Mold needs 3 things to grow: moisture, humidity, and food source. It mostly grows in homes and buildings with excessive moisture since it thrives in warm and humid conditions. If you are not sure whether you have mold growth or a discoloration issue, you should collect samples and submit them to be tested by a qualified environmental testing laboratory for analysis. At Indoor Doctor, we can conduct mold testing via surface, air, or bulk samples. You can either schedule an appointment where one of our air quality testing technicians will collect the samples, or you can do it yourself via our virtual air testing services.