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Mold Inspection Sciences
San Diego, California (serving all surrounding areas)

Mold Inspection and Testing in San Diego and Surrounding Areas

Helping our clients breathe easy and thrive safely in all home or work environments

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Download our Free Flood Recovery Check List

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Your Flood Recovery Questions Answered

Here’s How to Get Started When Flooding Has Impacted Your Property. This free download will help you confidently move forward with a flood recovery plan of action to ensure that you proceed the safe way and the right way.

Find the Checklist Here

You'll Love Working with Mold Inspection Sciences, Ask Our Customers

I had an outstanding experience with Mold Inspection Sciences from start to finish. I was referred by a friend who had previously used their services, and they absolutely lived up to the recommendation.

From the very first phone call, their customer service was impeccable-- friendly, responsive, and informative. The inspection itself was incredibly thorough. Xander, the expert who came out, was professional, detail-oriented, and communicated everything clearly throughout the process....

Elaine Z. Agoura Hills, CA, 3/30/2026
Mold Inspection Sciences Client Review
Tim was great to work with. He was very personable, knowledgeable and provided us good information while doing his test. He was fair in his visual assessment of tests that we should do and those we should consider in giving us pros and cons for our decisions. I would highly recommend him and Mold Inspection Sciences for mold assessments.
Martha H. Costa Mesa, CA, 3/23/2026

Xander was one of the most professional workers that I've ever had. So unlike most kids his age.he was delightful fun respectful smart clean explained everything couldn't have been better in any way ....and I can be kind of annoying so he informed me about a lot and was very understandable and that was very nice compared to many people. Who are confusing and hard to read.

Adam N. El Segundo, CA, 3/19/2026

Irwin was excellent and thorough - I had a great experience with this company and the report they produced was so detailed and helpful. HIGHLY recommend!

Rachel F. Los Angeles, CA, 3/19/2026

Xander was great. Very professional and great with pets.

James I. Yorba Linda, CA, 3/13/2026

We had to get an air quality test done in our house and we used Mold Inspection Services for this. Irwin was excellent and we were very impressed with his thoroughness and patience in answering all our questions. The whole process was very smooth and professional. Highly recommend them

Vishal B. Redondo, CA, 3/11/2026

We had to get an air quality test done in our house and we used Mold Inspection Services for this. Irwin was excellent and we were very impressed with his thoroughness and patience in answering all our questions. The whole process was very smooth and professional. Highly recommend them.

Vishal Redondo, CA, 3/11/2026

The team at Mold Inspection Sciences was extremely helpful. I emailed and called them desperate for an inspection and explained my situation. They were empathetic, and even though they were fully booked (weeks in advance), they still tried to fit me in. Both Sarita and, Kristian, went above and beyond to try to help me resolve my situation quickly. I was eventually able to get a same day mold inspection company so didn't end up using Mold Inspection sciences, but their empathy to my situat...

Gabriela G. Los Angeles, CA, 3/6/2026

Tim was prompt, knowledgeable, professional and a pleasant person to deal with. He knew what he was doing, you could tell he had a lot of experience. we were very pleased.

Jeanette B. Newport Beach, CA, 3/4/2026

Best of the best. Christian was amazing. If you need a serious mold inspection with great detail this is the company.

Daniel F. Los Alamitos, CA, 3/2/2026
Mold Inspection Sciences Client Review
Irwin was so kind, knowledgable, and professional. He did a great job and was so efficient with timing. He was also super kind to my pup, who couldn't get enough pets from him! I would definitely request Irwin again.
Beau B. Los Angeles, CA, 2/24/2026

If you need a mold inspector, look no further than Xander. He did a fantastic job. He was prompt, wildly knowledgeable, and incredibly thorough with his inspection. He took the time to explain everything clearly and made the whole process completely stress-free.

Elsa Los Angeles, CA, 2/22/2026
Mold Inspection Sciences Client Review
Tim was professional, knowledgeable, friendly and just overall wonderful! I would recommend to my clients and friends!
Molly D. Irvine, CA, 2/16/2026

We had an excellent experience with Timothy Ruddy from Mold Inspection Sciences. From the moment he arrived, Timothy was professional, thorough, and incredibly knowledgeable. He took his time inspecting every area of concern and explained the entire process in a way that was clear and easy to understand.

