He nods as Data tells him the readings. "It's pretty foul. When we get a good rain, give that a scan-- things here get flushed out into the water supply, and if they don't make it back into the system, they get evaporated and then rain back down over everything. They haven't quite figured out that they might not want to pump their air and water full of chemicals and heavy metals. Are the pockets concentrated in any particular areas, around people?"