Overview of components for teaching the public about water harvesting systems: http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/WERF_Successful%20Public%20Education%20Systems.pdf
Examples of water harvesting manuals that could be adapted for your community:
EPA Rainwater Harvesting Manual, Municipal Handbook http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/EPA_gi_munichandbook_harvesting.pdf
Drylands in general at http://www.harvestingrainwater.com/rainwater-harvesting-inforesources/
Arizona http://wrrc.arizona.edu/publications/water-harvesting/city-tucson-water-harvesting-guidance-manual and http://wrrc.arizona.edu/publications/water-harvesting/harvesting-rainwater-landscape-use
Texas http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/TWDB_The%20Texas%20Manual%20on%20RWH.pdf
New Mexico http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/SSCAFCA_Rainwater%20Harvesting.pdf
California http://wrrc.arizona.edu/sites/wrrc.arizona.edu/files/COSD_Rainwater%20Harvesting%20Guide.pdf