Black River Radon locally owned and operated. We are a Licensed, Insured and bonded Ohio Radon company. Experts in Radon Mitigation, Radon Testing/ Retesting and Repairs to existing systems. Radon problem is not a problem at Black River Radon we will get your levels to a safe level and we will guarantee it for two years. We offer warranty and extended warranties on every system. All work is done by a Licensed Expert. Military discounts to honor our hero's.