WPLMN reports and data

Download the most current data on annual, average, and daily pollutant loads from the Data Viewer.

Major watershed pollutants

Yields and flow weighted mean concentrations by monitoring site watershed

Total nitrogen

Nitrate+nitrite nitrogen (NO3+NO2 – N)

Total Kjeldahl nitrogen (TKN)

Total phosphorus (TP)

Dissolved orthophosphate phosphorus

(In 2016: Not sampled at all sites and permanently discontinued for subwatershed sites)

Total suspended solids (TSS)

Mississippi River Basin

Pollutant loads as a percent of the load measured at Lock & Dam #3 near Red Wing, Minn.

Runoff/precipitation maps and data

Statewide variation in precipitation, the amount of that precipitation that ends up as runoff, and the ratio between runoff and rainfall (runoff ratio).