Public water system · IA3570037
ActiveSheffield Water Supply
At a glance
Sheffield Water Supply (PWSID IA3570037) is an active community water system in Franklin County, Iowa. It reports serving 1,130 people through 506 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; 2 are health-based, and the most recent began in July 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,130
Service connections
506
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Sheffield Water Supply compare with other water systems in Franklin County?
By EPA's size categories, Sheffield Water Supply is a small system (501 to 3,300 people). Franklin County has 20 active public water systems, and Sheffield Water Supply is the 3rd-largest of them by population served. Its population served is about twice the county average of 517 people per system, and accounts for 11% of the 10,347 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 Sheffield 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 Sheffield Water Supply?
EPA lists Sheffield 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 20 active systems in Franklin County (40%) are also owned by a local government.
Does Sheffield Water Supply have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2014. The violations listed here began between January 1979 and July 2014. By type: 3 monitoring and reporting, 2 public notice, recordkeeping or other and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Nitrate (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 |
|---|---|---|---|---|
| 2014-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2009-10-27 | Public notice, recordkeeping or otherVariance/Exemption/Other Compliance · code 08 | Not reported | No | Resolved |
| 2008-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Nitratecode 1040 | Yes | Resolved |
| 2005-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 1999-10-19 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1979-01-30 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Nitratecode 1040 | 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.
Sheffield Water Supply: frequently asked questions
Who runs Sheffield Water Supply?
Sheffield Water Supply (PWSID IA3570037) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Sheffield Water Supply serve?
Sheffield Water Supply reports serving 1,130 people through 506 service connections in Franklin County, Iowa.
Where does Sheffield 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 Sheffield Water Supply have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in July 2014. 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 Sheffield 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; 2 are health-based, and the most recent began in July 2014. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Sheffield Water Supply's water quality report?
As a community water system, Sheffield 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 Franklin County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Hampton Muni Water Works | Franklin | 4,337 | Community | Groundwater |
| Irua (Dows) | Franklin | 2,042 | Non-transient non-community | Groundwater |
| Dudleys Corner | Franklin | 912 | Transient non-community | Groundwater |
| Latimer Water Supply | Franklin | 477 | Community | Groundwater |
| Zion Reformed Church | Franklin | 225 | Transient non-community | Groundwater |
| Coulter Water Supply | Franklin | 219 | 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, “Sheffield Water Supply, PWSID IA3570037, Iowa”, https://aquacensus.com/water-systems/iowa/sheffield-water-supply-ia3570037 (data as of October 1, 2026).