Pesticides are toxic chemicals that are widely used to control weeds, insects and other unwanted plants or animals. Altazine and simazine are two of the most commonly used pesticides in the US and both have been found in surface and ground water supplies around the world at toxic levels.Pesticide ingestion and inhalation can damage internal organs, cause cancer, and eventually death. The World Health Organization estimates that one-half of the ground and well water in the U.S. is contaminated with pesticides, resulting in 20,000 deaths per year. Our instant do-it-yourself test monitors water for hazardous levels of pesticides. Testing for pesticides should be done annually. PRO-LAB"s Pesticides in Water Test Kit utilizes patented laboratory grade test strips for accuracy and reliability.