Air Quality Monitoring System

Air pollution is on the rise in the current circumstances, posing a significant threat to public health. According to the United Nations World Health Organization, 99% of urban residents worldwide are exposed to polluted air, leading to various health issues. The proposed system aims to enhance the quality of indoor air using Arduino UNO integrated with sensors. It employs Optical dust sensor and MQ-135 sensor to monitor dust, pollen, and smoke levels in the atmosphere. The collected data is utilized to analyze and calculate the Air Quality Index (AQI), which is then displayed on the LCD screen. If the AQI value surpasses safe limits (>400ppm), an alert is triggered, accompanied by blinking LEDs to signal the presence of harmful levels of air in the vicnity.