Public water system · IN2100018
ActiveCharlestown/River Ridge
At a glance
Charlestown/River Ridge (PWSID IN2100018) is an active non-transient non-community water system in Clark County, Indiana. It reports serving 10,500 people through 169 service connections. Its primary water source is groundwater, and EPA lists it as owned by a state government. EPA's records list 2 violations for this system; none is health-based, and the most recent began in May 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
10,500
Service connections
169
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Charlestown/River Ridge compare with other water systems in Clark County?
By EPA's size categories, Charlestown/River Ridge is a large system (10,001 to 100,000 people). Clark County has 11 active public water systems, and Charlestown/River Ridge is the 5th-largest of them by population served. Its population served is about 38% below the county average of 16,950 people per system, and accounts for 5.6% of the 186,451 people reported by systems filed under the county. Across Indiana, the 3,969 active systems average 1,456 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Charlestown/River Ridge is about 24 times that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Indiana has 603 active non-transient non-community water systems, 15% 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 Charlestown/River Ridge?
EPA lists Charlestown/River Ridge as owned by a state government. 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. 1 of the 11 active systems in Clark County (9.1%) are also owned by a state government.
Does Charlestown/River Ridge have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in May 2018. The violations listed here began between January 2011 and May 2018. By type: 1 reporting and 1 monitoring and reporting. The contaminants or rules involved are Revised Total Coliform Rule and Nitrate. EPA lists 1 as resolved and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. 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 |
|---|---|---|---|---|
| 2018-05-01 | ReportingReport Sample Result/Fail Monitor (RTCR) · code 4B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
All 2 violations in EPA's records, newest first.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.
Charlestown/River Ridge: frequently asked questions
Who runs Charlestown/River Ridge?
Charlestown/River Ridge (PWSID IN2100018) is a non-transient non-community water system owned by a state government. It is regulated by the IN state drinking water program.
How many people does Charlestown/River Ridge serve?
Charlestown/River Ridge reports serving 10,500 people through 169 service connections in Clark County, Indiana.
Where does Charlestown/River Ridge 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 Charlestown/River Ridge have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in May 2018. 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 Charlestown/River Ridge'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 2 violations for this system; none is health-based, and the most recent began in May 2018. For current results, consult EPA ECHO, or the IN state drinking water program.
Where can I find Charlestown/River Ridge's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Charlestown/River Ridge is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Clark County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Indiana American Water - S. Indiana | Clark | 104,445 | Community | Groundwater |
| Watson Rural Water Company | Clark | 15,750 | Community | Groundwater |
| Sellersburg Water Department | Clark | 15,655 | Community | Groundwater |
| Borden Tri-County Region | Clark | 11,000 | Community | Surface water |
| Indiana American Water - Charlestown | Clark | 8,658 | Community | Groundwater |
| Rural Membership Water Corp. of Clark Co | Clark | 8,630 | Community | Purchased 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, “Charlestown/River Ridge, PWSID IN2100018, Indiana”, https://aquacensus.com/water-systems/indiana/charlestown-river-ridge-in2100018 (data as of October 1, 2026).