Public water system · IN5241005
ActiveIndiana American Water - Johnson County
At a glance
Indiana American Water - Johnson County (PWSID IN5241005) is an active community water system in Johnson County, Indiana. It reports serving 86,813 people through 34,725 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1980.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
86,813
Service connections
34,725
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Indiana American Water - Johnson County compare with other water systems in Johnson County?
By EPA's size categories, Indiana American Water - Johnson County is a large system (10,001 to 100,000 people). Johnson County has 33 active public water systems, and Indiana American Water - Johnson County is the largest of them by population served. Its population served is about 19 times the county average of 4,692 people per system, and accounts for 56% of the 154,825 people reported by systems filed under the county. Across Indiana, the 3,969 active systems average 1,456 people each. Nationally, the average active community water system reports serving 6,703 people, so Indiana American Water - Johnson County is about 13 times that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Indiana has 770 active community water systems, 19% of the state's 3,969 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 3,769 Indiana systems (95%) list groundwater as their primary source.
Who owns and regulates Indiana American Water - Johnson County?
EPA lists Indiana American Water - Johnson County as privately owned. The IN state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 26 of the 33 active systems in Johnson County (79%) are also privately owned.
Does Indiana American Water - Johnson County have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1980. By type: 1 monitoring and reporting. The contaminant or rule involved is Gross alpha (excluding radon and uranium). EPA lists 1 as archived. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 1980-06-30 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
The one violation in EPA's records.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Indiana American Water - Johnson County: frequently asked questions
Who runs Indiana American Water - Johnson County?
Indiana American Water - Johnson County (PWSID IN5241005) is a community water system privately owned. It is regulated by the IN state drinking water program.
How many people does Indiana American Water - Johnson County serve?
Indiana American Water - Johnson County reports serving 86,813 people through 34,725 service connections in Johnson County, Indiana.
Where does Indiana American Water - Johnson County get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Indiana American Water - Johnson County have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1980. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Indiana American Water - Johnson County's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list one violation for this system; it is not health-based, and the most recent began in June 1980. For current results, consult the system's annual water quality report, EPA ECHO, or the IN state drinking water program.
Where can I find Indiana American Water - Johnson County's water quality report?
As a community water system, Indiana American Water - Johnson County must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Johnson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Bargersville Water Department | Johnson | 34,418 | Community | Groundwater |
| Whiteland Water Works | Johnson | 5,955 | Community | Purchased groundwater |
| Camp Atterbury | Johnson | 5,300 | Community | Purchased groundwater |
| South Park Business Center | Johnson | 5,167 | Non-transient non-community | Purchased groundwater |
| Edinburgh Water Utility | Johnson | 4,480 | Community | Groundwater |
| Princes Lake Water Department | Johnson | 4,095 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Indiana American Water - Johnson County, PWSID IN5241005, Indiana”, https://aquacensus.com/water-systems/indiana/indiana-american-water-johnson-county-in5241005 (data as of October 1, 2026).