Layer Estimates:

Layer: Water Quality Monitoring Stations (ID:0)
Count: 200932
Extent:

XMin: -19847369.0865398
YMin: -18855210.3265923
XMax: 20021292.7665239
YMax: 16278165.2111812
Spatial Reference: 102100 (3857)

Layer: Monthly Sample Data (ID:8)
Count: 3711664