Public water system · SD4600174
ActiveIroquois
At a glance
Iroquois (PWSID SD4600174) is an active community water system serving Kingsbury and Beadle counties, South Dakota. It reports serving 292 people through 162 service connections. Its primary water source is purchased groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in October 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
292
Service connections
162
Primary source
GWP
Purchased groundwater
System type
CWS
Community water system
System record
How does Iroquois compare with other water systems in South Dakota?
By EPA's size categories, Iroquois is a very small system (500 people or fewer). 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 Iroquois 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 Iroquois?
EPA lists Iroquois 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.
Does Iroquois have drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in October 2005. The violations listed here began between July 1976 and October 2005. By type: 3 monitoring and reporting, 2 contaminant level above the legal limit and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2005-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1997-01-20 | Public notice, recordkeeping or otherNotification, Public · code 06 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1996-12-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1980-03-07 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | 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 6 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.
Iroquois: frequently asked questions
Who runs Iroquois?
Iroquois (PWSID SD4600174) is a community water system owned by a local government. It is regulated by the SD state drinking water program.
How many people does Iroquois serve?
Iroquois reports serving 292 people through 162 service connections in Kingsbury and Beadle counties, South Dakota.
Where does Iroquois 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 Iroquois have any drinking water violations?
EPA's records list 6 violations for this system; 2 are health-based, and the most recent began in October 2005. 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 Iroquois' 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 6 violations for this system; 2 are health-based, and the most recent began in October 2005. For current results, consult the system's annual water quality report, EPA ECHO, or the SD state drinking water program.
Where can I find Iroquois' water quality report?
As a community water system, Iroquois 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 Kingsbury County(the first county EPA lists for this system)
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Kingbrook Ii Rural Water System | Kingsbury | 2,715 | Community | Groundwater |
| De Smet | Kingsbury | 1,056 | Community | Groundwater |
| Arlington | Kingsbury | 915 | Community | Purchased groundwater |
| Lake Preston | Kingsbury | 589 | Community | Purchased groundwater |
| Spring Lake Colony | Kingsbury | 114 | Community | Groundwater |
| Badger | Kingsbury | 105 | 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, “Iroquois, PWSID SD4600174, South Dakota”, https://aquacensus.com/water-systems/south-dakota/iroquois-sd4600174 (data as of October 1, 2026).