Public water system · IA4884023
ActiveWilliamsburg Public Water Supply
At a glance
Williamsburg Public Water Supply (PWSID IA4884023) is an active community water system in Iowa County, Iowa. It reports serving 3,345 people through 1,332 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
3,345
Service connections
1,332
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Williamsburg Public Water Supply compare with other water systems in Iowa County?
By EPA's size categories, Williamsburg Public Water Supply is a medium system (3,301 to 10,000 people). Iowa County has 15 active public water systems, and Williamsburg Public Water Supply is the largest of them by population served. Its population served is about 3.8 times the county average of 884 people per system, and accounts for 25% of the 13,265 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 Williamsburg Public Water Supply is about half of 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 Williamsburg Public Water Supply?
EPA lists Williamsburg Public 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. 7 of the 15 active systems in Iowa County (47%) are also owned by a local government.
Does Williamsburg Public Water Supply have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2023. The violations listed here began between May 1998 and December 2023. By type: 9 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 Nitrite (6 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2023-12-21 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2018-10-01 | Monitoring and reportingWater Quality Parameter M/R · code 53 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2017-02-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2017-02-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2013-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2012-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitritecode 1041 | Yes | Resolved |
| 2009-11-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2001-05-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1998-06-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1998-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitritecode 1041 | Yes | Resolved |
The 12 most recent 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.
Williamsburg Public Water Supply: frequently asked questions
Who runs Williamsburg Public Water Supply?
Williamsburg Public Water Supply (PWSID IA4884023) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Williamsburg Public Water Supply serve?
Williamsburg Public Water Supply reports serving 3,345 people through 1,332 service connections in Iowa County, Iowa.
Where does Williamsburg Public 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 Williamsburg Public Water Supply have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2023. 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 Williamsburg Public 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. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in December 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Williamsburg Public Water Supply's water quality report?
As a community water system, Williamsburg Public 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 Iowa County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Poweshiek Water Association (Iac) | Iowa | 2,490 | Community | Groundwater |
| Marengo Water Supply | Iowa | 2,435 | Community | Groundwater |
| Amana Society Water System North | Iowa | 1,248 | Community | Groundwater |
| North English Water Department | Iowa | 1,065 | Community | Groundwater |
| Victor Municipal Water Dept | Iowa | 875 | Community | Groundwater |
| Kinze Manufacturing Inc. | Iowa | 710 | Non-transient non-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, “Williamsburg Public Water Supply, PWSID IA4884023, Iowa”, https://aquacensus.com/water-systems/iowa/williamsburg-public-water-supply-ia4884023 (data as of October 1, 2026).