Warren County, Iowa — public water systems
At a glance
14 active public water systems are filed under Warren County, Iowa in EPA's SDWIS records, together reporting 57,488 people served. The largest is Warren Water District, which reports serving 20,095 people. All 14 are community water systems serving people where they live.
Dataset updated . Source: EPA SDWIS/ECHO, refreshed quarterly.
Active systems
14
Population served
57.5K
Community systems
14
Groundwater share
42.9%
How does Warren County compare with other Iowa counties?
Warren County has the 47th-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 57,488 people served in total, the 11th-largest county figure in the state and 1.8% of the statewide total. The average system here reports serving 4,106 people, about 139% 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 Warren County's drinking water come from?
By primary water source, Warren County's active systems draw on purchased surface water (8, 57%), purchased groundwater (4, 29%) and groundwater (2, 14%). Overall, 43% rely mainly on groundwater (including purchased groundwater) and 57% on surface water, compared with 92% and 7.8% across Iowa. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Warren Water District, draws primarily on purchased surface water.
What kinds of water systems operate in Warren County?
Warren County's active systems break down as 14 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 (57%) and private (43%).
Water systems in Warren County
🔒 Create a free account to export CSV| # | Water system | County | Population served | Type | Source |
|---|---|---|---|---|---|
| 1 | Warren Water District | Warren + 1 more | 20,095 | Community | Purchased surface water |
| 2 | Indianola Water Supply | Warren | 15,833 | Community | Groundwater |
| 3 | Norwalk Water Supply | Warren | 14,334 | Community | Purchased surface water |
| 4 | Carlisle Water Supply | Warren | 4,170 | Community | Groundwater |
| 5 | Milo Public Water Supply | Warren | 788 | Community | Purchased surface water |
| 6 | New Virginia Water Supply | Warren | 498 | Community | Purchased surface water |
| 7 | Martensdale Water Supply | Warren | 421 | Community | Purchased surface water |
| 8 | Lacona Water Supply | Warren | 361 | Community | Purchased groundwater |
| 9 | North American Mobile Home Park | Warren | 235 | Community | Purchased groundwater |
| 10 | Wilshire Hills Mhc | Warren | 216 | Community | Purchased surface water |
| 11 | Hartford Mhc LLC | Warren | 183 | Community | Purchased surface water |
| 12 | Indian Ridge Mobile Home Community | Warren | 153 | Community | Purchased groundwater |
| 13 | Saint Marys Water Corporation | Warren | 121 | Community | Purchased surface water |
| 14 | Sunfield Mobile Home Community | Warren | 80 | Community | Purchased groundwater |
Warren County water systems: frequently asked questions
How many public water systems are in Warren County, Iowa?
EPA's SDWIS records file 14 active public water systems under Warren County, Iowa: 14 community systems (100%).
Who supplies drinking water in Warren County, IA?
The largest community water systems filed under Warren County are Warren Water District (20,095 people served), Indianola Water Supply (15,833 people served) and Norwalk Water Supply (14,334 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 Warren County's drinking water come from groundwater or surface water?
Of the 14 active public water systems in Warren County, 43% draw mainly on groundwater and 57% on surface water, counting purchased supplies. The largest system, Warren Water District, uses purchased surface water.
Where can I find a water quality report for Warren 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. 14 community systems are filed under Warren 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 Warren 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 Warren County, Iowa”, https://aquacensus.com/water-systems/iowa/warren (data as of October 1, 2026).