Mold and mildew growth can appear throughout your home, but nowhere is more likely to suffer from excessive mold growth than your basement, due to the dark and damp nature of being underground. Mold remediation services can be complicated to complete, and so the best way to ensure that you don't have to deal with mold in your basement is to take steps to prevent mold from growing in the first place.
An important way to reduce the likelihood of mold growing in your basement is to ensure that there is adequate airflow and ventilation in the area. Following actual water damage or flooding, this means using large fans to dry the damaged areas out, but as a preventative measure you can make sure of small portable dehumidifiers to reduce the overall amount of moisture in the air. You may also want to consider installing ceiling fans for a more passive way to improve air circulation.
A good way to significantly decrease the risk of mold developing in your basement is to reduce the amount of stuff that you have stored in your basement. This is because large amounts of boxes and other items can trap moisture and block light, creating areas that are conducive to mold growth. This is especially true for large amounts of soft materials like clothes and bedding, which can hold on to moisture and can actually suffer from mold growth by themselves. In line with the above point, removing items from storage in your basement can also help improve air flow and ventilation in your basement.
As counterintuitive as it may seem, one of the best way to reduce the risk of water seeping into your basement, and thus mold and mildew growth, is to ensure that your roof's gutters are in good working order. You want to make sure that no organic debris is blocking the flow of water through them, as this can cause water to overflow and soak into the ground close to the side of your home, where it is more likely to end up in your basement. Further, check to ensure that there are no leaks in the gutters themselves and that the downspouts are carrying water far enough away from the sides of your home so that water does not seep into the ground surrounding your home's basement (or if you don't have downspouts yet installed, purchase and install them).
If you do have mold in your basement, reach out to a place like Colfax Corporation to get it removed quickly.