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The Robeco Capital Growth Funds have not been registered under the United States Investment Company Act of 1940, as amended, nor or the United States Securities Act of 1933, as amended. None of the shares may be offered or sold, directly or indirectly in the United States or to any U.S. Person (within the meaning of Regulation S promulgated under the Securities Act of 1933, as amended (the “Securities Act”)). Furthermore, Robeco Institutional Asset Management B.V. (Robeco) does not provide investment advisory services, or hold itself out as providing investment advisory services, in the United States or to any U.S. Person (within the meaning of Regulation S promulgated under the Securities Act).

This website is intended for use only by non-U.S. Persons outside of the United States (within the meaning of Regulation S promulgated under the Securities Act who are professional investors, or professional fiduciaries representing such non-U.S. Person investors. By clicking “I Agree” on our website disclaimer and accessing the information on this website, including any subdomain thereof, you are certifying and agreeing to the following: (i) you have read, understood and agree to this disclaimer, (ii) you have informed yourself of any applicable legal restrictions and represent that by accessing the information contained on this website, you are not in violation of, and will not be causing Robeco or any of its affiliated entities or issuers to violate, any applicable laws and, as a result, you are legally authorized to access such information on behalf of yourself and any underlying investment advisory client, (iii) you understand and acknowledge that certain information presented herein relates to securities that have not been registered under the Securities Act, and may be offered or sold only outside the United States and only to, or for the account or benefit of, non-U.S. Persons (within the meaning of Regulation S under the Securities Act), (iv) you are, or are a discretionary investment adviser representing, a non-U.S. Person (within the meaning of Regulation S under the Securities Act) located outside of the United States and (v) you are, or are a discretionary investment adviser representing, a professional non-retail investor. Access to this website has been limited so that it shall not constitute directed selling efforts (as defined in Regulation S under the Securities Act) in the United States and so that it shall not be deemed to constitute Robeco holding itself out generally to the public in the U.S. as an investment adviser. Nothing contained herein constitutes an offer to sell securities or solicitation of an offer to purchase any securities in any jurisdiction. We reserve the right to deny access to any visitor, including, but not limited to, those visitors with IP addresses residing in the United States.

This website has been carefully prepared by Robeco. The information contained in this publication is based upon sources of information believed to be reliable. Robeco is not answerable for the accuracy or completeness of the facts, opinions, expectations and results referred to therein. Whilst every care has been taken in the preparation of this website, we do not accept any responsibility for damage of any kind resulting from incorrect or incomplete information. This website is subject to change without notice. The value of the investments may fluctuate. Past performance is no guarantee of future results. If the currency in which the past performance is displayed differs from the currency of the country in which you reside, then you should be aware that due to exchange rate fluctuations the performance shown may increase or decrease if converted into your local currency. For investment professional use only. Not for use by the general public.

I Disagree

03-21-2025 · Insight

Breadth and depth make water an attractive long-term investment

In contrast to the drama and excitement of AI, water investments can seem calm and placid. But while markets are enamored with AI’s potential, long-term growth opportunities into water infrastructure go quietly unnoticed.

    Authors

  • Dieter Kuffer CFA -  Head of Thematic Investing Water/Healthy Living/Biodiversity/Circular Economy

    Dieter Kuffer CFA

    Head of Thematic Investing Water/Healthy Living/Biodiversity/Circular Economy

  • Jindapa (Amy) Wanner-Thavornsuk CFA  - Co-Portfolio Manager

    Jindapa (Amy) Wanner-Thavornsuk CFA

    Co-Portfolio Manager

Summary

  1. Water is a strong, stable but sometimes underappreciated theme

  2. Diverse structural trends are driving water infrastructure investments

  3. Robust, multi-year investment cycles support long-term growth

Here we underscore some of the overlooked headlines in regions worldwide that show the strong spending momentum in water-related projects. Funding flows are substantial in scope involving multi-decade, multi-billion investments spent on solutions across the water value chain.

