Jon Vander Ark
President and Chief Executive Officer at Republic Services
Thanks Aaron. Good afternoon, everyone and thank you for joining us. Our strong third quarter results reflect our focus on profitably growing the business. We produced revenue growth both organically and through acquisitions, while generating healthy margin expansion across our business. During the quarter, we delivered revenue growth of 6%, including 2% from acquisitions, generated adjusted EBITDA growth of 9% and expanded EBITDA margin by 70 basis points, report adjusted earnings per share of $1.54 and produced $1.8 billion of adjusted free cash flow on a year-to-date basis.
We continue to effectively allocate capital by investing in acquisitions to create long-term value. Year-to-date, we have invested $947 million in acquisitions. All transactions were in the recycling and waste space. The M&A environment remains active with opportunities in both the recycling and waste and Environmental Solutions businesses. We remain confident that we will exceed $1 billion of investment for the year.
Year-to-date, we returned $671 million to shareholders through dividends and share repurchases. This includes $201 million of share repurchases completed during the third quarter as our leverage ratio returned to target levels. We continue to make progress, demonstrating the value of our complete set of products and offerings to customers while increasing the profitability of our Environmental Solutions business. Pricing realization in the Environmental Solutions business remains strong, and we continue to drive organic growth through cross-selling.
EBITDA margin in the Environmental Solutions business improved sequentially to 22.7% in the third quarter and expanded 390 basis points over the prior year. The results we are delivering are made possible by executing our strategy in support of our differentiated capabilities. Regarding customer zeal, our efforts to deliver industry-leading service continues to drive sustained customer loyalty and organic growth in the business.
Our customer retention rate remained over 94% and we continue to see favorable trends in our Net Promoter Score, supported by our valuable service offerings and quality service delivery. Organic revenue growth remained strong during the quarter, with simultaneous increases in both price and volume. Core price and related revenue was 8.6% and average yield on related revenue was 7.2%, and organic volume growth and related revenue was 10 basis points.
Turning to our digital capabilities. The team continues to advance the implementation of digital tools that improve the experience for both customers and employees. The next phase of our digital operations is expected to drive additional productivity savings through route optimization, further improved safety performance, and provide more predictable service delivery to our customers. For example, we now have the ability to provide real-time customer notifications regarding expected service time on a given day. We are in the early stages of deploying advanced contamination over time and drive incremental revenue. Platform utilizes cameras to identify contamination in recycling containers. We expect this technology will reduce contamination overtime and drive incremental revenue.
Moving on to sustainability. We believe that our sustainability innovation investments in areas such as plastic circularity and renewable natural gas or a platform for profitable growth. Development of our polymer centers remains on track. Construction of our Las Vegas Polymer Center is substantially complete, and we expect full scale operations to begin in November. Our Midwest Polymer center will be located in Indianapolis. This center will be co-located with a Blue Polymers production facility with operations expected to begin in late 2024.
The renewable natural gas projects being codeveloped with our partners are continuing to advance. I-projects [Phonetic] were online by the end of the third quarter, and we expect eight additional projects to be completed in 2024. We are making progress in our efforts to reduce greenhouse gas emissions, including our industry-leading commitment to fleet electrification. We expect to have 12 electric vehicles in operation by year-end and more than 60 EVs to be added to our recycling and waste collection fleet in 2024. We now have six facilities with commercial EV charging infrastructure with more than 40 additional sites in various stages of development.
We continue to be recognized as an employer of choice and are proud to be certified as a Great Place To Work for the seventh consecutive year. Our team members remain highly engaged to ensure that we are delivering high-quality essential services that are valued by our customers.
I now turn the call over to Brian, who'll provide more details for the quarter.