Water Quality Report · Updated October 07, 2026
CITIZENS WATER - INDIANAPOLIS
CITIZENS WATER - INDIANAPOLIS delivers tap water graded B (75/100) by TapWaterSafety.org. The utility serves approximately 880,345 residents in INDIANAPOLIS, Indiana using surface water. The most significant water quality concerns are: Haloacetic acids (HAA9) significantly above health guideline; Haloacetic acids (HAA5) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline; Arsenic detected. For questions, the utility can be reached at 317-429-3569.
Is INDIANAPOLIS tap water safe to drink?
CITIZENS WATER - INDIANAPOLIS delivers tap water that earns a grade of B (75/100) from TapWaterSafety.org — a good rating, with only minor concerns relative to health-based guidelines.
The utility serves 880,345 residents in INDIANAPOLIS, 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 13 contaminants in this water above EWG's health-based guidelines, including: Haloacetic acids (HAA9), Haloacetic acids (HAA5), Total trihalomethanes (TTHMs), Bromodichloromethane, Chloroform, Dibromochloromethane, Radium, combined (-226 and -228), Arsenic, Nitrate, Nitrate and nitrite, Chromium (hexavalent), Chlorate, 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.
EPA compliance record
Official U.S. EPA records for CITIZENS WATER - INDIANAPOLIS (system ID IN5249004) 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.
Quick actions for INDIANAPOLIS residents
Top concerns in this water
Based on the most recent EPA and EWG data, these are the most significant water quality issues for CITIZENS WATER - INDIANAPOLIS.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 33.3 ppb, 555x above the EWG health guideline of 0.06 ppb.
Haloacetic acids (HAA5) significantly above health guideline
Moderate concernHaloacetic acids (HAA5) detected at 38.6 ppb, 386x above the EWG health guideline of 0.1 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 51.7 ppb, 345x above the EWG health guideline of 0.15 ppb.
Arsenic detected
Moderate concernArsenic detected at 0.0358 ppb.
Contact CITIZENS WATER - INDIANAPOLIS
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 INDIANAPOLIS
Filters matched to the specific contaminants in this 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.
Score breakdown
This utility's overall score of 75/100 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 |
33.3 ppb | 0.06 | — | — | — | — | — | 555× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
38.6 ppb | 0.1 | 60.0 | 60 | — | — | — | 386× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
51.7 ppb | 0.15 | 80.0 | 100 | — | — | — | 345× over |
| Bromodichloromethane Disinfection byproduct |
8.1 ppb | 0.06 | — | — | — | — | — | 135× over |
| Chloroform Disinfection byproduct |
18.0 ppb | 0.4 | — | — | — | — | — | 45× over |
| Dibromochloromethane Disinfection byproduct |
2.7 ppb | 0.1 | — | — | — | — | — | 27× over |
| Radium, combined (-226 and -228) Radiological |
0.63 pCi/L | 0.05 | 5.0 | — | — | — | — | 13× over |
| Arsenic Heavy metal |
0.0358 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 8.9× over |
| Nitrate Inorganic |
0.627 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.5× over |
| Nitrate and nitrite Inorganic |
0.627 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 4.5× over |
| Chromium (hexavalent) Heavy metal |
0.08 ppb | 0.02 | — | — | — | — | — | 4.0× over |
| Chlorate Disinfection byproduct |
492.9 ppb | 210.0 | — | — | — | — | — | 2.3× over |
| Atrazine Pesticide/Herbicide |
0.193 ppb | 0.1 | 3.0 | 0.1 | 100 | 0.15 | — | Fails EU |
| 1,4-Dioxane Semi-volatile organic compound |
0.0738 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Bromoform Disinfection byproduct |
0.095 ppb | 0.5 | — | — | — | — | — | Below guideline |
| Barium Heavy metal |
129.9 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Simazine Pesticide/Herbicide |
0.0162 ppb | 0.1 | 4.0 | — | — | — | — | Below guideline |
| Molybdenum Other |
3.92 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Vanadium Other |
0.422 ppb | 21.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
0.495 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
2.31 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
1.48 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorobutanoic Acid (PFBA) PFAS |
0.412 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| 1,2,4-Trichlorobenzene Volatile organic compound |
0.00115 ppb | 5.0 | 70.0 | 1 | 10 | 0.15 | — | Below guideline |
| Perfluorobutane sulfonate (PFBS) PFAS |
0.419 ppt | 2000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.227 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Xylenes (total) Volatile organic compound |
0.00258 ppb | 1800.0 | 10000.0 | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.689 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.
CITIZENS WATER - INDIANAPOLIS service area
This water system serves 1 community in Marion County, Indiana. Click any city for its dedicated tap water quality page.
Find the right filter for INDIANAPOLIS water
Browse filter categories by water-quality concern. Each option below is NSF-certified for the matched contaminant type.