Mold Clearance Testing and Mold Testing in Upland

When to Test for Mold and When to Verify with Mold Clearance Testing

The Importance of Mold Testing and Clearance Testing

Mold should never be underestimated as it can have health implications, including asthma attacks and other health complications according to the EPA. That's why it's crucial to conduct mold testing when there are indications of a problem and perform clearance testing after remediation. In this article we will explore the reasons, behind the importance of mold testing and clearance testing.

Call us at: 888-217-2719.

In addition to Mold Clearance Testing and Mold Testing in Upland, we provide these and many other indoor air quality services in the near-by regions of Montclair, Claremont, La Verne, San Dimas, Mira Loma, Diamond Bar, Norco, Charter Oak and Pedley.

Mold testing provides an opportunity to identify any mold related issues. This allows prompt action to be taken in order to prevent the spread of mold and minimize damage. It would be risky to proceed with mold remediation without conducting testing as it would be difficult to determine the extent of mold growth or whether your cleanup efforts were successful. Clearance testing is essential in confirming that the remediation process has been carried out effectively ensuring that mold levels have returned to an acceptable range post cleanup.

When is it necessary to conduct Mold Testing? Recognizing Signs of a Mold Problem and Identifying at Risk Areas

There are several signs that may indicate a mold issue: unusual odors, visible growth of molds, evidence of water damage or respiratory problems experienced by individuals within the space. It’s important not to ignore these warning signs. If you observe any of these indicators it’s advisable to contact a mold inspection company for further assessment.

The Environmental Protection Agency (EPA) suggests conducting tests if you notice mold growth covering an area, more than 10 feet. It is also advisable to test areas if someone in the household has a mold allergy or asthma. Testing is recommended whenever there are indications of mold as certain molds can be toxic.

There are some specific areas that are prone to hidden mold development. Musty smells around HVAC vents, windows, or exterior walls often indicate the presence of mold. Mold thrives in areas, with water damage in basements or crawlspaces. Don't forget to test attics and insulation as slow leaks can provide nourishment for mold before it becomes visible.

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Why it's Important to Hire a Professional Mold Testing Company

DIY mold test kits sold at hardware stores may seem convenient, however, there are several reasons why hiring a professional inspector is the wise choice.

The biggest reason is accuracy. Professional inspectors use high-quality commercial lab equipment to test air and surface samples. This detects lower mold levels than DIY kits. Trained inspectors know the proper methods for collecting samples to avoid false results. They can also test a wider area to find any hidden mold growth.

Professionals also know how to interpret lab results correctly. DIY testing only tells you if mold is present at the test site. An expert analyzes the type and quantity of mold to determine if it poses a health risk. Inspectors give remediation recommendations based on these details.

Hiring a professional inspecting company like A-1 Certified Environmental Services provides you with a detailed inspection report as documentation. This is essential if your home has a mold problem you later need to disclose.

Mold Inspection Process - What Happens During Testing

When you contact A-1 Certified Environmental Services to schedule mold testing, we send a certified mold inspector to your home. Our inspectors are friendly, polite, and make sure to protect your property during the inspection process.

The inspection begins with a visual examination. We check for visible mold, water stains, musty odors, and other signs pointing to a potential problem. Next, we collect air samples and swab surfaces to test for mold spores. Attics, crawlspaces, and other high-risk areas may also included.

A-1 Certified Environmental Services submits your samples to a specialized mold testing laboratory. Results are usually available within a quick timeframe. The report we provide will contain a detailed outline explaining the results, including the types and quantities of mold found. If needed, we can give professional remediation recommendations.

Interpreting Mold Test Results - Thresholds and Recommended Actions

Mold testing quantifies the number of spores per cubic meter (in air samples) or per area (in surface samples). While mold types vary, the CFU (colony forming units) thresholds below serve as general remediation guidelines.

- Outdoor levels: 0 to 1,300 CFU/m3
- Indoor levels: 0 to 500 CFU/m3
- Levels requiring remediation: Over 500 CFU/m3

A-1 Certified Environmental Services helps homeowners understand their mold inspection results. We explain which types of mold were found and at what levels. If the report shows elevated mold, we recommend contacting a certified mold remediation contractor to clean up the issue.

Even if your mold levels are normal for your region, we may advise simple steps to reduce mold growth. Examples include adding ventilation, fixing plumbing leaks, and controlling humidity. Ongoing monitoring is wise if you have health conditions like asthma that are aggravated by mold.

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Mold Clearance Testing - Verifying Mold Remediation and Ensuring Safety

Mold clearance testing should always be done after remediation is finished. This verifies that the contractor fully removed the mold to safe levels. Clearance testing is the only way to confirm your home's air quality after cleanup.


A clearance test involves repeating the same inspection process as the initial mold testing. A-1 Certified Environmental Services collects new air and surface samples to send to the laboratory. The post-remediation results must show mold was reduced to indoor levels below 500 CFU/m3.

If the clearance test results are higher than 500 CFU/m3, remediation was not successful. Any remaining elevated levels mean there is still underlying mold growth. In this case, warn your remediation company and have them re-clean the affected areas until mold spore counts are lowered to a safe range.

Mold can be a hidden threat to your home and health. Catch issues early and verify remediation through professional mold testing and clearance testing. Contact A-1 Certified Environmental Services today to schedule reliable mold inspections. Our expertise reassures homeowners that their home's air is clean and mold-free.

We provide Mold Clearance Testing and Mold Testing in Upland, we also offer several other indoor air quality services in the near-by areas of Montclair, Claremont, La Verne, San Dimas, Mira Loma, Diamond Bar, Norco, Charter Oak and Pedley.

Call us at: 888-217-2719.