Public water system · IA4027010
ActiveJewell Water Supply
At a glance
Jewell Water Supply (PWSID IA4027010) is an active community water system in Hamilton County, Iowa. It reports serving 1,216 people through 536 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,216
Service connections
536
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Jewell Water Supply compare with other water systems in Hamilton County?
By EPA's size categories, Jewell Water Supply is a small system (501 to 3,300 people). Hamilton County has 13 active public water systems, and Jewell Water Supply is the 3rd-largest of them by population served. Its population served is about 11% above the county average of 1,099 people per system, and accounts for 8.5% 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 Jewell 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 Jewell Water Supply?
EPA lists Jewell 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 Jewell Water Supply have drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024. The violations listed here began between January 1995 and July 2024. By type: 3 monitoring and reporting. The contaminants or rules involved are Nitrite, Nitrate and Dichloromethane. EPA lists 3 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 |
|---|---|---|---|---|
| 2024-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 2024-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
All 3 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.
Jewell Water Supply: frequently asked questions
Who runs Jewell Water Supply?
Jewell Water Supply (PWSID IA4027010) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Jewell Water Supply serve?
Jewell Water Supply reports serving 1,216 people through 536 service connections in Hamilton County, Iowa.
Where does Jewell 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 Jewell Water Supply have any drinking water violations?
EPA's records list 3 violations for this system; none is health-based, and the most recent began in July 2024. 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 Jewell 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 3 violations for this system; none is health-based, and the most recent began in July 2024. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Jewell Water Supply's water quality report?
As a community water system, Jewell 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 |
|---|---|---|---|---|
| Webster City Water Supply | Hamilton | 7,825 | Community | Groundwater |
| Flying J No 572 | Hamilton | 1,892 | Non-transient non-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, “Jewell Water Supply, PWSID IA4027010, Iowa”, https://aquacensus.com/water-systems/iowa/jewell-water-supply-ia4027010 (data as of October 1, 2026).