The 5 Levels of Mold Remediation: All You Need to Know

August 27, 2021

Due to flooding and other types of water damage, mold can develop in many places around your home that haven’t had the time to properly dry or undergo professional treatment to remove the cause and prevent them from growing.


When you start noticing signs of mold growth in your household, the question arises: how can you determine how bad the extent of damage is? Should you always hire an Orange County mold remediation company to deal with mold on your behalf or are there certain levels of damage you can fix on your own?

To answer all of your questions, we’ve come up with a comprehensive guide on the types and levels of mold damage. Keep reading to learn more!

What are the levels of mold remediation?

The levels of mold remediation are classified by the extent and seriousness of damage mold has caused, as well as the size of the infested surface. And here’s how they’re divided:

  • Level 1: The contaminated area is less than 10 square feet and can be fixed on your own, taking appropriate preventive measures.
  • Level 2: The infested surface is between 10 and 30 square feet and there’s a chance you can remove mold yourself.
  • Level 3: The contaminated area is 30 to 100 square feet and should be addressed professionally.
  • Level 4: The contaminated area is larger than 100 square feet, and it’s absolutely necessary to hire professional remediators.
  • Level 5: The HVAC system is contaminated and should be treated by professionals only.

What is the difference between Level 1 and Level 2 mold remediation?

Level 1 and 2 mold infestations are usually not considered dangerous and don’t always require professional removal. This is because they do not pose structural threats to the building and are unlikely to affect the residents’ health. The main difference between them is the size of the affected area and how quickly they can grow to dangerous levels.

According to the EPA, contaminated areas smaller than 10 square feet don’t always require professional engagement, and are classified as Level 1. However, DIY removal should always follow precautions, tips and techniques EPA recommends.

The same goes for Level 2, although it implies a larger surface, ranging from 10 to 30 square feet. It can be an indicator of underlying issues with air conditioning systems or plumbing, but not necessarily. Nevertheless, level 2 contaminations have a tendency of quickly advancing to level 3, and that’s why they should be inspected thoroughly.

What is Level 3 mold remediation?

Level 3 mold contamination means that mold has spread to a surface larger than 30 square feet. This is a strong indicator of more serious underlying issues, such as problems with your air conditioning systems or plumbing. If this is your case, the problem will require immediate care. Unfortunately, at this level of contamination, DIY attempts are unwise.

As a typical homeowner, you won’t be able to determine whether there is a larger mold reservoir hiding in harder-to-reach areas of your home. Moreover, dealing with this size of infestation can be hazardous both healthwise and in terms of letting the infestation spread throughout your home.

This is when you’ll need to call a pro. What a mold remediation specialist will do is professionally inspect the damage, define the scope of work that needs to be done and take actions to fix it.

Where can I find the most reliable Orange County mold remediation company?


If you’re looking to hire a trustworthy mold remediation company to rid your home of mold and water damage in San Clemente, or anywhere else in Orange County, Emergency Mold Solutions is the company for you.

Our team of fully vetted, bonded, and insured IIRC-certified specialists with years of experience are at your disposal 24/7 to answer to all of your water damage and mold issues at your convenience. Reach out to us today!