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Louisa County, Iowa — public water systems

At a glance

22 active public water systems are filed under Louisa County, Iowa in EPA's SDWIS records, together reporting 9,731 people served. The largest is Wapello Municipal Water Works, which reports serving 2,096 people. 8 are community water systems serving people where they live; the other 14 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

22

Population served

9.7K

Community systems

8

Groundwater share

100%

How does Louisa County compare with other Iowa counties?

Louisa County has the 25th-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 9,731 people served in total, the 66th-largest county figure in the state and 0.3% of the statewide total. The average system here reports serving 442 people, well 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 Louisa County's drinking water come from?

By primary water source, Louisa County's active systems draw on groundwater (21, 95%) and purchased groundwater (1, 4.5%). 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, Wapello Municipal Water Works, draws primarily on groundwater.

What kinds of water systems operate in Louisa County?

Louisa County's active systems break down as 8 community systems (36%), 2 non-transient non-community systems (9.1%) and 12 transient non-community systems (55%). 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 private (59%), local government (36%) and public/private partnership (4.5%).

Water systems in Louisa County

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Active public water systems in Louisa County, Iowa
#Water systemCountyPopulation servedTypeSource
1Wapello Municipal Water WorksLouisa2,096CommunityGroundwater
2Columbus Junction Water SupplyLouisa1,830CommunityGroundwater
3Tyson Fresh Meats Inc. (Columbus Jct)Louisa1,300Non-transient non-communityGroundwater
4Louisa-Muscatine Community SchoolLouisa1,190Non-transient non-communityGroundwater
5Morning Sun Water DepartmentLouisa752CommunityGroundwater
6Caseys #3449Louisa715Transient non-communityGroundwater
7Grandview Muni Water DeptLouisa437CommunityGroundwater
8Columbus City Public Water SupplyLouisa392CommunityPurchased groundwater
9Oakville Water SupplyLouisa200CommunityGroundwater
10Cedarcrest Golf & Country ClubLouisa146Transient non-communityGroundwater
11Ship'S PlaceLouisa136Transient non-communityGroundwater
12Woodland Wapello Mobile Home ParkLouisa126CommunityGroundwater
13Cotter Outback LLCLouisa72Transient non-communityGroundwater
14Deese Thirsty CamelLouisa67Transient non-communityGroundwater
15Heritage Oaks Golf & Country ClubLouisa60Transient non-communityGroundwater
16Louisa Co Law Enforcement CtrLouisa46CommunityGroundwater
17Lake Odessa Cabin Owners Assoc.Louisa31Transient non-communityGroundwater
18Wiele MotorLouisa31Transient non-communityGroundwater
19Letts Community BuildingLouisa27Transient non-communityGroundwater
20Whispering Maples CampgroundLouisa27Transient non-communityGroundwater
21Odessa DellsLouisa25Transient non-communityGroundwater
22Natural Gas Pipeline Station # 204Louisa25Transient non-communityGroundwater

Louisa County water systems: frequently asked questions

How many public water systems are in Louisa County, Iowa?

EPA's SDWIS records file 22 active public water systems under Louisa County, Iowa: 8 community systems (36%), 2 non-transient non-community systems (9.1%) and 12 transient non-community systems (55%).

Who supplies drinking water in Louisa County, IA?

The largest community water systems filed under Louisa County are Wapello Municipal Water Works (2,096 people served), Columbus Junction Water Supply (1,830 people served) and Morning Sun Water Department (752 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 Louisa County's drinking water come from groundwater or surface water?

Of the 22 active public water systems in Louisa County, all draw mainly on groundwater and none on surface water, counting purchased supplies. The largest system, Wapello Municipal Water Works, uses groundwater.

Where can I find a water quality report for Louisa 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 Louisa 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 Louisa 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 Louisa County, Iowa”, https://aquacensus.com/water-systems/iowa/louisa (data as of October 1, 2026).