Public water system · IA6115097
ActiveEarlham Municipal Waterworks
At a glance
Earlham Municipal Waterworks (PWSID IA6115097) is an active community water system in Madison County, Iowa. It reports serving 1,446 people through 520 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 1990.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,446
Service connections
520
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Earlham Municipal Waterworks compare with other water systems in Madison County?
By EPA's size categories, Earlham Municipal Waterworks is a small system (501 to 3,300 people). Madison County has 4 active public water systems, and Earlham Municipal Waterworks is the 3rd-largest of them by population served. Its population served is well below the county average of 7,048 people per system, and accounts for 5.1% of the 28,192 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 Earlham 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 119 Iowa systems (6.5%) list purchased surface water as their primary source.
Who owns and regulates Earlham Municipal Waterworks?
EPA lists Earlham 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. 3 of the 4 active systems in Madison County (75%) are also owned by a local government.
Does Earlham Municipal Waterworks have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 1990. The violations listed here began between October 1984 and October 1990. By type: 9 monitoring and reporting and 3 contaminant level above the legal limit. The contaminant or rule involved most often is Fluoride (2 of them). EPA lists 9 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 |
|---|---|---|---|---|
| 1990-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1989-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Resolved |
| 1988-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Resolved |
| 1985-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | Archived |
| 1984-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Fluoridecode 1025 | Yes | Archived |
| 1984-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Combined Radium (-226 and -228)code 4010 | Yes | 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.
Earlham Municipal Waterworks: frequently asked questions
Who runs Earlham Municipal Waterworks?
Earlham Municipal Waterworks (PWSID IA6115097) is a community water system owned by a local government. It is regulated by the IA state drinking water program.
How many people does Earlham Municipal Waterworks serve?
Earlham Municipal Waterworks reports serving 1,446 people through 520 service connections in Madison County, Iowa.
Where does Earlham Municipal Waterworks get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Earlham Municipal Waterworks have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 1990. 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 Earlham 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. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 1990. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Earlham Municipal Waterworks' water quality report?
As a community water system, Earlham 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 Madison County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Sirwa #2 (Creston) | Madison + 7 more | 20,793 | Community | Surface water |
| Winterset Municipal Waterworks | Madison | 5,428 | Community | Surface water |
| Truro Waterworks | Madison | 525 | Community | Purchased 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, “Earlham Municipal Waterworks, PWSID IA6115097, Iowa”, https://aquacensus.com/water-systems/iowa/earlham-municipal-waterworks-ia6115097 (data as of October 1, 2026).