Assessment of water-quality constituents monitored for total maximum daily loads in Johnson County, Kansas, January 2015 through December 2018

Abstract

Horizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83).Vertical coordinate information is referenced to the North American Vertical Datum of 1988 (NAVD 88).Elevation, as used in this report, refers to distance above the vertical datum. viii Supplemental InformationConcentrations of chemical constituents in water are given in milligrams per liter (mg/L).Concentrations of nitrogen species in water are given in milligrams per liter as nitrogen (mg/L-N).Concentrations of phosphorus species in water are given in milligrams per liter as phosphorus (mg/L-P).Total nitrogen is the sum of total Kjeldahl nitrogen (U.S. Geological Survey parameter code 00625, also known as total ammonia plus organic nitrogen) and dissolved nitrate plus nitrite (U.S. Geological Survey parameter code 00631).Escherichia coli densities are given in most probable number per 100 milliliters (MPN/100 mL) or colony forming units per 100 milliliters (CFU/100 mL).