Butler County, Iowa — public water systems
At a glance
16 active public water systems are filed under Butler County, Iowa in EPA's SDWIS records, together reporting 9,368 people served. The largest is Parkersburg Water Supply, which reports serving 2,019 people. 9 are community water systems serving people where they live; the other 7 are non-community systems, such as schools, workplaces, campgrounds and gas stations with their own supply.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
16
Population served
9.4K
Community systems
9
Groundwater share
100%
How does Butler County compare with other Iowa counties?
Butler County has the 39th-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 9,368 people served in total, the 69th-largest county figure in the state and 0.3% of the statewide total. The average system here reports serving 586 people, about 66% below 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 Butler County's drinking water come from?
By primary water source, Butler County's active systems draw on groundwater (16, 100%). Overall, all rely mainly on groundwater (including purchased groundwater) and none on surface water, compared with 92% and 7.8% across Iowa. Groundwater means the system draws its water from wells or springs fed by underground aquifers. The county's largest system, Parkersburg Water Supply, draws primarily on groundwater.
What kinds of water systems operate in Butler County?
Butler County's active systems break down as 9 community systems (56%), 1 non-transient non-community systems (6.3%) and 6 transient non-community systems (38%). 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. A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. EPA lists their owner types as local government (56%) and private (44%).
Water systems in Butler County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Parkersburg Water Supply | Butler | 2,019 | Community | Groundwater |
| 2 | Shell Rock Muni Water Supp | Butler | 1,269 | Community | Groundwater |
| 3 | Clarksville Water Supply | Butler | 1,254 | Community | Groundwater |
| 4 | Aplington Water Supply | Butler | 1,126 | Community | Groundwater |
| 5 | Greene Muni Water Supply | Butler | 994 | Community | Groundwater |
| 6 | Allison Water Supply | Butler | 966 | Community | Groundwater |
| 7 | Dumont Water Supply | Butler | 635 | Community | Groundwater |
| 8 | New Hartford Water Supply | Butler | 570 | Community | Groundwater |
| 9 | Bristow Muni Water Supply | Butler | 145 | Community | Groundwater |
| 10 | Round Grove Golf & Country Club | Butler | 87 | Transient non-community | Groundwater |
| 11 | Ne Iowa Christian Service Camp | Butler | 75 | Transient non-community | Groundwater |
| 12 | Poet Biorefining-Shell Rock LLC | Butler | 70 | Non-transient non-community | Groundwater |
| 13 | St Johns Lutheran Church | Butler | 52 | Transient non-community | Groundwater |
| 14 | Card, Inc.. | Butler | 50 | Transient non-community | Groundwater |
| 15 | Back Roads Bar & Grill | Butler | 31 | Transient non-community | Groundwater |
| 16 | Beaver Meadows Country Club | Butler | 25 | Transient non-community | Groundwater |
Also serving Butler County
These systems serve several counties, including Butler 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 |
Butler County water systems: frequently asked questions
How many public water systems are in Butler County, Iowa?
EPA's SDWIS records file 16 active public water systems under Butler County, Iowa: 9 community systems (56%), 1 non-transient non-community systems (6.3%) and 6 transient non-community systems (38%). At least 1 more system is listed under another county but also serve Butler County.
Who supplies drinking water in Butler County, IA?
The largest community water systems filed under Butler County are Parkersburg Water Supply (2,019 people served), Shell Rock Muni Water Supp (1,269 people served) and Clarksville Water Supply (1,254 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 Butler County's drinking water come from groundwater or surface water?
Of the 16 active public water systems in Butler County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Parkersburg Water Supply, uses groundwater.
Where can I find a water quality report for Butler 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. 9 community systems are filed under Butler 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 Butler 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
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 Butler County, Iowa”, https://aquacensus.com/water-systems/iowa/butler (data as of October 1, 2026).