What formatting error has been made in the passage?

The paragraphing is incorrect.
The closing is incorrectly placed.
The subject line is not clearly written.
The greeting uses incorrect punctuation.
Subject: Water Issue in Lower Dauphin County
Dear Senator Thomas,
Thank you for your hard work on behalf of the citizens of
our community. The purpose of this email is to bring the
issue of water quality to your attention. A state
commission could investigate this issue, document
problems, and suggest solutions if necessary.
Several citizens in Lower Dauphin County have reported
discolored water and foul smells coming from their
faucets. Personal water quality tests have found elevated
levels of lead in the water. Local officials have refused to
do further testing.
I did some research on the pipes in the area, and I could
not believe that they were so old! Some of them were
installed in 1910! I bet they are leaking lead! Further,
there have been complaints that a local welding company
may be dumping metals into the Choctaw River. The
company denied this to a local journalist.