The Maryland Legislature has passed a controversial bill that limits where new septic systems can be installed.

The Senate voted 32-15 Monday to accept  House of Delegates changes to the legislation, a priority of Gov. Martin O’Malley.

The bill creates a four-tiered system that limits where developers can build residential subdivisions that use septic systems rather than public water and sewer services.

Some lawmakers say the bill was significantly weakened when the Senate amended it, taking away any ability of the state to overturn county plans.

Opponents continue to argue that it usurps local planning authority and reduces the  property values of farmers who may have hoped to subdivide their property for income.