BAY SHORE - Suffolk County's massive budget deficit could jeopardize programs that keep the county's drinking water clean and safe, environmentalists say.County Executive Steve Bellone's (D-Suffolk) proposed budget would lay off five hydro-geologists from the county's health department, along with their assistants. The cuts amount to one-third of the program's entire staff.The experts keep watch over 10,000 private water wells, Superfund sites, sewage plans and compost farms to monitor for harmful chemicals and other problems.The chairman of Suffolk's health committee says the positions are needed and the county should look for cuts elsewhere.Suffolk Legislature approves plan to layoff 315 county workersBellone outlines fiscal recovery plan in State of the County speech