Public water system · IA3080016
ActiveTerril Municipal Waterworks
At a glance
Terril Municipal Waterworks (PWSID IA3080016) is an active community water system in Dickinson County, Iowa. It reports serving 334 people through 201 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
334
Service connections
201
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Terril Municipal Waterworks compare with other water systems in Dickinson County?
By EPA's size categories, Terril Municipal Waterworks is a very small system (500 people or fewer). Dickinson County has 14 active public water systems. Its population served is well below the county average of 1,028 people per system, and accounts for 2.3% of the 14,395 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 Terril Municipal Waterworks 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 Terril Municipal Waterworks?
EPA lists Terril Municipal Waterworks 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. 10 of the 14 active systems in Dickinson County (71%) are also owned by a local government.
Does Terril Municipal Waterworks have drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in August 2025. The violations listed here began between July 1993 and August 2025. By type: 5 monitoring and reporting, 2 monitoring and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (5 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 2025-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-12-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2010-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 1998-08-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
All 9 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.
Terril Municipal Waterworks: frequently asked questions
Who runs Terril Municipal Waterworks?
Terril Municipal Waterworks (PWSID IA3080016) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Terril Municipal Waterworks serve?
Terril Municipal Waterworks reports serving 334 people through 201 service connections in Dickinson County, Iowa.
Where does Terril Municipal Waterworks 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 Terril Municipal Waterworks have any drinking water violations?
EPA's records list 9 violations for this system; 2 are health-based, and the most recent began in August 2025. 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 Terril Municipal Waterworks' 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 9 violations for this system; 2 are health-based, and the most recent began in August 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Terril Municipal Waterworks' water quality report?
As a community water system, Terril Municipal Waterworks 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 Dickinson County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Spirit Lake Waterworks | Dickinson | 6,167 | Community | Surface water |
| Milford Municipal Utilities | Dickinson | 3,431 | Community | Surface water |
| Lake Park Municipal Utilities | Dickinson | 1,167 | Community | Purchased groundwater |
| Arnolds Park Water Department | Dickinson | 1,113 | Community | Purchased surface water |
| Okoboji Water Supply | Dickinson | 776 | Community | Purchased surface water |
| Wahpeton Water Supply | Dickinson | 408 | Community | Surface water |
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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, “Terril Municipal Waterworks, PWSID IA3080016, Iowa”, https://aquacensus.com/water-systems/iowa/terril-municipal-waterworks-ia3080016 (data as of October 1, 2026).