Most of monitoring wells are shallow dug wells. Many went dry in 1998 which was a very dry year.

There is not an obvious trend of ground water storage depletion. Water levels seasonally fluctuate in response to recharge and pumping but in the six years period, 1994 through 1999, the levels have returned to the levels in 1994.

The sketch map shows water levels, expressed as absolute elevations above sea level in metres, for Pedro Plain in January 1998. In most wells, this corresponds to low levels. Indicative is that water levels are just above the sea level, making this ground water system vulnerable to sea water intrusion in the case of further lowering of water levels. (The higher elevation of water levels at Treasury Beach, 9.3 m, is questionable since exact ground surface elevation at that site is not known.)

The absolute elevations of water table (level) within the Upper Morass and southeast toward Goshen-Pepper area points at water table in limestone aquifer to be between 5 and 6 m AMSL. Again, these are low levels from January 1998. The maximum levels (end of 1999 and spring of 2000) are between 1 and 2 metres higher

The well south of Lacovia, points at low water levels at a distance of some 10 km northeast of the sea. The levels fluctuate between 0.7 and 2.1 m AMSL. It is easy to forecast an advance of brackish water resulting from the sea water intrusion should the abstraction in the Lacovia area be sharply increased.