Italy – Storms and wastewater driving investments

Severe rainfall and floods are becoming chronic for regions throughout Italy. The city of Bologna and the province of Ravenna in its Emilia-Romagna region were the latest hit with extensive flood damage because of severe storms. In response to a series of storms the last striking in September 2024, regional authorities are investing EUR 1.2 billion for over 100 projects that will repair networks as well as build storm water infrastructure to prevent future floods and damage. Projects include raising river embankments, enlarging overflow tanks and canals and installing bulkheads in rivers. 1

Figure 1 – Construction sites in Emilia-Romagna

Figure 1 – Construction sites in Emilia-Romagna

In other regions, heatwaves and droughts are exacerbating another of Italy’s chronic problems – water scarcity. To help alleviate supply strains, the national government has allocated EUR 600 million to modernize sanitation systems which should allow more wastewater to be used to satisfy industrial water demand.2

The township of Calvisano in the northern region of Brescia illustrates how communities are putting those funds to work. They are nearing completion of an EUR 81 million wastewater treatment plant to purify and reuse water for crop irrigation and industry.3 In addition to adding more wastewater plants, over the next five years, another EUR 321 million will be used to add more distribution mains as well as install smart metering systems to reduce water loss.

Switzerland – Preparing for climate extremes

The city of Zurich, Switzerland’s most populous city, is investing EUR 186 million to redirect storm water from the Sihl River which flows through its center to Lake Zurich on its eastern edge. The project, which includes the construction of a 2 km long tunnel, is designed to minimize catastrophic flash flooding, the economic toll of which could extend well beyond EUR 7 billion.4,5

Figure 2 – Under the Sihl

Figure 2 – Under the Sihl

Computer modeling (left) and building site (right) of an underground tunnel that will channel storm waters from the Sihl River to Lake Zurich. Source: City of Zurich, Water Projects. February 2025.


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Zurich’s city officials deemed the investments necessary despite the relatively low risk for a flood of this magnitude (estimated at once every 500 years). However, IPCC scientists warn that climate change is wreaking havoc on weather systems, making once rare events more frequent and intense.

Germany – H₂0 meets AI

The city of Dresden in eastern Germany is investing EUR 630 million to secure water supplies for Europe’s largest semiconductor cluster through 2038.6 The Silicon Saxony region is expected to double (and possibly triple) its water demand in the coming decades with consumption increases from market-leading chip makers such as Infineon, GlobalFoundries, Bosch and X-Fab. The region’s wastewater volumes are expected to rise 240% with the addition of a multi-billion euro wafer fab from the European Semiconductor Manufacturing Company (ESMC), a joint venture between Taiwan’s TSMC and several other European-based chip manufacturers.7

Investments will go toward capturing, cleaning and channeling surface waters from the nearby River Elbe for use by industrial users. It will also involve intensive wastewater treatment so that the majority (80-90%) of water withdrawn can be safely returned to the Elbe.8 Those include an 11km long discharge canal, new aeration basins, a blower station for biological waste treatment as well as new digestors and clarifiers for sludge treatment.9

Figure 3 – The complexity of wastewater treatment

Figure 3 – The complexity of wastewater treatment

Examples of wastewater aeration tanks, with and without wastewater. Wastewater treatment involves multiple steps involving many types of technical infrastructure. Source: Wastewater Digest, SA Five Engineering, Veolia, February 2025.


France – In the avant-garde against PFAS

The Île-de-France region in north-central France is going on the offensive against micropollutants. SEDIF (Syndicat des Eaux d’Île-de-France), the standard-setting water utility for the Paris region, is investing EUR 1 billion on advanced purification systems that remove micropollutants such as PFAS from tap water supplies. The new technique will combine nano-filtration and low-pressure reverse osmosis and will be capable of catching particles that are 100,000 times smaller than the width of a human hair.10

Figure 4 – Conventional to sophisticated water treatment

Figure 4 – Conventional to sophisticated water treatment

Conventional water treatment (micro-filtration membranes, left) can capture larger macro particles from water supplies. More sophisticated filtration is needed to remove increasingly complex industrial pollutants (nano-filtration, right). Source: Lubron UK. March 2025.


