According to an August 2009 New York Times article, commercial herbicides such as atrazine are one of the most common pollutants in our drinking water. If you are concerned about spraying commercial weed killer on your lawn every time a dandelion pops up, consider a homemade weed killer. Make an eco-safe weed killer in your kitchen using common items found in your pantry.
Pour 1 gallon of white vinegar into a 2-gallon stock pot. Bring to a boil on a stove.
Pour 1 cup of salt into the boiling vinegar. Reduce to simmer and stir until the salt is dissolved.
Add 2 Tbsp. dish washing detergent to the mixture. Turn off the stove and allow the mixture to cool.
Pour the mixture into a spray bottle.
Arrange a plastic painter's drop cloth around the weed so that over-spray from the herbicide will not kill surrounding vegetation.
Spray the weed, coating the leaves and stem with the herbicide.
Allow the leaves and stem to die, and pull the weed out of the ground. Leaves and stem will turn brown and brittle when they die.