The crisis with water in Flint, Michigan that began in 2014-2015 has brought drinking water infrastructure to the fore as an environmental justice issue, particularly in aging "Rust Belt" cities, many of which are among the country's most segregated.
There is no shortage of information about Flint's problems with water on the Internet, but it may be harder to find materials specific to Milwaukee or other midwestern cities.
If you would like to look at Milwaukee's issues with drinking water and social/environmental justice, one good place to start is the relatively new Freshwater for Life Action Coalition. Here is a series of WUWM reports from February 2017:
http://wuwm.com/post/coalition-calls-mayor-barrett-speed-solution-milwaukee-s-lead-pipe-problem#stream/0
Here are some articles from local news (Fox 6):
http://fox6now.com/tag/freshwater-for-life-action-coalition/
This Facebook page is a very good source of information:
https://www.facebook.com/events/1170188983031882/?active_tab=discussion
And if you follow the leads provided in these articles, they are likely to lead you to still more:
https://hngwiusa.wordpress.com/2016/12/12/flac-challenges-milwaukee-city-attorneys-opinion-that-city-doesnt-own-toxic-lead-laterals-connected-to-homes/.
