Niranjan Karagi’s Nirnal world’s cheapest portable water filter


Sometimes, the inspiration for the most brilliant of inventions can come from the most humbling of places. Such is the case for NirNal founder Niranjan Karagi while he was playing in a schoolyard nearby his home has invented and patented the world’s cheapest water filter which costs Rs.30 and can be used for 100 times and fits any water bottle and this removes 99% of bacteria and other disease-causing water contaminants.

AAB is proud that we were the first ones to cover his project in December 2016, An Engineer Filters the Way to Success.

Niranjan now has many accolades to his name including Best Entrepreneur Award by Deshpande Foundation – Feb 2017, Best Entrepreneur Award by Visvesvaraya Technological University (VTU) – Jan 2017, Yuva Shilpi Award by Akhil Bharatiya Vidyarthi Parishad (ABVP).


It is a compatible, portable, reusable, healthy and an eco-friendly water purifier. A product that ensures ‘Safe Drinking water ’ at an affordable price. This acts as a filter when the water oozes out of Nirnal fixed to the bottles. It is easy to use, imparts taste and also adds some essential minerals to the water. It uses activated charcoal, Filter cloth.

Niranjan Karagi’s Nirnal world's cheapest portable water filterNiranjan did his schooling from St. Mary’s school Belagavi and PUC from Govindram Seksaria Science College, Belagavi. Later completed Mechanical engineering from Angadi Institute of Technology and Management in Belagavi.

During his free time, he noticed some small children using the playground and filling up their plastic water bottles from a potentially unsafe tap. Bearing witness to the scene, Niranjan reflected sadly on this reality and felt that all children should have clean water despite their income or area of residence. It was certainly not a surprise for the young leader to think of such social issues, given his involvement in the LEAD program at AITM College Belagavi. But it was this particular case that leads him to create something that would make a significant social impact for many people.

Water filtration became the main theme for Niranjan as he began to brainstorm ideas on providing a clean, low-cost source of water. Seeing as his research revealed the relatively high prices charged by competitors for filters, the future entrepreneur settled on creating a water filter that was both very affordable and portable for bottles. His first prototype used materials that were easily accessible around the house but after some assistance from LEAD, a second prototype was created that took Niranjan 4 painstaking months to perfect. The result was a small filter that could be fitted into any standard plastic bottle with an incredibly low cost of 20 rupees.

Niranjan Karagi’s Nirnal world's cheapest portable water filter
At that point, all the hard work put into the prototype paid off. Approval was given by the Food Divisional Officer stating that the filter could purify up to 100 liters of water. Furthermore, Niranjan turned to social entrepreneurship as a means of spreading his technology by agreeing to receive tier-ii incubation support in Belagavi by the Sandbox-IMER center. Sandbox Startups was instrumental to the founding of the NirNal enterprise, officially registered with the Ministry of Micro Small and Medium Enterprises in Belagavi. Furthermore, the incubation center gave him a platform to pursue his ideas for his product while gaining business knowledge about scalability and validity for the purposes of society. Complete with networking events, partnership opportunities, mentoring, and investor meetings, Sandbox Startups was an essential springboard to Niranjan’s growth as a social entrepreneur.

The social impact of his product has been significant. With the distribution of his product to various villages, schools, and even India’s military, it is evident that NirNal has been widely acclaimed for its ingenious and inexpensive technology. But on a personal level, Niranjan is happy with the fact that children could use his filter, knowing that they would always have a reliable source of water as they grow up. Niranjan’s initial wish to provide clean water to everyone has become more and more of a reality through the means of his portable water filter. This reality was made possible for thousands of people as 12,000 units of his filter have already been sold.

Indeed, it is exciting to see how NirNal will scale with its water filters. Niranjan himself has stated that he would like to improve the unit even further while maintaining a low price, all while maintaining his goal of providing clean water to all rural people. If he were to truly succeed in his endeavors, there would be much cause for celebration for this ingenious invention.

Order request can be sent from here  

Niranjan can be contacted +91-779-533-9714 or [email protected] 




  1. Hi sir..
    I’m B Tirupati from dharwad,
    ಉತ್ತರ ಕರ್ನಾಟಕ ದಲ್ಲಿ ಪ್ರವಾಹ ದಿಂದಾಗಿ ಕೃಷ್ಣ ನದಿ ಹಾಗು ಮಲಪ್ರಭಾ ನದಿ ನೀರು ಅಧಿಕ ಪ್ರಮಾಣದಲ್ಲಿ ಬಂದಿರುತ್ತದೆ.. ಅದರಲ್ಲಿ ಅತಿ ಹೆಚ್ಚಿನ ಕಲುಷಿತ ನೀರು ಇರುತ್ತದೆ ಅದರಿಂದ ಇಲ್ಲಿ ನಮ್ಮ ಅಮೀನಭಾವಿ ಬೋರ್ಡ್ ನಲ್ಲಿ ಸರಿಯಾಗಿ ಫಿಲ್ಟರ್ ಆಗದೆ ನೀರು ಹಾಗೆ ಎಲ್ಲ ಮನೆಗಳಿಗೂ ಹಾಗೂ ನಗರ ಪ್ರದೇಶ ಗಳಿಗು ಬಿಡಲಾಗುತ್ತಿದೆ..
    ಸಾಮಾನ್ಯ ಜನರು ಸಾವಿರಾರು ರೂಪಾಯಿ ಕೊಟ್ಟು ವಾಟರ್ ಫಿಲ್ಟ ರ ಕೊಂಡುಕೊಳ್ಳಲು ಆಗದಿರುವುದು ಅದರಿಂದ ತಮ್ಮ ಪ್ರೊಡಕ್ಟ್ ನಮಗೆ ಸಪ್ಲೈ ಮಾಡಿದರೆ ತುಂಬಾ ಉಪುಕ್ತವಾಗಿರುತ್ತದೆ..
    ಇದನ್ನ ಎಲ್ಲಾ ಕಡೆ ಹುಡುಕಿದರೂ ಯಲ್ಲಿಯು ಸಿಗುತ್ತಿಲ್ಲ (ಅಮೆಜಾನ್, ಫ್ಲಿಫ್ಕರ್ಟ್ etc..)
    ದಯವಿಟ್ಟು ಕೊಡಿ..
    My number. :+91 8095837900
    Email ID : [email protected]

