The 22-year-old man was charged with the misdemeanor May 11 in a criminal complaint filed in Mower County District Court.
The man's vehicle was ticketed on April 18 while it was parked in front of his residence. He put an envelope containing his payment and dog feces in a drop box at the law enforcement center, the complaint stated.
On April 25, an office employee for the Austin Police Department smelled a rank odor as she gathered envelopes from the box. Opening the envelopes, the woman noticed one leaking a brown fluid, which got onto her hands and her desk, according to the complaint.
The next morning the woman awoke with a headache and vomited repeatedly. She was hospitalized for about two days with an undetermined illness.
The man allegedly admitted putting his dog's feces in the envelope because he was upset at the time, the complaint stated. He told police he immediately regretted doing it because he realized a secretary would probably open it.
The man has been summoned to appear in court June 15.