Figure 2.

Simulated water-quality response to widespread contaminant input at the water table in a public-supply well producing water with different age distributions in each of four study areas. (1) Connecticut study well: <15 years between recharge at the water table and discharge at the well; (2) Florida study well: 1 day to 125 years between recharge and discharge; (3) California study well: 10 to 1000s of years between recharge and discharge; and (4) Nebraska study well: mix of water recharged between 10s and 1000s of years before discharge (Eberts et al. 2013).