You'll find out in today's paper, and hats off to KSTP-TV in the Twin Cities for digging out this story and doing a lot of records checks. They have a database with records from the Rochester, Cannon Falls and Red Wing school districts -- click on the interactive map here.
Here's a link to a PDF regarding the Rochester district's water records. According to the data, there were no issues with water tests at the Alternative Learning Center, Franklin, Gibbs, Hawthorne, Northrop, Riverside, Washington and a few other school buildings and properties.
And here's a portion of what the Rochester district told KSTP in response to their data request:
"In July, Rochester Public Schools conducted lead in water testing throughout the district using a third-party consultant ... over the two-week period we sampled more than 1,200 samples. Our Health and Safety Coordinator worked with our site lead engineers to take the fixtures that came back above the 20 parts per billion as required by the Minnesota Department of Health out of service. Fixtures were taken out of service immediately..."
Here's a link to the data for Red Wing High School -- no problem there, apparently -- and data from other Red Wing schools is also available.