Water Defense, the anti-fracking and safe-water activist group headed by actor Mark Ruffalo, collected samples from Oscar and Elizabeth Brown's Flint, Michigan, home last weekend and brought them to an independent lab in Cincinnati for analysis.
The results, which the group shared with NBC News, show that the water coming out of the kitchen faucet, where a filter was installed after state officials finally confirmed the lead crisis this fall, didn't contain any of the heavy metal.
But a sample of the water from the bathtub, which is unfiltered, contained 16 parts per billion, higher than the threshold of 15 ppb that federal regulators say is the point at which a water system must take action to protect public health.
"I'm over it. I really just want to leave," said Denettra Brown, who is Oscar and Elizabeth's great-granddaughter and lives in the house with her 3-year-old son, Dana, who is suffering from unexplained health problems.