Standard&Poor's Ratings Services assigned its 'AA' rating to the Sacramento County Sanitation Districts Financing Authority, Calif.'s $78 million series 2011A revenue refunding bonds. The bonds are being issued on behalf of, and payable from the revenues of, the Sacramento Regional County Sanitation District. In addition, we affirmed our 'AA' long-term rating and underlying rating (SPUR) on the district's existing senior-lien obligations and our 'AA-' long-term rating and SPUR on the district's existing subordinate-lien obligations. The outlook is stable. The ratings on the senior- and subordinate-lien obligations reflect our view of the district's: Large, primarily wholesale service area encompassing the populated areas of Sacramento County; Demonstrated willingness to adjust rates, with the board adopting three years of rate increases