4 Companies Sustaining Water Supplies

Jun. 10, 2022 3:40 AM ETAQWA, ECL, ERII, MWA, XYL5 Likes
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  • Globally, there is a roughly 30% disparity between the volume of water utilities deliver and the amount of water billed.
  • Antiquated wastewater management systems can also compromise clean water supplies, particularly those that are not calibrated for climate change.
  • In this piece, we highlight four companies in the Global X Clean Water ETF (AQWA) that could help optimize water use or otherwise mitigate future shortages.

A robot"s hand that scoops up safe and clean water.

Yuuji/E+ via Getty Images

More than 3.5 billion people currently experience water scarcity, and 10% of the global population lives in countries that the United Nations considers to have high or critical levels of water scarcity.1,2 In addition to representing a grave health concern, limited access to clean water disrupts segments ranging from agricultural production to hydroelectric generation to semiconductor manufacturing. Unfortunately, water shortages are expected to proliferate, with as many as 5 billion people forecasted to experience water scarcity by 2050.3 However, companies are working to improve the water cycle and promote more thoughtful approaches to our precious water resources.

In this piece, we highlight four companies in the Global X Clean Water ETF (AQWA) that could help optimize water use or otherwise mitigate future shortages.

  • Xylem (XYL): Offers a wide array of optimization solutions for water transportation and treatment
  • Mueller Water Products (MWA): Manufactures water distribution and measurement products
  • Ecolab (ECL): Develops technology and services for water treatment and purification
  • Energy Recovery (ERII): Produces equipment used in the desalination process

Xylem: Using Every Drop of Water

Fundamental vulnerabilities in how clean water and wastewater are transported result in needless water loss. Leaky distribution pipes are difficult to detect quickly and can result in significant volumes of lost water if left unattended. This issue is so prominent in North America that an estimated 20–50% of water is lost in distribution.4 Globally, there is a roughly 30% disparity between the volume of water utilities deliver and the amount of water billed. According to the World Bank, the water lost costs the global economy $14 billion annually.5

Antiquated wastewater management systems can also compromise clean water supplies, particularly those that are not calibrated for climate change. Consequently, system operators often have little ability to prevent disruption when sudden weather events wreak havoc on facilities. Sewage overflows are common after flooding or heavy precipitation events, resulting in contaminated water supplies. Last year, storm overflows in the United Kingdom dumped raw sewage into rivers and seas about 373,000 times.6

To improve water management, Xylem Inc. deploys smart water innovations that use sensors, automation, and data analysis. Its virtual district metering areas (vDMAs) interpret information from flow meters to detect when leaks occur. In Park City, Utah, Xylem’s VDMA services reduced leaks by 10%.7 The vDMA framework merged acoustic, pressure, and flow rate data to identify three times the amount of water loss than was previously known.8

In another case, Xylem leveraged digital monitoring in South Bend, Indiana to reduce sewer overflows by 70%.9 Internet of Things (IoT) analytics informed better decision-making during storms and allowed system operators to pre-emptively clean sewage blockages. Besides water savings, the system reduced E. coli concentrations in a local river by 50%.10

Utilities around the world are embracing smart water technologies to boost efficiency and water savings. Water utility spending on digital technologies could increase at a compound annual growth rate (CAGR) of 9% between 2020 and 2025, compared to a 3% CAGR for all other spending.11 Accordingly, Xylem aims to derive 50% of total revenues from digital products and services by 2025, up from 35% in 2021.12 Further adoption of digital water equipment could act as margin catalyst for Xylem, as digitally augmented gear and accompanying service contracts are often more profitable than other business lines.

xylem initiatives

Mueller Water Products: Upgrading Decrepit Water Infrastructure

Another avenue to save water could be to upgrade aging infrastructure. In the United States, 6 billion gallons are lost annually due to leaky pipes, amounting to $7.6 billion in losses in 2019.13 Dated infrastructure can also be dangerous because it preserves obsolete design practices. As many as 22 million Americans still drink water delivered by lead pipes, even though lead pipes were outlawed for use in the country’s public water systems in 1986.14,15

The now infamous Flint, Michigan water crisis highlighted such an oversight, as close to 100,000 residents were exposed to lead-contaminated drinking water.16 Severe outcomes ranging from hair loss to birth complications in Flint demonstrate the importance of protecting populations from the design flaws of the past.17,18 To date, the city has replaced more than 90% of relevant lead pipes and could complete this process by September 2022.19,20

