When it comes to mold testing, choosing the right laboratory or service can make all the difference in getting accurate results you can trust. Each of the top five options listed below in San Diego County offers something unique—whether it’s unmatched analytical capabilities, deep local expertise, homeowner-friendly services, or complete scientific independence.
Whether you’re a homeowner seeking professional testing, someone experiencing health issues related to mold, or a DIY enthusiast, one of the option listed below will be suited for you.
1. EMLab P&K
EMSL Analytical stands out as the premier mold testing laboratory in San Diego County, located at 7725 Convoy Court. As one of North America’s leading commercial mold testing laboratories, EMSL operates 30 AIHA EMLAP and 5 A2LA accredited facilities across the United States and Canada.
Their San Diego location provides comprehensive environmental testing services, including mold analysis, indoor air quality assessments, and specialized testing for fungi, bacteria, mycotoxins, and allergens.
What sets EMSL apart is their round-the-clock availability for emergency projects and their advanced LABConnect™ system, which provides 24/7 access to lab reports and results.
The facility offers multiple reporting options and maintains extensive accreditations, making it the most reliable choice for professional mold testing in the region. You can reach them at (858) 499-1303 or visit their website at EMSL Analytical — San Diego.
2. Eurofins Lab
Eurofins Built Environment Testing, formerly known as EMLab P&K, ranks as the second-best option for mold testing in San Diego County. As the leading commercial indoor air quality testing laboratory in North America, Eurofins specializes in comprehensive lab analysis of air and surface samples for mold, fungi, bacteria, asbestos, and allergens
Eurofins supports a full range of IAQ professionals and provides precise data interpretation tools like MoldRange and MoldScore. Their expertise makes them an excellent choice for complex mold testing scenarios requiring detailed analysis
Visit them: EMLab
3. LA Testing Laboratories
LA Testing secures the third position as California’s leading laboratory for environmental and indoor air quality testing. With multiple facilities across California, including San Diego, LA Testing provides comprehensive mold testing services along with testing for bacteria, lead, VOCs, formaldehyde, and other environmental contaminants.
The laboratory maintains extensive accreditations including AIHA LAP LLC, AIHA ELLAP, AIHA EMLAP, and CDC ELITE certifications. LA Testing also offers a full range of air sampling and investigative equipment to both professionals and the general public, making them a versatile choice for various testing needs.
Their commitment to public health and environmental safety, combined with their California-focused expertise, makes them a trusted option for San Diego residents.
Visit: LA Testing Laboratories
4. PRO-LAB (DIY Mold Test Kits)
For those seeking a convenient and cost-effective do-it-yourself solution, PRO-LAB ranks fourth on our list. PRO-LAB test kits are widely available at over 40,000 retail locations, including The Home Depot, Lowe’s, Menards, Ace Hardware, and CVS.
These kits allow homeowners to determine the presence of mold, pollen, and dust mites in their homes with a simple testing process.
The PRO-LAB mold test kit provides results within 48-96 hours and includes everything needed for testing, including a petri dish and growth medium.
While not as comprehensive as professional laboratory testing, these kits offer an accessible first step for homeowners concerned about potential mold issues. The ease of use and widespread availability make PRO-LAB an excellent entry-level option.
Visit: PRO-LAB
5. RealTime Laboratories (EMMA Testing)
RealTime Laboratories rounds out our top five as a specialized facility focusing on mycotoxin testing. As the only U.S. laboratory accredited by CAP and CLIA to perform clinical mycotoxin testing, RealTime Labs offers the most comprehensive mycotoxin urine test panel available, testing for sixteen of the most common and toxic mycotoxins produced by indoor mold contaminants.
What makes RealTime Labs unique is their ability to test for Macrocyclic Trichothecenes, which can be caused by Stachybotrys Chartarum (black mold). They also offer environmental mold and mycotoxin assessment (EMMA) to test living or work environments.
The laboratory provides complimentary consultations with medical professionals to help explain results, making them an excellent choice for health-focused mold testing.
Visit: RealTime Laboratories — EMMA Test
Choosing The Right Laboratory
Selecting a mold testing laboratory depends on your needs:
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For comprehensive, fast, and highly accurate lab work, EMSL and Eurofins top the list.
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LA Testing provides strong support for both technicians and homeowners statewide.
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PRO-LAB’s DIY kits make checking for mold affordable and accessible.
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For advanced toxin testing or support with complex health concerns, RealTime Laboratories is the go-to specialist.
Each of these laboratories brings unique strengths to mold testing in San Diego County, ensuring residents and businesses have access to reliable, accurate testing services tailored to their specific requirements.
Moe is the CEO and chief mold inspector for Mold Safe Solutions – a Southern California mold inspection and remediation company serving all of San Diego, Riverside and Orange Counties.
Call or text direct for a FREE quote @ 760-818-6830
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