Water resources are of great importance in the world's agriculture, especially regarding the scarcity of these resources. That calls for attention appropriate for analysis, study, and research in all issues and aspects that would contribute to the development and maintenance of those resources and achieve the maximum possible levels of quality and efficiency of use. The study was conducted during the fall season of 2020 to study groundwater quality (well water) in the city of Al-Qaim of Anbar Province to explain its suitability for agricultural exploitation in the region. The study included seven sites in Al-Qaim (Rtemi, Medicis, Eastern Akash, Okesha, Sawab, Albu-Hayat, and Al-Karah) to assess the validity of irrigation. The pH, Electrical conductivity (EC), positive ions (K+, Na+, Mg2+, Ca2+), and negative ions (HCO3, Cl-2, SO4) and CO3 were measured. The results showed that the studied well water is acceptable for irrigation purposes in terms of pH value, as for the electrical connection, it was six wells within the class (C2), which is adequate for irrigation for medium-salty crops, except for one well, which is a fine well within class C3 suitable for irrigation of high salinity crops. The total hardness values were low and did not pose any risk; as for the positive and negative ions, they were within the permissible limits within the specified classifications. By measuring the positive ions, the Sodium Adsorption Ratio (SAR) value was calculated and determined to be within the class S1, which means that the groundwater in the region is suitable for irrigation.

Artificial groundwater recharged with rainwater is the most popular technique for groundwater quality and quantity. Nevertheless, it is still a challenge for researchers to provide precise quantification of groundwater quality and quantity enhancement by recharging with rainwater due to variations in groundwater quality factors such as topography, hydrogeological phenomenon, availability of rainwater, land use pattern, etc. An attempt is being made here to extract the improvement of groundwater quality by adding the collected rainwater of known quality parameters into the developed aquifer strata in the laboratory with regulated laboratory setup and under similar conditions to the aquifer area of analysis. The results showed a decrease in the pH at all sites, especially A1, where it decreased from 8.2 to 7.3. As for Total Dissolved Solids (TDS), the results showed a decrease in all sites, especially A1, where it decreased from (2860 to 2390) mg\lit. Also, for CL-, the greatest decline was in A1, falling from (2.400 to 205) mg \lit. As for the EC values, the site A2 was the lowest, dropping from )5.6 to 4.29 mS/cm). Regarding hardness, the best result was in site B1, where the decrease was from (286 to 220) mg\lit and finally nitrate experienced the greatest decrease in site B2, where it was from (122 to 78) mg\lit.