Public water system · IA4641064
ActiveHumboldt Municipal Water Dept
At a glance
Humboldt Municipal Water Dept (PWSID IA4641064) is an active community water system in Humboldt County, Iowa. It reports serving 4,792 people through 2,058 service connections. Its primary water source is groundwater under influence of surface water, and EPA lists it as owned by a local government. EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,792
Service connections
2,058
Primary source
GU
Groundwater under influence of surface water
System type
CWS
Community water system
System record
How does Humboldt Municipal Water Dept compare with other water systems in Humboldt County?
By EPA's size categories, Humboldt Municipal Water Dept is a medium system (3,301 to 10,000 people). Humboldt County has 13 active public water systems, and Humboldt Municipal Water Dept is the largest of them by population served. Its population served is about 8.7 times the county average of 550 people per system, and accounts for 67% of the 7,145 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 Humboldt Municipal Water Dept is about 29% 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. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules. 7 Iowa systems (0.4%) list groundwater under influence of surface water as their primary source.
Who owns and regulates Humboldt Municipal Water Dept?
EPA lists Humboldt Municipal Water Dept 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. 11 of the 13 active systems in Humboldt County (85%) are also owned by a local government.
Does Humboldt Municipal Water Dept have drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 2020. The violations listed here began between August 2009 and May 2020. By type: 1 monitoring and reporting and 1 contaminant level above the legal limit. The contaminants or rules involved are Long Term 2 Enhanced Surface Water Treatment Rule and Total coliform bacteria (TCR). EPA lists 1 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 |
|---|---|---|---|---|
| 2020-05-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Long Term 2 Enhanced Surface Water Treatment Rulecode 0800 | No | Archived |
| 2009-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Humboldt Municipal Water Dept: frequently asked questions
Who runs Humboldt Municipal Water Dept?
Humboldt Municipal Water Dept (PWSID IA4641064) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Humboldt Municipal Water Dept serve?
Humboldt Municipal Water Dept reports serving 4,792 people through 2,058 service connections in Humboldt County, Iowa.
Where does Humboldt Municipal Water Dept get its water?
EPA SDWIS lists this system's primary water source as groundwater under influence of surface water. Groundwater under the influence of surface water is well or spring water that the regulator has found to be affected by nearby surface water, so it is regulated under the surface-water treatment rules.
Does Humboldt Municipal Water Dept have any drinking water violations?
EPA's records list 2 violations for this system; 1 is health-based, and the most recent began in May 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 Humboldt Municipal Water Dept'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 2 violations for this system; 1 is health-based, and the most recent began in May 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Humboldt Municipal Water Dept's water quality report?
As a community water system, Humboldt Municipal Water Dept 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 Humboldt County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dakota City Water Supply | Humboldt | 769 | Community | Groundwater |
| Livermore Water Supply | Humboldt | 383 | Community | Groundwater |
| Bode Municipal Water Supply | Humboldt | 304 | Community | Groundwater |
| Renwick Munic Water Supply | Humboldt | 234 | Community | Groundwater |
| Thor Water Works | Humboldt | 181 | Community | Groundwater |
| Rutland Water Supply | Humboldt | 116 | 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, “Humboldt Municipal Water Dept, PWSID IA4641064, Iowa”, https://aquacensus.com/water-systems/iowa/humboldt-municipal-water-dept-ia4641064 (data as of October 1, 2026).