As a laboratory intern at the Wastewater Laboratory Branch Directorate of ISKI, I had the opportunity to gain hands-on experience in wastewater quality control. I worked with samples from rivers, lakes, and wastewater treatment plants to assess water quality. I assisted in performing a variety of analyses, including COD, BOD, Solids, Oil and Grease, TOC, TKN, and Sulfate, as well as utilizing autoanalyzers for Total Phosphorus, Total Cyanide, Sulfide, Nitrate Nitrogen, Phenol, and Ammonia. This internship provided me with valuable insights into water and wastewater analysis.