  2. Good morning sir,
    Great, very nice product.
    I want to buy it, as well l can sell it in wholesale..
    Where to contact for business deal, please let me know.
    You can contact me on
    Hosur tamilnadu

  3. Great work Niranjan. How do we get your product karimnagar in Telangana state pin-505001

  4. Namaste Brother Niranjan , My hearty Congratulations to Your Excellent invention and its great Social service to all downtrodden people of Our Country. I am environmentalist and Social worker since 1994. Thus I would like to take part in AP if possible please contact my number 7989919018.

  5. I am intrested for business in Gujrat with your product
    Pls sand me your total product rang idea
    My mobile no
    Bankimchandra Tailor

  6. Really great ?
    I want to buy this product can you please send me the products, my contact no 9373202007
    my name k shanmukha rao

  7. Really great ?
    I want to buy this product can you please send me the products, my contact no 9922630652. Amit Patil. Sangli.

  8. I would like to buy NIRNAL Water Filter please tell me where I will get it in nagpur. Immediately I need the same.

  9. Really innovative. How can we buy it.? It will be a boon for our nation. If it is available for sale in Maharashtra please let me know. If not please let me know how and where to buy it. Would love to I donate few filters in rural parts where people are drinking unsafe water.
    My whatsapp number is 9967665227.

  10. SIR,
    I am interested in this product- WATER PURIFIER for my personal Use.
    Also my friends are interested in purchasing this Water Purifier.
    Please mail me the details about Product, the Order to whom is to be placed.
    Or Where this product is easily available for me.

    Cell No. 77099 64599.

  11. I want 10 quantity
    My contact number is 7980252470 and 9883690752
    And i want distributer of your product in West Bengal area. Can you contact me

  12. Niranjan Sir
    Pl. Send me portable water purifier 10Nos.
    I will pay the bill with courier charges
    -Navin Shah
    Lavkush Flats

  13. Sir, I want to get super distributorship for whole Bihar, will I get ?
    Its my cont.- 8986508400 , 8228888400.
    Plz call me

  14. Congratulations…
    Really a big achievement.
    100 needed, would like to donate to poor people who really deserve it..
    My mobile n WhatsApp no is 9422797786.
    Plz share d process to get it

  15. I am thrilled to see this water purifier.where I will get it in Pune? Or send me 10 purifiers Please. I am excited to buy those.


  17. Hello Sir/Ma’am, Thank you so much for your enquiry.
    For order, you can ping me on whatsapp 7795339714
    minimum order quantity would be 50PCs(Due to heavy orders).
    Please acknowledge.

  18. Great, very nice product.
    I want to buy it, as well l can sell it in wholesale..
    Where to contact for business deal, please let me know.
    You can contact me on

  19. It’s absolutely fantastic. Hearty congracts to you. India needs such a great economical innovation. I am from nalgonda district, where water contaminated with florin. It’s very useful to residents of nalgonda district. I need to purchase n distribute to needed one. Need 100 no. Kindly revert back.

    Thanks n regards

  20. Hi Niranjan,

    This is a very good innovation for our society.
    Congrats brother.
    I want know more about this innovation. Old,,…

    Tabrez Raichur
    Whatsapp no. 9113034040.

  21. hello sir product is super sir we want your product send me details please my mobile whats up number7904127176 waiting your massage

  22. Hi niranjan congratulations for your invention.please send your contact no that I can order water filter we require almost 10 PCs . Please send @7977161823

  23. Glad to know about your invention ! Congratulations and wish more such inventions from you.
    Thank you.

  24. Glad to a out your invention and hearty congratulations and wish more such inventions from you.
    Thank you.

  25. Mr Niranjan Congratulations….Im Muzammil From Hydrabad…I’m very much impressed with your innovation, I want to meet you for Business in pls call me..My Mob No..9848025799..

  26. Absolutely Brillient Idea. It is world changing product. Plz go through proper knowlegde of business and scale it up because product is much needed for village people as well as for our country also. Plz tell me how to get this filter in Pune Maharashtra.

  27. Congrats Niranjan,
    May your thrust to improve the quality of drinking water reaches to all villages with affordable price.
    I wish you deserve many more accomplishments in coming days.
    All the best.
    Mohan Babu Uppar

  28. Dear Niranjan

    I wondering to know about your cheapest water purifier.

    I am interested to, please where is the filter available in Chennai.

    Kindly inform me.

  29. Hats off Niranjan I am thrilled this is the product for our country it will help our countryman in saving their health.

  30. Hi Niranjan It’s exciting. Hope you need to take patent rights.

    Hope government may take this as one essential commodity that will be distributed to all people from their end too. And i expect Governing bodies to approach you & take this as one of the public essential product to give all the citizens a benefitiary product for raising the health standards of all of us..

    I don’t know how much Germicidal its is but, It’s really sensible to have such a great product for sure at every house and every individual for that matter.

    In the recent past we used to hear & see such great innovations rovolving in the media; but of late we never used to know how come these sort of revolutionary innovations availability becoming a challenge.

    I am with you & your fantafabulous innovation. Myself being associated with a private Hospital at Vizag as Manager understand the need of the Hour – Clean Drinking Water. And that’s the reason I say Heartful appreciation.





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