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Understanding Cloudy Tap Water: Insights from Iowa American Water

As winter approaches, many customers of Iowa American Water raise a frequent question: "Why does my tap water sometimes look cloudy or milky?" This common inquiry often leads to concerns about water quality. However, the water quality professionals at Iowa American Water want to reassure residents that the cloudy appearance is typically caused by tiny air bubbles and is not a health hazard.

Tony Loete, the Vice President of Operations at Iowa American Water, explains that the appearance of cloudy water, which resembles the fizz of a carbonated drink when the cap is removed, is caused by dissolved air (specifically oxygen) released from the water when it is dispensed from the tap. He emphasizes that this phenomenon is completely safe and does not violate any health-related guidelines established by either the Iowa Department of Natural Resources (DNR) or the U.S. Environmental Protection Agency (EPA).

The instances of cloudiness are often more noticeable during the colder months. Here’s why: colder water is capable of absorbing more air than warmer water. During winter, the Mississippi River, which serves as the primary water source for Iowa American Water in its Quad Cities District, can reach temperatures as low as 32.5 degrees Fahrenheit. This cold water maintains its saturation with dissolved oxygen throughout the treatment process and while traveling through the underground distribution system, remaining under pressure.

As the water makes its way to a customer's home, it often warms up due to the indoor environment, especially during periods of non-use. Warmer water has a reduced capacity to hold air, and though the water remains pressurized within the plumbing system, the excess dissolved air can only escape once the faucet is turned on. This release causes the visible cloudiness.

Customers may observe this phenomenon firsthand by holding a glass of seemingly cloudy water up to a light source. Instead of being a cause for alarm, they can watch the water clear from the bottom upwards as the small air bubbles rise and escape to the surface. This process usually takes just a few minutes. On the other hand, if the water remains cloudy after several minutes, it may warrant a call to Iowa American Water for further investigation.

For those who still have questions or concerns about their water quality, Iowa American Water encourages them to contact their water quality experts or to take advantage of the resources available on the company's website. This includes access to the latest water quality reports and educational videos explaining the cloudy water phenomenon.

Iowa American Water, a subsidiary of American Water, stands as the largest regulated water utility in Iowa, ensuring that approximately 227,000 residents have access to safe, clean, and reliable water services. With a commitment to exceeding industry standards, Iowa American Water strives to keep the taps flowing healthily and transparently for all its customers. For additional information, visit iowaamwater.com or explore their social media platforms for ongoing updates and resources.

In conclusion, the issues surrounding cloudy tap water are easily explained through the principles of dissolved gases. The winter season brings a peak in inquiries, but residents can take comfort knowing their water is regularly tested and monitored, consistently meeting rigorous safety guidelines. Residents are encouraged to remain informed and proactive about their water quality concerns, ensuring peace of mind with every glass.