Unscrew* the kitchen faucet aerator. Put a large pot inna sink to reduce splashing. Open both valves fully for 10 seconds. Look at what’s in the pot. Reverse the process after backwashing the aerator.
Note: Do this quarterly and you won’t be boiling your pasta in pipe mug.
*Ladies: lefty-loosie. (Watch which hand they raise on Judge Judy. It’s the other one.) Man-buns: Keep doing what the girls do.