Public water system · SD4680044
ActiveNps-Jewel Cave National Monument
At a glance
Nps-Jewel Cave National Monument (PWSID SD4680044) is an active transient non-community water system in Custer County, South Dakota. It reports serving 219 people through 13 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2004.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
219
Service connections
13
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Nps-Jewel Cave National Monument compare with other water systems in Custer County?
By EPA's size categories, Nps-Jewel Cave National Monument is a very small system (500 people or fewer). Custer County has 49 active public water systems. Its population served is about 20% below the county average of 274 people per system, and accounts for 1.6% of the 13,414 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 Nps-Jewel Cave National Monument is about 52% 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 Nps-Jewel Cave National Monument?
EPA lists Nps-Jewel Cave National Monument 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. 3 of the 49 active systems in Custer County (6.1%) are also owned by the federal government.
Does Nps-Jewel Cave National Monument have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in January 2004. By type: 1 monitoring and reporting. The contaminant or rule involved is Nitrate. EPA lists 1 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 |
|---|---|---|---|---|
| 2004-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
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.
Nps-Jewel Cave National Monument: frequently asked questions
Who runs Nps-Jewel Cave National Monument?
Nps-Jewel Cave National Monument (PWSID SD4680044) 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 Nps-Jewel Cave National Monument serve?
Nps-Jewel Cave National Monument reports serving 219 people through 13 service connections in Custer County, South Dakota.
Where does Nps-Jewel Cave National Monument 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 Nps-Jewel Cave National Monument 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 January 2004. 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 Nps-Jewel Cave National Monument'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 January 2004. For current results, consult EPA ECHO, or the SD state drinking water program.
Where can I find Nps-Jewel Cave National Monument's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Nps-Jewel Cave National Monument 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 Custer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Laughing Water Restaurant at Crazy H | Custer | 2,055 | Non-transient non-community | Groundwater |
| Custer | Custer | 1,919 | Community | Groundwater |
| Nps-Wind Cave National Park | Custer | 1,404 | Non-transient non-community | Groundwater |
| Southern Black Hills Water | Custer + 1 more | 947 | Community | Groundwater |
| Csp-Sylvan Lake | Custer | 799 | Transient non-community | Groundwater |
| Csp-Game Lodge | Custer | 541 | 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, “Nps-Jewel Cave National Monument, PWSID SD4680044, South Dakota”, https://aquacensus.com/water-systems/south-dakota/nps-jewel-cave-national-monument-sd4680044 (data as of October 1, 2026).