UN Habitat produces and distributes a large number of reports, many related to health with numerous publications on water infrastructure, social inclusion, disaster management, housing issues, and climate change. Although you can buy printed reports that isn’t always necessary as many can be found for free.
Hidden Cities: Unmasking and Overcoming Health Inequities in Urban Settings (2010), produced in collaboration with the World Health Organization, provides a good overview of the history and current situation in terms of cities and health. Topics cange across the natural and build environment, social and conomic issues, food secutiy, health services, and general urban governange http://www.unhabitat.org/pmss/listItemDetails.aspx?publicationID=3049
|Diagram from Hidden Cities
| Collection of Municipal Solid Waste , Key issues for Decision-makers in Developing Countries (2011) grapples with an important problem in public health. Written in a very accessible style it answers practical questions about how too extend solid waste collection to a wider population. http://www.unhabitat.org/pmss/listItemDetails.aspx?publicationID=3231