Public water system · SD4600882
ActiveBrown-Day-Marshall Rws
At a glance
Brown-Day-Marshall Rws (PWSID SD4600882) is an active community water system serving Brown, Day and Marshall counties, South Dakota. It reports serving 5,673 people through 2,309 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2011.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
5,673
Service connections
2,309
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Brown-Day-Marshall Rws compare with other water systems in South Dakota?
By EPA's size categories, Brown-Day-Marshall Rws is a medium system (3,301 to 10,000 people). 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 Brown-Day-Marshall Rws is about 15% 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 Brown-Day-Marshall Rws?
EPA lists Brown-Day-Marshall Rws 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.
Does Brown-Day-Marshall Rws have drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2011. The violations listed here began between July 2003 and July 2011. By type: 1 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminants or rules involved are E. coli and Consumer Confidence Rule. EPA lists 2 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 |
|---|---|---|---|---|
| 2011-07-17 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
All 2 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.
Brown-Day-Marshall Rws: frequently asked questions
Who runs Brown-Day-Marshall Rws?
Brown-Day-Marshall Rws (PWSID SD4600882) is a community water system privately owned. It is regulated by the SD state drinking water program.
How many people does Brown-Day-Marshall Rws serve?
Brown-Day-Marshall Rws reports serving 5,673 people through 2,309 service connections in Brown, Day and Marshall counties, South Dakota.
Where does Brown-Day-Marshall Rws 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 Brown-Day-Marshall Rws have any drinking water violations?
EPA's records list 2 violations for this system; none is health-based, and the most recent began in July 2011. 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 Brown-Day-Marshall Rws' 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 2 violations for this system; none is health-based, and the most recent began in July 2011. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Brown-Day-Marshall Rws' water quality report?
As a community water system, Brown-Day-Marshall Rws 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 Brown County(the first county EPA lists for this system)
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aberdeen | Brown | 27,989 | Community | Surface water |
| Groton | Brown | 1,380 | Community | Purchased surface water |
| Warner | Brown | 485 | Community | Purchased surface water |
| Lakeside Estates | Brown | 460 | Community | Purchased surface water |
| Country Village Park | Brown | 340 | Community | Purchased surface water |
| Prairiewood Property Owners | Brown | 300 | Community | Purchased surface water |
Related pages
- All water systems in Brown County· 21 active
- All water systems in Day County· 6 active
- All water systems in Marshall County· 7 active
- All South Dakota public water systems· 699 active
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
- What a drinking water violation notice means
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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, “Brown-Day-Marshall Rws, PWSID SD4600882, South Dakota”, https://aquacensus.com/water-systems/south-dakota/brown-day-marshall-rws-sd4600882 (data as of October 1, 2026).