I have gone through 90% of eval for Lung Tx, due to COPD. I quit smoking 4/2/22 and stopped nicotine gum in October 2022. Two urine cotinine tests were positive!!! Even an OTC test produced positive results for me and my husband - he quit 17 years ago! We live in a rural agricultural area of NY and my research leads me to believe there may be neonicotinoid-based insecticides leaching into groundwater. Just shipped a sample to the lab today. In the meantime, has anyone heard of this? Is there anything else that could lead to positive cotinine???