Samples are collected from seven locations twice per month.  Analysis includes Total Phosphorus, Total Kjeldahl Nitrogen, Ammonia-Nitrogen and Nitrate/Nitrite-Nitrogen.  This information is used in developing nutrient criteria and tracking trends.

 Historical data is available from 11 stations.  Current data is available from 7 sampling stations.  The stations are listed below in order of river mile (upriver to downriver).