District E in South Lawrence West, where Rivera polled best, has 411 new voters, up 6.4 percent. Lantigua received just 27 percent of the vote in that district last month.
The flux in the voter rolls varies widely across the city's 24 voting precincts. In the Arlington Neighborhood, District C, Precinct 2, picked up 572 new voters, a 52 percent increase since 2009.
Over the same four years, District D, Precinct 4, on Tower Hill, lost 198 voters, a drop of nearly 13 percent.
Rafael Tejeda, the Election Division's bilingual coordinator, said the redistricting two years ago – when several district lines were redrawn to account for the city's shifting population – accounts for much of the fluctuation in the enrollment numbers in the districts.