Wisconsin water-quality data
Wisconsin water quality is monitored by state, federal, and local agencies, universities, and volunteers. The USGS data we collect are used to characterize waters, identify trends over time, identify emerging problems, determine whether pollution control programs are working, help direct pollution control efforts to where they are most needed, and respond to emergencies such as floods and spills.
All Wisconsin data collected by the USGS are stored and made available to the Nation through the public NWISWeb portal which provide access to water-resources data collected at approximately 1.5 million sites in all 50 States. Annually, the USGS finalizes and publishes the daily data in a series of Annual Water-data Reports and all of the lake data in the Annual Lake-data Report.
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Water-quality data
The NWISWeb is designed to retrieve data from the distributed National Water Information System (NWIS) databases and push the data to multiple remote webservers for display. NWISWeb strives to provide a Nationally consistent and seamless view of all USGS water data.  USGS water-quality data in NWISWeb
Daily values are summarized from time-series data for each day for the period of record and may represent the daily mean, median, maximum, minimum, and/or other derived value. Daily values include approved, quality-assured data that may be published, and more recent provisional data, whose accuracy has not been verified. Daily time-series summaries from 224 sites
Real-time data are time-series (recorded at fixed intervals) data from automated equipment and represent the most current hydrologic conditions. Measurements are commonly recorded at 5-60 minute intervals and transmitted to the NWIS database every 1-4 hours. Real-time data are available online for 31 days. Real-time water-quality data from 44 sites
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Daily values are summarized from time-series data for each day for the period of record.
Real-time data are time-series data from automated equipment and represent the most current hydrologic conditions. Measurements are commonly recorded at 5-60 minute intervals and transmitted to the NWIS database every 1-4 hours. Real-time data are available online for 31 days. |
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Current water-quality conditions
Continuous real-time surface-water-quality data
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WaterQualityWatch is a subset view of NWIS data to show current conditions only. It provides access to the most current hydrologic conditions through continous real-time water-quality monitoring data collected in Wisconsin surface waters.
Measurements include water temperature, specific conductance, pH, dissolved oxygen, and turbidity. Streamflow from WaterWatch is also included. |
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Web services for water quality
Direct access to combined data in the USGS NWIS and EPA STORET systems
Note: Public users, go to "Technical Documentation" for web service instructions |
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Looking for Tap Water Quality Information?
- For information on your tap water quality, first contact your water provider.
- Visit the EPA's Drinking Water and Health page for more public-supply facts and lists of resources
Need More Information on Wisconsin Data?
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