Public water system · SD4680036
ActiveCoe-Lk S/Left Tailrace
At a glance
Coe-Lk S/Left Tailrace (PWSID SD4680036) is an active transient non-community water system in Buffalo County, South Dakota. It reports serving 130 people through 15 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal 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
130
Service connections
15
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Coe-Lk S/Left Tailrace compare with other water systems in Buffalo County?
By EPA's size categories, Coe-Lk S/Left Tailrace is a very small system (500 people or fewer). Buffalo County has 1 active public water system, and Coe-Lk S/Left Tailrace is the largest of them by population served. Its population served is roughly in line with the county average of 130 people per system, and accounts for 100% of the 130 people reported by systems filed under the county. Across South Dakota, the 699 active systems average 1,387 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Coe-Lk S/Left Tailrace 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. South Dakota has 173 active transient non-community water systems, 25% of the state's 699 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 431 South Dakota systems (62%) list groundwater as their primary source.
Who owns and regulates Coe-Lk S/Left Tailrace?
EPA lists Coe-Lk S/Left Tailrace as owned by the federal government. The SD 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 1 active systems in Buffalo County (100%) are also owned by the federal government.
Does Coe-Lk S/Left Tailrace 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 July 1991 and May 2018. By type: 1 monitoring and 1 monitoring and reporting. The contaminants or rules involved are Revised Total Coliform Rule and Total coliform bacteria (TCR). 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 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1991-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | 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.
Coe-Lk S/Left Tailrace: frequently asked questions
Who runs Coe-Lk S/Left Tailrace?
Coe-Lk S/Left Tailrace (PWSID SD4680036) is a transient non-community water system owned by the federal government. It is regulated by the SD state drinking water program.
How many people does Coe-Lk S/Left Tailrace serve?
Coe-Lk S/Left Tailrace reports serving 130 people through 15 service connections in Buffalo County, South Dakota.
Where does Coe-Lk S/Left Tailrace 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 Coe-Lk S/Left Tailrace 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 Coe-Lk S/Left Tailrace'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 SD state drinking water program.
Where can I find Coe-Lk S/Left Tailrace's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Coe-Lk S/Left Tailrace 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.
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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, “Coe-Lk S/Left Tailrace, PWSID SD4680036, South Dakota”, https://aquacensus.com/water-systems/south-dakota/coe-lk-s-left-tailrace-sd4680036 (data as of October 1, 2026).