Call: 888-217-2719. The opioid epidemic has devastated communities across the United States. One of the most dangerous opioids causing thousands of overdoses is fentanyl. As a synthetic opioid, fentanyl is 50-100 times more potent than morphine and dangerously contaminating homes, cars and public spaces. Even small exposures can be harmful, making testing critical. At A-1 Certified Environmental Services, we provide professional fentanyl residue testing to help clients identify contamination and create safer living spaces.