The study on the Effluent Quality Monitoring System for the Cement Industry aimed to design a system for the regular monitoring of key parameters in effluent discharge. The research employed an engineering approach to test effluent samples from a cement manufacturer, adhering to the standards set by the Department of Environment and Natural Resources (DENR). Data were transmitted via a low-power LoRa module, with an approximate range of 1.5 kilometers. To validate the device’s reliability and accuracy, testing was conducted at the cement facility, complemented by laboratory analyses. A paired t-test assessed the statistical significance of the differences between field measurements and laboratory results. For pH, the field average was 7.12 compared to 6.87 in the lab, with standard deviations of 0.49 and 0.46, yielding a t-value of 2.059 and a p-value of 0.095, indicating no significant difference. Turbidity measurements revealed a mean difference of 21.7 NTU between field testing and laboratory readings. Although the standard deviation was higher in the field than in the laboratory, the t-test yielded a t-value of 2.597 and a p-value of 0.048. Recommendations include refining the device, adding more samples to be tested, and incorporating activity logs and climate data to enhance its capability to address environmental challenges.