Ilan Katz
A salt-based liquid desiccant in a container, 40 litres an hour in arid air.
Sponsored researchIn-development
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Receive a weekly email digest of the latest drinking water purification solutions added by the network.Browse 395 solutions in drinking water purification on the Halo network
Updated Nov 2, 2026
Drinking water purification covers producing water a person can drink, and removing what stops them. On Halo, the solutions cover water from air: sorbents and desiccants, water from air: condensation and passive capture, electrochemical removal and disinfection, and softening and scale. Sign up to search the full network and post your specific need.
Water from air: sorbents and desiccants
Ilan Katz
RB
Awn nanotech · Supplier
Carbon nanomaterials pulling 1.2g of water per gram of sorbent in half an hour.
Sponsored researchIn-development
RG
PRD Tech, Inc. · Startup
A liquid that absorbs water in desert air, so nothing has to be condensed.
Sponsored researchIn-development
Water from air: condensation and passive capture
JK
H2OLL · Supplier
A two-stage cycle producing 1,000 litres a day on little energy.
In-development
PB
WaterMaker International, LLC · Supplier
Refrigeration-based condensation with twenty years of field units behind it.
Sponsored researchIn-development
Electrochemical removal and disinfection
DJ
University of California, Los Angeles
A conductive porous membrane electrode taking chloramines under 0.1 mg/L in one pass.
Sponsored researchIn-development
MP
STE - Sanitizing Technologies and Equipments · Startup
A compact UV-C LED module built to drop into a dispenser or an appliance.
In-development
Softening and scale
MH
Arizona State University
Countercurrent fluidization crystallizes out 80% of hardness, and nothing clogs.
Sponsored researchIn-development
DJ
University of California, Los Angeles
Alternating potentials on the membrane stop mineral scale before it nucleates.
Sponsored researchIn-development
Adsorbents and low-energy desalination
GM
University of Illinois, Urbana-Champaign
Activated carbon from corn stover and switchgrass at a third of the usual cost.
Sponsored researchIn-development
SR
PhytoCentric Solutions LLC · Startup
A biofilm from lung surfactant attracts salt into its pores at a tenth the energy.
Sponsored researchIn-development
Confirming the water is safe
NC
Quantitative BioSciences, Inc. · Supplier
Nanobodies in a handheld kit, watching for endotoxins continuously.
Sponsored researchIn-development
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Who is working on drinking water purification
Organizations in drinking water purification
Universities, startups, and suppliers with solutions in drinking water purification.
Drinking water purification organizations
Innovators in drinking water purification
Researchers and inventors advancing drinking water purification.
Drinking water purification expertsAbout drinking water purification
Making water out of air is the largest single theme on Halo, with eleven entries splitting between sorbents, liquid desiccants, refrigeration and passive surfaces. The rest treat water that already exists: chloramines and metals pulled out electrochemically, hardness removed by crystallization, and a handful of tests to prove it worked. On Halo it spans six groups, including water from air: sorbents and desiccants, water from air: condensation and passive capture, and electrochemical removal and disinfection.
Stage of development. Work on drinking water purification on Halo comes mostly from companies. 33% of the solutions are in market. Arizona State University has the most, followed by Clarkson University. Co-development and sponsored research are the usual partnering routes, and about 54% of the solutions that state terms offer pilot engagements.
Three trends in drinking water purification on Halo
Eleven ways to take water out of air. Six use a sorbent or a desiccant, five condense or capture passively. The claims are specific and comparable: 0.18 kWh per litre, 1,000 litres a day, 5,000 litres a day, 1.2g of water per gram of sorbent, operation down to 7% relative humidity. One skips energy entirely, using wavy surfaces copied from a desert plant to catch dew and fog.
Chloramine is the contaminant of the moment. Four separate electrochemical entries target it, three of them from universities: a flow-through membrane electrode reaching under 0.1 mg/L in a single pass, Magneli phase titanium oxide converting it to nitrogen gas and chloride, and a filter that handles chloramines and heavy metals together. Disinfection byproducts have become their own removal problem.
Energy per litre is the number that matters. Almost every entry leads with it. A desalination biofilm claiming 10 to 15% of conventional energy, softening at one volt with 98% salt removal, activated carbon at a third of the usual cost, atmospheric generation quoted per kilowatt hour per litre. Where the water comes from varies; the thing they compete on does not.
342organizations
395solutions listed
61%from startups and companies
33%in market
Frequently asked questions
What is drinking water purification?
Drinking water purification covers producing water a person can drink, and taking out what stops them. It spans atmospheric water generation by sorbent, desiccant or condensation, electrochemical removal of chloramines and heavy metals, softening and scale control, adsorbents and low-energy desalination, and the tests that confirm the result is safe. Utilities, equipment makers and off-grid operators are the buyers.
What are examples of drinking water purification?
Five examples of drinking water purification solutions on Halo include:
- A salt-based liquid desiccant in a container, 40 litres an hour in arid air. (H2OLL)
- A two-stage cycle producing 1,000 litres a day on little energy. (H2OLL)
- A conductive porous membrane electrode taking chloramines under 0.1 mg/L in one pass. (University of California, Los Angeles)
- Countercurrent fluidization crystallizes out 80% of hardness, and nothing clogs. (Arizona State University)
- Activated carbon from corn stover and switchgrass at a third of the usual cost. (University of Illinois, Urbana-Champaign)
Which companies and suppliers are developing drinking water purification?
There are 342 organizations with drinking water purification solutions on Halo, 106 of them universities and research institutions. Among them are H2OLL, Awn nanotech, and PRD Tech, Inc.. Most offer co-development or sponsored research. Sign up to see every organization working in the area and to send them your specific need.
How do I find drinking water purification research partners?
Browsing drinking water purification solutions on Halo is free. Sign up to search the full network and save the ones you want. Post your specific need to get exact matches. Organizations reply directly on the platform.
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