Tucson Water Damage Advice Call (520) 795-0505 Call
Guides

Mold after water damage

Dry water-damaged areas and items within 24 to 48 hours; in most cases mold will not grow if they are dried within that window.1

Last reviewed October 24, 20266 sources, numbered in the textSee sources

Call (520) 795-0505

Free service. Call now and we'll connect you with a local restoration company. How it works

The clock

The window is about two days

The EPA's guidance, laid out as a timeline.

0 h24 h48 h24–48hours to get it dry
  1. Hour 0Water stops. Safety first, then photographs.
  2. Hours 1 to 24Remove standing water, start air moving, call for help.
  3. 24 to 48 hoursThe EPA's window to have wet materials dry.1
  4. Closed up for daysThe CDC says to assume mold is present in a flooded home that has been closed up for several days.2

  • Porous materials such as carpet and ceiling tiles may have to be thrown away if they become moldy, because mold gets into the crevices.3

  • If a moldy area is larger than about 10 square feet, or there was a lot of water damage, the EPA points to its guide for larger remediation jobs.3

  • Mold is likely to come back if the moisture source is not fixed.1

What kind of water is it

Not all water is the same

Restoration companies sort water into three categories under the IICRC S500 standard. The category decides the protective gear, the procedure and the price, and one loss can involve more than one.4

  1. Category 1Clean source

    Water from a clean, sanitary source that poses no significant health risk.4

    A failed supply line or an overflowing cooler usually starts here. It is still on a clock: the EPA wants wet materials dry within 24 to 48 hours.1

  2. Category 2Significantly contaminated

    Water with significant contamination that can cause discomfort or illness.4

    Treat water that came in from outside, or sat on a garage floor, as suspect. Pima County warns that water entering a garage or home may carry hazardous materials.5

  3. Category 3Grossly contaminated

    Grossly contaminated water that can carry harmful pathogens or toxins, often called black water.4

    Sewage is the clear case. The EPA says to call a professional with experience in that kind of damage.1

A monsoon roof leak is not automatically Category 3: in March 2026 the committee behind the S500 standard said weather-related and top-down water should be judged from what is found at the site.6 If a company calls a roof leak a worst-case job, ask what they found.

How this works

What happens when you call

It is free to call, and calling commits you to nothing.

  1. A woman on the phone in her kitchen, wet towels and a bucket on the counter under a stained ceiling, a saguaro outside the window.
    1

    You call

    Tell them what happened and where. Have the address ready.

  2. 2

    We connect you

    A call network puts you through to an independent local restoration company that serves Tucson and is taking calls.

  3. A technician points to a water stain beside a ceiling vent while a homeowner listens.
    3

    They assess and quote

    If you want a visit, they look at the damage and quote their own price. Ask for it in writing.

We are a free referral service, not a contractor. The company that answers sets its own prices. How this service works

A couple sit together on their couch with coffee as a fan dries the tile floor.

Want a local company to look at it?

Free to call. An independent restoration company that serves Tucson answers, and you decide what happens next.

Call (520) 795-0505

Tucson Water Damage Advice is a free referral and information service, not a contractor. Calls are answered by independent local restoration companies through a pay-per-call network, and we may be paid when a call qualifies. We do not do the work and do not set prices or availability. How it works

Sources

Each numbered note on this page points here. We read every page on October 24, 2026. Where sources disagree we say so; where we could not find a source we left the claim out. We are not affiliated with any of these organizations.

  1. U.S. EPA, A Brief Guide to Mold, Moisture and Your Home. Page updated February 18, 2026. www.epa.gov/mold/brief-guide-mold-moisture-and-your-home
  2. CDC, Safety Guidelines: Reentering Your Flooded Home. Page updated August 24, 2026. www.cdc.gov/floods/safety/reentering-your-flooded-home-safety.html
  3. U.S. EPA, Mold Cleanup in Your Home. No date shown. www.epa.gov/mold/mold-cleanup-your-home
  4. Cleanfax (trade magazine), Jeff Cross, "Understanding Water Damage Categories". May 6, 2025. cleanfax.com/water-damage-categories/ Summarises the IICRC S500 categories. We have not reproduced the S500 standard itself, which is sold by IICRC.
  5. Pima County, AZ, Storm & Flooding. No date shown. www.pima.gov/459/Storm-Flooding
  6. IICRC, ANSI/IICRC S500 Consensus Body Issues Position Statement on Category of Water Damage and Weather-Related Events (press release). March 16, 2026. iicrc.org/wp-content/uploads/2026/04/Weather-Related-Water-Damage-Position-PR_March-2026.p…
Call (520) 795-0505Free service. We'll connect you with a local restoration company. How it works