Christophe Beck
Chairman and Chief Executive Officer at Ecolab
Thank you so much, Andy, and welcome to everyone on the call. And let me start by thanking our incredible team for their hard work and seamless execution this quarter again. It's because of our team's endless dedication to our customers and commitment to our goals that I have the pleasure of sharing another excellent quarter, delivering broad-based performance across our businesses, end markets and geographies. Our company has never been as healthy as it is today, and I'm proud to lead such a talented team with such a great future.
Moving to the specifics of our performance. Our third quarter was highlighted by strengthening volume growth continued strong value pricing and robust operating income margin expansion. These all combined to deliver 19% growth in adjusted earnings. With this strong momentum, we are increasing once again the midpoint of our full year earnings guidance range. As expected, organic sales grew 4% and with very healthy growth across our businesses. Importantly, volume growth improved to 2% driven by strong business wins and breakthrough innovation. The Ecolab team also delivered solid value pricing. At the same time, in our targeted 2% to 3% range in a quarter where carryover pricing is at zero and new pricing for 2025 is not in yet.
In a world that remains hard to predict, our solutions are more essential than ever to our customers. Backed by our reliable supply and global expertise, our unique technologies are recognized to dramatically enhance productivity while significantly reducing water and energy usage. This solid top line growth helped to further increase our gross margin 220 basis points to 43.5%. Our SG&A productivity also improved consistent with our long-term trends. In 2017, our SG&A ratio was over 29%. And today, it's around 27%. This year, we expect it will further improve from 28% in the first half to 26% in the second half even after growth investments in frontline Firepower, digital technologies and service capabilities. And on a side note, third quarter SG&A also benefited from FX, which we expect will reverse next quarter. With this, we anticipate fourth quarter's SG&A ratio to be flattish versus last year's fourth quarter, while long-term trends will keep improving 20 to 30 basis points per year.
Overall, our operating income grew 22%. NOI margin expanded by 260 basis points to 17.9%, which is very close to a record third quarter margin for Ecolab. For the full year 2024, we expect NOI margin of around 16.5%, 50 basis points better than our early commitment and 260 basis points better than last year. With our strong margin expansion momentum, my confidence in consistently delivering 12% to 15% long-term EPS growth has only strengthened. This will position Ecolab to reach our 20% operating income margin target over the next three years. Now I'd like to transition our attention from Q3 to what our teams are focused on to fuel long-term growth and margin expansion. Our growth engines in clean tech, high tech and biotech are showing strength and momentum, even if each are at the different stage of development. In the clean tech area, institutional and specialty as well as pest elimination are both delivering strong performance, growing 7% and 8%, respectively, with operating income margins north of 20%.
Global High Tech, which includes data center cooling and water for microelectronics is growing at strong double digits. And in biotech, our Life Sciences business remains ahead of the curve in what we believe will be a huge long-term growth opportunity. Our innovation pipeline also continues to build as we shift our focus from renovation to breakthrough innovation. With nearly $1.5 billion, our 2024 pipeline is at record levels and laser-focused on the biggest opportunities across our clean tech, high tech and biotech platforms.
Finally, our One Ecolab growth initiative, which seeks to leverage our digital technologies to deliver best-in-class business outcomes, operational performance and environmental impact that every customer location around the world is progressing very well. Over the next few years, One Ecolab looks to more quickly unlock our current $55 billion penetration opportunity. Our early focus on our largest and fastest-growing certified customers is showing promising results with significant total value delivered for our customers and a great growth opportunity for Ecolab. With strong long-term business momentum, record free cash flow and the proceeds from the sale of the Surgical Drapes business, our balance sheet is in a very healthy position. This provides us with many options to allocate capital to organic and inorganic growth opportunities.
On organic growth, we are well positioned to scale unique customer solutions like our AI dish machine program for QSR and circular water systems for data centers and microelectronic manufacturers. On the acquisition front, we're now in a unique position to enhance our focus on the core fields of water, digital and life sciences to generate strong returns for shareholders.
In closing, I said this every quarter, and I'll say it again today. Ecolab's future has never looked brighter. Our leading customer value proposition where our technologies help customers improve their operating performance while reducing the water and energy usage is increasingly relevant, especially in unpredictable times and continues to fuel our growth and margin expansion.
Simply put, we remain very well positioned to consistently drive 12% to 15% growth in adjusted diluted earnings per share in 2025 and in the years to come. So thanks again for your continued support and naturally your investment in our company. I look forward to your questions.