Figure 1.2

Use the vertical slider (square in upper right corner of figure) to control base-map opacity.

Use layer icon (bottom right) to select constituent and to select display of summary pie charts or individual wells.

Click on each individual pie chart for local detailed information.

EXPLANATION

[>, greater than; <, less than]

Pie charts and wells, with colors indicating concentration relative
to Human Health Benchmark (HHB)

High: >HHB
Moderate: 0.5 HHB to HHB
Low: <0.5 HHB

Note: There are fewer recorded measurements for Nitrate and
Radium-226 + Radium-228 wells.

Figure 1.2. Summary of decadal network Cycle 3 (2012–22) groundwater-quality results in the conterminous United States.