I have been paying close attention to the water utility sector recently and found that this field is actually quite worth a deeper look. Although the U.S. water supply system operates stably, the issue of aging infrastructure is becoming increasingly prominent, with water pipe bursts occurring every two minutes. Behind this are substantial investments needed.

Interestingly, falling interest rates are a major boon for capital-intensive companies like these. The Federal Reserve has lowered rates from the high of 5.25%-5.50% to 4.25%-4.50%, which means water utility companies’ financing costs have dropped significantly—creating a great window for them to plan large-scale infrastructure projects. If interest rates may continue to fall in the future, it will provide positive support for the valuation and performance of clean water stocks.

Another trend is industry consolidation. The U.S. has more than 50,000 community water systems and 14,000 wastewater treatment systems. Many small water utilities lack the funding to upgrade aging infrastructure, which gives large companies opportunities to expand through mergers and acquisitions. While this kind of consolidation progresses slowly, in the long run it is crucial for improving service quality and reducing costs. On the government side, it is also being driven forward; bipartisan infrastructure legislation has already pledged $50 billion to improve these systems.

When looking at specific clean water stocks, there are a few worth watching. American Water Works Company (AWK) is the largest, with a broad service coverage. It plans to invest $3.3 billion in 2025, and in the next five years its investment scale is expected to be between $17.0 billion and $19.0 billion—this kind of scale and commitment to investment is top-tier in the industry. Sabesp (SBS), based in São Paulo, Brazil, plans to invest $10.6 billion from 2024 to 2029. In the past 60 days, its 2025 earnings forecast has been raised by 7.9%. Its dividend yield of 1.88% is also solid.

If you want smaller-cap options, Artesian Resources and Middlesex Water are both good targets. Artesian plans to invest $46.4 million in 2025 to strengthen infrastructure. Its recent earnings forecast has also been raised by 8%, and its dividend yield is 2.3%. Middlesex Water is also steadily investing, and its dividend yield is also 2.3%. Even though these clean water stocks have slightly lagged the broader market over the past year (up 11.1% versus the S&P 500’s 11.4%), valuation-wise they truly appear undervalued—the current EV/EBITDA multiple is 11.27x, far below the S&P 500’s 16.85x and the utility sector’s 15.09x.

The entire water utilities industry ranks in the top 19% of Zacks’ rankings, and analysts generally have a positive outlook on these companies’ earnings growth. While it’s not the most exciting investment theme, clean water stocks, as a defensive allocation, still offer stable growth potential over the long term.