Water Quality Report · Updated May 12, 2026
LAFAYETTE WATER WORKS
LAFAYETTE WATER WORKS delivers tap water graded B (76/100) by TapWaterSafety.org. The utility serves approximately 70,835 residents in LAFAYETTE, Indiana using groundwater. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline. For questions, the utility can be reached at 765-807-1700.
Is LAFAYETTE tap water safe to drink?
LAFAYETTE WATER WORKS delivers tap water that earns a grade of B (76/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 70,835 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 arsenic significantly above health guideline.
Public testing data identifies 6 contaminants in this water above EWG's health-based guidelines, including: Arsenic, Haloacetic acids (HAA9), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Nitrate, 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 WATER WORKS.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.55 ppb, 138x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 4.04 ppb, 67x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 3.85 ppb, 39x above the EWG health guideline of 0.1 ppb.
Contact LAFAYETTE WATER WORKS
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.
Reverse Osmosis
$249-$750Arsenic is most effectively removed by reverse osmosis. Some specialized adsorptive filters also work.
Carbon block (NSF/ANSI 42 + 53)
$40-$750Activated carbon is highly effective for disinfection byproducts like TTHM and HAA5.
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 76/100 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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
0.55 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 138× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
4.04 ppb | 0.06 | — | — | — | — | — | 67× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
3.85 ppb | 0.1 | 60.0 | 60 | — | — | — | 39× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
2.98 ppb | 0.15 | 80.0 | 100 | — | — | — | 20× over |
| Nitrate Inorganic |
0.706 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 5.0× over |
| Manganese Heavy metal |
252.3 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Chlorate Disinfection byproduct |
155.0 ppb | 210.0 | — | — | — | — | — | Below guideline |
| Trichloroethylene Volatile organic compound |
0.248 ppb | 0.4 | 5.0 | 10 | 20 | 1.7 | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.183 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Barium Heavy metal |
133.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
4.15 ppb | 40.0 | — | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.12 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.254 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| 1,1,1-Trichloroethane Other |
0.237 ppb | — | 200.0 | — | — | — | — | Below guideline |
| Chlorodifluoromethane Other |
0.025 ppb | — | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.276 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Lithium Other |
10.8 ppb | — | — | — | — | — | — | 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 WATER WORKS service area
This water system serves 1 community in Tippecanoe County, Indiana. 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.