The City Council approved a sixth quadrant of the city known as South Portland on Wednesday. It includes the South Waterfront neighborhood and some adjacent areas.
About 8 percent of Southwest Portland addresses are in the new quadrant. Many of their addresses begin with a zero, creating confusion for 911 dispatchers, emergency responders, and mail and package deliveries.
It will take about five years to implement the change, beginning in 2020. About 10,000 Southwest Portland addresses with be changed to South Portland.
Residents in the South Waterfront neighborhood and the Portland fire marshal pushed for the change.
"For whatever reason, a lot of people don't see a zero when it's the first, leading number in an address," Commissioner Dan Saltzman said during the first hearing on the change last week. "When seconds matter, it's important for our first responders, our 911 call dispatchers and call takers to know exactly which address they're responding to."
The original and remaining five quadrants are North, Northeast, Northwest, Southeast and Southwest.
OPB is a news partner of the Portland Tribune and contributed to this story.
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