Public water system · SD4600207
ActiveMilbank
At a glance
Milbank (PWSID SD4600207) is an active community water system in Grant County, South Dakota. It reports serving 3,544 people through 2,100 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,544
Service connections
2,100
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Milbank compare with other water systems in Grant County?
By EPA's size categories, Milbank is a medium system (3,301 to 10,000 people). Grant County has 5 active public water systems, and Milbank is the 2nd-largest of them by population served. Its population served is about twice the county average of 1,824 people per system, and accounts for 39% 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 Milbank is about half of 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 Milbank?
EPA lists Milbank 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. 3 of the 5 active systems in Grant County (60%) are also owned by a local government.
Does Milbank have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2020. The violations listed here began between July 1976 and June 2020. By type: 3 monitoring and reporting. The contaminants or rules involved are E. coli, Gross alpha (excluding radon and uranium) and Combined Radium (-226 and -228). EPA lists 2 as archived and 1 as resolved. 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. 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 |
|---|---|---|---|---|
| 2020-06-06 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Archived |
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.
Milbank: frequently asked questions
Who runs Milbank?
Milbank (PWSID SD4600207) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Milbank serve?
Milbank reports serving 3,544 people through 2,100 service connections in Grant County, South Dakota.
Where does Milbank 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 Milbank have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in June 2020. 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 Milbank'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; none is health-based, and the most recent began in June 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Milbank's water quality report?
As a community water system, Milbank 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 |
| Big Stone City | Grant | 412 | Community | Purchased groundwater |
| Sunrise Colony | Grant | 94 | Community | Groundwater |
| Marvin | Grant | 19 | Community | Groundwater |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Milbank, PWSID SD4600207, South Dakota”, https://aquacensus.com/water-systems/south-dakota/milbank-sd4600207 (data as of October 1, 2026).