FARGO (AP) - North Dakota's largest city late this week will begin testing for traces of pharmaceutical drugs in drinking water supplies.

The decision comes in the wake of an Associated Press investigation that detected antibiotics, sex hormones, mood stabilizers and over-the-counter pain medicines in water supplies of several dozen major cities.

"What we decided to do was (sample) our two source waters, the Red and Sheyenne rivers, as well as treated drinking water coming out of the water treatment plant, that we're putting out to our customers," said Fargo enterprise director Bruce Grubb.

Fargo has hired a University of Iowa lab to do the testing. Grubb has said that if the sampling shows drugs in the water, the city's treatment plant has the ability to handle it and that the city will do whatever is needed to either break down the compounds or remove them.

The federal government does not require any testing and has no set safety limits for drugs in water.