A preliminary inquiry to the extent and boundaries of subterranean waterways within the Mystery Cave System was explored. Rhodamine WT dye in 500 ml quantities was used in fluormetry determinations of surface flow to ground water basins. A Turner Model 111 fluorometer was utilized for detection purposes powered by a portable 12 volt, 220 amp hour battery-inverter system. It was shown that water entered underground passageways through sinkholes or highly creviced limestone/dolomite rock strata and reappeared several kilometres downstream. The outflow appears in the form of “springs”. The possibility exists that contaminated surface water may seep through the soil for long distances. It is obvious there is acute danger of underground contamination of municipal and private water supplies situated in this area.