Public water system · IA0400900
ActiveRathbun Regional Water Assn (Rathbun)
At a glance
Rathbun Regional Water Assn (Rathbun) (PWSID IA0400900) is an active community water system serving Decatur, Wayne, Jefferson, Davis, Lucas and 3 more counties, Iowa. It reports serving 33,000 people through 13,190 service connections. Its primary water source is surface water, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2020.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
33,000
Service connections
13,190
Primary source
SW
Surface water
System type
CWS
Community water system
System record
How does Rathbun Regional Water Assn (Rathbun) compare with other water systems in Iowa?
By EPA's size categories, Rathbun Regional Water Assn (Rathbun) is a large system (10,001 to 100,000 people). 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 Rathbun Regional Water Assn (Rathbun) is about 4.9 times 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. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 24 Iowa systems (1.3%) list surface water as their primary source.
Who owns and regulates Rathbun Regional Water Assn (Rathbun)?
EPA lists Rathbun Regional Water Assn (Rathbun) 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.
Does Rathbun Regional Water Assn (Rathbun) have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2020. The violations listed here began between April 2020 and April 2020. By type: 12 monitoring and reporting. The contaminants or rules involved are Picloram, p-Dichlorobenzene, Di(2-ethylhexyl) adipate and Pentachlorophenol. EPA lists 12 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 |
|---|---|---|---|---|
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Picloramcode 2040 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Di(2-ethylhexyl) adipatecode 2035 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Pentachlorophenolcode 2326 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 2,4-Dcode 2105 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Alachlor (Lasso)code 2051 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2020-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
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.
Rathbun Regional Water Assn (Rathbun): frequently asked questions
Who runs Rathbun Regional Water Assn (Rathbun)?
Rathbun Regional Water Assn (Rathbun) (PWSID IA0400900) is a community water system privately owned. It is regulated by the IA state drinking water program.
How many people does Rathbun Regional Water Assn (Rathbun) serve?
Rathbun Regional Water Assn (Rathbun) reports serving 33,000 people through 13,190 service connections in Decatur, Wayne, Jefferson, Davis, Lucas and 3 more counties, Iowa.
Where does Rathbun Regional Water Assn (Rathbun) get its water?
EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.
Does Rathbun Regional Water Assn (Rathbun) have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2020. 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 Rathbun Regional Water Assn (Rathbun)'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, none is health-based, and the most recent began in April 2020. For current results, consult the system's annual water quality report, EPA ECHO, or the IA state drinking water program.
Where can I find Rathbun Regional Water Assn (Rathbun)'s water quality report?
As a community water system, Rathbun Regional Water Assn (Rathbun) 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 Decatur County(the first county EPA lists for this system)
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lamoni Municipal Utilities | Decatur | 2,029 | Community | Surface water |
| Leon Water Supply | Decatur | 1,830 | Community | Surface water |
| Sirwa #3 (Leon) | Decatur | 1,373 | Community | Purchased surface water |
| Garden Grove Water Supply | Decatur | 179 | Community | Purchased surface water |
Related pages
- All water systems in Decatur County· 5 active
- All water systems in Wayne County· 5 active
- All water systems in Jefferson County· 8 active
- All water systems in Van Buren County· 7 active
- All Iowa public water systems· 1,828 active
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
- What a drinking water violation notice means
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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, “Rathbun Regional Water Assn (Rathbun), PWSID IA0400900, Iowa”, https://aquacensus.com/water-systems/iowa/rathbun-regional-water-assn-rathbun-ia0400900 (data as of October 1, 2026).