Environmental Forensics in Iraq: From Pollutant Detection to Source Attribution and Criminal Investigation Introduction Environmental forensics is an interdisciplinary field that combines environmental science, analytical chemistry, and forensic science to detect environmental pollutants, identify their sources, and provide scientific evidence for criminal and legal investigations. This field is particularly important in Iraq due to environmental challenges associated with oil pollution, industrial waste, wastewater discharge, and the contamination of soil and water by chemicals and heavy metals. Pollutant Detection and Source Attribution Environmental forensic investigations begin with collecting samples from water, soil, sediments, and potential pollution sites, followed by laboratory analysis using advanced analytical techniques. Gas chromatography–mass spectrometry (GC-MS) is widely used to identify organic compounds and petroleum-related pollutants, while inductively coupled plasma mass spectrometry (ICP-MS) is used to measure the concentrations of many elements and heavy metals. These techniques not only detect pollutants but also help characterize their chemical fingerprints and compare them with reference samples from suspected sources. For example, the chemical composition of petroleum contamination in water can be compared with samples of oil or petroleum products from a nearby industrial facility to assess whether they may share a common source. Geographic Information Systems (GIS) and satellite imagery can also help identify contaminated areas, monitor pollutant distribution, and support the interpretation of analytical results. The Role of Environmental Forensics in Iraq Environmental forensics can support investigations into oil spills, illegal industrial waste disposal, river and groundwater contamination, and discharges that may violate environmental regulations. Combining chemical analysis with field observations helps investigators understand the nature of contamination, evaluate its potential sources, and provide evidence to support environmental monitoring and law enforcement. The reliability of environmental forensic evidence depends on proper sample collection, preservation, and transportation, as well as accurate documentation of the chain of custody and the use of validated analytical methods. Results must also be interpreted carefully, because detecting a pollutant or identifying a similar chemical fingerprint is not sufficient by itself to establish criminal responsibility. Additional relevant evidence is required. Challenges and Future Development The application of environmental forensics in Iraq faces several challenges, including the need for specialized laboratories, modern analytical instruments, trained personnel, and reference databases for pollutants and their potential sources. Strengthening cooperation among universities, environmental institutions, forensic laboratories, and judicial authorities could improve the quality of environmental investigations and promote the effective use of scientific evidence. Conclusion Environmental forensics provides an important scientific approach to moving from pollutant detection to identifying potential sources and supporting environmental crime investigations. Developing this field in Iraq could contribute to combating oil and industrial pollution, strengthening legal accountability, and protecting natural resources and human health through accurate and reliable scientific evidence.