Water Quality Report · Updated May 12, 2026
INDIANA AMERICAN WATER - KOKOMO
INDIANA AMERICAN WATER - KOKOMO delivers tap water graded D (60/100) by TapWaterSafety.org. The utility serves approximately 59,313 residents in KOKOMO, Indiana using surface water. 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 317-885-2408.
Is KOKOMO tap water safe to drink?
INDIANA AMERICAN WATER - KOKOMO delivers tap water that earns a grade of D (60/100) from TapWaterSafety.org — a below-average rating, with multiple concerns including haloacetic acids (haa9) significantly above health guideline.
The utility serves 59,313 residents in KOKOMO, drawing from surface water. 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 10 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Arsenic, Total trihalomethanes (TTHMs), Haloacetic acids (HAA5), Radium, combined (-226 and -228), Nitrate, Nitrate and nitrite, Chromium (hexavalent), Manganese, Atrazine. 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 KOKOMO residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for INDIANA AMERICAN WATER - KOKOMO.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 22.6 ppb, 377x above the EWG health guideline of 0.06 ppb.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 1.25 ppb, 313x above the EWG health guideline of 0.004 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 45.5 ppb, 303x above the EWG health guideline of 0.15 ppb.
Contact INDIANA AMERICAN WATER - KOKOMO
Reach the utility directly for service issues, water quality concerns, or to request your Consumer Confidence Report.
General Contact
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Recommended water filters for KOKOMO
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 60/100 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 |
22.6 ppb | 0.06 | — | — | — | — | — | 377× over |
| Arsenic Heavy metal |
1.25 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 313× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
45.5 ppb | 0.15 | 80.0 | 100 | — | — | — | 303× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
14.7 ppb | 0.1 | 60.0 | 60 | — | — | — | 147× over |
| Radium, combined (-226 and -228) Radiological |
1.54 pCi/L | 0.05 | 5.0 | — | — | — | — | 31× over |
| Nitrate Inorganic |
1.65 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 12× over |
| Nitrate and nitrite Inorganic |
1.65 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 12× over |
| Chromium (hexavalent) Heavy metal |
0.191 ppb | 0.02 | — | — | — | — | — | 9.5× over |
| Manganese Heavy metal |
128.2 ppb | 100.0 | — | 50 | 80 | — | — | Fails EU |
| Atrazine Pesticide/Herbicide |
0.113 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| Chlorate Disinfection byproduct |
91.4 ppb | 210.0 | — | — | — | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.105 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Molybdenum Other |
5.19 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
50.0 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| 2,4-D Pesticide/Herbicide |
0.09 ppb | 20.0 | 70.0 | — | — | — | — | Below guideline |
| 1,1-Dichloroethane Volatile organic compound |
0.0117 ppb | 3.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.313 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| cis-1,2-Dichloroethylene Volatile organic compound |
0.7 ppb | — | 70.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.53 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.134 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.
INDIANA AMERICAN WATER - KOKOMO service area
This water system serves 1 community in Howard County, Indiana. Click any city for its dedicated tap water quality page.
Find the right filter for KOKOMO water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.