Water levels were measured in wells at the decommissioned Naval Air Warfare Center in West Trenton, N.J., during 2000. Water-level hydrographs prepared from data collected at seven observation wells on the base show changes caused by seasonal and daily climate conditions and by the pumping of contaminated water from recovery wells. Stressed and unstressed potentiometric surfaces for 2000 are similar in shape to those during 1995–99, but are not as deep. The greatest differences between the potentiometric surfaces in 2000 and those in 1995–99 were caused by turning off sump pumps in NAWC buildings when the base was closed.