Abstract: The Cymbopogon proximus (CP) (Cymbopogon schoenanthus) is commonly used in Sudan to purify and give a favorable aromatic flavor to drinking water. In this study, we examined experimentally the chemical effect resulting from the addition of CP on drinking water F-, NO3¯ and TDS levels. Screening and confirmatory laboratory tests were conducted to investigate the changes of the concentration levels of F¯, NO3¯ and TDS. For screening tests, we used two types of water, (1) drinking groundwater that naturally contaminated with nitrate, (2) Deionized water that artificially (experimentally) contaminated by nitrate. For confirmatory tests, we used only artificially nitrated deionized water. The results obtained indicated that the addition of 3.3 g CP L-1 water entirely removed NO3¯ contamination, as a promising result and at the same time increased both F- and TDS levels by different magnitudes depending on CP weight added and immersion time after the first 24 h passed. Increase of fluoride content in drinking water increases the risk of dental fluorosis prevalence and the other related diseases.