Tap Water Quality Report
Tap water quality in LAFAYETTE, Louisiana
Tap water in LAFAYETTE, Louisiana receives a grade of C (76/100) from TapWaterSafety.org. It's served by LAFAYETTE UTILITIES WATER SYSTEM. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Arsenic significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in LAFAYETTE's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving LAFAYETTE.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 6.39 ppb, 107x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.411 ppb, 103x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 10.9 ppb, 73x above the EWG health guideline of 0.15 ppb.
EPA compliance record
Official U.S. EPA records for LAFAYETTE UTILITIES WATER SYSTEM (system ID LA1055017) for the last 3 years. Checked 2026-10-07.
Source: U.S. EPA Enforcement and Compliance History Online (ECHO), from the Safe Drinking Water Information System. See EPA's full report.
Recommended filters for LAFAYETTE
Filters matched to the specific contaminants in LAFAYETTE's water supply.
Carbon filter certified for VOCs (NSF/ANSI 53)
$180-$599Activated carbon is effective for disinfection byproducts. Look for NSF/ANSI 53 VOC reduction.
Reverse osmosis certified for arsenic (NSF/ANSI 58)
$429-$599Reverse osmosis certified under NSF/ANSI 58 for arsenic is the most reliable home option.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
All contaminants detected in LAFAYETTE's tap water
Every contaminant identified, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal. Why we show multiple standards →
| Contaminant | Detected | EWG US health-based |
EPA US legal |
EU DWD Europe |
WHO global |
CA PHG strictest US |
Tested sample year |
Status |
|---|---|---|---|---|---|---|---|---|
| Haloacetic acids (HAA9) Disinfection byproduct |
6.39 ppb | 0.06 | — | — | — | — | — | 107× over |
| Arsenic Heavy metal |
0.411 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 103× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
10.9 ppb | 0.15 | 80.0 | 100 | — | — | — | 73× over |
| Bromodichloromethane Disinfection byproduct |
3.18 ppb | 0.06 | — | — | — | — | — | 53× over |
| Dibromoacetic acid Disinfection byproduct |
1.23 ppb | 0.03 | — | — | — | — | — | 41× over |
| Dibromochloromethane Disinfection byproduct |
3.86 ppb | 0.1 | — | — | — | — | — | 39× over |
| Chromium (hexavalent) Heavy metal |
0.615 ppb | 0.02 | — | — | — | — | — | 31× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
3.03 ppb | 0.1 | 60.0 | 60 | — | — | — | 30× over |
| Radium, combined (-226 and -228) Radiological |
0.44 pCi/L | 0.05 | 5.0 | — | — | — | — | 8.8× over |
| Trichloroacetic acid Disinfection byproduct |
0.761 ppb | 0.1 | — | — | — | — | — | 7.6× over |
| Chloroform Disinfection byproduct |
2.38 ppb | 0.4 | — | — | — | — | — | 5.9× over |
| Dichloroacetic acid Disinfection byproduct |
0.994 ppb | 0.2 | — | — | — | — | — | 5.0× over |
| Bromoform Disinfection byproduct |
1.48 ppb | 0.5 | — | — | — | — | — | 3.0× over |
| Manganese Heavy metal |
115.7 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Chlorate Disinfection byproduct |
162.2 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Nitrate and nitrite Inorganic |
0.0538 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | Below guideline |
| Barium Heavy metal |
90.5 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Vanadium Other |
0.68 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Aluminum Heavy metal |
18.9 ppb | 600.0 | — | 200 | — | 600 | — | Below guideline |
| Monobromoacetic acid Disinfection byproduct |
0.0399 ppb | 25.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.288 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.195 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
All values in the unit of the detected level. Red cells indicate the detected level exceeds that standard. Some contaminants have limits in some jurisdictions but not others (shown as —). The "Tested" column shows the year each contaminant sample was collected.
Sources: US EPA, EU Drinking Water Directive 2020/2184, WHO Guidelines, California OEHHA PHGs, EWG Tap Water Database.
Treatment plant contact info
For service issues, water quality concerns, or to request a Consumer Confidence Report from LAFAYETTE UTILITIES WATER SYSTEM.