Public water system · IA6300099
ActiveMelcher-Dallas Water Supply
At a glance
Melcher-Dallas Water Supply (PWSID IA6300099) is an active community water system in Marion County, Iowa. It reports serving 1,213 people through 621 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,213
Service connections
621
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Melcher-Dallas Water Supply compare with other water systems in Marion County?
By EPA's size categories, Melcher-Dallas Water Supply is a small system (501 to 3,300 people). Marion County has 13 active public water systems, and Melcher-Dallas Water Supply is the 5th-largest of them by population served. Its population served is about half of the county average of 2,325 people per system, and accounts for 4% of the 30,229 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 Melcher-Dallas 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 Melcher-Dallas Water Supply?
EPA lists Melcher-Dallas 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. 7 of the 13 active systems in Marion County (54%) are also owned by a local government.
Does Melcher-Dallas Water Supply have drinking water violations?
EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2016. The violations listed here began between November 1979 and October 2016. By type: 3 monitoring and reporting, 3 contaminant level above the legal limit and 1 monitoring. The contaminant or rule involved most often is Fluoride (3 of them). EPA lists 4 as resolved and 3 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 |
|---|---|---|---|---|
| 2016-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Resolved |
| 1994-10-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1994-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1984-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Fluoridecode 1025 | Yes | Archived |
| 1983-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Fluoridecode 1025 | Yes | Archived |
| 1979-11-26 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Fluoridecode 1025 | Yes | Archived |
All 7 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.
Melcher-Dallas Water Supply: frequently asked questions
Who runs Melcher-Dallas Water Supply?
Melcher-Dallas Water Supply (PWSID IA6300099) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Melcher-Dallas Water Supply serve?
Melcher-Dallas Water Supply reports serving 1,213 people through 621 service connections in Marion County, Iowa.
Where does Melcher-Dallas 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 Melcher-Dallas Water Supply have any drinking water violations?
EPA's records list 7 violations for this system; 3 are health-based, and the most recent began in October 2016. 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 Melcher-Dallas 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 7 violations for this system; 3 are health-based, and the most recent began in October 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Melcher-Dallas Water Supply's water quality report?
As a community water system, Melcher-Dallas 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 Marion County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pella Water Works Department | Marion | 11,052 | Community | Groundwater |
| Knoxville Water Works | Marion | 8,400 | Community | Groundwater |
| Marion Co. Rural Water District | Marion | 5,687 | Community | Purchased groundwater |
| Pleasantville Water Works | Marion | 1,676 | Community | Groundwater |
| Irua - Pershing Utilities | Marion | 488 | Community | Purchased groundwater |
| Bussey Water Supply | Marion | 427 | Community | Purchased 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, “Melcher-Dallas Water Supply, PWSID IA6300099, Iowa”, https://aquacensus.com/water-systems/iowa/melcher-dallas-water-supply-ia6300099 (data as of October 1, 2026).