How Many Types Of Impurities Are In The Water?

Water can contain many types of impurities, including chemical, biological, and physical contaminants. These impurities can have a variety of adverse effects on water quality, from changing the taste and odor to inducing health risks. It is important to understand what types of impurities may be present in your drinking water so you can take steps to ensure the safety of your family.

Classification Based On Presence/Occurrence Status

Suspended Solids
Suspended Solids

Suspended Solids: These are inorganic and organic particles suspended in the water. They are usually visible to the naked eye and can be removed by settling or filtration. These contaminants can include sand, dirt, plant matter, plastic fragments, and even animal waste.

Dissolved Solids
Dissolved Solids

Dissolved Solids: These are solids that have dissolved in the water, making them invisible to the naked eye. Common materials include calcium, magnesium, sulfates, chlorides, and nitrates.


Microorganisms: These include bacteria, viruses, protozoans, and parasitic worms which can cause water-borne illnesses. Common bacterial contaminants include coliforms, E. coli, fecal coliforms, giardia, and cryptosporidium. Viruses can also be found in drinking water, including hepatitis A and rotavirus.

Dissolved Gases
Dissolved Gases

Dissolved Gases: These gases dissolve in the water from air or from biological processes. Common dissolved gases include oxygen, nitrogen, and carbon dioxide.

Nutrients: High concentrations of naturally occurring minerals such as calcium, magnesium, phosphorous, potassium, and iron can give water a bad taste or odor, stain plumbing fixtures, and create an unhealthy environment. These are essential elements that are needed for plant growth.

Organic Contaminants: Pesticides, herbicides, industrial chemicals, pharmaceuticals, and volatile organic compounds (VOCs) are found in water systems all over the world. Oils like petroleum products and polycyclic aromatic hydrocarbons (PAHs) are commonly found in water from urban areas or industrial sites.

Inorganic Contaminants: High levels of arsenic, lead, copper, aluminum, nitrate, and fluoride can also be present in drinking water. These contaminants can affect a person’s health over time, from issues with kidney and liver function to nervous system damage.


Chemicals: These are dangerous compounds that can be introduced into the water through industrial processes and runoff from agricultural activities. Common chemicals include pesticides, herbicides, nitrates, and heavy metals.


Radionuclides: Radioactive materials such as uranium, thorium, and radium can occur naturally in some water sources, usually from groundwater sources. These particles emit radiation that can be harmful to humans and animals.

Causes Of Water Impurities

Causes Of Water Impurities
Causes Of Water Impurities
  • Pollution
  • Natural Sources
  • Corrosion
  • Leaching
  • Human Activities
  • Human Waste
  • Industrial Waste
  • Agricultural Runoff
  • Urban Waste
  • Mining


Effects Of Water Impurities On Human Health

Effects Of Water Impurities On Human Health
Effects Of Water Impurities On Human Health
  • Ingestion of contaminated water can cause a range of gastrointestinal illnesses, such as diarrhea, vomiting, cholera, dysentery, and typhoid.
  • Contaminated water may also contain heavy metal contaminants, which can lead to liver, kidney, or neurological damage if ingested in large enough quantities over time.
  • Microorganisms found in contaminated water can cause skin and eye infections.
  • Organic compounds, such as pesticides or polycyclic aromatic hydrocarbons (PAHs) can also cause long-term health effects such as cancer or reproductive issues if ingested in high enough doses over time.
  • Exposure to contaminated water may also cause allergic reactions, asthma attacks, or skin rashes in some individuals.
  • Contaminated water may also contain a variety of chemical pollutants and hazardous substances, which can be both acute (causing short-term health issues) and chronic (causing long-term health issues).
  • These contaminants have the potential to accumulate in tissues over time and cause serious harm to human health.

Effects Of Water Impurities On The Environment


Eutrophication: It is an effect of excessive nutrient enrichment in a body of water caused by runoff from agricultural fields and untreated wastewater carrying high levels of nitrogen and phosphorus.

Pollution Of Ground Water
Pollution Of Ground Water

Pollution Of Ground Water: Different types of impurities like radioactive substances, heavy metals, antibiotics, etc can pollute the groundwater.

Destruction Of Aquatic Life: The presence of impurities can cause the destruction of aquatic life. Metals and other pollutants can damage plants, animals, and microorganisms.

Disruption Of The Ecosystem: The presence of impurities in water disrupts the natural ecological balance due to alterations in the quality or amount of oxygen or food that is available for organisms. This affects their growth and reproduction.

Acid Rain
Acid Rain

Acid Rain: The presence of impurities in the atmosphere causes acid rain which damages vegetation, soils, and aquatic life. It can also lead to the acidification of water bodies, which decreases biodiversity and affects human health.

Climate Change
Climate Change

Climate Change: Water pollutants like methane and nitrous oxide contribute to global warming and climate change.

Method Of Testing Water For Impurities

Step 1. Collecting a sample from the source of water to test water for impurities.

Step 2. Once a sample has been collected, it is tested for physical properties such as color, clarity, temperature, and odor.

Step 3. The sample is then analyzed for a variety of chemical parameters, including pH, total alkalinity/acidity, hardness, and dissolved oxygen levels.

Step 4. Depending on the results of this analysis and the type of impurities present in the water, additional tests can be performed to target particular contaminants such as heavy metals, pesticides, and other organic matter.

Step 5. After the sample has been tested for all contaminants, a comparison can be made between the results of the analysis and accepted standards for drinking water quality to determine if any impurities are present in levels that exceed acceptable limits. If so, further steps may need to be taken such as additional testing or treatment to improve the quality of the water.

Step 6. A report summarizes the findings of the analysis and provides any recommendations for further action. This report can be used by local authorities or organizations to help determine appropriate steps for ensuring safe drinking water is available in their area.


  • Boil water before drinking to kill most bacteria and viruses.
  • Treat surface water with filtration, distillation, or chemical treatments like chlorine and iodine to reduce organic contaminants
  • Use sedimentation tanks and filters to catch any physical impurities that may be present in the water
  • Test your well or municipal water supply regularly for chemical impurities such as nitrates, lead, arsenic, and mercury
  • Avoid contact with potential sources of contamination such as agricultural runoff or septic systems
  • Consider installing a home water filter to remove additional contaminants.


Is Distilled Water Completely Pure?

Distilled water is considered to be one of the purest forms of water available.

What Types Of Contaminants Are Eliminated By The Filter?

  • The filter removes suspended particles such as silt, sand, and clay from water.
  • It also reduces concentrations of organic compounds like bacteria, viruses, algae, and fungi.
  • Heavy metals like lead, mercury, and arsenic can be removed as well.
  • The filter eliminates volatile organic compounds (VOCs), such as benzene and toluene.
  • It helps reduce the levels of chlorinated compounds in water.

Why Does Water Have The Capacity To Dissolve More Impurities?

Water molecules have a special property called polarity. Water molecules are slightly negatively charged on one side and slightly positively charged on the other, creating an overall neutral charge. This polarity gives water its ability to attract and dissolve particles of different charges such as salt, sugars, acids, and even some gases.


It is important to ensure that drinking water meets safety standards in order to protect public health. Properly treated water supplies can help reduce health risks associated with contaminated sources and improve the overall quality of humans and aquatic life.

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