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1.
Perspective: All of Earth's Water in a Single Sphere (ga.water.usgs.gov)
261 points
bkyan
14 years ago
70 comments
2.
Estimated concentrations of atrazine in agricultural groundwater (water.usgs.gov)
146 points
Jimmc414
a year ago
93 comments
3.
How much water is there on the Earth? (water.usgs.gov)
41 points
AliCollins
11 years ago
19 comments
4.
Floods: Recurrence intervals and 100-year floods (USGS) (water.usgs.gov)
2 points
radarsat1
9 years ago
discuss
5.
USGS NAWQA: Groundwater-Quality Trends (water.usgs.gov)
1 point
zoowar
14 years ago
discuss
6.
U.S. Geological Survey Endangered, Discontinued and Rescued Streamgages Mapper (water.usgs.gov)
1 point
cardamomo
4 years ago
discuss