Public water system · IA3170335
ActiveThunder Hills Home & Utility Assoc.
At a glance
Thunder Hills Home & Utility Assoc. (PWSID IA3170335) is an active community water system in Dubuque County, Iowa. It reports serving 300 people through 92 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 July 2005.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
92
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Thunder Hills Home & Utility Assoc. compare with other water systems in Dubuque County?
By EPA's size categories, Thunder Hills Home & Utility Assoc. is a very small system (500 people or fewer). Dubuque County has 74 active public water systems. Its population served is well below the county average of 1,255 people per system, and accounts for 0.3% of the 92,853 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 Thunder Hills Home & Utility Assoc. 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 Thunder Hills Home & Utility Assoc.?
EPA lists Thunder Hills Home & Utility Assoc. 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. 49 of the 74 active systems in Dubuque County (66%) are also privately owned.
Does Thunder Hills Home & Utility Assoc. have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in July 2005. The violations listed here began between July 1988 and July 2005. By type: 11 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 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 |
|---|---|---|---|---|
| 2005-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2002-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-11-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1992-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1991-04-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | 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.
Thunder Hills Home & Utility Assoc.: frequently asked questions
Who runs Thunder Hills Home & Utility Assoc.?
Thunder Hills Home & Utility Assoc. (PWSID IA3170335) is a community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Thunder Hills Home & Utility Assoc. serve?
Thunder Hills Home & Utility Assoc. reports serving 300 people through 92 service connections in Dubuque County, Iowa.
Where does Thunder Hills Home & Utility Assoc. 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 Thunder Hills Home & Utility Assoc. 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 July 2005. 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 Thunder Hills Home & Utility Assoc.'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 July 2005. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Thunder Hills Home & Utility Assoc.'s water quality report?
As a community water system, Thunder Hills Home & Utility Assoc. 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 Dubuque County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Dubuque Water Works | Dubuque | 59,667 | Community | Groundwater |
| Asbury Municipal Water System | Dubuque | 5,943 | Community | Groundwater |
| Dyersville Municipal Water Co | Dubuque | 4,477 | Community | Groundwater |
| John Deere Dubuque Works | Dubuque | 3,000 | Non-transient non-community | Groundwater |
| Cascade Municipal Water Supply | Dubuque | 2,386 | Community | Groundwater |
| Peosta Water Supply | Dubuque | 2,278 | 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, “Thunder Hills Home & Utility Assoc., PWSID IA3170335, Iowa”, https://aquacensus.com/water-systems/iowa/thunder-hills-home-utility-assoc-ia3170335 (data as of October 1, 2026).