Public water system · SD4600320
ActiveSunrise Colony
At a glance
Sunrise Colony (PWSID SD4600320) is an active community water system in Grant County, South Dakota. It reports serving 94 people through 35 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 health-based, and the most recent began in May 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
94
Service connections
35
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sunrise Colony compare with other water systems in Grant County?
By EPA's size categories, Sunrise Colony is a very small system (500 people or fewer). Grant County has 5 active public water systems, and Sunrise Colony is the 4th-largest of them by population served. Its population served is well below the county average of 1,824 people per system, and accounts for 1% of the 9,119 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 Sunrise Colony 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. 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 Sunrise Colony?
EPA lists Sunrise Colony 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. 2 of the 5 active systems in Grant County (40%) are also privately owned.
Does Sunrise Colony have drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in May 2025. By type: 1 required treatment not met. The contaminant or rule involved is Stage 1 Disinfectants and Disinfection Byproducts Rule. 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 |
|---|---|---|---|---|
| 2025-05-14 | Required treatment not metTreatment Technique No Certif. Operator · code 12 | Stage 1 Disinfectants and Disinfection Byproducts Rulecode 0400 | Yes | 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.
Sunrise Colony: frequently asked questions
Who runs Sunrise Colony?
Sunrise Colony (PWSID SD4600320) is a community water system privately owned. It is regulated by the SD state drinking water program.
How many people does Sunrise Colony serve?
Sunrise Colony reports serving 94 people through 35 service connections in Grant County, South Dakota.
Where does Sunrise Colony 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 Sunrise Colony have any drinking water violations?
EPA's records list one violation for this system; it is health-based, and the most recent began in May 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 Sunrise Colony'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 health-based, and the most recent began in May 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 Sunrise Colony's water quality report?
As a community water system, Sunrise Colony 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 Grant County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Grant-Roberts Rural Water System | Grant + 2 more | 5,050 | Community | Groundwater |
| Milbank | Grant | 3,544 | Community | Groundwater |
| Big Stone City | Grant | 412 | Community | Purchased groundwater |
| Marvin | Grant | 19 | 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, “Sunrise Colony, PWSID SD4600320, South Dakota”, https://aquacensus.com/water-systems/south-dakota/sunrise-colony-sd4600320 (data as of October 1, 2026).