The recently passed Infrastructure Investment and Jobs Act (IIJA) directs $55 billion over five years toward various water initiatives in the United States and addresses outdated water infrastructure.21 One of the largest water-related line items in the bill is $15 billion to remove and replace lead pipes, which is enough to eliminate an estimated 25% of the lead pipes in the United States.22

We expect IIJA investments to potentially boost demand for water distribution and control equipment. As local governments replace lead pipeline systems, they will need more than just new pipes. Mueller Water Products is a company that specializes in flow control equipment in North American markets, with over 90% of revenues derived from the United States.23 Relevant products include iron gates, service brass products, pipe repair components, and specialty valves to control water pressure in pipelines. The company is also establishing a new brass foundry designed to forge components made from lead-free brass alloys. This foundry, which is set to begin operations in 2023, could help the company distinguish itself as a manufacturer of safely sourced water equipment.24 This focus on U.S. markets and key offerings may position the Mueller Water Products to support some of the water initiatives set forth by the IIJA.

water initiative

Ecolab: Boosting Global Water Hygiene

Further development of water sanitation systems could facilitate the safe reuse of water, effectively boosting supplies. At least 2 billion people lack access to safely managed drinking water, and only about half of the world’s population use safely managed sanitation services.25,26 Current sanitation systems offer even less coverage than these metrics might suggest. Globally, 80% of wastewater flows back into the environment without being treated or reused, putting billions at risk of diseases such as cholera, dysentery, typhoid, and polio.27 Besides pathogens, wastewater often contains contaminants such as phosphorous, nitrogen, and industrial metals.

Sanitation coverage has improved in recent decades, with 74% of the world’s population having access to safely managed drinking water as of 2020, compared to 62% in 2000.28 Still, sanitation improvement remains a slow and uneven process. In 2020, only 29% of people living in countries the World Health Organization (WHO) classified as low-income had access to clean drinking water facilities.29

Water purification companies with broad global footprints, such as Ecolab, could prove instrumental in building out wastewater treatment efforts on the industrial side. Ecolab maintains a global presence, providing water treatment equipment, chemicals, and consulting services in more than 170 countries.30 The company’s offerings include chemicals and coagulants, primary wastewater treatment, osmosis membranes, dewatering chemicals, household filters. See our piece, Introducing the Global X Clean Water ETF (AQWA), for an overview of the wastewater treatment process. The company also caters its sanitation expertise toward industries such as food service, hospitality, healthcare, chemical processing, minerals, and power generation.

A diverse business model has allowed Ecolab to accommodate a wide array of needs within the clean water space. In addition to organic growth and continued acquisition activity, the company could find opportunity serving the expanded needs of pre-existing customers. Wastewater treatment is a complex process that often can be improved upon at multiple points. Ecolab’s integration allows the company to address multiple needs from the same customer, which can lead to repeat revenue streams. Growing corporate emphasis on sustainability could also act as a tailwind. Ecolab focuses on boosting the efficiency of sanitation processes, an attractive prospect for companies who are likely to pursue incentives for reducing their energy and water footprints. Thanks to efforts to diversify and expand its offerings, Ecolab is estimated to serve a potential market of $150 billion worldwide, up from $100 billion in 2011.31,32

investment needed

Energy Recovery: Sourcing Drinking Water from the Ocean

Another strategy to improve water supplies is to simply source more of it. Desalination is a process that removes salt and other minerals from seawater or brackish groundwater and converts it to fresh water. Although the desalination industry remains in its early stages, it is a technology deployed at scale that already provides clean water to more than 300 million people globally.33 Further adoption of desalination could tap into the 97.2% of the world’s water that is contained in the ocean and greatly expand the amount of freshwater available.34 Besides bolstering water supplies, desalination could protect against some of the impacts of climate change. Rising ocean levels are expected to permeate into aquifers and coastal freshwater sources, in some cases rendering these resources undrinkable.35

