Stonybrook Purification, a company that has developed a new way to filter water, has raised $4.1 million in a first round of venture financing.

The Sony Brook, New York company was launched earlier this year as a spin-out from Stony Brook University. Based on research by university professors Ben Chu and Ben Hsiao, the company’s founders, it seeks to improve the flow of liquid across the filter’s membrane.

Investors include seed investors Battery Ventures and T2 Venture Capital, and new investors Modern Water and TianDi Growth Capital.

It’s just the latest investment in a string of companies attempting to make water filtration more efficient.

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