Public water system · IA9464008
ActiveOtho Water Supply
At a glance
Otho Water Supply (PWSID IA9464008) is an active community water system in Webster County, Iowa. It reports serving 431 people through 225 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2015.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
431
Service connections
225
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Otho Water Supply compare with other water systems in Webster County?
By EPA's size categories, Otho Water Supply is a very small system (500 people or fewer). Webster County has 29 active public water systems, and Otho Water Supply is the 6th-largest of them by population served. Its population served is well below the county average of 1,330 people per system, and accounts for 1.1% of the 38,572 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 Otho 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. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,502 Iowa systems (82%) list groundwater as their primary source.
Who owns and regulates Otho Water Supply?
EPA lists Otho 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. 15 of the 29 active systems in Webster County (52%) are also owned by a local government.
Does Otho Water Supply have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2015. The violations listed here began between July 1993 and July 2015. By type: 4 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 7 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 |
|---|---|---|---|---|
| 2015-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2011-06-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2009-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) adipatecode 2035 | No | Resolved |
| 2002-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1994-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 7 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.
Otho Water Supply: frequently asked questions
Who runs Otho Water Supply?
Otho Water Supply (PWSID IA9464008) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Otho Water Supply serve?
Otho Water Supply reports serving 431 people through 225 service connections in Webster County, Iowa.
Where does Otho Water Supply 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 Otho Water Supply have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2015. 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 Otho 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 7 violations for this system; 2 are health-based, and the most recent began in July 2015. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Otho Water Supply's water quality report?
As a community water system, Otho 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 Webster County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Fort Dodge Water Supply | Webster | 25,874 | Community | Groundwater |
| Xenia Rwd (North) | Webster + 3 more | 6,122 | Community | Groundwater |
| Gowrie Muni Utilities Water Dept | Webster | 954 | Community | Groundwater |
| Dayton Municipal Water Supply | Webster | 772 | Community | Groundwater |
| Badger Water Supply | Webster | 561 | Community | Groundwater |
| Palace Park Mhc | Webster | 426 | 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, “Otho Water Supply, PWSID IA9464008, Iowa”, https://aquacensus.com/water-systems/iowa/otho-water-supply-ia9464008 (data as of October 1, 2026).