Water Quality: Laplace, LA
4 water systems • 46,679 people served
Multiple Health ViolationsWater Quality Summary
Laplace is served by 4 public water systems with a combined service population of 46,679 people, and has 85 EPA Safe Drinking Water Act violations on record. Critically, 49 of those are health-based violations, meaning one or more contaminants were detected above EPA-established safe levels — a serious public health concern. Laplace's violation count is 12% below the national average for Louisiana. Contaminants associated with violations include Bromate, E. coli, Fecal Coliform, TTHM, Total Haloacetic Acids (HAA5).
Contaminants Found
Probable human carcinogen that increases the risk of kidney and thyroid cancers.
Common source: Ozonation of bromide-containing water; used as flour improver
EPA limit: 0.010 mg/L (10 ppb)
Causes gastrointestinal illness; certain strains (e.g., O157:H7) can cause severe kidney failure and death.
Common source: Fecal contamination from humans or animals entering the water supply
EPA limit: Zero (no E. coli permitted in drinking water)
Indicates direct fecal contamination; associated with diarrhea, cramps, nausea, and potential severe illness.
Common source: Human and animal fecal waste
EPA limit: Zero tolerance (any positive triggers violations)
Total trihalomethanes are linked to increased risk of bladder cancer and adverse reproductive outcomes.
Common source: Reaction of chlorine disinfectants with naturally occurring organic matter in water
EPA limit: 0.080 mg/L (80 ppb)
Haloacetic acids are associated with increased cancer risk and potential reproductive and developmental effects.
Common source: Reaction of chlorine disinfectants with organic matter in treated water
EPA limit: 0.060 mg/L (60 ppb)
Water Systems Serving Laplace
| System Name | PWSID | Source | Population | Violations |
|---|---|---|---|---|
| ST JOHN WATER DISTRICT 3 | LA1095007 | Groundwater | 31,965 | 4 |
| ST JOHN WATER DISTRICT 1 | LA1095003 | Surface Water | 10,484 | 19 |
| ST JOHN WATER DISTRICT 2 | LA1095002 | Surface Water | 3,702 | 14 |
| PLEASURE BEND WATER SUPPLY | LA1095006 | Groundwater | 528 | 48 |
Concerned About Your Water?
A home water filter can remove common contaminants. NSF-certified filters are tested against EPA standards.
Consider a reverse osmosis system for comprehensive filtration or a carbon filter for basic improvement.
Other Cities in Louisiana
Data Sources
Drinking water violation data from the EPA Safe Drinking Water Information System (SDWIS). Data includes all recorded violations for active community water systems.