| City |
Rank |
 Lisbon, Tap Water Safety in Portugal |
1901 |
 Banda Aceh, Tap Water Safety in Indonesia |
1902 |
 Cairns, Tap Water Safety in Australia |
1903 |
 Asheville, Is Tap Water Safe to Drink in North Carolina? |
1904 |
 Acapulco, Tap Water Safety in Mexico |
1905 |
|
Castle Pines Village, Is Tap Water Safe to Drink in Colorado? |
1906 |
|
El Jebel, Is Tap Water Safe to Drink in Colorado? |
1906 |
 Hamilton, Tap Water Safety in New Zealand |
1908 |
 Madrid, Tap Water Safety in Spain |
1909 |
|
Mobile, Is Tap Water Safe to Drink in Alabama? |
1910 |
|
Milwaukee, Is Tap Water Safe to Drink in Wisconsin? |
1910 |
 Caserta, Tap Water Safety in Italy |
1912 |
 Rishikesh, Tap Water Safety in India |
1913 |
 Ramnicu Valcea, Tap Water Safety in Romania |
1914 |
 Siauliai, Tap Water Safety in Lithuania |
1915 |
 Belem, Tap Water Safety in Brazil |
1916 |
|
Wichita, Is Tap Water Safe to Drink in Kansas? |
1917 |
|
Clifton Forge, Is Tap Water Safe to Drink in Virginia? |
1917 |
|
Bluefield, Is Tap Water Safe to Drink in Virginia? |
1917 |
|
Altavista, Is Tap Water Safe to Drink in Virginia? |
1917 |
|
South Hill, Is Tap Water Safe to Drink in Virginia? |
1917 |
 New Glasgow Nova Scotia, Tap Water Safety in Canada |
1922 |
|
Greensboro, Is Tap Water Safe to Drink in North Carolina? |
1923 |
|
Edison Twp., Is Tap Water Safe to Drink in New Jersey? |
1923 |
|
Iowa City, Is Tap Water Safe to Drink in Iowa? |
1923 |
 Bayan Lepas, Tap Water Safety in Malaysia |
1926 |
|
North Westport, Is Tap Water Safe to Drink in Massachusetts? |
1927 |
|
Raynham Center, Is Tap Water Safe to Drink in Massachusetts? |
1927 |
|
Newport, Is Tap Water Safe to Drink in South Carolina? |
1929 |
|
Winnsboro, Is Tap Water Safe to Drink in South Carolina? |
1929 |
|
Bishopville, Is Tap Water Safe to Drink in South Carolina? |
1929 |
|
Manning, Is Tap Water Safe to Drink in South Carolina? |
1929 |
|
Surfside Beach, Is Tap Water Safe to Drink in South Carolina? |
1929 |
|
Tulsa, Is Tap Water Safe to Drink in Oklahoma? |
1934 |
|
Aurora, Is Tap Water Safe to Drink in IllinoIs? |
1935 |
 Herzliya, Tap Water Safety in Israel |
1936 |
 Belfast, Tap Water Safety in the United Kingdom |
1937 |
|
Darwin, Tap Water Safety in Australia |
1938 |
|
Chilliwack, Tap Water Safety in Canada |
1939 |
|
Landrum, Is Tap Water Safe to Drink in South Carolina? |
1940 |
|
Springfield, Is Tap Water Safe to Drink in Missouri? |
1941 |
|
Cadiz, Tap Water Safety in Spain |
1942 |
|
Tucumcari, Is Tap Water Safe to Drink in New Mexico? |
1943 |
 Bratislava, Tap Water Safety in Slovakia |
1944 |
|
Thornton, Is Tap Water Safe to Drink in Colorado? |
1945 |
|
King George, Is Tap Water Safe to Drink in Virginia? |
1946 |
|
Luray, Is Tap Water Safe to Drink in Virginia? |
1946 |
|
Vancouver,, Is Tap Water Safe to Drink in Washington? |
1948 |
![]() Philipsburg, Tap Water Safety in Sint Maarten |
1949 |
