| Data Service Title | Observation Network Name | WSDL | CreatedDate | Organization | Earliest Start Date | Latest End Date |
| NWIS Ground Water Level | NWISGW | WSDL | 2008.10.30 | U.S. Geological Survey (USGS) | 1801.01.01 | 2018.03.02 |
| Streamflow data from Andrews Forest LTER | AndrewsforestLTER | WSDL | 2019.08.27 | Andrews Forest LTER | 1952.10.01 | 2017.09.30 |
| Curated Data for the Brazilian Rainforest-Savanna Transition Zone | Brazil_UCB | WSDL | 2017.09.06 | Department of Civil and Environmental Engineering at UC Berkeley | 1932.12.31 | 2014.07.30 |
| CALVIN_HHS | CALVIN_HHS | WSDL | 2018.06.22 | Aquatic Habitat, Climate, & Water Analysis Laboratory | 1921.10.30 | 1993.09.29 |
| Corpus Christi Bay Environmental Flows and Hypoxia | CCBEPDAP | WSDL | 2018.05.29 | Harte Research Institute | 1968.09.23 | 2010.11.09 |
| Cedar River Watershed Forest Snow Observations | CedarRiver | WSDL | 2015.05.13 | University of Washington | 2011.03.17 | 2011.05.25 |
| Clarksburg Study Partnership | Clarksburg_SP | WSDL | 2017.03.17 | Colorado State University | 2014.12.05 | 2017.02.28 |
| Coopercreek Watershed | coopercreek | WSDL | 2021.11.19 | Hamilton County Conservation District | 2019.12.23 | 2022.10.21 |
| Charles River Watershed Association Volunteer Monitoring Program | CRWA | WSDL | 2017.03.29 | Charles River Watershed Association | 1995.06.05 | 2015.12.14 |
| Contributing Organizations Cornell Six Mile Creek Isotopes | CUISO | WSDL | 2018.09.26 | Cornell University | 2017.01.08 | 2018.08.09 |
| Meteorological Monitoring at Duquesne University | DUQWeatherStation | WSDL | 2022.02.03 | Duquesne University - Center for Environmental Research & Education | 2021.11.12 | 2022.01.05 |
| EPA_Lake_Harsha | EPA_Lake_Harsha_Data | WSDL | 2015.10.23 | US EPA | 2009.12.30 | 2011.01.11 |
| Farmington River Watershed Association Water Quality Monitoring Program | FarmRWA | WSDL | 2017.06.08 | Farmington River Watershed Association | 2006.03.30 | 2017.05.10 |
| Florida Coastal Everglades (FCE) LTER | FCELTER | WSDL | 2020.04.14 | Florida Coastal Everglades (FCE) LTER | 1924.01.31 | 2017.12.30 |
| French River Connection Water Quality Monitoring | FRC_WQM | WSDL | 2017.09.07 | French River Connection | 2005.05.22 | 2017.05.18 |
| FSU Hydrowell | FSUHydro | WSDL | 2020.10.14 | FSU Earth Ocean and Atmospheric Science | 2020.10.08 | 2020.10.22 |
| Glacial Ridge Project | GlacialRidge | WSDL | 2011.04.25 | University of North Dakota | 2007.10.11 | 2010.09.23 |
| GLDAS NOAH 2.1 | GLDAS21 | WSDL | 2019.12.02 | NASA Goddard Earth Sciences Data and Information Services Center (GES DISC) | 2000.01.01 | 2021.04.01 |
| Lake Auburn, Maine, USA. Instrumented Buoy. | GLEON_Auburn | WSDL | 2014.10.25 | Bates College | 2013.07.25 | 2013.11.21 |
| Dorset Environmental Science Centre | GLEON_Dorset | WSDL | 2014.11.06 | Dorset Environmental Science Centre | 2014.07.08 | 2014.10.08 |
| Lake Annie Instrumented Buoy, Venus FL | GLEON_LakeAnnie | WSDL | 2016.03.07 | Archbold Biological Station | 2008.02.14 | 2016.12.31 |
| Lake Sunapee, NH, USA, Instrumented Buoy | GLEON_Sunapee | WSDL | 2014.10.28 | Lake Sunapee Protective Association | 2013.05.15 | 2013.10.16 |
| Global Rivers Observatory | GlobalRiversObservatory | WSDL | 2014.09.12 | The Global Rivers Observatory | 2009.07.27 | 2016.08.15 |
| Gongga Shan | Gongga | WSDL | 2016.11.22 | Alpine Ecosystem Observation and Experiment Station of Mt. Gongga | 2015.01.01 | 2015.12.01 |
| Hassberge catchment long-Term monitoring data | Hassberge | WSDL | 2011.12.12 | Technische University Manchen | 2008.11.07 | 2011.06.06 |
| Hydrologic monitoring data for headwaters burned in 2018 Holy Fire, southern California, USA | Holyfire | WSDL | 2020.08.07 | University of California, Riverside | 2018.11.22 | 2019.06.18 |
| Daily time series of the Ribeirao da Onca watershed, Brotas, São Paulo, Brazil | hydrocausebro | WSDL | 2020.12.04 | University of São Paulo | 2008.12.05 | 2019.09.30 |
| The Institute for Energy & Environmental Research at Wilkes University | IEER at Wilkes University | WSDL | 2013.05.14 | The Institute for Energy & Environmental Research at Wilkes University | 2010.06.03 | 2012.10.17 |
| Soil Moisture and Weather Data from Southern Rocky Mountain | iRON | WSDL | 2020.09.30 | Aspen Global Change Institute | 2012.08.20 | 2021.02.24 |
| Ipswich River Watershed Association | IRWA | WSDL | 2012.07.23 | Ipswich River Watershed Association | 1997.01.26 | 2015.12.13 |
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