The cost of bottled water compared to tap water is approximately 1,000 times higher than the price in comparison; about $1 per 20-ounce bottle compared to municipal tap water, which is about 1 cent per gallon (“Bottled vs. Tap,” n.d.). The EPA requires water treatment plants to provide all residents with a detailed result of any test, including contamination levels, if applicable. The Food and Drug Administration regulates bottled water because water is defined as "food" under federal regulations. Bottled water companies have no guidelines stating that they must do the same or adhere to such guidelines. Public water systems must also test for contaminants four times more often than bottled water; bottled water companies are only required to test once a week. Even with such lax standards, many bottled water companies do not always comply with standardized standards.