eng Science and Education Publishing Applied Ecology and Environmental Sciences 2328-3920 2022-06-26 10 6 409 416 10.12691/aees-10-6-11 AEES202210611 article Shahjad Ali alishahzad75@gmail.com 1 Rajesh Kumar Deolia 2 Shailendra Singh 3 Hamid Ali 4 Mohammad Akhtar 5 Raisul Islam 6 7 Department of Applied Sciences, Anand Engineering College, Agra, India Mathemitics Department, School of Sciences, ITM University, Gwalior, India Department of Mechanical Engineering, Anand Engineering College, Agra, India Department of Petroleum Studies, Z.H. College of Engineering & Technology, Aligarh Muslim University, Aligarh, India Louis Berger International A WSP Company, Gurugram, India Department of Civil Engineering, GLA University, Mathura, India The object of the present research is to inspect the underground water quality for urban areas of Agra, India by water quality index. Sampling was taken from 70 various spatially dispersed locations. Piper and Schoeller diagrams were designed to discover the numerous ions and its constituent present in the present research area. Twelve Physicochemical parameters such as F? (Fluorite), pH (Hydrogen ion concentration), TDS (Total Dissolved Solids), Alkalinity, Cl? (chloride), Ca2+ (Calcium), Mg2+ (Magnesium), ions of Na+ (sodium), K+ (Potassium), NO3- (Nitrate), SO42- (Sulfate) and TH (Hardness) calculated at 70 groundwater samples from 14 locations of Agra for over a month. We found that more than 64% of samples collected were in lies unfit water category, 21.42% of samples lie in the poor category, 14.28% extremely poor category of water and no water was found in the good and excellent category. The study revealed that more than 99% of samples were not fit for drinking water and other purposes. The percentage distribution was delineated through the pie chart. The water quality index (WQI) ranges from 50.01 to 130.62. Thus, there is a need for some treatment before usage, and required to protect that area from health hazards. http://pubs.sciepub.com/aees/10/6/11/aees-10-6-11.pdf water quality index piper diagram Schoeller diagrams physico-chemical characterization Agra city groundwater