**Tucson's Tea: Desert Air Hiding Summer Zinc Harm?**
By Franklin Everett ShawThe desert heat can be brutal, and a tall glass of iced tea is a Tucson staple for beating it. But what if your refreshing brew was secretly leaching heavy metals into your system? It’s a scary thought, but the combination of our unique desert water, brewing methods, and even the containers we use could be creating a hidden health risk. Let’s dive into how to make sure your Tucson Tea is safe and delicious.
The problem lies in the potential for zinc contamination. Galvanized metal, often used in older water pipes and sometimes in large brewing containers, is coated with zinc to prevent rust. Acidic water, especially when heated, can leach zinc from this coating.
Tucson’s water supply, while generally safe, can have varying pH levels depending on the source and treatment processes. This variability, combined with the high temperatures used for brewing tea and the extended contact time during steeping and cooling, creates a perfect storm for zinc leaching.
Here’s a step-by-step guide to assessing your risk and ensuring your Tucson Tea is safe:
Identify Your Brewing Container: Is it galvanized metal? Look for a dull, gray finish. Avoid using galvanized containers for brewing or storing tea, especially if the container is old or shows signs of wear.
Check Your Water Pipes: If you live in an older home (pre-1960s in Tucson is a good rule of thumb), your plumbing might contain galvanized pipes. Run your cold water for a few minutes before filling your kettle to flush out any potential zinc buildup.
The Taste Test: Does your tea have a metallic taste? This is a key indicator of zinc contamination. If you notice a metallic taste, discard the tea immediately and investigate the source.
Water Quality Testing: For peace of mind, consider getting your water tested for zinc. The Pima County Health Department (specifically their Environmental Health Division) can provide information on certified labs in the Tucson area that offer water testing services. Look for labs that are certified by the Arizona Department of Health Services. Expect to pay around $30-$50 for a zinc test.
Embrace Alternative Materials: Switch to brewing and storing your tea in glass, stainless steel (food grade 304 or 316), or ceramic containers. These materials are non-reactive and won’t leach harmful substances into your tea.
Shorten Steeping Times: While a long steep can extract more flavor, it also increases the risk of leaching. Experiment with shorter steeping times to minimize potential contamination.
Consider Cold Brewing: Cold brewing tea reduces the need for hot water, significantly decreasing the risk of zinc leaching. Simply combine tea leaves and cold water in a pitcher and let it steep in the refrigerator for 8-12 hours.
Filter Your Water: Using a water filter certified to remove heavy metals can further reduce the risk of zinc contamination. Look for filters that meet NSF/ANSI Standard 53 for heavy metal reduction.
The health effects of excess zinc consumption are not to be taken lightly. While zinc is an essential nutrient, excessive intake can lead to:
- Metallic Taste: A persistent metallic taste in your mouth.
- Nausea and Vomiting: Zinc can irritate the stomach lining.
- Abdominal Cramps: Discomfort in the stomach area.
- Copper Deficiency: High zinc levels can interfere with copper absorption, leading to copper deficiency over time. This is especially concerning for individuals with pre-existing copper deficiencies or those who consume large quantities of zinc-rich foods or supplements.
A common mistake is assuming that because Tucson’s municipal water supply meets EPA standards, it’s completely free of contaminants. While the water is safe, trace amounts of zinc can still be present, and the risk increases when it interacts with galvanized materials.
Another pitfall is relying solely on taste to detect contamination. While a strong metallic taste is a clear warning sign, lower levels of zinc may not be noticeable but can still contribute to long-term health problems.
Here’s a real-world scenario: Maria, a long-time Tucson resident, had been brewing her famous iced tea in a large, galvanized metal stockpot passed down from her grandmother. She noticed a slight metallic taste but dismissed it as part of the tea’s unique flavor. After experiencing persistent nausea and abdominal cramps, she consulted her doctor, who suggested testing her water and tea for heavy metals. The results revealed elevated zinc levels in her tea, which were traced back to the galvanized pot. Maria switched to a stainless steel pot and her symptoms resolved within weeks.
To further illustrate the point, let’s consider the specific case of water hardness in Tucson. The city’s water supply comes from a combination of groundwater and Colorado River water. Groundwater tends to be harder, meaning it contains higher levels of minerals like calcium and magnesium. While these minerals are generally harmless, they can affect the pH of the water, potentially increasing its corrosivity and thus the likelihood of zinc leaching.
Therefore, even if your water source is considered safe, the specific mineral composition can influence the risk of zinc contamination when using galvanized containers.
Don’t let fear ruin your enjoyment of Tucson Tea. By understanding the potential risks and taking proactive steps to ensure your brewing practices are safe, you can continue to enjoy this refreshing beverage without compromising your health. Remember to inspect your brewing containers, test your water if you’re concerned, and embrace alternative materials. Stay cool, stay hydrated, and stay safe, Tucson!