Exhibit 99.1 Energy Recovery Reports its Third Quarter 2025 Financial Results SAN LEANDRO, Calif. - November 5, 2025 – Energy Recovery, Inc. (Nasdaq:ERII) ("Energy Recovery" or the "Company") today announced its financial results for the third quarter and nine months ended September 30, 2025. Third Quarter Highlights In conjunction with these financial results, management has released a letter to shareholders reviewing business and financial updates from the third quarter and discussing our outlook for 2025 ...