PFAS levels have been a contentious issue worldwide after decades of research have shown them to be toxic to humans and the environment. For Parisians, the problem hit close to home when unusually high concentration levels were found in tap water samples. 11 The new purification technology will be installed in two water treatment plants in Val-de-Marne and Seine-Saint-Denis, with upgrades made to a third in Mery-sur-Oise all of which serve Paris and surrounding regions. All facilities should be fully operational by 2032.12

PFAS are a family of chemicals still widely used across industries. However, rising concentrations in waterways and soils are concerning scientists, regulators and citizens. SEDIF will use the results from these plants to later deploy advanced techniques to remove PFAS at utility scales among its industrial manufacturers. 13

England and Wales – Addressing water woes with investment flows

England’s swelling water problems have pushed Ofwat, the national water regulator, to allow record levels of spending to improve water infrastructure. The Asset Management Plan 8 (AMP8), published in December 2024, enables utilities to invest a combined EUR 126 billion (GBP 104 billion) in water projects over the next five years. That’s a 76% increase over AMP7, its predecessor covering 2020-2025.14

Figure 5 – Ofwat’s unprecedented investment plans

Figure 5 – Ofwat’s unprecedented investment plans

Regions of planned water infrastructure investments. Source: Ofwat, Price Determinations Report, 2024.
1 GBP = 1.21EUR, Bank of England exchange rate as of 31 December 2024

Chronic underinvestment in infrastructure and maintenance has resulted in a system that leaks up to 1 trillion liters of water each year (about a fifth of treated water supplies). 15 Moreover, extended summer heatwaves in 2022 and 2023 drained half of England’s reservoirs to exceptionally low levels and left London with just three and half weeks of water storage. 16,17 The plan enables new reservoirs, which can store rainwater and runoff in wet periods to alleviate water shortages in dry ones, to be built, something that hasn’t happened in three decades. 18

Conclusion

Regional investments not only demonstrate the geographic but also the sectoral diversity captured by Robeco’s Sustainable Water strategy. It enjoys strong exposure to the vast universe of companies furnishing industrial-scale infrastructure and also benefits from the growth of chips and data centers that undergird the digital economy of the future. New structural drivers are also emerging that provide new areas of growth, such as mitigating the risks of climate change and reducing the threats of emerging contaminants in water supplies.

Such breadth and depth make the strategy a nearly ‘water-tight’ investment opportunity for the long-term.

Important note: The companies cited in this article are for illustrative purposes only to demonstrate the investment strategy as of 28 February 2025. The companies are not necessarily held by the strategy. Moreover, no inference can be made on the future development of the company.

Sustainable Water D USD

performance ytd (02/28)
0.01%
Performance 3y (02/28)
1.92%
since inception (02/28)
6.07%
total size of fund (02/28)
3029mln
morningstar (02/28)
View the fund
Past performance is no guarantee of future results. The value of the investments may fluctuate. Annualized (for periods longer than one year). Performances are net of fees and based on transaction prices.

