MILWAUKEE -

A new study has found dozens of pollutants at low levels in Milwaukee area waterways.

But in some cases, the U.S. Geological Survey found the pollutants are at high enough levels to harm fish and other aquatic life.

The Journal Sentinel reported the study found dozens of pollutants at low levels in streams, rivers, and in the Milwaukee harbor. Those pollutants range from chemicals in basic household products to airborne residue from car exhaust.

The study found the Kinnickinnic River to be especially vulnerable.

Cheryl Nenn of Milwaukee Riverkeeper said she is alarmed by the findings. Nenn said so little is known about the effect the chemicals are having in the waterways.

The study examined water samples in streams and rivers, sediments, and the harbor from 2006 to 2009.