Grundy County, Iowa — public water systems
At a glance
8 active public water systems are filed under Grundy County, Iowa in EPA's SDWIS records, together reporting 8,205 people served. The largest is Grundy Center Water Supply, which reports serving 2,796 people. All 8 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
8
Population served
8.2K
Community systems
8
Groundwater share
100%
How does Grundy County compare with other Iowa counties?
Grundy County has the 72nd-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 8,205 people served in total, the 73rd-largest county figure in the state and 0.3% of the statewide total. The average system here reports serving 1,026 people, about 40% 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 Grundy County's drinking water come from?
By primary water source, Grundy County's active systems draw on purchased groundwater (6, 75%) and groundwater (2, 25%). 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, Grundy Center Water Supply, draws primarily on purchased groundwater.
What kinds of water systems operate in Grundy County?
Grundy County's active systems break down as 8 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 (100%).
Water systems in Grundy County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Grundy Center Water Supply | Grundy | 2,796 | Community | Purchased groundwater |
| 2 | Reinbeck Water Supply | Grundy | 1,662 | Community | Groundwater |
| 3 | Dike Water Supply | Grundy | 1,306 | Community | Purchased groundwater |
| 4 | Conrad Water Supply | Grundy | 1,098 | Community | Purchased groundwater |
| 5 | Wellsburg Water Supply | Grundy | 721 | Community | Purchased groundwater |
| 6 | Holland Water Supply | Grundy | 270 | Community | Purchased groundwater |
| 7 | Stout Water Supply | Grundy | 191 | Community | Groundwater |
| 8 | Beaman Water Supply | Grundy | 161 | Community | Purchased groundwater |
Also serving Grundy County
These systems serve several counties, including Grundy 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 |
Grundy County water systems: frequently asked questions
How many public water systems are in Grundy County, Iowa?
EPA's SDWIS records file 8 active public water systems under Grundy County, Iowa: 8 community systems (100%). At least 1 more system is listed under another county but also serve Grundy County.
Who supplies drinking water in Grundy County, IA?
The largest community water systems filed under Grundy County are Grundy Center Water Supply (2,796 people served), Reinbeck Water Supply (1,662 people served) and Dike Water Supply (1,306 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 Grundy County's drinking water come from groundwater or surface water?
Of the 8 active public water systems in Grundy County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Grundy Center Water Supply, uses purchased groundwater.
Where can I find a water quality report for Grundy 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. 8 community systems are filed under Grundy 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 Grundy 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 Grundy County, Iowa”, https://aquacensus.com/water-systems/iowa/grundy (data as of October 1, 2026).