Postal Code Listings for Zip Code Listings for Norwalk, Connecticut (USA)

The following are the areas codes and zip codes for Norwalk, Connecticut ?

Zip Code Listing

06850 (area code: 203)
06851 (area code: 203)
06852 (area code: 203)
06853 (area code: 203)
06854 (area code: 203)
06855 (area code: 203)
06856 (area code: 203)
06857 (area code: 203)
06858 (area code: 203)
06859 (area code: 203)
06860 (area code: 203)

Why is zip code data on an environmental science site?
In 2002 I was working on a project that correlated pollution and income for zip codes across the United States. Visitors told me the data files were very useful so I left them on the site and now update the postal information on a periodic basis even though the focus of the site is conservation.