Public water system · KS2113903
ActiveMelvern Res Arrow Rock
At a glance
Melvern Res Arrow Rock (PWSID KS2113903) is an active transient non-community water system in Osage County, Kansas. It reports serving 25 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
SWP
Purchased surface water
System type
TNCWS
Transient non-community water system
System record
How does Melvern Res Arrow Rock compare with other water systems in Osage County?
By EPA's size categories, Melvern Res Arrow Rock is a very small system (500 people or fewer). Osage County has 17 active public water systems. Its population served is well below the county average of 1,073 people per system, and accounts for 0.1% of the 18,239 people reported by systems filed under the county. Across Kansas, the 1,041 active systems average 2,800 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Melvern Res Arrow Rock is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Kansas has 138 active transient non-community water systems, 13% of the state's 1,041 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 278 Kansas systems (27%) list purchased surface water as their primary source.
Who owns and regulates Melvern Res Arrow Rock?
EPA lists Melvern Res Arrow Rock as owned by a state government. The KS 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 17 active systems in Osage County (5.9%) are also owned by a state government.
Does Melvern Res Arrow Rock have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2026. The violations listed here began between April 1996 and January 2026. By type: 2 monitoring and reporting and 1 monitoring. The contaminants or rules involved are Revised Total Coliform Rule, Total coliform bacteria (TCR) and Surface Water Treatment Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 2026-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2002-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
All 3 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.
Melvern Res Arrow Rock: frequently asked questions
Who runs Melvern Res Arrow Rock?
Melvern Res Arrow Rock (PWSID KS2113903) is a transient non-community water system owned by a state government. It is regulated by the KS state drinking water program.
How many people does Melvern Res Arrow Rock serve?
Melvern Res Arrow Rock reports serving 25 people through 1 service connection in Osage County, Kansas.
Where does Melvern Res Arrow Rock get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Melvern Res Arrow Rock have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in January 2026. 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 Melvern Res Arrow Rock'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 3 violations for this system; none is health-based, and the most recent began in January 2026. For current results, consult EPA ECHO, or the KS state drinking water program.
Where can I find Melvern Res Arrow Rock's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Melvern Res Arrow Rock is a 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 Osage County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Osage Co Rwd 5 | Osage | 3,875 | Community | Purchased surface water |
| Osage City, City of | Osage | 2,809 | Community | Surface water |
| Osage Co Rwd 8 | Osage | 2,240 | Community | Purchased surface water |
| Osage Co Rwd 7 | Osage | 1,430 | Community | Purchased surface water |
| Carbondale, City of | Osage | 1,344 | Community | Surface water |
| Lyndon, City of | Osage | 1,049 | Community | Purchased surface water |
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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, “Melvern Res Arrow Rock, PWSID KS2113903, Kansas”, https://aquacensus.com/water-systems/kansas/melvern-res-arrow-rock-ks2113903 (data as of October 1, 2026).