Public water system · OK4004217
ActiveSham-Rock-Chalk, LLC
At a glance
Sham-Rock-Chalk, LLC (PWSID OK4004217) is an active transient non-community water system in Logan County, Oklahoma. It reports serving 155 people through 6 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
155
Service connections
6
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Sham-Rock-Chalk, LLC compare with other water systems in Logan County?
By EPA's size categories, Sham-Rock-Chalk, LLC is a very small system (500 people or fewer). Logan County has 30 active public water systems. Its population served is well below the county average of 919 people per system, and accounts for 0.6% of the 27,575 people reported by systems filed under the county. Across Oklahoma, the 1,254 active systems average 2,907 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Sham-Rock-Chalk, LLC is roughly in line with 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. Oklahoma has 306 active transient non-community water systems, 24% of the state's 1,254 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 701 Oklahoma systems (56%) list groundwater as their primary source.
Who owns and regulates Sham-Rock-Chalk, LLC?
EPA lists Sham-Rock-Chalk, LLC as privately owned. The OK state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 20 of the 30 active systems in Logan County (67%) are also privately owned.
Does Sham-Rock-Chalk, LLC have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between July 2023 and July 2024. By type: 3 monitoring. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 3 as resolved. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2024-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2024-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
Sham-Rock-Chalk, LLC: frequently asked questions
Who runs Sham-Rock-Chalk, LLC?
Sham-Rock-Chalk, LLC (PWSID OK4004217) is a transient non-community water system privately owned. It is regulated by the OK state drinking water program.
How many people does Sham-Rock-Chalk, LLC serve?
Sham-Rock-Chalk, LLC reports serving 155 people through 6 service connections in Logan County, Oklahoma.
Where does Sham-Rock-Chalk, LLC 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 Sham-Rock-Chalk, LLC have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024. 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 Sham-Rock-Chalk, LLC'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 July 2024. For current results, consult EPA ECHO, or the OK state drinking water program.
Where can I find Sham-Rock-Chalk, LLC's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Sham-Rock-Chalk, LLC 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 Logan County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Guthrie | Logan | 9,925 | Community | Surface water |
| Logan Co Rwd #1 | Logan | 8,907 | Community | Purchased surface water |
| Langston Pwa | Logan | 1,670 | Community | Surface water |
| Logan Co Rws & Swmd #3 | Logan | 1,618 | Community | Groundwater |
| Crescent | Logan | 1,411 | Community | Groundwater |
| Logan Co Rwd #2 | Logan | 1,146 | 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, “Sham-Rock-Chalk, LLC, PWSID OK4004217, Oklahoma”, https://aquacensus.com/water-systems/oklahoma/sham-rock-chalk-llc-ok4004217 (data as of October 1, 2026).