7 Facts On Ph Of Water : Types, Factors And Reasons

What is the pH of Water?

The pH of pure water is 7. However, it may range between 5 and 9. The pH of water changes due to the presence of dissolved impurities inside it.

What is the pH of different types of water?

The pH of different types of water are mentioned below.

Type of WaterpH Value
Pure Water7
Tap WaterAround 7.5
Distilled Water7
Distilled Reverse Osmosis Water5 to 7
Sea WaterAround 8
Common Bottled Water6.5 to 7.5
Alkaline Bottled Water8 to 9
Acid Rain5 to 5.5

Why is pH different for different types of Water?

The pH of water is different for different types of water because of the presence of gases, minerals and organic matter dissolved inside it. For example,

  • Rainwater has a lower pH due to the presence of carbon dioxide and sulphur dioxide in the atmosphere.
  • Groundwater has a higher pH due to the presence of calcium and magnesium minerals inside it.

How can we determine the pH of water?

We can determine the pH of water by using the following methods:

  • pH Meter
  • Chemical Indicator

What is the healthiest pH for drinking water?

The World Health Organization (WHO) and Environmental Protection Agency (EPA) advise that water pH should range between 6.5 and 9.

Why is it necessary to balance the pH of water?

Balancing the pH of water is crucial as it affects the quality and ability to support life. Imbalanced pH water can affect us in the following ways.

  • Health Problems: Drinking water with imbalanced pH can affect us harshly. Acidic water decreases the pH level of our body, causing acidity. In contrast, drinking alkaline water can increase our body’s pH level, causing dry and itchy skin or an upset stomach.
  • Growth and Survival of Aquatic Plants and Animals: Imbalanced pH water can hinder marine life. Water that is too acidic or alkaline alters aquatic plants’ and animals’ growth and survival inside it.
  • Reduced shelf life of Industrial Machines: Imbalanced pH water can affect the shelf life of industrial machines. Low-pH water causes scaling and fanfare in pipes and other machine gears.
  • Day-to-day Life: Imbalanced pH water can affect our daily everyday life. Low pH or acidic water can damage household pipes and plumbing systems. 

How can we balance the pH of Water?

The pH of water can be balanced by following the mentioned given below.

  • Adding Alkaline Substance: A low-pH water can be balanced by adding alkaline salts like baking soda, lime, or limestone.
  • Adding Acidic Substance: A high-pH water can be offset by adding acidic salts like citric acid or vinegar. 
  • Installing Water Filtration System: A water filtration system is a purification machine that balances the pH of water. It functions by removing water impurities.

Factor affecting the pH of Water

There are a plethora of factors that alter the pH of water. A few of them are mentioned below.

  • Dissolved gases, minerals and organic matter: The presence of dissolved gases, minerals and organic matter like iron ore, carbon dioxide or waste can change the pH of water.
  • Acid Rain: Acid rain contains a high amount of carbon dioxide, sulphur dioxide or nitrogen oxide gases which decreases the pH of water.
  • Human Activities: Human activities like mining, agriculture or industries release toxic chemicals into the environment that alter water pH.
  • Water age: The water Age can also change the pH of water. Water in pipes for a long time has lower pH, i.e., more acidic.
  • Climate: Climate also affects the pH of the water to a great extent. For example, Rainforest water has lower pH due to the presence of carbon dioxide.

What are the effects of drinking low-pH Water?

Drinking water of lower pH can affect our bodies. A few effects of drinking low-pH water are mentioned below.

  • Digestive issues: Low-pH water can imbalance the pH of the stomach causing acid reflux.
  • Tooth Decay: Low-pH water can erode tooth enamel, causing sensitivity or tooth decay.
  • Skin irritation: A low-pH water causes dryness and skin irritation.
  • Bone loss: Low-pH water increases body acidity, causing bone loss or osteoporosis.
  • Copper leaching: A low-pH water leaches copper in water, causing copper toxicity.

What are the effects of drinking high-pH Water?

Drinking water of higher pH can affect our bodies. A few effects of consuming high-pH water are mentioned below.

  • pH Imbalance: A high water pH alters the body’s natural pH, causing health problems like dry and itchy skin or an upset stomach.
  • Gastric problems: A high water pH can cause problems like indigestion, acid reflux or stomach ulcers.
  • Mineral depletion: A high-pH water strips off the body’s essential minerals like potassium, magnesium and calcium, causing osteoporosis.
  • Electrolyte imbalances: A high-pH water interferes with bodies electrolyte balance, causing dehydration, cramps or weakness.
  • Kidney Function: A high pH of water affects the functioning of the kidney. 

About the author

I am Leena Raswant, a chemistry postgraduate. I thrive on challenges and continually specified goals. I aim to learn, unlearn, relearn and spread my knowledge in the best possible ways.

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