The likely break-through case based on a rapid test follows a known exposure in Gov. Phil Murphy's house, within days of the family returning from vacation, according to a statement.
The county has been working on garbage pickup in Manville since the Tuesday after the storm. The county transfer station in Bridgewater reached capacity three days later.
The president met officials in Hillsborough and families in Manville and says the damage caused by Ida underscores need to improve America's infrastructure.
Two houses and a banquet hall exploded in Manville following the flooding from the remnants of Hurricane Ida where rising waters from three rivers stopped firefighters from reaching the burning structures.