Visual checking/Wear protective gear
First, you need to wear protective gear. You can wear long gloves which go all the way up to the middle of the forearm, along with an N-95 respirator and a pair of goggles. It is preferable to get goggles which do not have ventilation holes.
Check the corners of the carpet
If there is water accumulated in the corners of the rooms, you need to check that area for mold spores. Remove the carpet from that area by either peeling up or folding.
Seek moist areas
Next, check the moist areas of your home such as the bathroom and kitchen for mold spores. You need to carefully check these rooms. You can look under the cabinets, on the walls, and even on the floor.
Air conditioning and furnace units
You need to check the furnace units and air conditioning units of your home for mold. This is because they contain stagnant water which might be aiding the growth of mold. Furthermore, you need to check duct systems for mold and condensation.
You can also check the basement for mold. It is advisable to look around places like the location of the washing machine, the plumbing system, and the sinks for the presence of mold.
Along with visual testing, you can also test mold spores through air testing. Simply buy two mold testing kits from your local hardware or home improvement store. It will cost you around $10 to $100. Next, you need to test the inside air and the outside air. Compare and analyse the results. Keep in mind that a 0 to 900 mold count shows that mold spores are low. If the reading is between 901 to 2500, the mold count is moderate. However, if it lies between 2501 to 25000, the mold count is high. Any mold count above 25000 is very high, and you should contact a professional right away.