First is important to find the specific type of the contamination (organic, inorganic). Eliminating the solids, the diluted contaminants can be removed throug many ways, as physico-chemical treatments. The simple addition of activated carbon resolve many kinds of contaminants.

There are many ways stated

Thank you Dr.Leonardo for your interesting

Thanks Drink Arkan Radi Ali

@ Anaam Jawad Alabbasy

Please have a look at this useful RG link.

Article Drinking water contamination and treatment techniques

Thanks!

Thank you very much Dr. Arvind Singh

Thanks @ Dr. Joshua..

please check the link

https://solarimpulse.com/water-pollution-solutions

Check it out!

https://solarimpulse.com/water-pollution-solutions

https://www.sciencenewsforstudents.org/article/new-ways-clean-polluted-sources-drinking-water

Thanks Dr. @ Mahan Muzamil for your interesting

Thanks Dr. @ Nirmala S.V.S.G for your answer and interesting..

There is a wide range of methods, depending on whether it is for urban, rural or totally isolated systems. What do you look for?

Dear Dr. Stefan ziemendorff I look for it generally..

Thanks for your interesting..

A short summary of methods according to the problem, but perhaps useful for the preidentification of the most fitted method for different circunstances you can find here in the form of a matrix: http://extensionpublications.unl.edu/assets/pdf/ec703.pdf

A web page with information that is going much deeper in the matter, including manuals and guides is this one: https://www.epa.ie/pubs/advice/drinkingwater/

I hope this link is useful:

https://www.cdc.gov/healthywater/drinking/travel/backcountry_water_treatment.html

Thank you Dr. Zuhair...

Thank you very much Dr.stefan ziemendorff for your interesting..

Dear Anaam,

Contamination in water mainly in three ways, physical, chemical and microbiological.

There are different type of techniques to remove or degrade above mentioned chemical compounds or microorganisms.

Treatment of drinking water mainly in two ways, treatment plants and domestic filters.

Mainly,

Activated carbon widely and common technique used for water treatment processes and most of countries use granular activated carbon for water treatment plants. Its use to treat pesticides, algal and other toxins, heavy metals and some odour forming compounds in water.

Reverse Osmosis is another method to treat drinking water and its very common method in domestic and small scale water treatment plants.

Further, distillation water treatment system uses temperature change to evaporate and recondense clean water.

UV sterilization techniques to remove pathogenic microbes in water.

There are some bioremediation techniques also available in the world to remove some toxic organic compounds in drinking water sources.

Thank you

Yohan

Dear Dr. Yohan,

Thank you very much for your interesting

with best regard..