SAN FRANCISCO--(BUSINESS WIRE)--Fitch Ratings has affirmed the 'AA+' rating on the following Helix Water District, California (the district) outstanding obligations: --$13.9 million outstanding water revenue refunding bonds series 2009. The Rating Outlook is Stable. SECURITY The bonds are secured by a first pledge of net revenues from the district's water system. In addition, the bonds are secured by a pledge of all moneys (including earned interest) in the bond service fund and reserve fund. K