Nitrate is among the most important elements in water that play a vital role in its quality. The current research was proposed to evaluate the groundwater quality for drinking purposes in region of Doukkala, Morocco. This study aimed to identify the pollution level of nitrate compounds using Nitrate Pollution Index (NPI) method for 97 groundwater samples. The result of the NPI showed the following:  24.8% of the sample sites was very good, 21.6% of the sample sites was good, 12.4% of the sample sites was moderate status, 13.4% of the sample sites was poor status, and 27.8 % of sample locations was  bad  status type of pollution. It shows from this study that it is necessary to implement strategies to protect groundwater resources against nitrate pollution in region of Doukkala. And also educating farmers about the excessive use of fertilizers and their components, and their dire consequences for humans.

Key words: NPI, Groundwater Quality, Region of Doukkala, Morocco.