Energy Recovery provides equipment meant to bolster efficiencies of industrial fluid-flow markets worldwide, with a primary focus on reverse osmosis seawater desalination. Energy Recovery’s product suite includes pumping systems, turbochargers, and pressure exchangers for desalination plants. Such products specifically seek to mitigate one of the biggest issues with desalination: high energy intensity. Energy use accounts for 50-60% of total desalination costs, thus power conservation could decrease costs and encourage adoption of the technology.36 In 2020, the company’s line of pressure exchange devices saved desalination customers $2.6 billion in energy costs and avoided 12.5 million metric tons of carbon emissions.37 On a facility basis, pressure exchangers can reduce energy use by 60%.38

market size


The increasing impact of water scarcity and the threat of further shortages cannot be ignored. Water is essential to life and a basic human right, never mind its role as an economic cornerstone. Fortunately, the private sector continues to innovate in areas such as smart water optimization, infrastructure replacement, advanced water purification, and water sourcing. In our view, companies in these spaces, like Xylem, Mueller, Ecolab, and Energy Recovery, could potentially benefit as the world increases its investments in strategies designed to avoid the worst water shortage outcomes.

Related ETFs

AQWA: The Global X Clean Water ETF seeks to invest in companies advancing the provision of clean water through industrial water treatment, storage and distribution infrastructure, as well as purification and efficiency strategies, among other activities.

Click the fund name above to view the fund’s current holdings. Holdings subject to change. Current and future holdings subject to risk.


  1. UNESCO World Water Assessment Programme. (2021, March 21). The United Nations world water development report 2021: Valuing water. United Nations Educational, Scientific and Cultural Organization. https://unesdoc.unesco.org/ark:/48223/pf0000375724
  2. Food and Agriculture Organization of the United Nations & United Nations Water. (2021). Progress on level of water stress: Global status and acceleration needs for SDG indicator 6.4.2. Rome. Document card | FAO | Food and Agriculture Organization of the United Nations
  3. Samel, M. (2022, February 17). Global water agenda: What to expect in 2022. Economist Impact. Global water agenda: What to expect in 2022
  4. Alawadhi, A., & Tartakovsky, D. M. (2020, February 12). Bayesian update and method of distributions: Application to leak detection in transmission mains. Water Resources Research, 56(2), 1-10. https://doi.org/10.1029/2019WR025879
  5. Xylem. (2021, September 9). Optimizing leak detection with a virtual DMA: Progressive utilities are leveraging technology to improve the economics of water management [White paper]. https://www.xylem.com/siteassets/support/white-papers/white-paper-resources/wp_optimizingleakdetection_0921.pdf
  6. Wilcock, D. (2022, March 31). Raw sewage was dumped into English rivers and seas 372,533 times last year and taxpayers will pick up bill as ageing sewer systems struggle to cope with population growth and more extreme weather. The Daily Mail. Raw sewage dumped into English rivers and seas 372,533 times last year
  7. Xylem. (n.d.). Park city reduces water loss by 10% using leak detection and pressure monitoring [White paper]. Accessed on June 2, 2022 from Park City, Utah Reduces Water Loss by 10% Using Leak Detection and Pressure Monitoring | Xylem US
  8. Ibid.
  9. Ruggaber, T., & Fahey, K. (2021, January 26). How the city of South Bend saved $400m and reduced CSOs by 70% [Webinar]. https://www.xylem.com/en-us/about-xylem/newsroom/events/webinar-how-the-city-of-south-bend-saved-$400m-and-reduced-csos-by-70/
  10. Ibid.
  11. Latino, M., Hackett, G., & Pilla, M. (2021, September 30). Xylem: 2021 investor day. Xylem. https://xyleminc.gcs-web.com/static-files/f705f8b0-7c6e-4af8-bdee-2e90fcb7d7c2
  12. Ibid.
  13. ASCE Members & Staff. (2021). A comprehensive assessment of America’s infrastructure. American Society of Civil Engineers. https://infrastructurereportcard.org/wp-content/uploads/2020/12/National_IRC_2021-report.pdf
  14. Environmental Protection Agency. (2022, April 27). Use of lead free pipes, fittings, fixtures, solder, and flux for drinking water. Use of Lead Free Pipes, Fittings, Fixtures, Solder, and Flux for Drinking Water | US EPA
  15. Rosenthal, L., & Craft, W. (2020, May 4). Buried lead: How the EPA has left Americans exposed to lead in drinking water. APM Reports. How the EPA has left Americans exposed to lead in drinking water
  16. Miettinen, D. (2022, April 27). Looking back at the Flint water crisis, eight years on. Marketplace. Looking back at the Flint water crisis, eight years on
