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Macoupin County, Illinois — public water systems

At a glance

32 active public water systems are filed under Macoupin County, Illinois in EPA's SDWIS records, together reporting 45,161 people served. The largest is Carlinville, which reports serving 6,598 people. 30 are community water systems serving people where they live; the other 2 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

32

Population served

45.2K

Community systems

30

Groundwater share

3.1%

How does Macoupin County compare with other Illinois counties?

Macoupin County has the 34th-most active public water systems among the 149 counties listed for active Illinois systems in EPA records; among the 104 with 3 or more systems, the median has 18. Its systems report 45,161 people served in total, the 28th-largest county figure in the state and 0.4% of the statewide total. The average system here reports serving 1,411 people, about 56% below the Illinois average of 3,204. 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 Macoupin County's drinking water come from?

By primary water source, Macoupin County's active systems draw on purchased surface water (26, 81%), surface water (5, 16%) and purchased groundwater (1, 3.1%). Overall, 3.1% rely mainly on groundwater (including purchased groundwater) and 97% on surface water, compared with 82% and 18% across Illinois. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. The county's largest system, Carlinville, draws primarily on surface water.

What kinds of water systems operate in Macoupin County?

Macoupin County's active systems break down as 30 community systems (94%) and 2 transient non-community systems (6.3%). 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 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 (88%) and private (13%).

Water systems in Macoupin County

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Active public water systems in Macoupin County, Illinois
#Water systemCountyPopulation servedTypeSource
1CarlinvilleMacoupin6,598CommunitySurface water
2StauntonMacoupin5,756CommunitySurface water
3BrightonMacoupin5,041CommunityPurchased surface water
4GillespieMacoupin3,737CommunitySurface water
5VirdenMacoupin3,274CommunityPurchased surface water
6Mount OliveMacoupin2,193CommunityPurchased surface water
7GirardMacoupin1,885CommunityPurchased surface water
8Central Macoupin County RwdMacoupin1,883CommunityPurchased surface water
9Bunker HillMacoupin1,760CommunityPurchased surface water
10BenldMacoupin1,612CommunityPurchased surface water
11NilwoodMacoupin1,394CommunityPurchased surface water
12Otter Lake Water CommissionMacoupin1,318CommunitySurface water
13Lake Williamson Christian CenterMacoupin1,250CommunityPurchased surface water
14South Palmyra Water CommissionMacoupin838CommunityPurchased surface water
15Kaho Public Water DistrictMacoupin785CommunityPurchased surface water
16Scottville Rural Water Company, Inc..Macoupin695CommunityPurchased surface water
17PalmyraMacoupin605CommunityPurchased surface water
18SawyervilleMacoupin578CommunityPurchased surface water
19ShipmanMacoupin541CommunityPurchased surface water
20DorchesterMacoupin540CommunityPurchased surface water
21WilsonvilleMacoupin536CommunityPurchased surface water
22White CityMacoupin485CommunityPurchased surface water
23MedoraMacoupin484CommunityPurchased surface water
24Mount ClareMacoupin311CommunityPurchased surface water
25Royal LakesMacoupin235CommunityPurchased surface water
26ChesterfieldMacoupin184CommunityPurchased surface water
27ModestoMacoupin182CommunityPurchased surface water
28HettickMacoupin174CommunityPurchased surface water
29EagarvilleMacoupin127CommunityPurchased surface water
30Palmyra-Modesto Water CommissionMacoupin110CommunitySurface water
31Magic Wand Car Wash BenldMacoupin25Transient non-communityPurchased surface water
32Twice the Ice CarlinvilleMacoupin25Transient non-communityPurchased groundwater

Macoupin County water systems: frequently asked questions

How many public water systems are in Macoupin County, Illinois?

EPA's SDWIS records file 32 active public water systems under Macoupin County, Illinois: 30 community systems (94%) and 2 transient non-community systems (6.3%).

Who supplies drinking water in Macoupin County, IL?

The largest community water systems filed under Macoupin County are Carlinville (6,598 people served), Staunton (5,756 people served) and Brighton (5,041 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 Macoupin County's drinking water come from groundwater or surface water?

Of the 32 active public water systems in Macoupin County, 3.1% draw mainly on groundwater and 97% on surface water, counting purchased supplies. The largest system, Carlinville, uses surface water.

Where can I find a water quality report for Macoupin 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. 30 community systems are filed under Macoupin 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 Macoupin 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 Illinois 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 Macoupin County, Illinois”, https://aquacensus.com/water-systems/illinois/macoupin (data as of October 1, 2026).