This has been a very stressful situation for our family, and Timothy approached it with calmness, integrity, and care. He answered all of our questions patiently and made sure we ful...

Korinna A. Costa Mesa, CA, 2/13/2026

I felt confident in Tim R.'s work because he explained the what, why, and how of my mold problem thoroughly during our appt. Having mold is a very stressful issue, so having someone be pleasant and transparent with me when I was seeking answers put my mind at ease. He was efficient in his work and communicative. I hope to never have another mold issue, but if I do, I know who to call. Thank you Tim and MIS.

Alicia D. 2/12/2026

10/10 recommend. Xander was extremely thorough with the inspection and went above and beyond answering all my questions. I felt much more at ease knowing every inch would be checked out! I love how easy it was to set up the appointment and have all the documentation in a portal.

Eliza G. West Hollywood, CA, 2/6/2026

I highly recommend Tim Ruddy with Mold Inspection Sciences. He is consistently professional, honest, and thorough in every aspect of his work. Tim’s communication is excellent—he takes the time to clearly explain findings, answer questions, and ensure you feel confident throughout the process. What truly sets him apart is his commitment to going above and beyond to support his clients, always with integrity and genuine care. It’s a pleasure working with someone who takes such pride in doin...

Michael S. Costa Mesa, CA, 2/4/2026

From the start the company has been so supportive in assisting us with our needs, scheduling a specialist to come out to walk us through the process, everything from what the process is, to inspecting and testing, to how we'd receive our results and any next steps that are suggested.

Xander, our Environmental Consultant was so helpful, even reaching out before his scheduled appointment to let us know that if we'd like he had completed his other inspection and could head over earlier...

Megan C. Los Angeles, CA, 2/3/2026

Xander came to test the potential of mold being in our home; he was thorough, kind, informative, and efficient. Looking forward to receiving the results in a few days!

Amber V. Inglewood, CA, 2/2/2026

Xander came in and did a really fantastic job. He was thorough, he explained everything well, he was great to work with.

Zachary P. Marina Del Rey, CA, 1/31/2026

Mold Investigation Methods

Moisture Detection

Moisture Detection

Mold growth requires three things: mold spores, a food source (building materials), and moisture or water. So, where we find moisture, we find mold. By locating the source of moisture and identifying hidden water intrusions, we can focus our mold investigation in the right areas.

If there was water damage from a flood, a leak, or a natural event we can inspect and assess the water damage along with identifying the presence of mold and make recommendations on the best way to return the home or office to a healthy state. 

Infrared Technology

Infrared Technology

We use FLIR infrared camera technology to enhance our inspection services. This advanced, non-invasive technology allows our inspectors to zero in and identify potential sources of moisture to more accurately determine testing and sampling areas. This will allow us to make even more precise conclusions and recommendations for action during the inspection.

Sampling and Testing

Sampling and Testing

We often get questions about how we determine which sample types to recommend, why we recommended a specific number of samples, and other questions about our sampling approach - known as our Sampling Strategy. Through the course of the assessment, our inspector will put together a Sampling Strategy specific to your property that will allow us to pinpoint problem areas, determine overall contamination levels, guide remediation efforts when needed, or in other cases rule out mold as a source of concern. If you have questions about the type of samples used or are wonder how and why specific recommendations are made, you can find tons of information in our Sampling Guides. Feel free to reach out to us with specific questions.

Certified Mold Inspectors

Certified Mold Inspectors

Performing professional, high-quality inspections requires three things—certification, education, and experience—values we do not take for granted. Each of our inspectors, consultants, and project managers is a Certified Mold Inspector (MICRO and MIS CMI). To protect your liability, property, and health, it’s important to engage the services of a professional and certified mold inspector. 

No Conflict of Interest

No Conflict of Interest

We don’t perform mold remediation, repair, or construction. We have no interest in the outcome of our inspections other than to ensure you have the information needed to return your home or office to a healthy state. Our expertise guides us, and we never have a conflict of interest regarding our findings and recommendations. We use a science-based approach and only do inspections and testing, never remediation.

Specialized Air Sampling Equipment

Specialized Air Sampling Equipment

We use industry-standard sample collection equipment, meticulously maintained, and regularly calibrated to ensure the integrity of our samples and the accuracy of the results.

142 Reviews