FARGO (AP) - Trace amounts of chemicals and drugs found in tests of Fargo's drinking water are too small to be a public health danger, but the city will continue monitoring its water, an official says.

Fargo Enterprise Director Bruce Grubb said four compounds were found, including caffeine and a nicotine byproduct found in cigarettes. But he said a person would have to drink 2 million glasses of water to get the equivalent of the amount in one cigarette.

An Associated Press examination of hundreds of instructions provided with prescription medications found that Americans are almost never told how to safely dispose of unwanted drugs, despite evidence that medications flushed down the toilet damage the environment and eventually reach drinking water supplies.