The Louisiana Department of Health (LDH) has released its annual 2023 Public Water System Grade Report. Grades are based on a calendar year, Jan. 1 through Dec. 31, on a 100- point scale.
A letter grade of A is 100-90, B is 80-89, C is 70-79, D is 60-69, and F is 59 or lower.
LDH determines letter grades based on 7 standards. Those standards are Federal Water Quality; State Water Quality; Financial …