Inside your house:

• Check for a clogged screen on your faucet(s).
• Check for leaking faucets.
• Check your indoor shut-off valve and see if it is completely open.

Outside your house:

• Water standing in your yard, especially in dry weather, could indicate a leak in the water line between the water meter and your home. Also, walk the perimeter of your home and listen for the sound of running water to check for a leak under your house. Call a plumber if there is evidence of a leak.
  
• If you notice water coming out of the ground or street in front of your house, or in your neighborhood, there may be a main break in your area causing the pressure to drop. Call Paducah Water immediately!
• An open fire hydrant in your neighborhood can cause low pressure in nearby homes. PW will flush hydrants periodically to circulate water through the system. But, on occasion, a hydrant is opened without permission. If you suspect hydrant tampering, contact PW. 
  
• If a fire hydrant damaged (i.e. during a car accident), it could leak causing a drop in pressure.

Discolored water can be the result of natural sedimentation in pipes when they are disturbed. Increased water flow in the pipes due to a main break or an open fire hydrant can also cause discoloration. Usually the problem can be solved by allowing cold water to run until the water is clear. If this does not solve the problem and the water remains discolored, please call our Water Quality Department for further help. Discoloration does not present a health hazard. However, it is not advisable to wash clothes while the water is discolored because of the possibility of garments being stained.

The black particles in water from a specific faucet could be the result of a black washer or gasket inside the faucet itself that has degraded over time. The particles may also come from the disintegration of the black rubber portion of the faucet’s flexible, stainless steel supply hoses.

Another possibility is that corrosion inside the water heater is depositing the debris that breaks away and flows through pipes in your home. Follow the manufacturer’s instructions for maintenance on the water heater. Flushing out the water heater, as well as the faucet water lines, may get rid of the particles.

Source: https://www.hunker.com/13417655/what-are-the-small-black-particles-clogging-my-water-faucet