Data references can be found here.

This applet lets you zoom into any area of the state of PA and exam the autism prevalence in any of the 501 school districts. The applet lets you zoom and pan into the data. It also lets you search on the name of any school district and zoom directly into that school district. You can turn on or off the school district labels. You can toggle between the different years data (2001, 2002, 2003) to exam the trend of the autism prevalence. You identify any autism hot spots and click on the spot and view the raw prevalence data. Warning: this applet is very large (3.5 MB) so it is only recommended for those with a broadband connection. I have included a small screen shot below so you get a feel for what the applet looks like with out loading the entire applet. I also recommend that you visit www.java.com and install the latest Java Runtime Environment for your browser.

Click here to start applet. Please be patient...

2000 School Districts - Unified Cartographic Boundary Files
Toxics Release Inventory (TRI) Program
National Center for Education Statistics
EPA Mercury Maps

PA MS Excel - All Disabilities Source Data
Image PA Autism GIS Map - 2001
Image PA Autism GIS Map - 2002
Image PA Autism GIS Map - 2003

Massachusetts (IDEA data) and Rhode Island (IDEA data) - Professor of Psychology Dr. Grace Baron, Wheaton College

California (CA DDS data) and Michigan (IDEA data) - Dr. Diana Cregar, Institute for Community and Regional Development (ICARD)

Texas (TEA data) - by Dr. Raymond Palmer, Assistant Professor University of Texas Health Science Center at San Antonio