Plasmonic nanosensors with molecular imprints are reliable tools for selectively interacting with target molecules and occasionally catalyzing reactions. Recent advancements in nanoscale structure control have facilitated the development of a diverse range of chemical sensors for environmental monitoring. The increasing environmental contamination resulting from the activities of living organisms, along with their detrimental effects on ecology, underscores the urgency for rapid and user-friendly methods for on-site environmental evaluation and monitoring. Rapid and accurate assessment of environmental quality is crucial in addressing the growing concerns over pollution, habitat degradation, and human health risks. © 2023 IEEE.