BOSTON (S&P Global Ratings) Oct. 8, 2021--S&P Global Ratings assigned its 'AA-' rating to Metropolitan District Hartford County (MDC), Conn.'s clean water project (CWP) $79.5 million series 2021A tax-exempt revenue bonds, and $135.8 million series 2021B taxable revenue refunding bonds. At the same time, S&P Global Ratings affirmed its 'AA-' long-term rating on the CWP's revenue bonds outstanding. The outlook is stable. Overall, we believe management mitigates most environmental and social factors by adopting, adhering to, and adjusting its operating and financial policies and procedures. Treatment capacity and water supply are adequate for current demand and for multiple years of growth. The water pollution control plant is along the Connecticut River, and the district has been improving nitrogen-removal capacity to