Exhibit 99.11 JOINT FILING AGREEMENT The undersigned agree that this Schedule 13D filing herewith relating to securities of WorldWater Corp. is filed jointly on behalf of each of the undersigned pursuant to Rule 13d-1(k). Dated: March 23, 2004Joint Filing Agreement • March 25th, 2004 • Toledano Udi • Services-engineering services
Contract Type FiledMarch 25th, 2004 Company IndustryThe undersigned agree that this Schedule 13D filing herewith relating to securities of WorldWater Corp. is filed jointly on behalf of each of the undersigned pursuant to Rule 13d-1(k).