Protecting Lakes Against Quaggas Act of 2014 or the PLAQ Act of 2014 - Amends the federal criminal code to prohibit the importation into or shipment within the United States of the species of mussels of the genus Dreissena (thus covering quagga mussels). (Currently, the prohibition applies to only the zebra mussel of the species Dreissena polymorpha.)
Makes this Act inapplicable to: (1) the importation or transportation of prohibited species through the operation of a public water system or a related facility, or (2) the possession or conveyance of water supplies containing such species by a public water system operator.