Radon measurement in the Himalayan region is crucial due to the unique geological composition that may lead to elevated radon levels in water sources, posing potential health risks to the local population. This study focuses on radon concentration in drinking water collected from 13 spring water samples and 13 groundwater samples (via hand pumps) across various locations in the Devprayag region. Radon levels were assessed using the SMART RnDuo continuous radon monitor. The concentration in spring water varied between 0.7 Bq/L and 64.4 Bq/L, while groundwater levels ranged from 0.6 Bq/L to 79.5 Bq/L. Although the radon levels in the samples fell within the safe limits set by the World Health Organization (WHO), the estimated annual effective dose from radon ingestion and inhalation surpassed the WHO's safety threshold of 100 μSv/year in several areas. These results highlight the necessity of ongoing radon monitoring in the region to reduce long-term health risks and guide safety standards for drinking water.