Studying the conductivity of rainwater is important for assessing its purity and understanding the presence of dissolved ions, which can indicate environmental pollution and affect water usability. TDS, or Total Dissolved Solids, measures the total concentration of dissolved substances in water and is usually expressed in ppm or mg/L. Electrical conductivity (EC), measured in microSiemens per centimeter (µS/cm), indicates how well water can conduct electricity due to the presence of ions. Siemens (S) is the SI unit of conductance, where 1 S = 1,000 mS = 1,000,000 µS. TDS and conductivity are closely linked, and in low-mineral water like rainwater, TDS (ppm) is often estimated as half the EC value, meaning EC (µS/cm) ≈ TDS × 2. This relationship helps determine the quality and usability of collected rainwater.
To read the technical details please go through the Zenodo Document.
The TDS value of rainfall recorded since the inception of our monitoring station located at Ramanuj Gupta Degree College, Silchar (24.8333° N, 92.7789° E) can be downloaded from the below button
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Acknowledgements: Dr. Saumyadeep Roy Choudhury, Dr. Subhasish Chakrabarty, and Mr. Mahim Uddin Tapadar are thanked for their generous contributions. Mr. Munna Roy is thanked for his cooperations. Dr. Anjana Bhattacharjee, Principal, RGDC is thanked for her encouragements. At the last but above all, Mr. Rudra Narayan Gupta, President, Ramanuj Gupta Charitable Trust is acknowledged for his kind support.