Marc Edwards and his team from Virginia Tech tested 269 Flint homes last summer to help uncover the major lead problem in the city's drinking water.
The team came back to Flint last month to try to retest those same homes.
They found that the city is still not meeting the federal action level for lead, 15 ppm, today. They recommend that residents continue to use water filters and bottled water for drinking and cooking.
Watch Edwards and the Virginia Tech team talk about the results of those tests below: