Tap Water Quality Report
Tap water quality in GREENWOOD, Indiana
Tap water in GREENWOOD, Indiana receives a grade of C (72/100) from TapWaterSafety.org. It's served by INDIANA AMERICAN WATER - JOHNSON COUNTY. The most significant water quality concerns are: Arsenic significantly above health guideline; Haloacetic acids (HAA9) significantly above health guideline; Total trihalomethanes (TTHMs) significantly above health guideline. Data sources: EPA SDWIS, EPA ECHO, EWG Tap Water Database.
What's in GREENWOOD's tap water
Top water quality concerns identified by the EPA and Environmental Working Group across the utility serving GREENWOOD.
Arsenic significantly above health guideline
Moderate concernArsenic detected at 0.667 ppb, 167x above the EWG health guideline of 0.004 ppb.
Haloacetic acids (HAA9) significantly above health guideline
Moderate concernHaloacetic acids (HAA9) detected at 9.67 ppb, 161x above the EWG health guideline of 0.06 ppb.
Total trihalomethanes (TTHMs) significantly above health guideline
Moderate concernTotal trihalomethanes (TTHMs) detected at 15.8 ppb, 105x above the EWG health guideline of 0.15 ppb.
Recommended filters for GREENWOOD
Filters matched to the specific contaminants in GREENWOOD's 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.
All contaminants detected in GREENWOOD'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 |
|---|---|---|---|---|---|---|---|---|
| Arsenic Heavy metal |
0.667 ppb | 0.004 | 10.0 | 10 | 10 | 0.004 | — | 167× over |
| Haloacetic acids (HAA9) Disinfection byproduct |
9.67 ppb | 0.06 | — | — | — | — | — | 161× over |
| Total trihalomethanes (TTHMs) Disinfection byproduct |
15.8 ppb | 0.15 | 80.0 | 100 | — | — | — | 105× over |
| Haloacetic acids (HAA5) Disinfection byproduct |
6.77 ppb | 0.1 | 60.0 | 60 | — | — | — | 68× over |
| Radium, combined (-226 and -228) Radiological |
0.86 pCi/L | 0.05 | 5.0 | — | — | — | — | 17× over |
| Nitrate Inorganic |
0.156 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.1× over |
| Nitrate and nitrite Inorganic |
0.156 ppm | 0.14 | 10.0 | 11.3 | 11.3 | 10 | — | 1.1× over |
| Chlorate Disinfection byproduct |
210.8 ppb | 210.0 | — | — | — | — | — | 1.0× over |
| Barium Heavy metal |
266.7 ppb | 700.0 | 2000.0 | — | 1300 | 2000 | — | Below guideline |
| Molybdenum Other |
8.76 ppb | 40.0 | — | — | — | — | — | Below guideline |
| Manganese Heavy metal |
16.4 ppb | 100.0 | — | 50 | 80 | — | — | Below guideline |
| 1,4-Dioxane Semi-volatile organic compound |
0.0567 ppb | 0.35 | — | — | 50 | 1 | — | Below guideline |
| Perfluoropentanoic Acid (PFPeA) PFAS |
1.55 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Perfluorohexanoic Acid (PFHxA) PFAS |
1.4 ppt | 1000.0 | — | — | — | — | — | Below guideline |
| Strontium Radiological |
0.675 ppb | 1500.0 | — | — | — | — | — | Below guideline |
| Fluoride Inorganic |
0.557 ppm | — | 4.0 | 1.5 | 1.5 | — | — | Below guideline |
| Germanium Other |
0.118 ppb | — | — | — | — | — | — | Below guideline |
| Lithium Other |
3.18 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, 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 INDIANA AMERICAN WATER - JOHNSON COUNTY.