Public water system · SD4600329
ActiveNorth Hermosa Wud
At a glance
North Hermosa Wud (PWSID SD4600329) is an active community water system in Custer County, South Dakota. It reports serving 40 people through 16 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40
Service connections
16
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does North Hermosa Wud compare with other water systems in Custer County?
By EPA's size categories, North Hermosa Wud is a very small system (500 people or fewer). Custer County has 49 active public water systems. Its population served is well below the county average of 274 people per system, and accounts for 0.3% 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 community water system reports serving 6,703 people, so North Hermosa Wud is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. South Dakota has 510 active community water systems, 73% of the state's 699 active systems. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. 100 South Dakota systems (14%) list purchased groundwater as their primary source.
Who owns and regulates North Hermosa Wud?
EPA lists North Hermosa Wud as owned by a local 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. 7 of the 49 active systems in Custer County (14%) are also owned by a local government.
Does North Hermosa Wud have drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2025. The violations listed here began between September 2024 and December 2025. By type: 1 public notice, recordkeeping or other, 1 required treatment not met and 1 monitoring. The contaminants or rules involved are Public Notice, Stage 1 Disinfectants and Disinfection Byproducts Rule and Revised Total Coliform Rule. EPA lists 2 as unaddressed and 1 as resolved. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. 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 |
|---|---|---|---|---|
| 2025-12-13 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2025-02-01 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | Unaddressed |
| 2024-09-01 | 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.
North Hermosa Wud: frequently asked questions
Who runs North Hermosa Wud?
North Hermosa Wud (PWSID SD4600329) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does North Hermosa Wud serve?
North Hermosa Wud reports serving 40 people through 16 service connections in Custer County, South Dakota.
Where does North Hermosa Wud get its water?
EPA SDWIS lists this system's primary water source as purchased groundwater. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own.
Does North Hermosa Wud have any drinking water violations?
EPA's records list 3 violations for this system; 1 is health-based, and the most recent began in December 2025. 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 North Hermosa Wud'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; 1 is health-based, and the most recent began in December 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find North Hermosa Wud's water quality report?
As a community water system, North Hermosa Wud must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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, “North Hermosa Wud, PWSID SD4600329, South Dakota”, https://aquacensus.com/water-systems/south-dakota/north-hermosa-wud-sd4600329 (data as of October 1, 2026).