  17. Dean, J. (2021, April 15). Water crisis took toll on Flint adults’ physical, mental health. Cornell Chronicle. Water crisis took toll on Flint adults' physical, mental health | Cornell Chronicle
  18. Kristofferson, M. (2021, October 19). Flint water crisis worsened birth outcomes, disproportionally affected black babies, YSPH study finds. Yale School of Public Health. Flint Water Crisis Worsened Birth Outcomes, Disproportionally Affected Black Babies, YSPH Study Finds
  19. Walton, B. (2022, May 2). After decades of neglect, bill coming due for Michigan’s water infrastructure. Michigan Radio. After decades of neglect, bill coming due for Michigan's water infrastructure
  20. Borowy, S., & Bleu, R. (2022, April 14). Flint extends deadline to replace lead pipes by September 2022. WNEM. Flint extends deadline to replace lead pipes by September 2022
  21. Infrastructure Investment and Jobs Act, Pub. L. No. 117-58, 135 Stat. 429 (2021). https://www.congress.gov/117/plaws/publ58/PLAW-117publ58.pdf
  22. Ibid.
  23. Mueller Water Products, Inc. (2021, September 30). Form 10-K. United States Securities and Exchange Commission. Retrieved from http://otp.investis.com/clients/us/mueller_water_products/SEC/sec-show.aspx?FilingId=15367987&Cik=0001350593&Type=PDF&hasPdf=1
  24. Mueller Water Products, Inc. (2022, May 2). Mueller Water Products reports 2022 second quarter results. Seeking Alpha. Mueller Water Products Reports 2022 Second Quarter Results
  25. World Health Organization. (2022, March 21). Drinking-water. Drinking-water
  26. World Health Organization. (2022, March 21). Sanitation
  27. United Nations Water. (n.d.). Water quality and wastewater. Accessed on June 2, 2022 from Quality and Wastewater | UN-Water
  28. Ritchie, H., & Roser, M. (2021, June). Clean water. Our World in Data. Clean Water and Sanitation
  29. Ibid.
  30. Ecolab. (n.d.). About Ecolab. Accessed on June 2, 2022 from About Ecolab | We Circle The Globe
  31. Ecolab. (2022, January). Impacting what matters: 2021 annual report. https://s24.q4cdn.com/931105847/files/doc_financials/2021/ar/Annual-Report-2021.pdf
  32. Ecolab. (2012, February). Working as one: Annual report 2011. https://s24.q4cdn.com/931105847/files/doc_financials/annual/2011-annual-report.pdf
  33. Robbins, J. (2019, June 11). As water scarcity increases, desalination plants are on the rise. Yale Environment 360, Yale School of the Environment. As Water Scarcity Increases, Desalination Plants Are on the Rise
  34. Mullen, K. (d.). Information on Earth’s water. National Ground Water Association. Accessed on June 2, 2022 from Groundwater | Information on Earth's water
  35. Climate Hubs. (d.). Saltwater intrusion and salinization on coastal forests and farms. U.S. Department of Agriculture. Accessed on June 2, 2022 from Saltwater Intrusion and Salinization on Coastal Forests and Farms
  36. Zarzo, D., Prats, D. (2018, February 1). Desalination and energy consumption. What can we expect in the near future? Desalination, 427, 1-9. Redirecting
  37. Energy Recovery. (d.). Scalable solutions for global desalination. Accessed on June 2, 2022 from Water
  38. Energy Recovery. (n.d.). PX® Pressure Exchanger®: Best-in-class energy recovery. Accessed on 2, June 2022 from PX Pressure Exchanger

The views and estimates contained herein are for informational purposes only, and are subject to change. It is not intended to be a forecast of future events or a guarantee of future results, and should not be relied upon as advice.

References to securities are not a recommendation to buy or sell.

Investing involves risk, including the possible loss of principal. The investable universe of companies in which AQWA may invest may be limited. International investments may involve risk of capital loss from unfavorable fluctuation in currency values, from differences in generally accepted accounting principles or from social, economic or political instability in other nations. Emerging markets involve heightened risks related to the same factors as well as increased volatility and lower trading volume. Clean Water Companies typically face intense competition, short product lifecycles and potentially rapid product obsolescence. Clean Water Companies are subject to significant regulation regarding the usage, treatment, and distribution of water. Clean Water Companies may also be adversely affected by the impact of global climate change on the available supply of clean water reserves. AQWA is non-diversified.

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Carefully consider the fund’s investment objectives, risks, and charges and expenses. This and other information can be found in the fund’s full or summary prospectuses, which may be obtained at globalxetfs.com. Please read the prospectus carefully before investing.

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