Public water system · SD4600708
ActiveSpearfish Koa
At a glance
Spearfish Koa (PWSID SD4600708) is an active transient non-community water system in Lawrence County, South Dakota. It reports serving 256 people through 101 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 July 1994.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
256
Service connections
101
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Spearfish Koa compare with other water systems in Lawrence County?
By EPA's size categories, Spearfish Koa is a very small system (500 people or fewer). Lawrence County has 73 active public water systems. Its population served is about 31% below the county average of 373 people per system, and accounts for 0.9% of the 27,194 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 Spearfish Koa is about 78% above 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 Spearfish Koa?
EPA lists Spearfish Koa as privately owned. 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. 60 of the 73 active systems in Lawrence County (82%) are also privately owned.
Does Spearfish Koa have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 1994. By type: 1 monitoring and reporting. The contaminant or rule involved is Total coliform bacteria (TCR). 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 |
|---|---|---|---|---|
| 1994-07-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | 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.
Spearfish Koa: frequently asked questions
Who runs Spearfish Koa?
Spearfish Koa (PWSID SD4600708) is a transient non-community water system privately owned. It is regulated by the SD state drinking water program.
How many people does Spearfish Koa serve?
Spearfish Koa reports serving 256 people through 101 service connections in Lawrence County, South Dakota.
Where does Spearfish Koa 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 Spearfish Koa 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 July 1994. 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 Spearfish Koa'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 July 1994. For current results, consult EPA ECHO, or the SD state drinking water program.
Where can I find Spearfish Koa's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Spearfish Koa 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 Lawrence County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Spearfish | Lawrence | 13,803 | Community | Groundwater |
| Lead | Lawrence | 2,982 | Community | Purchased surface water |
| Deadwood | Lawrence | 1,156 | Community | Purchased surface water |
| Whitewood | Lawrence | 879 | Community | Groundwater |
| Guadalajara Mexican Restaurant | Lawrence | 630 | Transient non-community | Groundwater |
| Spearfish Canyon Resort LLC | Lawrence | 492 | Transient non-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, “Spearfish Koa, PWSID SD4600708, South Dakota”, https://aquacensus.com/water-systems/south-dakota/spearfish-koa-sd4600708 (data as of October 1, 2026).