According to our records, this business is located at 520 Mission St. in South Pasadena (in Los Angeles County), California 91030, the location GPS coordinates are: 34.115975 (latitude), -118.164172 (longitude). G S I/Water is categorized under Overburden Removal, Nonmetallic Minerals (SIC code 1481). Known organization president is Joseph Birman. Current estimates show that the unit has a sales volume of $716,000 and staff of approximately 8 people. You can contact the company by phone at (626) 441-0039.