Public water system · IA0915030
ActiveDenver Water Supply
At a glance
Denver Water Supply (PWSID IA0915030) is an active community water system in Bremer County, Iowa. It reports serving 1,919 people through 867 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; 2 are health-based, and the most recent began in April 2001.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,919
Service connections
867
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Denver Water Supply compare with other water systems in Bremer County?
By EPA's size categories, Denver Water Supply is a small system (501 to 3,300 people). Bremer County has 16 active public water systems, and Denver Water Supply is the 4th-largest of them by population served. Its population served is about half of the county average of 3,535 people per system, and accounts for 3.4% of the 56,553 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 Denver 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 Denver Water Supply?
EPA lists Denver 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. 10 of the 16 active systems in Bremer County (63%) are also owned by a local government.
Does Denver Water Supply have drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in April 2001. The violations listed here began between June 1999 and April 2001. By type: 2 contaminant level above the legal limit and 1 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (2 of them). 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 |
|---|---|---|---|---|
| 2001-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 1999-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1999-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Denver Water Supply: frequently asked questions
Who runs Denver Water Supply?
Denver Water Supply (PWSID IA0915030) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Denver Water Supply serve?
Denver Water Supply reports serving 1,919 people through 867 service connections in Bremer County, Iowa.
Where does Denver 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 Denver Water Supply have any drinking water violations?
EPA's records list 3 violations for this system; 2 are health-based, and the most recent began in April 2001. 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 Denver 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; 2 are health-based, and the most recent began in April 2001. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Denver Water Supply's water quality report?
As a community water system, Denver 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 Bremer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ia Regional Utilities Assoc (Waverly) | Bremer + 7 more | 37,820 | Community | Groundwater |
| Waverly Water Department | Bremer | 10,394 | Community | Groundwater |
| Sumner Water Supply | Bremer | 2,030 | Community | Groundwater |
| Tripoli Water Supply | Bremer | 1,191 | Community | Groundwater |
| Janesville Water Supply | Bremer | 1,034 | Community | Purchased groundwater |
| Readlyn Water Supply | Bremer | 845 | 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, “Denver Water Supply, PWSID IA0915030, Iowa”, https://aquacensus.com/water-systems/iowa/denver-water-supply-ia0915030 (data as of October 1, 2026).