Click the links below to download data and methods descriptions for the nutrient impairments and source water watersheds within the Great Lakes Basin featured in the Source Water Nutrient Impacts results page.
Click below to download data on source water protection planning across the Great Lakes Basin.
GLANSIS is an inter-agency, Great Lakes-specific database for Aquatic Nonindigenous Species (ANS) information.
The Nonindigenous Aquatic Species database is an information resource for the United States Geological Survey. Located at Gainesville, Florida, this site has been established as a central repository for spatially referenced biogeographic accounts of introduced aquatic species. The program provides scientific reports, online/realtime queries, spatial data sets, distribution maps, and general information. The data are made available for use by biologists, interagency groups, and the general public. The geographical coverage is the United States.
Click below to download a summary file of the tributary data on ErieStat.
Tributary monitoring data was used by the USGS, NCWQR, USEPA and ECCC to calculate spring and annual phosphorus loads. Annual loads were estimated at the river mouth using tributary monitoring and municipal discharge data from NCWQR, OEPA, MDEQ, USEPA, USGS, ECCC, and OMECC.
An interactive mapping platform that allows users to zoom in on subwatersheds and create detailed maps.
Heidelberg University’s National Center for Water Quality Research collects and analyzes approximately 450-500 water samples for pollutants at each monitoring station each year. From that information it calculates annual pollutant loads from each station and the loads of nutrients, sediments and pesticides delivered to Lake Erie or the Ohio River.
NOAA's Great Lakes Environmental Research Lab (GLERL) compiled information on their modeling and research on HABs and hypoxia.
A mobile friendly view of real-time water quality data. The latest NOAA cyanobacterial index image is also available.
The extent and severity of algal blooms in the Western Lake Erie Basin (WLEB) are correlated with the amount of nutrients (nutrient load) entering the WLEB from the Maumee River. Measurements of nutrient concentrations in the Maumee River are collected by Heidelberg University and combined with USGS measurements of Maumee River flow to calculate daily nutrient loads.
The Great Lakes Observing System (GLOS) provides a HABs Data Portal in collaboration with a suite of western Lake Erie partners. In this initial stage, the page provides access to real-time data from stations around the Western Lake Erie Basin, including measurements of temperature, specific conductivity, turbidity, pH, chlorophyll and blue green algae. Upcoming enhancements will add access to grab sample data, satellite imagery, hydrodynamic model results, and meteorological observations.
The Water Finance Clearinghouse allows communities to access information and resources for water infrastructure and services, including funding sources and reports. The Clearinghouse contains information on watershed protection and source water.
The Minnesota Department of Health provides GIS shapefiles on drinking water protection area, as well sampling results of manganese, radionuclides, nitrates.
This Watershed Boundary dataset for Michigan lists the hydrologic units for watersheds in Michigan.
The USGS Water Use Data for the Nation includes data on water use across the United States.
The USGS's Daily Streamflow Conditions dataset includes data on streamflow at 9,936 sites across the United States.
The Streams and Waterbodies of the United States data layer shows the location of water features throughout the United States, Puerto Rico, and U.S. Virgin Islands
The STORET Data Warehouse is the EPA's repository of the water quality monitoring data collected by water resource management groups across the country.
The Principal Aquifers in Lake Michigan Basin dataset contains the shallowest principal aquifers of the Lake Michigan Basin.
The NHD displays the drainage network, specifically rivers, streams, canals, lakes, ponds, coastline, dams, and streamgages in the United States.