I rented a retail space, and I think there is mold. Should I be worried about my customers?

Of course. Damages in commercial cases involve not only personal injury, but also potential loss of use and business interruption. One expert has said that claims that would have been brought under the umbrella of “sick building syndrome” if diagnosed years ago, would actually fall squarely in the toxic mold arena if brought in today's legal environment. Measures adopted during the energy crisis to make buildings more energy efficient actually mean buildings are unable to breathe. These strict codes and efforts to make the buildings watertight have resulted in structures that trap mold within the building and circulate it throughout the system.