Requires DEP to evaluate extending sewer service in Lake Hopatcong region; allows gross income tax deduction for septic system maintenance under certain circumstances.

This bill requires New Jersey's Department of Environmental Protection (DEP) to study within 90 days whether extending sewer service in the Lake Hopatcong watershed would significantly improve the lake's water quality. If the DEP determines sewer extension is not feasible or wouldn't improve water quality, homeowners in the designated watershed area become eligible for a tax deduction covering half the cost of septic system maintenance at their primary residence. To qualify, homeowners must submit receipts showing maintenance complied with DEP regulations, and the DEP must define the eligible geographic area and conduct public education about the deduction. The bill directly affects residents in the Lake Hopatcong watershed who rely on septic systems, offering a financial incentive to maintain them if sewer upgrades are not implemented.