Acid rain is a consequence of pollution in the atmosphere. When any sort of fuel is burned, a number of chemicals are released. The smoke from a fire, factories and the fumes from a car exhaust contain a lot of invisible gases that can be far more toxic to our environment than the smoke grey particles that can be seen. Where in this search, used the data from European Center for Medium - Range Weather Forecasts (ECMWF) was depend on. The search is concerned with studying and measuring acid rain in Heet city for three point in same region (Industrial, residential, agricultural) by using values PH that has been measured by devices (PH (ATC), PH (laboratory), paper PH and TDS (Measures the concentration of basic and acidic salts). Determination the amount of the rain in units (mm/h, inches) and period begin fall the rain for a rainy season (from October to May). Study the behavior of polluting gases in sampling regions (CO, CO2, NO2, NO, SO2, O3) due to it has most influence on the formation of the acid rain and determine the most regions which contain pollutants. After measuring the acid rain samples it was found the highest acidity value was recorded in Kabaisa Cement Factory, which is a polluted industrial area, where the PH value was 4.00, meaning that it is one of the most common areas in which acid rain spreads. While agricultural areas have lowest acidity values where PH between (7.01- 7.05), because they are far from sources of pollutants emission and they contain plants and trees(as is well known plants absorb polluting gases) which makes them areas free of all kinds of polluting gases. Also, residential areas contain acidic PH values where PH between 5.06 - 6.03 at lower rates, and the reason for this is the frequent use of cars and motors and the more widespread Restaurants, bread ovens.