Layer Estimates:

Layer: Water Quality Monitoring Stations (ID:0)
Count: 203245
Extent:

XMin: -19708080.5736847
YMin: -1615463.84759304
XMax: 16232964.2585262
YMax: 11528794.5874085
Spatial Reference: 102100 (3857)

Layer: Monthly Sample Data (ID:8)
Count: 3898718