Public water system · IA4063094
ActiveWebster City Water Supply
At a glance
Webster City Water Supply (PWSID IA4063094) is an active community water system in Hamilton County, Iowa. It reports serving 7,825 people through 3,748 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; 3 are health-based, and the most recent began in June 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
7,825
Service connections
3,748
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Webster City Water Supply compare with other water systems in Hamilton County?
By EPA's size categories, Webster City Water Supply is a medium system (3,301 to 10,000 people). Hamilton County has 13 active public water systems, and Webster City Water Supply is the largest of them by population served. Its population served is about 7.1 times the county average of 1,099 people per system, and accounts for 55% of the 14,289 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 Webster City Water Supply is about 17% above 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 Webster City Water Supply?
EPA lists Webster City 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. 8 of the 13 active systems in Hamilton County (62%) are also owned by a local government.
Does Webster City Water Supply have drinking water violations?
EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in June 2020. The violations listed here began between May 1983 and June 2020. By type: 4 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Arsenic (3 of them). EPA lists 6 as resolved and 1 as archived. 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. 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.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2020-06-30 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Resolved |
| 2001-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2001-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2000-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1992-07-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1983-05-02 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Arseniccode 1005 | Yes | Archived |
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.
Webster City Water Supply: frequently asked questions
Who runs Webster City Water Supply?
Webster City Water Supply (PWSID IA4063094) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Webster City Water Supply serve?
Webster City Water Supply reports serving 7,825 people through 3,748 service connections in Hamilton County, Iowa.
Where does Webster City 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 Webster City Water Supply have any drinking water violations?
EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in June 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 Webster City 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; 3 are health-based, and the most recent began in June 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 Webster City Water Supply's water quality report?
As a community water system, Webster City 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 Hamilton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Flying J No 572 | Hamilton | 1,892 | Non-transient non-community | Groundwater |
| Jewell Water Supply | Hamilton | 1,216 | Community | Groundwater |
| Stratford Muni Water Dept | Hamilton | 707 | Community | Groundwater |
| Williams Travel Center | Hamilton | 610 | Transient non-community | Groundwater |
| Ellsworth Public Water Supply | Hamilton | 514 | Community | Groundwater |
| Stanhope Water Department | Hamilton | 364 | 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, “Webster City Water Supply, PWSID IA4063094, Iowa”, https://aquacensus.com/water-systems/iowa/webster-city-water-supply-ia4063094 (data as of October 1, 2026).