S&P Global Ratings assigned its 'AA' rating to Metropolitan District Hartford County (MDC), Conn.'s $86.2 million general obligation (GO) bonds, issue of 2022, series A. At the same time, S&P Global Ratings raised its rating on MDC's outstanding clean water project (CWP) revenue and revenue refunding bonds to 'AA' from 'AA-' and affirmed its 'AA' rating on MDC's outstanding GO bonds. The raised rating on the CWP bonds reflects our view that all of MDC's debt benefits from management's ability to finance its operations from diverse revenue stream that includes ad valorem taxes, providing additional support in our analysis given the relative stability of those revenues. With these rating actions, none of our ratings are under criteria observation any longer.