system to drain into local rivers. Nine billion gallons of untreated waste and stormwater flow into rivers, leading to health hazards and Clean Water Act violations. The local sewage authority, Allegheny County Sanitary Authority, or ALCOSAN, is operating under Consent Decree from the EPA to come up with solutions. In 2017, ALCOSAN proposed a $2 billion upgrade to the system which is moving closer to EPA approval. Pittsburgh Water and Sewer Authority (PWSA) is the city's agency required to replace pipes and charge water rates. They have come under fire from both city and state authorities due to alleged mismanagement. In 2017, Mayor William Peduto advocated for a restructuring of the PWSA and a partially privatized water authority. Governor Wolf subsequently assigned the PWSA to be under the oversight of the Public Utilities Commission (PUC). Demographics At the 2010 census, there were 305,704 people residing in Pittsburgh, a decrease of 8.6% since 2000; 66.0% of the population was White, 25.8% Black or African American, 0.2% American Indian and Alaska Native, 4.4% Asian, 0.3% Other, and 2.3% mixed; in 2020, 2.3% of Pittsburgh's population was of Hispanic or Latino American origin of any race. Non-Hispanic whites were 64.8% of the population in 2010, compared to 78.7% in 1970. By the 2020 census, the population slightly declined further to 302,971. Its racial and ethnic makeup in 2020 was 64.7% non-Hispanic white, 23.0% Black or African American, 5.8% Asian, and 3.2% Hispanic or Latino American of any race. Since the beginning of the 21st century, the five largest European ethnic groups in the city were German (19.7%), Irish (15.8%), Italian (11.8%), Polish (8.4%), and English (4.6%), while the metropolitan area is approximately 22% German-American, 15.4% Italian American and 11.6% Irish American. Pittsburgh has one of the largest Italian-American communities in the nation, and the fifth-largest Ukrainian community per the 1990 census. Pittsburgh has one of the most extensive Croatian communities in the United States. Overall, the Pittsburgh metro area has one of the largest populations of Slavic Americans in the country. Pittsburgh has a sizable Black and African American population, concentrated in various neighborhoods especially in the East End. There is also a small Asian community consisting of Indian immigrants, and a small Hispanic community consisting of Mexicans and Puerto Ricans. According to a 2010 Association of Religion Data Archives (ARDA) study, residents include 773,341 "Catholics"; 326,125 "Mainline Protestants"; 174,119 "Evangelical Protestants;" 20,976