Ever since late last year, people in various parts of Delaware County, Pennsylvania, have been reporting a foul, sulfur-like smell that comes and goes, seemingly at random. So far no one has been able to pinpoint its source or its nature.
It all started in October of 2019, when a strong odor was reported nearby Aston, Pennsylvania. In November, people in Ridley Township alerted authorities about that same smell on Veterans Day. Then in December several 911 calls were made from Brookhaven about a strong smell in the air that some likened to that of petroleum or sulfur. Several townships reported the mysterious odor in January as well, and earlier this week it made its presence felt in Glenolden as well. Experts are still struggling to find out what’s causing the smell, but they are having a tough time figuring out how it can travel around the 200-square-mile Delaware County, and how it disappears as suddenly as it arrives.