Marshall County, Iowa — public water systems
At a glance
12 active public water systems are filed under Marshall County, Iowa in EPA's SDWIS records, together reporting 33,628 people served. The largest is Marshalltown Water Works, which reports serving 27,680 people. All 12 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
12
Population served
33.6K
Community systems
12
Groundwater share
100%
How does Marshall County compare with other Iowa counties?
Marshall County has the 62nd-most active public water systems among the 114 counties listed for active Iowa systems in EPA records; among the 96 with 3 or more systems, the median has 14. Its systems report 33,628 people served in total, the 21st-largest county figure in the state and 1.1% of the statewide total. The average system here reports serving 2,802 people, about 63% above the Iowa average of 1,718. Population figures are what each system reports; people served by more than one system, such as a wholesaler and the town that buys from it, are counted by each.
Where does Marshall County's drinking water come from?
By primary water source, Marshall County's active systems draw on purchased groundwater (8, 67%) and groundwater (4, 33%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 92% and 7.8% across Iowa. Purchased groundwater means the system buys groundwater from another public water system rather than drawing its own. The county's largest system, Marshalltown Water Works, draws primarily on groundwater.
What kinds of water systems operate in Marshall County?
Marshall County's active systems break down as 12 community systems (100%). 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. EPA lists their owner types as local government (83%) and private (17%).
Water systems in Marshall County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Marshalltown Water Works | Marshall | 27,680 | Community | Groundwater |
| 2 | State Center Muni Water Dept | Marshall | 1,411 | Community | Groundwater |
| 3 | Le Grand Water Works | Marshall | 910 | Community | Purchased groundwater |
| 4 | Melbourne Water Supply | Marshall | 765 | Community | Purchased groundwater |
| 5 | Gilman Water Supply | Marshall | 582 | Community | Purchased groundwater |
| 6 | Sunset Village | Marshall | 528 | Community | Purchased groundwater |
| 7 | Albion Water Department | Marshall | 448 | Community | Groundwater |
| 8 | Marshalltown Estates | Marshall | 382 | Community | Groundwater |
| 9 | Liscomb Water Supply | Marshall | 291 | Community | Purchased groundwater |
| 10 | Rhodes Water Supply | Marshall | 271 | Community | Purchased groundwater |
| 11 | Laurel Municipal Water Works | Marshall | 220 | Community | Purchased groundwater |
| 12 | Clemons Water Supply | Marshall | 140 | Community | Purchased groundwater |
Also serving Marshall County
These systems serve several counties, including Marshall County. EPA lists another county first for them, so they are not included in the counts above.
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ia Regional Utilities Assoc (Waverly) | Bremer + 7 more | 37,820 | Community | Groundwater |
Marshall County water systems: frequently asked questions
How many public water systems are in Marshall County, Iowa?
EPA's SDWIS records file 12 active public water systems under Marshall County, Iowa: 12 community systems (100%). At least 1 more system is listed under another county but also serve Marshall County.
Who supplies drinking water in Marshall County, IA?
The largest community water systems filed under Marshall County are Marshalltown Water Works (27,680 people served), State Center Muni Water Dept (1,411 people served) and Le Grand Water Works (910 people served). Which system serves a particular address depends on its service area, which EPA's SDWIS records do not include; a water bill or the local utility can confirm it.
Does Marshall County's drinking water come from groundwater or surface water?
Of the 12 active public water systems in Marshall County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Marshalltown Water Works, uses groundwater.
Where can I find a water quality report for Marshall County?
Each community water system must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1, covering the previous calendar year. 12 community systems are filed under Marshall County, so the report to look for is the one from the system that supplies your address.
How can I check violations for a water system in Marshall County?
Open the system's profile from the list on this page. Each profile shows the most recent Safe Drinking Water Act violations in EPA's records, with plain-English labels and whether each one is resolved. For current compliance status, EPA ECHO is the primary source.
More Iowa water systems
- All Iowa public water systems· 1,828 active
- Cherokee County· 12 systems
- Emmet County· 12 systems
- Keokuk County· 12 systems
- Lyon County· 12 systems
- Pocahontas County· 12 systems
- Des Moines County· 11 systems
- How to find out who supplies your drinking water
- How to find and read your annual water quality report
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, “Public water systems in Marshall County, Iowa”, https://aquacensus.com/water-systems/iowa/marshall (data as of October 1, 2026).