Real-Time Water Quality Monitoring System using the Arduino Uno and a Nextion Touchscreen

Water Quality Monitoring Systems (WQMS) are essential for safeguarding public health and ensuring environmental sustainability by maintaining the safety and usability of water resources. Effective monitoring requires timely data collection to detect contamination and environmental risks. This study developed an Arduino-based WQMS that integrates multiple sensors to measure key parameters, including the potential of Hydrogen (pH), Total Dissolved Solids (TDS), turbidity, and environmental temperature, using a multi-sensor fusion approach for comprehensive real-time monitoring. The system features a Nextion touchscreen interface that not only displays real-time data but also provides interactive user feedback. A dynamic visual alert mechanism changes the background to red when sensor readings exceed predefined safety thresholds, immediately notifying users of potential risks. To evaluate the performance of the WQMS, experiments were conducted using three distinct media (Tap water, milk, and saltwater) under various conditions (e.g., different temperatures, turbidity levels, and dissolved solid concentrations). The results demonstrated the reliability of the WQMS in detecting variations in water quality parameters and providing real-time, user-friendly feedback through the touchscreen interface. The system successfully enhanced data visualization, accessibility, and monitoring simplicity, making it an affordable and adaptable solution for household, agricultural, and industrial applications.