  Sensor placement for contaminant detection in water distribution systems
(WDS) has become a topic of great interest aiming to secure a population's
water supply. Several approaches can be found in the literature with
differences ranging from the objective selected to optimize to the methods
implemented to solve the optimization problem. In this work we aim to give an
overview of the current work in sensor placement with focus on contaminant
detection for WDS. We present some of the objectives for which the sensor
placement problem is defined along with common optimization algorithms and
Toolkits available to help with algorithm testing and comparison.
