Public water system · IA3100608
ActiveLost Canyon MHP (Peosta)
At a glance
Lost Canyon MHP (Peosta) (PWSID IA3100608) is an active community water system in Dubuque County, Iowa. It reports serving 97 people through 62 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, 2 are health-based, and the most recent began in August 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
97
Service connections
62
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Lost Canyon MHP (Peosta) compare with other water systems in Dubuque County?
By EPA's size categories, Lost Canyon MHP (Peosta) 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 0.1% 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 Lost Canyon MHP (Peosta) 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 Lost Canyon MHP (Peosta)?
EPA lists Lost Canyon MHP (Peosta) 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 Lost Canyon MHP (Peosta) have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2023. The violations listed here began between September 1980 and August 2023. By type: 10 monitoring and reporting and 2 contaminant level above the legal limit. The contaminant or rule involved most often is Haloacetic acids (HAA5) (3 of them). EPA lists 8 as resolved and 4 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 |
|---|---|---|---|---|
| 2023-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2023-08-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2017-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2009-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Archived |
| 2005-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
| 2003-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Acute (TCR) · code 21 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2003-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 1993-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1988-07-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1980-09-30 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Archived |
| 1980-09-30 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Archived |
| 1980-09-30 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Archived |
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.
Lost Canyon MHP (Peosta): frequently asked questions
Who runs Lost Canyon MHP (Peosta)?
Lost Canyon MHP (Peosta) (PWSID IA3100608) is a community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Lost Canyon MHP (Peosta) serve?
Lost Canyon MHP (Peosta) reports serving 97 people through 62 service connections in Dubuque County, Iowa.
Where does Lost Canyon MHP (Peosta) 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 Lost Canyon MHP (Peosta) have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in August 2023. 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 Lost Canyon MHP (Peosta)'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, 2 are health-based, and the most recent began in August 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Lost Canyon MHP (Peosta)'s water quality report?
As a community water system, Lost Canyon MHP (Peosta) 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, “Lost Canyon MHP (Peosta), PWSID IA3100608, Iowa”, https://aquacensus.com/water-systems/iowa/lost-canyon-mhp-peosta-ia3100608 (data as of October 1, 2026).