The sewage system is an important component of urban infrastructure. Most of the cities adopted efficient sewage systems to maintain the cleanliness of the cities. If the sewage maintenance is not proper, infectious disease may spread. Current sewage monitoring system is not efficient, as it is difficult to find out the poisonous gas level of sewage water. In the existing system, water level and temperature sensors are used to detect the overflow and the inside temperature of the sewage plant.

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... n "IoT BASED SEWAGE GAS MONITORING SYSTEM WITH OVERFLOW DETECTION" is proposed to overcome the above mentioned limitations of existing systems. Internet of Things (IoT) is a network of physical objects that use sensors to capture data and exchange information over the internet which can be adopted to detect and monitor the exaction location of sewage system and the amount of poisonous gases present in the sewage plant.One of the advantage of this project is to prevent of sewage water get mixed with drinking water ,so that the environmental health issues can be solved. The advanced MQ5 sensor is used instead of MQ4 sensor as it detects only methane gas.MQ5 sensor helps to detect the poisonous and flammable gases such as carbon monoxide, methane & LPG. Electrochemical oxygen sensor is provided to detect oxygen level. Then the final measurement will be sent through the WiFi module to the database . The GSM and GPS module is used to send the emergency message and current location to a specific smartphone . In future the project can be upgraded with the aid of modern technology like artificial intelligence.