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USGS Water-Quality Data for Wyoming

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Questions or concerns about USGS streamflow data in Wyoming and Montana can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).

UPDATED October 1, 2020: USGS current stream monitoring information will continue at the following sites with funding from partner agencies and USGS Cooperative Matching Funds: UPDATED July 12, 2020: USGS current streamflow monitoring information will be discontinued at the following sites effective August 1, 2020:
  • 06289600 West Pass Creek near Parkman, WY (37 yrs)
  • 06289820 East Pass Creek near Dayton, WY (37 yrs)
  • 06297500 Highline Ditch near Dayton, WY
  • 06311400 North Fork Powder River below Pass Creek near Mayoworth, WY (46 yrs)
  • 06392900 Beaver Creek at Mallo Camp near Four Corners, WY (37 yrs)
  • 06392950 Stockade Beaver Creek near Newcastle, WY (37 yrs)
  • 06429500 Cold Springs Creek at Buckhorn, WY (37 yrs)
USGS monitoring activities at these sites had been supported through June 30, 2020 with funding from our partner agency and USGS cooperative matching funds. Without funding from another partner, current water-resources information from these sites will no longer be available from the USGS. Historical data will continue to be available from USGS. Questions or concerns can be directed to Kirk Miller (kmiller@usgs.gov; 307-775-9168).

(31 sites)

Current conditions at selected sites based on the most recent data from on-site automated recording equipment. Measurements are commonly recorded at a fixed interval of 15- to 60-minutes and transmitted to the USGS every hour. Values may include "Approved" (quality-assured data that may be published) and/or more recent "Provisional" data (of unverified accuracy and subject to revision). Most current data are provisional.

(31 sites)

The same data accessed by the Current Conditions link above but including both active and discontinued sites with data for any part of the period October 1, 2007, through the present. Values may include "Approved" (quality-assured data that may be published) and/or more recent "Provisional" data (of unverified accuracy and subject to revision).

(147 sites)

Summary of all data for each day for the period of record and may represent the daily mean, median, maximum, minimum, and/or other derived value. Values may include "Approved" (quality-assured data that may be published) and/or more recent "Provisional" data (of unverified accuracy and subject to revision). Example.

Statistics
(141 sites)

Statistics are computed from approved daily mean data at each site. These links provide summaries of approved historical daily values for daily, monthly, and annual (water year or calendar year) time periods.

(6,738 sites)

Data from field and/or laboratory analyses of water samples, biological tissue, sediments, or other environmental samples. Data include approved, quality-assured data that may be published, and more recent provisional data, whose accuracy has not been verified.

Introduction

The U.S. Geological Survey's (USGS) National Water Information System (NWIS) is a comprehensive and distributed application that supports the acquisition, processing, and long-term storage of water data. Water Data for the Nation serves as the publicly available portal to a geographically seamless set of much of the water data maintained within NWIS (additional background).

The USGS collects and analyzes chemical, physical, and biological properties of water, sediment and tissue samples from across the Nation. The Water Data for the Nation discrete sample data base is a compilation of over 4.4 million historical water quality analyses in the USGS district data bases through September 2005. The discrete sample data is a large and complex set of data that has been collected by a variety of projects ranging from national programs to studies in small watersheds. Users should review the help notes and particularly the data retrieval precautions before beginning any retrieval or analysis of data from this data set. Additions of more current data, modifications to ancillary information, and enhanced retrieval options to help users find and appropriately use the data they need are planned for a future release of Water Data for the Nation.

At selected surface-water and groundwater sites, the USGS maintains instruments that continuously record physical and chemical characteristics of the water including pH, specific conductance, temperature, dissolved oxygen, and percent dissolved-oxygen saturation. Supporting data such as air temperature and barometric pressure are also available at some sites. At sites where this information is transmitted automatically, data are available from the current data system.

Once a complete day of readings are received from a site, daily summary data are generated and made available online. USGS finalizes data at individual sites on a continuous basis as environmental conditions and hydrologic characteristics permit.

You may find additional water-quality data of interest in EPA STORET.

Tutorials explaining how to perform water quality retrievals and understand the results of current data and discrete water-quality measurements.