Looking for a mold remediation company in Marissa, IL? Describe your project once and up to five mold remediation pros who work in Marissa and St. Clair County get back to you with a quote. It's free and there is no obligation.
Marissa is home to about 1,743 people (2024 Census Bureau estimate), a shrinking community (−4.9% since 2020). With 242 people per sq mi, it is a semi-rural area. Leaks, humid summers, basements and crawl spaces are the usual sources of mold problems in local homes.
Marissa at a glance
- Population (Census Bureau estimate, 2024)
- 1,743 (−4.9% since 2020)
- Rank in Illinois
- 504th of 1,294 cities and towns
- Land area
- 7.2 sq mi
- Population density
- 242 people per sq mi (semi-rural)
- Type
- Village (Marissa village)
- Main county
- St. Clair County
What to check before hiring in Marissa
- License: in Illinois, check whether the state licenses mold assessors and remediators.
- Independence: where allowed, an assessor separate from the remediator gives a neutral scope and clearance.
- Moisture first: the quote should say how the source of moisture is fixed.
- Price drivers: area affected, containment, materials removed and HVAC cleaning.
Useful official resources
Services available in Marissa
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Mold remediation
Containment, removal and cleaning of mold growth, with the moisture source fixed.
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Mold inspection and testing
Independent inspection, moisture mapping and sampling before or after remediation.
Frequently asked questions in Marissa
How much does mold remediation cost in Marissa, IL?
It depends on the size and location of the growth and the materials to remove. Describe the problem: pros who serve Marissa reply with a quote.
How long does it take?
Small jobs take a day or two; larger ones with drying and rebuilding take longer.
Will the mold come back?
Not if the moisture source is fixed. Ask what the pro recommends to keep the area dry.
Which mold remediation pros will contact me?
Up to five independent mold remediation pros who serve Marissa and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.