Marion

Community water system in Williamson County, Illinois, drawing primarily on purchased surface water.

Dataset updated July 2026 . Source: EPA SDWIS/ECHO public records.

Population served

16,855

Service connections

9,812

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDIL1990550

System typeCommunity water system

Activity statusActive

Population served16,855

Service connections9,812

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyIL state drinking water program

City servedMarion

StateIllinois

ZIP—

CountyWilliamson County →

Violations & enforcement

Began	Violation	Contaminant	Health-based	Status
2013-08-01	24	3100	No	Resolved
2013-07-01	27	1006	No	Resolved
2011-08-01	38	0300	No	Archived
2011-08-01	36	0200	No	Archived
2011-07-01	71	7000	No	Resolved
2011-07-01	27	2920	No	Archived
2003-04-01	27	2920	No	Resolved
2003-01-01	27	2920	No	Resolved
2002-06-01	44	0300	Yes	Resolved
1997-04-01	22	3100	Yes	Archived
1988-04-01	04	1020	No	Archived
1988-04-01	04	1015	No	Archived

Marion: frequently asked questions

Is Marion's water safe to drink?

Marion is an active community water system regulated under the Safe Drinking Water Act, overseen by the IL state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.

Who runs Marion?

Marion (PWSID IL1990550) is a local government-owned community water system, regulated by the IL state drinking water program.

How many people does Marion serve?

Marion reports serving 16,855 people through 9,812 service connections in Williamson County, Illinois.

Where does Marion get its water?

EPA SDWIS lists this system's primary water source as purchased surface water.

Other water systems in Williamson County

Water system	County	Population served	Type	Source
City of Georgetown	Williamson	191,639	Community	Surface water
City of Round Rock	Williamson	130,662	Community	Surface water
City of Leander	Williamson	98,330	Community	Surface water
City of Cedar Park	Williamson	86,939	Community	Surface water
Franklin Water Dept	Williamson	77,222	Community	Surface water
H.B.& T.S. Utility District	Williamson	40,094	Community	Purchased surface water