Quality of Surface Water in Missouri, Water Year 2021

Data Report 1179
Prepared in cooperation with the Missouri Department of Natural Resources



The U.S. Geological Survey, in cooperation with the Missouri Department of Natural Resources, maintains a statewide group of stations known as the Ambient Water-Quality Monitoring Network, which includes selected streams and springs in Missouri. During water year 2021 (October 1, 2020, through September 30, 2021), the U.S. Geological Survey collected water-quality data at 72 stations: 70 Ambient Water-Quality Monitoring Network stations and 2 U.S. Geological Survey National Water Quality Network stations. Four of the stations have data from additional sampling completed in cooperation with the U.S. Army Corps of Engineers. Water-quality data provided in this report include dissolved oxygen, specific conductance, water temperature, suspended solids, suspended sediment, Escherichia coli bacteria, fecal coliform bacteria, dissolved nitrate plus nitrite as nitrogen, total phosphorus, dissolved and total recoverable lead and zinc, and selected pesticide compounds. Monitoring stations have been classified based on the physiographic province or primary land use in the drainage basin or based on the unique hydrologic characteristics of the waterbodies (springs, large rivers) monitored. A summary of hydrologic conditions, including peak streamflows, monthly mean streamflows, and 7-day low flows, also is provided for representative streamgages in the State.

Suggested Citation

Markland, K.M., 2023, Quality of surface water in Missouri, water year 2021: U.S. Geological Survey Data Report 1179, 24 p., https://doi.org/10.3133/dr1179.

ISSN: 2771-9448 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • The Ambient Water-Quality Monitoring Network
  • Laboratory Reporting Conventions
  • Surface-Water-Quality Data Analysis Methods
  • Station Classification for Data Analysis
  • Hydrologic Conditions
  • Distribution, Concentration, and Detection Frequency of Selected Constituents
  • Physical Properties, Suspended-Solids Concentration, Suspended-Sediment Concentration, and Fecal Indicator Bacteria Density
  • Dissolved Nitrate Plus Nitrite and Total Phosphorus Concentrations
  • Dissolved and Total Recoverable Lead and Zinc Concentrations
  • Selected Pesticide Concentrations and Detection Frequencies
  • Summary
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Quality of surface water in Missouri, water year 2021
Series title Data Report
Series number 1179
DOI 10.3133/dr1179
Year Published 2023
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Central Midwest Water Science Center
Description Report: vii, 24 p.; Dataset
Country United States
State Missouri
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details