DNR Takes Steps to Address Water Quality Marshfield, WI (OnFocus) Phosphorus in Wisconsin’s lakes and rivers have left a quarter of the state’s 700 waterbodies below water quality, according to the DNR. To combat harmful algae growth and address the issue, the Wisconsin DNR limited phosphorus output to 1.0 parts per million (1 milligram per … Continue reading Wastewater Utility Prepared for New Phosphorus Limits