only if the ducts were not inundated. Heating and air conditioning contractors are among the trades Georgia licenses, so the license check at sos.ga.gov applies to that part of the work.

Bathrooms and kitchens

Here the cause is usually humidity and small leaks, not a flood. EPA’s target is indoor relative humidity below 60 percent, ideally 30 to 50, and CDC says no higher than 50. Surface growth on tile or a painted wall is the kind of small patch the agencies say a householder can usually clean. Growth that returns after cleaning points to a leak or a ventilation problem behind it.

Housing age is context here, not a diagnosis. Census Bureau estimates show the 1980s were the county’s largest single decade of home building, at about 22 percent of all housing units. The census counts when a house was built, not the state of its plumbing or ventilation today, and an older house is not automatically a moldy one.

City by city

The same rules apply across the county, but the local picture differs. Each city has its own page on this site with its creeks, flood record, utility and permit office. For the county-wide picture of leaks, floods and drying, start at water damage in Cobb County.

• Marietta. The Cobb environmental health office that takes mold questions, and has no authority over homes, is here. About one home in three in the city predates 1980, by Census Bureau estimates. See water damage restoration in Marietta, GA.
• Smyrna. About four in ten occupied homes are rented, so the tenant route matters. The largest cluster of flood insurance claims in FEMA’s records for ZIP codes 30080 and 30082, 22 claims, carries loss dates of August 28 to 30, 2023. The National Weather Service’s summary of that month describes thunderstorms that stayed stationary for around six hours along a boundary from the Athens area into metro Atlanta on August 28 and over north Georgia on August 29. See water damage in Smyrna, GA.
• Kennesaw. The median home was built in 1998, by Census Bureau estimates. The city’s stormwater program names Butler Creek, Proctor Creek and Noonday Creek as the waters its storm drains discharge to. See water damage restoration in Kennesaw, GA.
• Acworth. The city on Lake Acworth and Lake Allatoona, often called the Lake City. Its 2022 plan records occupied homes going from 29 to 39 percent rented since 2010. See water damage restoration in Acworth, GA.
• Powder Springs. The city’s own flood advice is to remove all wet carpet and carpet padding as soon as possible, and to use fans and dehumidifiers to remove moisture unless mold has started to grow. See water damage restoration in Powder Springs, GA.
• Austell. Sweetwater Creek near Austell crested at 30.82 feet on September 22, 2009, the highest on the National Weather Service’s record for that gauge. In a house that has flooded before, a new leak is a reason to have a provider check behind the finishes for older moisture damage. See water damage restoration in Austell, GA.
• Mableton. About a third of homes predate 1980, by Census Bureau estimates. Nickajack Creek near Mableton has peaked above its 10-foot flood stage repeatedly in the USGS record, including in 2005, 2009, 2023 and 2024. See water damage restoration in Mableton, GA.

Checking a mold provider, and what happens when you call

With no state mold standard, the owner does the checking. The joint federal guide suggests looking for a professional affiliated with or certified by the National Environmental Health Association, the American Industrial Hygiene Association, the IICRC or the American Council for Accredited Certification. Ask any provider for these before work starts:

• Proof of insurance, sent by the insurer or agent, not a photo of a card.
• A named certification and who issued it, for the firm or for the person supervising the job.
• A written scope: which materials come out, how the area will be contained, and what is not included.
• How the moisture source will be fixed, and by whom. If that takes a plumber or a heating and air conditioning contractor, check the state license.
• How the result will be verified, and whether the provider objects to an independent assessor.
• Payment terms in writing. Full payment up front or cash only is one of the Georgia Attorney General’s warning signs.

The call itself is simple. It is free, and it connects you with a participating independent provider serving your part of Cobb County. That provider asks what happened, arranges to see the damage, gives its own quote and does the work if you hire it. Availability varies by location and demand, and you are under no obligation to hire anyone.

Sources for this page include EPA, CDC, FEMA, OSHA, the Georgia Department of Public Health, Cobb & Douglas Public Health, University of Georgia Extension, Cobb County’s Stormwater Management Division, NOAA, the National Weather Service, USGS, the Census Bureau, the Georgia Attorney General, Georgia’s Office of Commissioner of Insurance, the IICRC, the Insurance Information Institute, the Atlanta Journal-Constitution and HomeAdvisor. They were checked in October 2026. Agency pages change, so follow the links for the current wording.

Questions people ask