The New Castle News reports Friday that the incident happened just after midnight early Wednesday.
Police say a woman and her brother were squirted with chlorinated water and called police who traced the license plate to one of the suspects.
Police say the four teens in the car acknowledged wetting the others with squirt guns and were charged with harassment and disorderly conduct.
The parents of one of the teens cited will also be charged for allegedly yelling at and insulting officers who were questioning the teens.