Toowoomba Regional Council has undertaken extensive flood modelling of the Toowoomba catchments to better prepare for extreme rainfall events such as those experienced in January 2011. The Toowoomba CBD catchment consists of two main creeks, East and West, which merge to form Gowrie Creek just north of the CBD. Both catchments are small and steep creating a potential for flash flooding with minimal warning time. In 2013/2014, state-of-the-art water level gauges were installed at five locations throughout the Toowoomba creek (East, West and Gowrie) catchments with locations based on a combination of flood modelling and public input. A review of the gauge data was undertaken to determine the appropriateness of the gauge location in terms of providing early warnings of potential flooding to Toowoomba CBD and whether the gauge survey data was accurate.