Balamurugan Thiru

What is pH? You may have heard the word “pH” used to describe drinking water quality, but do you know what it means? The pH scale ranges from 0 to 14: pH measures electrically charged particles in a substance. It indicates how acidic or alkaline (basic) that substance is. Acidic water has a pH lower than 7. The most acidic substances have a pH of 0. Battery acid falls into this category. Alkaline water has a pH of 8 or above. The most alkaline substances, such as lye, have a pH of 14. Pure water has a pH of 7 and is considered “neutral” because it has neither acidic nor basic qualities. What pH is safe for drinking water? The U.S. Environmental Protection Agency (EPA) monitors public drinking water quality across the United States. pH isn’t a quality that falls under EPA regulation because it’s considered an aesthetic water quality. However, the agency recommends that municipal drinking water suppliers keep their water supply at a pH of 6.5 to 8.5. What does a changing or unsafe pH mean? Freshwater pH varies across the world depending on weather patterns, human activity, and natural processes. Water with a very low or high pH can be a sign of chemical or heavy metal pollution. Water that doesn’t fall in the “safe” pH range of 6.5 to 8.5, particularly if it’s alkaline, isn’t necessarily unsafe. However, very alkaline water can have an unpleasant smell or taste, and it can also damage pipes and water-carrying appliances. Acidic water with a pH of less than 6.5 is more likely to be contaminated with pollutants, making it unsafe to drink. It can also corrode (dissolve) metal pipes. Many municipal water suppliers voluntarily test the pH of their water to monitor for pollutants, which may be indicated by a changing pH. When pollutants are present, water companies treat their water to make it safe to drink again. Common water pH levels Type of water pH level Tap water Varies; typically about 7.5 Distilled reverse osmosis water 5 to 7 Common bottled waters 6.5 to 7.5 Bottled waters labeled as alkaline 8 to 9 Ocean water About 8 Acid rain 5 to 5.5 Alkaline water: A new trend Alkaline water has become a popular drinking water choice over the past few years. Some people say that drinking slightly alkaline water — with a pH between 8 and 9 — can improve your health. They say it may make you age more slowly, maintain a healthy pH in your body, and block chronic diseases like cancer. Despite the many health claims made by alkaline water drinkers and sellers, there’s little to any scientific evidence that alkaline water is healthier than other kinds of drinking water. But a few studies are suggesting alkaline water may benefit the health of people with certain medical conditions, such as: acid reflux (2012 study trusted Source) high blood pressure, diabetes, and high cholesterol (2001 study) High alkaline, electrolyzed water may also be helpful after dehydration caused by exercise. More research is needed to support the findings of these small studies fully. Testing pH at home Municipal water suppliers normally do a good job of keeping their water at a normal pH of around 7, so there’s usually no need to do your own home testing. But if you notice that your faucets and pipes have taken on a rusty red, white, or blue color, you might want to take steps on your own. This discoloration — as well as any discoloration of your drinking water — is a sign of corrosion caused by acidic water. Corroded pipes should be inspected by a professional plumber and replaced if necessary. It’s fairly easy and inexpensive to test the pH of your drinking water at home. All you need is a home test kit. These come in many different forms at different price points. Some of the most highly rated pH test products are water quality tester “pens.” Dip the pen into a sample of your drinking water and, a few moments later, receive an accurate pH reading. Two popular models are the 7Pros and Jellas digital water meters. If your waterfalls are within the EPA recommended range of 6.5 to 8.5, there’s no need to take action. The takeaway If your drinking water pH falls outside of the safe range, it’s time to act. Call your local drinking water company to alert them to your test findings. Since pH is often a sign of contamination, the water company may run several tests looking for various contaminants. They may visit your residence to test your water professionally. They should handle the situation if their test also comes back abnormal. In the meantime, if you suspect problems with your drinking water — whether it’s pH, a strange texture, a bad taste, or a bad smell — you can purchase a pitcher like the one made by Brita or install a filter system in your kitchen sink. PUR has a popular filter system. Be sure to keep in communication with your local water provider. Ask for an annual report to stay on top of your drinking water quality. Last medically reviewed on January 16, 2018