Water Quality Report · Updated May 12, 2026
LAFAYETTE UTILITIES WATER SYSTEM
LAFAYETTE UTILITIES WATER SYSTEM delivers tap water graded C (68/100) by TapWaterSafety.org. The utility serves approximately 169,389 residents in LAFAYETTE, Louisiana using groundwater. 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. For questions, the utility can be reached at 337-291-5901.
Is LAFAYETTE tap water safe to drink?
LAFAYETTE UTILITIES WATER SYSTEM delivers tap water that earns a grade of C (68/100) from TapWaterSafety.org — an average rating, with several contaminants above health guidelines but generally compliant with US legal limits.
The utility serves 169,389 residents in LAFAYETTE, drawing from groundwater. Despite being legal under US EPA standards, this water would fail the European Union's Drinking Water Directive, primarily due to haloacetic acids (haa9) significantly above health guideline.
Public testing data identifies 14 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Arsenic, Total trihalomethanes (TTHMs), Bromodichloromethane, Dibromoacetic acid, Dibromochloromethane, Chromium (hexavalent), Haloacetic acids (HAA5), Radium, combined (-226 and -228), Trichloroacetic acid, Chloroform, Dichloroacetic acid, Bromoform, Manganese. For most residents, a properly certified home filter at the kitchen tap is the most cost-effective way to reduce exposure to whatever's in your water. See our filter recommendations below, matched specifically to this utility's contaminant profile.
Quick actions for LAFAYETTE residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for LAFAYETTE UTILITIES WATER SYSTEM.
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.
Contact LAFAYETTE UTILITIES WATER SYSTEM
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
Treatment Plant
Recommended water filters for LAFAYETTE
Filters matched to the specific contaminants in this water supply.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Disclosure: TapWaterSafety earns a commission from purchases made through these links. This does not influence our scoring methodology or filter selection.
Score breakdown
This utility's overall score of 68/100 breaks down across five weighted components. Read the full methodology →
Contaminants detected — international standards comparison
Every contaminant detected, compared side-by-side against US EPA legal limits, the EU Drinking Water Directive (2020/2184), WHO Guidelines, and California's Public Health Goal (the strictest US benchmark). 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 (4th ed.), California OEHHA PHGs, EWG Tap Water Database.
LAFAYETTE UTILITIES WATER SYSTEM service area
This water system serves 1 community in Lafayette Parish County, Louisiana. Click any city for its dedicated tap water quality page.
Find the right filter for LAFAYETTE water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.