City Water Quality Rankings in Louisiana
264 cities ranked by drinking water quality.
Popular city water quality comparisons
Trending Cities
#97
Washington
County, LA
86 B
#98 Zachary
County, LA
86 B
#99 Angie
County, LA
85 B
#100 Basile
County, LA
85 B
#101 Deridder
County, LA
85 B
#102 New Roads
County, LA
85 B
#103 Rayne
County, LA
85 B
#104 Slaughter
County, LA
85 B
#105 Folsom
County, LA
84 B
#106 Kilbourne
County, LA
84 B
#107 Lawtell
County, LA
84 B
#108 Rosepine
County, LA
83 B
#109 Westwego
County, LA
83 B
#110 Athens
County, LA
82 B
#111 Baker
County, LA
82 B
#112 Elmer
County, LA
82 B
#113 Lake Charles
County, LA
82 B
#114 Marksville
County, LA
82 B
#115 Plaquemine
County, LA
82 B
#116 Breaux Bridge
County, LA
81 B
#117 Calhoun
County, LA
81 B
#118 Covington
County, LA
81 B
#119 Jennings
County, LA
81 B
#120 Olla
County, LA
81 B
Frequently Asked Questions
How are city water quality rankings calculated in Louisiana?
WaterQ city rankings are based on EPA SDWIS data across local public water systems, including contaminant detections, compliance violations, and recency-weighted score signals.
Can I compare two cities in Louisiana?
Yes. Use the city comparison links on this page or open the Compare tool to evaluate two cities side by side on score, grade, and water system coverage.
How often does WaterQ refresh city data?
City-level metrics refresh when new EPA data is processed. Check city pages for latest score and violation context.