Public water system · SD4600071
ActiveBrookings Municipal Utilities
At a glance
Brookings Municipal Utilities (PWSID SD4600071) is an active community water system in Brookings County, South Dakota. It reports serving 23,377 people through 8,447 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
23,377
Service connections
8,447
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Brookings Municipal Utilities compare with other water systems in Brookings County?
By EPA's size categories, Brookings Municipal Utilities is a large system (10,001 to 100,000 people). Brookings County has 12 active public water systems, and Brookings Municipal Utilities is the largest of them by population served. Its population served is about 6.8 times the county average of 3,439 people per system, and accounts for 57% of the 41,264 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 Brookings Municipal Utilities is about 3.5 times 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 Brookings Municipal Utilities?
EPA lists Brookings Municipal Utilities 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. 5 of the 12 active systems in Brookings County (42%) are also owned by a local government.
Does Brookings Municipal Utilities have drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 2020. The violations listed here began between July 1976 and July 2020. By type: 3 monitoring and reporting, 1 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Gross alpha (excluding radon and uranium) (2 of them). EPA lists 3 as archived and 2 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 |
|---|---|---|---|---|
| 2020-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2003-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | 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 |
| 1976-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
All 5 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.
Brookings Municipal Utilities: frequently asked questions
Who runs Brookings Municipal Utilities?
Brookings Municipal Utilities (PWSID SD4600071) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Brookings Municipal Utilities serve?
Brookings Municipal Utilities reports serving 23,377 people through 8,447 service connections in Brookings County, South Dakota.
Where does Brookings Municipal Utilities 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 Brookings Municipal Utilities have any drinking water violations?
EPA's records list 5 violations for this system; 1 is health-based, and the most recent began in July 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 Brookings Municipal Utilities' 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 5 violations for this system; 1 is health-based, and the most recent began in July 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 Brookings Municipal Utilities' water quality report?
As a community water system, Brookings Municipal Utilities 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 Brookings County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kingbrook I Rural Water System | Brookings | 6,455 | Community | Purchased groundwater |
| Brookings-Deuel Rural Water System | Brookings + 1 more | 6,200 | Community | Groundwater |
| Volga | Brookings | 2,340 | Community | Groundwater |
| Aurora | Brookings | 1,200 | Community | Purchased groundwater |
| Elkton | Brookings | 755 | Community | Purchased groundwater |
| White | Brookings | 499 | Community | Purchased 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, “Brookings Municipal Utilities, PWSID SD4600071, South Dakota”, https://aquacensus.com/water-systems/south-dakota/brookings-municipal-utilities-sd4600071 (data as of October 1, 2026).