Public water system · IA9630316
ActiveDeerfield Heights Association
At a glance
Deerfield Heights Association (PWSID IA9630316) is an active community water system in Winneshiek County, Iowa. It reports serving 28 people through 10 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2014.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
28
Service connections
10
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Deerfield Heights Association compare with other water systems in Winneshiek County?
By EPA's size categories, Deerfield Heights Association is a very small system (500 people or fewer). Winneshiek County has 43 active public water systems. Its population served is well below the county average of 343 people per system, and accounts for 0.2% of the 14,733 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 Deerfield Heights Association 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 Deerfield Heights Association?
EPA lists Deerfield Heights Association as privately owned. 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. 27 of the 43 active systems in Winneshiek County (63%) are also privately owned.
Does Deerfield Heights Association have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 2014. The violations listed here began between October 2006 and November 2014. By type: 10 monitoring and reporting, 1 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (9 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 |
|---|---|---|---|---|
| 2014-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2014-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2013-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-10-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2013-06-01 | Public notice, recordkeeping or otherOperations Report · code 10 | Not reported | No | Resolved |
| 2011-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2011-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2006-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-10-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2006-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | 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.
Deerfield Heights Association: frequently asked questions
Who runs Deerfield Heights Association?
Deerfield Heights Association (PWSID IA9630316) is a community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Deerfield Heights Association serve?
Deerfield Heights Association reports serving 28 people through 10 service connections in Winneshiek County, Iowa.
Where does Deerfield Heights Association 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 Deerfield Heights Association have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in November 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 Deerfield Heights Association'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, one is health-based, and the most recent began in November 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 Deerfield Heights Association's water quality report?
As a community water system, Deerfield Heights Association 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 Winneshiek County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Decorah Water Department | Winneshiek | 7,615 | Community | Groundwater |
| Calmar Water Supply | Winneshiek | 1,125 | Community | Groundwater |
| Ossian Water Supply | Winneshiek | 802 | Community | Groundwater |
| Freeport Water District | Winneshiek | 775 | Community | Groundwater |
| The Country Express | Winneshiek | 515 | Transient non-community | Groundwater |
| Turkey Valley Community School | Winneshiek | 490 | 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, “Deerfield Heights Association, PWSID IA9630316, Iowa”, https://aquacensus.com/water-systems/iowa/deerfield-heights-association-ia9630316 (data as of October 1, 2026).