Public water system · IA5758021
ActiveMount Vernon Water Supply
At a glance
Mount Vernon Water Supply (PWSID IA5758021) is an active community water system in Linn County, Iowa. It reports serving 4,527 people through 1,360 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2012.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
4,527
Service connections
1,360
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Mount Vernon Water Supply compare with other water systems in Linn County?
By EPA's size categories, Mount Vernon Water Supply is a medium system (3,301 to 10,000 people). Linn County has 82 active public water systems, and Mount Vernon Water Supply is the 4th-largest of them by population served. Its population served is about 65% above the county average of 2,739 people per system, and accounts for 2% of the 224,589 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 Mount Vernon Water Supply is about 32% 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 Mount Vernon Water Supply?
EPA lists Mount Vernon 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. 23 of the 82 active systems in Linn County (28%) are also owned by a local government.
Does Mount Vernon Water Supply have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2012. The violations listed here began between April 2004 and June 2012. By type: 7 monitoring and reporting and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Haloacetic acids (HAA5) (3 of them). EPA lists 8 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 |
|---|---|---|---|---|
| 2012-06-20 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2012-02-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2006-11-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2004-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2004-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2004-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
All 8 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.
Mount Vernon Water Supply: frequently asked questions
Who runs Mount Vernon Water Supply?
Mount Vernon Water Supply (PWSID IA5758021) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Mount Vernon Water Supply serve?
Mount Vernon Water Supply reports serving 4,527 people through 1,360 service connections in Linn County, Iowa.
Where does Mount Vernon 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 Mount Vernon Water Supply have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2012. 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 Mount Vernon 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 8 violations for this system; none is health-based, and the most recent began in June 2012. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Mount Vernon Water Supply's water quality report?
As a community water system, Mount Vernon 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 Linn County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Cedar Rapids Water Department | Linn | 142,364 | Community | Groundwater under influence of surface water |
| Marion Municipal Water Dept | Linn | 41,623 | Community | Groundwater |
| Hiawatha Water Dept | Linn | 7,183 | Community | Groundwater |
| Fairfax Water Supply | Linn | 2,828 | Community | Groundwater |
| Center Point Water Supply | Linn | 2,579 | Community | Groundwater |
| Ely Water Supply | Linn | 2,328 | 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, “Mount Vernon Water Supply, PWSID IA5758021, Iowa”, https://aquacensus.com/water-systems/iowa/mount-vernon-water-supply-ia5758021 (data as of October 1, 2026).