0 systems serving 3,153,982 people
  This drinking water quality report shows results of tests conducted by water utilities in Louisiana, provided to the Environmental Working Group (EWG) by the Louisiana Department of Health and Hospitals. It is part of EWG's national database that includes 47,667 drinking water utilities and 20 million test results from 45 states and the District of Columbia. Water utilities nationwide detected more than 300 pollutants between 2004 and 2009. More than half of these chemicals are unregulated, legal in any amount. Despite this widespread contamination, the federal government invests few resources in protecting rivers, reservoirs, and groundwater from pollution in the first place. The information below summarizes drinking water quality for this state.

The state water agency did not respond to requests for water quality test data. Contact your water utility for the latest water quality report.
  Violation Summary for Louisiana

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Louisiana since 2004.

Violation Type Number of Violations
Over maximum contaminant level, Average 911
Failure to report information to the public or state agency in the Consumer Confidence Report 637
Monitoring and Reporting Disinfection Byproduct Rule 555
Maximum contaminant level, Monthly (Coliform bacteria) 491
Follow-up and Routine Tap Sampling 195
Treatment Technique Precursor Removal 64
Failure to monitor or report, Routine/Repeat (Indicators of microbial or virus contamination) 61
Failure to monitor, Routine Major (Coliform bacteria) 61
Failure to monitor, Routine Minor (Coliform bacteria) 45
Filter Turbidity Reporting 41
Failure to monitor, Repeat Major (Coliform bacteria) 27
Initial Tap Sampling for Lead and Copper 17
Maximum contaminant level, Acute (Coliform bacteria) 7
Failure to monitor, Repeat Minor (Coliform bacteria) 7
Improper Treatment Techniques 5
Excess Turbidity at 0.3 NTU 4
Failure to notify public of violation 4
Failure to notify state agency 2
Excess Turbidity at 1 NTU 2
Treatment Technique No Certif. Operator 2
Treatment Technique (Surface Water Treatment Rule) 2

Sources : EWG (Environmental Working Group)