Program type providing dataset | Number of datasets | Type of sampling | Spatial resolution | Temporal range of data | Temporal resolution |
---|---|---|---|---|---|
Federal agency | 7 | Survey | US | 1991 - 2007 | Single summer sample |
 | 7 | Long-term | Single lake - Regional | 1984 - 2011 | Weekly - Yearly |
LTER program | 5 | Long-term | Single lake - Regional | 1967 - 2013 | Weekly - Monthly (up to all year) |
State agency | 14 | Survey | State | 1937 - 2011 | Single summer sample - Monthly |
 | 14 | Long-term | Watershed - Regional | 1984 - 2011 | Weekly - Yearly |
Citizen monitoring program | 6 | Survey | Regional - State | 1989 - 2011 | Single summer sample - Monthly |
 | 4 | Long-term | Regional - State | 1974 - 2012 | Monthly - Multi-years |
Non-profit agency | 3 | Long-term | Regional | 1990 - 2011 | Monthly - Multi-years |
Tribal agency | 5 | Long-term | Regional | 1998 - 2011 | Â |
University research program | 16 | Long-term | Single lake - Regional | 1925 - 2011 | Single summer sample - Weekly (some fall and winter samples) |