The most severe restrictions imposed on the general public are only in place within the 20-mile (32 km) radius of the Green Bank Observatory. The Observatory actively polices the area for devices emitting noticeably high amounts of electromagnetic radiation such as microwave ovens, Wi-Fi routers and faulty electrical equipment and request citizens discontinue their usage. They possess no legal powers of enforcement (although the FCC can still impose a fine of $50 on violators), but will work with residents to find solutions.