The Hidden Risks of Brewing Tea in the Sun

Iced tea is a beloved beverage, as evidenced by the numerous iced tea recipes on this site. From classic sweet tea to variations like peach iced tea, Boston iced tea (with cranberry juice), raspberry iced tea, rhubarb iced tea, and even Instant Pot iced tea, the possibilities are endless.

While iced tea is a year-round favorite, it’s especially refreshing during the summer, offering a cool break from the heat with every sip. One popular method for making iced tea in the warmer months is the sun tea technique, where the sun does the work of steeping the tea leaves.

What is Sun Tea?

Sun tea is made by brewing tea in the sun. Simply fill a clean jar with water and tea bags, then place it in the sunlight to steep. Once the tea has reached the strength you like, it’s ready to serve over ice. This method is simple, eco-friendly, and an enjoyable way to get kids involved in making iced tea.

This method can also lead to foodborne illnesses.

The Dangers of Sun Tea

Tea leaves can be a breeding ground for bacteria. In 1996, the CDC issued guidelines for safely preparing and storing iced tea, warning that bacteria can be introduced during the growing, harvesting, transportation, or steeping processes, and even while storing the brewed tea.

Bacteria thrive in warm environments. They flourish in temperatures ranging from 40°F to 140°F, known as the danger zone. Sun tea typically doesn’t exceed 130°F, which gives bacteria ample opportunity to multiply as the tea steeps for hours in the sun. The CDC’s guidelines recommend avoiding sun tea brewing altogether.

Avoiding the sun tea method is simple, but what if you still want to give it a try? Perhaps your kids are eager to make it, or it’s a cherished family tradition that brings joy when that sun tea jar sits on your patio table.

You can still place that jar on the patio, as long as you follow a few simple safety steps.

Sun Tea Safety Guidelines

There are two important safety steps to follow when making sun tea, and you're probably already practicing one of them.

1. Begin with a thoroughly cleaned and sanitized jar. While this may already be part of your routine, ensure the jar is washed thoroughly in hot water—or in the dishwasher if possible—before you add the water and tea bags.
2. Sanitize the tea bags. Pour boiling water over the tea bags and let them sit for about five minutes to kill any potential bacteria. Once this is done, place the tea bags and steeped water into your clean jar and fill it with more water. Place the jar in the sun to finish steeping. Once ready, store the iced tea in the fridge for up to eight hours.

Add any extras like sweeteners, fruits, or herbs only after the tea has finished steeping in the jar.

By following these easy steps, you can safely enjoy your sun tea all summer long without any worries.