|This location exists primarily or exclusively within the Pre-Super Genesis Wave continuity.|
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.
- For the version of this location after the Super Genesis Wave, see Chemical Plant Zone (Archie).
Chemical Plant Zone is a location that appears in the Sonic the Hedgehog comic series and its spin-offs published by Archie Comics. It was a facility controlled by Dr. Eggman, that existed on Mobius when it was rewritten by the first Genesis Wave. Its name comes from the sheer volume of chemicals produced here, most-if not all-of which are known to be toxic.
According to Tails, this area had so much chemical fuel it seemed Eggman was "polluting for pollution's sake". It contained many pipes that could be used to travel throughout the plant, yellow crates that defied gravity, and it could be flooded with Mega-Muck.
During the period when Dr. Eggman's Operation: Clean Sweep altered reality and reshaped Mobius, the Chemical Plant Zone was an industrial zone controlled by Dr. Eggman. In their mission to find and bring down Eggman, the Knothole Freedom Fighters traveled through this Zone and split up after, with Sonic and Tails heading to Metropolis Zone and the Freedom Fighters heading to Oil Ocean Zone.
- Note: From this point, the Chemical Plant Zone's history continues from its new existence in the altered timeline.