Mold testing HydroStream Co is a general contracting and renovation company working throughout Norwalk. We handle the details that matter, from the first call to the final walkthrough, so you are not left guessing about what was found, what was fixed, or what comes next. Our team covers the area close to Excelsior Park, the streets between Norwalk Arts & Sports Complex and Norwalk City Hall, and the surrounding Norwalk neighborhoods, so we know the building stock and what to look for. Every job comes with clear documentation and paperwork you can actually use.