City of Radford issued the following announcement on Oct. 27
Fire hydrant testing/flushing has begun. Crews will be working across the city.
During this time, and when a crew is in your immediate area, you may experience low pressure intermittently along with some discoloration in the water due the disturbance of natural mineral deposits that form on the interior walls of the water main system. This is harmless and after running your water for a short period of time, from your highest or furthest faucet from the street, it will clear it up.
Apologizes in advance for any inconvenience. If there are any changes in your normal service or if the discoloration persist, please contact Don Green at (540) 267-3149
Original source can be found here.