In this episode, Scarecrow's hallucinogen is identified as being at a "high concentration" in Gotham's water supply, specifically 0.09 parts per million.
When the severity of this issue is doubted, it's stated that "it's bad. If it were salt, it'd taste like you were drowning in the ocean."
When the severity of this issue is doubted, it's stated that "it's bad. If it were salt, it'd taste like you were drowning in the ocean."
3 mins in one of the police officers says Gotham has a population of 6 million people. When Donna Troy gets into Gotham and passes the border a sign can be seen saying that Gotham has a population of 9,942,436.