Hundreds of thousands of homes in the Southeast may have had their wells inundated by record-level floodwater resulting from major hurricanes this year, yet only a fraction have been tested for harmful contaminants. That’s because North and South Carolina, Florida and Georgia — like most other states — don’t require routine testing of private wells. Lawmakers have long been hesitant to put requirements on wells on private property.Hurricanes Florence and Michael dumped more than 30 inches of rain on some areas stretching from Florida to North Carolina, creating a toxic soup that may have overwhelmed the nearly 650,000 homes in those areas that rely on well water, according to estimates from the National Groundwater Association.