Black specks in tap water are often caused by rubber plumbing fittings degrading in contact with tap water chlorine and chloramines. Degraded gaskets and o-rings can gather in toilet tanks and faucets.  

Specks that can be smudged between fingertips indicate degrading rubber. Silicate or manganese is likely if it does not smear between your fingertips. Please contact our Customer Service Department to request a service visit to flush your water lines to clear silt or manganese. After flushing the mains, flush your residential lines.  

New or restored structures can have particle issues. Plumbers sometimes disrupt plumbing systems. Flushing new systems can help.