Jawad Abdulkadhim Alaboudi et al./ Elixir Environ. & Forestry 99 (2016) 43109-43112 43109 Introduction People are exposed to many sources of non-ionizing radio frequency (RF) electromagnetic fields (EMF) including radio and TV transmitters, telecommunications links, and satellite communications as well as mobile phones and their supporting transmitters base stations. There is a great concern expressed about possible health effects associated with exposure to such non-ionizing EMF radiations. International guidelines have been issued to protect professional workers and the public from short-term high level EMF exposure (1, 2, 3, 4 and 5). To avoid the excessive exposure in a certain area, environmental geographical maps for EMF exposure level and distribution to be known. During the last years employment of GIS extended from topographical surveys to environmental applications, GIS has been created in order to show some thematic maps, which represent the distribution of EMF pollution (6). The using of GIS for the evaluation of EMF effects from Iraqi 132KV electrical transmission system was introduced in 2011 (7). Samples of 132KV high voltage transmission lines are selected for calculation of magnetic and electric field levels and compared with ICNIRP (International Commission on Non-Ionizing Radiation Protection) standard limits. GIS maps are introduced for visually highlight the unsafe zones in proximity of lines. Materials and Method Fields measurements have been implemented in the Iraqi capital city (Baghdad) which was selected as a sample of the study area. The study area was converted into a virtual mesh by subdividing into smaller square areas, the mesh density varied according to the required accuracy as more dense required when high gradient EMF exposure level is expected. The measurements are implemented in the interception points of the mesh lines to produce a regular distribution of data. EMF field strength measurements are made using a calibrated spectrum analyzer type (SPECTRAN HF-6065) with (hyper LOG) measuring antenna type (AARONIA 7060). Geographical locations in decimal degree are measured using Garmin GPS type (GPS62st), the required statistical analysis for measurements is implemented using IBM SPSS Version 20. The inverse distance weighted (IDW) interpolation spatial tool has been used for EMF exposure level calculation in unknown areas. IDW is the process of estimating an unknown value by using values that are already known.IDW method is widely used in GIS atmosphere analysis applications, the reason behind that is less distortion with high accuracy maps obtained when enough measuring points are available (8). Data analysis The EMF radiation exposure metrics have been considered as: the electric-field strength E (V/m), the power density S (W/m 2 ), furthermore, exposure ratios (ER) and average contributions(AC) and maximum contributions(MC) are defined. The exposure ratio ER of an EMF radiation exposure is defined as the ratio between the maximum measured electric field value for the considered exposure type over the total locations and the corresponding ICNIRP reference level (L E ): (1) With the maximum value over N locations when considering all data, Ei (V/m) is the field strength of an EMF radiation exposure type at location i, respectively, L E the corresponding ICNIRP reference levels for electric-field strength in (V/m), a ratio smaller than 100 % means that ICNIRP reference levels are satisfied. The exposure ratio can also be defined with respect to power densities (ERs). ARTICLE INFO Article history: Received: 19 August 2016; Received in revised form: 2 October 2016; Accepted: 12 October 2016; Keywords GIS, Environmental pollution, Exposure, EMF Radiations and Mapping. Using Geographical Information System for Electromagnetic Fields Environmental Pollution Mapping (Applied Study in Baghdad City) Jawad Abdulkadhim Alaboudi , Mohamad T. Hamza, Alaa M. Hammadi and Adnan H. Afaj Environment and water Directorate, Ministry of Science and Technology. ABSTRACT The development of new technology increases the exposure level to non-ionizing EMF radiations. Recent development of spatial data management in the framework of GIS has created a new trend of environmental mapping. In this work, maps for different EMF sources have been developed for the Baghdad city using Arc Map GIS version 10, the utilization of such spatial analysis maps is very important for future planning and EMF exposure assessment studies. Statistical analysis for measurement data was made using IBM SPSS Version 20. The maximum contribution of EMF exposure was referred to FM radio stations and GSM mobile base station due to high power transmitters and large number of base stations, maximum EMF strength caused by FM radio stations was 10.2 (V/m) and the average exposure level 3.578 (V/m). High-level exposure values unveil the necessity of imposing new recommendations and limits concerning stations site selection and reducing exposure levels in residential areas as low as possible. © 2016 Elixir All rights reserved. Elixir Environ. & Forestry 99 (2016) 43109-43112 Environment and Forestry Available online at www.elixirpublishers.com (Elixir International Journal) Tele: E-mail address: jawadkadhim66@yahoo.com © 2016 Elixir All rights reserved