It leads the nation in the injection of toxic waste into underground wells.

Water is provided by five underground wells, with distribution supervised by the town's municipality.

These drain tiles would still have to carry the water away to an underground dry well or sump at least 10 feet away.

Even the large, freshwater swimming pool is supplied by an underground well (with a stone spiral staircase leading down into the depths).

The process produced a coal tar by-product that was stored in underground wells and eventually found its way into the Lake bottom.

The caissons below the foundations have shifted and water's pouring in from underground wells.

The District's source of water is underground wells.

The 100,000 residents of Teotihuacan enjoyed systems for using underground wells and for collecting rain.

This will allow the two underground wells that now service the community to act as a backup to the water treatment plant during periods of heavy use.

The petroleum in the structure is more viscous than that which is usually found in underground wells.