 Pula, Tap Water Safety in Croatia |
1950 |
|
Varazdin, Tap Water Safety in Croatia |
1950 |
|
Cambridge, Is Tap Water Safe to Drink in Massachusetts? |
1952 |
|
Monterey, Is Tap Water Safe to Drink in California? |
1953 |
|
Lawrenceville, Is Tap Water Safe to Drink in Georgia? |
1954 |
|
Colorado Springs, Is Tap Water Safe to Drink in Colorado? |
1955 |
|
Farmville, Is Tap Water Safe to Drink in North Carolina? |
1956 |
|
Fremont, Is Tap Water Safe to Drink in Nebraska? |
1957 |
 Mersin, Tap Water Safety in Turkey |
1958 |
|
Udine, Tap Water Safety in Italy |
1959 |
|
Ballarat, Tap Water Safety in Australia |
1960 |
|
Chester, Tap Water Safety in the United Kingdom |
1961 |
|
Chelmsford, Tap Water Safety in the United Kingdom |
1961 |
|
Wigan, Tap Water Safety in the United Kingdom |
1961 |
|
Middlesbrough, Tap Water Safety in the United Kingdom |
1961 |
|
Fresno, Is Tap Water Safe to Drink in California? |
1965 |
|
Ithaca, Is Tap Water Safe to Drink in New York? |
1966 |
 Mainz, Tap Water Safety in Germany |
1967 |
 Hamrun, Tap Water Safety in Malta |
1968 |
 Antananarivo, Tap Water Safety in Madagascar |
1969 |
|
Albany, Is Tap Water Safe to Drink in New York? |
1970 |
|
Dillon, Is Tap Water Safe to Drink in Montana? |
1971 |
|
Bolzano-Bozen, Tap Water Safety in Italy |
1972 |
|
Denver, Is Tap Water Safe to Drink in Colorado? |
1973 |
 Harare, Tap Water Safety in Zimbabwe |
1974 |
 Alabang, Tap Water Safety in the Philippines |
1975 |
|
Midland, Tap Water Safety in Canada |
1976 |
|
Oklahoma City, Is Tap Water Safe to Drink in Oklahoma? |
1977 |
|
Lincoln, Is Tap Water Safe to Drink in North Dakota? |
1977 |
 Antofagasta, Tap Water Safety in Chile |
1979 |
|
Broad Brook, Is Tap Water Safe to Drink in Connecticut? |
1980 |
|
Hazardville, Is Tap Water Safe to Drink in Connecticut? |
1980 |
|
Depok, Tap Water Safety in Indonesia |
1982 |
|
Cold Spring Harbor, Is Tap Water Safe to Drink in New York? |
1983 |
|
Xalapa, Veracruz, Tap Water Safety in Mexico |
1984 |
|
Vancouver, Tap Water Safety in Canada |
1985 |
 Kingston, Tap Water Safety in Jamaica |
1986 |
|
Gold Coast, Tap Water Safety in Australia |
1987 |
|
Suncook, Is Tap Water Safe to Drink in New Hampshire? |
1988 |
|
Saskatoon, Tap Water Safety in Canada |
1989 |
|
Boulder, Is Tap Water Safe to Drink in Colorado? |
1990 |
|
Evansville, Is Tap Water Safe to Drink in Indiana? |
1990 |
|
Springfield, Is Tap Water Safe to Drink in IllinoIs? |
1990 |
 Ostrava, Tap Water Safety in the Czech Republic |
1993 |
|
Tottenham, Tap Water Safety in the United Kingdom |
1994 |
|
Chesterfield, Tap Water Safety in the United Kingdom |
1994 |
|
Adelaide, Tap Water Safety in Australia |
1996 |
|
Clearwater, Is Tap Water Safe to Drink in Florida? |
1997 |
|
Dothan, Is Tap Water Safe to Drink in Alabama? |
1997 |
|
Kokomo, Is Tap Water Safe to Drink in Indiana? |
1997 |
|
Ontario, Is Tap Water Safe to Drink in California? |
1997 |