Public water system · IA5728018
ActiveEly Water Supply
At a glance
Ely Water Supply (PWSID IA5728018) is an active community water system in Linn County, Iowa. It reports serving 2,328 people through 853 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 6 violations for this system; none is health-based, and the most recent began in May 2019.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
2,328
Service connections
853
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Ely Water Supply compare with other water systems in Linn County?
By EPA's size categories, Ely Water Supply is a small system (501 to 3,300 people). Linn County has 82 active public water systems. Its population served is about 15% below the county average of 2,739 people per system, and accounts for 1% 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 Ely Water Supply is about 65% 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 Ely Water Supply?
EPA lists Ely 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 Ely Water Supply have drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in May 2019. The violations listed here began between July 1986 and May 2019. By type: 5 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Nitrate (2 of them). EPA lists 6 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 |
|---|---|---|---|---|
| 2019-05-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2000-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 2000-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1991-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1987-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1986-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
All 6 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.
Ely Water Supply: frequently asked questions
Who runs Ely Water Supply?
Ely Water Supply (PWSID IA5728018) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Ely Water Supply serve?
Ely Water Supply reports serving 2,328 people through 853 service connections in Linn County, Iowa.
Where does Ely 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 Ely Water Supply have any drinking water violations?
EPA's records list 6 violations for this system; none is health-based, and the most recent began in May 2019. 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 Ely 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 6 violations for this system; none is health-based, and the most recent began in May 2019. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Ely Water Supply's water quality report?
As a community water system, Ely 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 |
| Mount Vernon Water Supply | Linn | 4,527 | Community | Groundwater |
| Fairfax Water Supply | Linn | 2,828 | Community | Groundwater |
| Center Point Water Supply | Linn | 2,579 | 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, “Ely Water Supply, PWSID IA5728018, Iowa”, https://aquacensus.com/water-systems/iowa/ely-water-supply-ia5728018 (data as of October 1, 2026).