Water Appearance - Black particles

Black particles in the water at one faucet

The particles are likely from a disintegrating washer or corrosion of the plumbing. Run the water for a few minutes to clear the particles. Unscrew the aerator, or screen, from the end of the faucet, remove and clean it and screw it back on. If the problem persists, call a plumber.

Black particles in the toilet bowl water

The black particles are likely the result of the disintegration of the float in the toilet tank. The float is especially likely to break down over time if you use an automatic toilet bowl cleaner in the tank. Replace the float or call a plumber about replacing the float.

Black particles in the water from only the hot water faucet

The particles are coming from the hot water system, such as the water heater, not the city water supply. Follow the manufacturer's recommendations for maintenance of the water heater or call a plumber.

Black particles in the cold water from all of the faucets

The black particles likely originate in the water main. Particles in the main could be loosened if there has been a fire in the area and a hydrant was opened, if there is construction in the area, or if a hydrant was improperly opened and/or closed.

Call our Customer Service Center at (414) 286-2830 Monday - Friday 7:30 a.m. - 5:00 p.m. After business hours and on weekends, call our 24-hour Control Center at (414) 286-3710. Weather permitting, we will flush the main by opening a fire hydrant and letting the water run until it is clear. When the crew has finished, let the cold water at faucets throughout the building run for a few minutes to clear the lines. Remove and clean faucet aerators and screens, and screw them back on.

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