Footnotes

1 Il Post, February 2025. Il nuovo piano dell'Emilia-Romagna contro le alluvioni.
2 Italian Government, Presidency of the Council of Ministers. Investments in sewerage and sanitation.
3 La Repubblica, March 2025. A2A inaugura il depuratore di Calvisano: pilastro di un maxi-piano da 81 milioni per l’acqua.
4 175 mm CHF, converted using Swiss National Bank exchange rate of EUR = 0.94 CHF 4 March 2025.
5 Canton of Zurich, Relief Tunnel. Accessed February 2025. Entlastungsstollen Sihl-Zürichsee | Kanton Zürich.
6 Zeitung für kommunale Wirtschaft, October 2023. Neues Abwasserbeseitigungskonzept für Dresden bis 2038.
7 Global Construction Review, August 2024. ESMC represents a joint venture between Taiwan’s TSMC (which has a 70% stake), German firms Bosch and Infineon, and the Netherland’s NXP Semiconductors, each with 10% ownership. The plant will also receive EUR 5 billion in state aid.
8 Silicon Saxony website, September 2023. New river waterworks on the Elbe decouples water supply for industry and population.
9 Ibid.
10 Les Echos, December 2024. Le puissant Syndicat des eaux d'Ile-de-France investit un milliard dans ses usines.
11 RFI, January 2025. Tap water in French cities contaminated by toxic forever chemicals.
12 L’Eau, L’Industrie, Les Nuisances, February 2025. Le Sedif met en service des pilotes de filtration membranaire haute performance - La Revue EIN.
13 Ibid.
14 Ofwat, Final Price Review Report, December 2024.
15 Financial Times, August 2023. Parts of England at risk of running out of water…
16 Ibid.
17 Financial Times, September 2023. The UK is at risk of running low on water. Why?
18 Ibid.

Robeco

Robeco aims to enable its clients to achieve their financial and sustainability goals by providing superior investment returns and solutions.

Important information
The Robeco Capital Growth Funds have not been registered under the United States Investment Company Act of 1940, as amended, nor or the United States Securities Act of 1933, as amended. None of the shares may be offered or sold, directly or indirectly in the United States or to any U.S. Person (within the meaning of Regulation S promulgated under the Securities Act of 1933, as amended (the “Securities Act”)). Furthermore, Robeco Institutional Asset Management B.V. (Robeco) does not provide investment advisory services, or hold itself out as providing investment advisory services, in the United States or to any U.S. Person (within the meaning of Regulation S promulgated under the Securities Act).
This website is intended for use only by non-U.S. Persons outside of the United States (within the meaning of Regulation S promulgated under the Securities Act who are professional investors, or professional fiduciaries representing such non-U.S. Person investors. By clicking “I Agree” on our website disclaimer and accessing the information on this website, including any subdomain thereof, you are certifying and agreeing to the following: (i) you have read, understood and agree to this disclaimer, (ii) you have informed yourself of any applicable legal restrictions and represent that by accessing the information contained on this website, you are not in violation of, and will not be causing Robeco or any of its affiliated entities or issuers to violate, any applicable laws and, as a result, you are legally authorized to access such information on behalf of yourself and any underlying investment advisory client, (iii) you understand and acknowledge that certain information presented herein relates to securities that have not been registered under the Securities Act, and may be offered or sold only outside the United States and only to, or for the account or benefit of, non-U.S. Persons (within the meaning of Regulation S under the Securities Act), (iv) you are, or are a discretionary investment adviser representing, a non-U.S. Person (within the meaning of Regulation S under the Securities Act) located outside of the United States and (v) you are, or are a discretionary investment adviser representing, a professional non-retail investor.


Access to this website has been limited so that it shall not constitute directed selling efforts (as defined in Regulation S under the Securities Act) in the United States and so that it shall not be deemed to constitute Robeco holding itself out generally to the public in the U.S. as an investment adviser. Nothing contained herein constitutes an offer to sell securities or solicitation of an offer to purchase any securities in any jurisdiction. We reserve the right to deny access to any visitor, including, but not limited to, those visitors with IP addresses residing in the United States. This website has been carefully prepared by Robeco. The information contained in this publication is based upon sources of information believed to be reliable. Robeco is not answerable for the accuracy or completeness of the facts, opinions, expectations and results referred to therein. Whilst every care has been taken in the preparation of this website, we do not accept any responsibility for damage of any kind resulting from incorrect or incomplete information. This website is subject to change without notice. The value of the investments may fluctuate. Past performance is no guarantee of future results. If the currency in which the past performance is displayed differs from the currency of the country in which you reside, then you should be aware that due to exchange rate fluctuations the performance shown may increase or decrease if converted into your local currency. For investment professional use only. Not for use by the general public.