WSSC says that if you live in Hyattsville, Bladensburg, Mt. Rainier, Cheverly, Chillum, Edmonston, Landover Hills, Glen Arden, Fairmount Heights, Seat Pleasant or Brentwood, you should bring your water to a rolling boil for 1 minute before:

  • Drinking it;
  • Making ice;
  • Washing dishes (without a dishwasher);
  • Brushing your teeth;
  • Cooking.