It is an important task for environmental monitoring initiatives to detect pharmaceuticals in water, and this becomes even more complicated when the priority is to reveal low concentrations of these pollutants; that’s why it is necessary to invent new methods like the ones with the use of nanotechnology. One alternative approach has been the development of nanobiosensors, which are highly sensitive and highly specific towards the detection of drugs in water bodies. This abstract presents a summary of how nanobiosensors have improved drug detection as part of environmental monitoring advancements. Utilizing the principles of nanotechnology and biosensing, nano-biosensors can identify low quantities of drugs with outstanding precision. In the area of detecting drugs in water samples, two main categories that are commonly used are electrochemical and optical biosensors, each having their own set of advantages. By means of electrochemical biosensors, electrical currents fluctuating due to drug-receptor combinations are tracked, whereas light-based detection mechanisms serve as primary methods used by optical biosensors in order to detect sensitive analytes. Incorporating nanobiosensors into an already established environmental monitoring system amplifies our potential to detect and counteract the menace of pharmaceutical pollution in aquatic environments. The use of nanobots makes it possible for researchers and practitioners to monitor pollutants in real-time through distributed systems and locate pollution clusters accurately, thus offering these interested parties the possibility to adopt curative or preventive measures focused on the identified risks.