FatterDumber& Happier Moe wrote:

Where did I say that I was on well water? I'm not.

Where did I say you waz?

You said:

You just might be drinking your eighbor's sewage
or the chemicals he sprayed on his lawn.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

How could I be "drinking the chemicals he sprayed on his lawn" if both
he and myself are served by a municipal water source? Even taking into
account that I don't have a trap on my dish washer drain line?

And you didn't respond to the other comment I made about your last post:

It is possible that an incorrectly installed dishwasher (or
anything) could be contaminated with sewage or chemicals,
then an improperly connected water supply via the plumbing
can back feed to the public water system causing contamination
of the public water supply system.

So how exactly can contaminated water overcome the somewhat high water
pressure of the municipal water system and backfeed into my water pipes
and spread to adjacent houses?

Wouldn't I need

a) a tank of at least 5-10 gallon capacity, filled with dirty water
b) a compressor or pump to take that water and inject it
at high pressure back into my main water supply line
c) the intent to put those items together and make it happen

How else could contaminated water flow back into the water supply
system?