The Hjaraur colony was a Human colony.
History and specifics[]
Sometime between the years 2370 and 2372, the Jem'Hadar used drevlocet against the Hjaraur colony inhabitants, resulting in the deaths of several hundred individuals. After the incident, drevlocet was outlawed in the Alpha Quadrant in several signed military conventions. (DS9 - Day of Honor novel: Armageddon Sky)