Shield: Derived from the Provincial Seal of Ilocos Sur where the town is located.

Mortar & Pestle: Items known to be produced and crafted in the Municipality.

Fish: Represents the abundance of Yellowfin Tuna, a primary source of livelihood in the coastal barangays.

Virginia Tobacco Leaf: Symbolizes the main source of income of the townspeople.

1910: Year when the Municipality was created; also the year when D. Juan Hernaez was appointed as first municipal president.

Ten Stars: Depict the number of barangays that comprise the Municipality.