Public water system · IA3060091
ActiveOkoboji Water Supply
At a glance
Okoboji Water Supply (PWSID IA3060091) is an active community water system in Dickinson County, Iowa. It reports serving 776 people through 1,129 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2018.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
776
Service connections
1,129
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Okoboji Water Supply compare with other water systems in Dickinson County?
By EPA's size categories, Okoboji Water Supply is a small system (501 to 3,300 people). Dickinson County has 14 active public water systems, and Okoboji Water Supply is the 5th-largest of them by population served. Its population served is about 25% below the county average of 1,028 people per system, and accounts for 5.4% of the 14,395 people reported by systems filed under the county. Across Iowa, the 1,828 active systems average 1,718 people each. Nationally, the average active community water system reports serving 6,703 people, so Okoboji Water Supply 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. Iowa has 1,084 active community water systems, 59% of the state's 1,828 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 119 Iowa systems (6.5%) list purchased surface water as their primary source.
Who owns and regulates Okoboji Water Supply?
EPA lists Okoboji Water Supply as owned by a local government. The IA state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 10 of the 14 active systems in Dickinson County (71%) are also owned by a local government.
Does Okoboji Water Supply have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2018. By type: 1 monitoring. The contaminant or rule involved is Revised Total Coliform 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 |
|---|---|---|---|---|
| 2018-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | 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.
Okoboji Water Supply: frequently asked questions
Who runs Okoboji Water Supply?
Okoboji Water Supply (PWSID IA3060091) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Okoboji Water Supply serve?
Okoboji Water Supply reports serving 776 people through 1,129 service connections in Dickinson County, Iowa.
Where does Okoboji Water Supply get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Okoboji Water Supply have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in July 2018. 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 Okoboji Water Supply'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 not health-based, and the most recent began in July 2018. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Okoboji Water Supply's water quality report?
As a community water system, Okoboji Water Supply 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 Dickinson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Spirit Lake Waterworks | Dickinson | 6,167 | Community | Surface water |
| Milford Municipal Utilities | Dickinson | 3,431 | Community | Surface water |
| Lake Park Municipal Utilities | Dickinson | 1,167 | Community | Purchased groundwater |
| Arnolds Park Water Department | Dickinson | 1,113 | Community | Purchased surface water |
| Wahpeton Water Supply | Dickinson | 408 | Community | Surface water |
| Terril Municipal Waterworks | Dickinson | 334 | 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, “Okoboji Water Supply, PWSID IA3060091, Iowa”, https://aquacensus.com/water-systems/iowa/okoboji-water-supply-ia3060091 (data as of October 1, 2026).