Public water system · IL0510350

Active

Vandalia

At a glance

Vandalia (PWSID IL0510350) is an active community water system in Fayette County, Illinois. It reports serving 7,616 people through 2,620 service connections. Its primary water source is surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025.

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

Population served

7,616

Service connections

2,620

Primary source

Surface water

System type

CWS

Community water system

System record

PWSIDIL0510350

System typeCommunity water system

Activity statusActive

Population served7,616

Service connections2,620

Primary water sourceSurface water

Owner typeLocal government

Primacy agencyIL state drinking water program

City servedVandalia

StateIllinois

ZIP—

CountyFayette County

How does Vandalia compare with other water systems in Fayette County?

By EPA's size categories, Vandalia is a medium system (3,301 to 10,000 people). Fayette County has 11 active public water systems, and Vandalia is the largest of them by population served. Its population served is about 4.6 times the county average of 1,654 people per system, and accounts for 42% of the 18,196 people reported by systems filed under the county. Across Illinois, the 3,872 active systems average 3,204 people each. Nationally, the average active community water system reports serving 6,703 people, so Vandalia is about 14% above that figure.

What does “community water system” mean?

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. Illinois has 1,773 active community water systems, 46% of the state's 3,872 active systems. Surface water means the system draws its water from rivers, lakes, streams or reservoirs. 89 Illinois systems (2.3%) list surface water as their primary source.

Who owns and regulates Vandalia?

EPA lists Vandalia as owned by a local government. The IL state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 6 of the 11 active systems in Fayette County (55%) are also owned by a local government.

Does Vandalia have drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025. The violations listed here began between May 1995 and July 2025. By type: 7 monitoring and reporting, 2 contaminant level above the legal limit, 2 public notice, recordkeeping or other and 1 reporting. The contaminant or rule involved most often is Haloacetic acids (HAA5) (2 of them). EPA lists 10 as resolved, 1 as unaddressed and 1 as archived. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.

Began	Violation	Contaminant or rule	Health-based	Status
2025-07-02	ReportingNotification, Known or Potential LSL · code 4H	Lead and Copper Rule Revisionscode 5200	No	Unaddressed
2025-07-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2024-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Haloacetic acids (HAA5)code 2456	Yes	Resolved
2024-02-08	Monitoring and reportingFailure Submit IDSE/Subpart V Plan Rpt · code 35	Haloacetic acids (HAA5)code 2456	No	Resolved
2023-04-01	Monitoring and reportingMonitoring, Regular · code 03	Toxaphenecode 2020	No	Resolved
2019-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Carbon, totalcode 2920	No	Archived
2018-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2006-08-16	Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72	Consumer Confidence Rulecode 7000	No	Resolved
2005-01-01	Monitoring and reportingMonitoring, Turbidity (Enhanced SWTR) · code 38	Interim Enhanced Surface Water Treatment Rulecode 0300	No	Resolved
1999-08-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
1997-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22	Total coliform bacteria (TCR)code 3100	Yes	Resolved
1995-05-01	Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36	Surface Water Treatment Rulecode 0200	No	Resolved

The 12 most recent violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.

Vandalia: frequently asked questions

Who runs Vandalia?

Vandalia (PWSID IL0510350) is a community water system owned by a local government. It is regulated by the IL state drinking water program.

How many people does Vandalia serve?

Vandalia reports serving 7,616 people through 2,620 service connections in Fayette County, Illinois.

Where does Vandalia get its water?

EPA SDWIS lists this system's primary water source as surface water. Surface water means the system draws its water from rivers, lakes, streams or reservoirs.

Does Vandalia have any drinking water violations?

Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.

Is Vandalia's water safe to drink?

AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in July 2025. For current results, consult the system's annual water quality report, EPA ECHO, or the IL state drinking water program.

Where can I find Vandalia's water quality report?

As a community water system, Vandalia must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.

Other water systems in Fayette County

Water system	County	Population served	Type	Source
Fayette Water Company	Fayette	5,608	Community	Purchased surface water
St Elmo	Fayette	1,272	Community	Purchased surface water
Ramsey	Fayette	966	Community	Purchased groundwater
Brownstown	Fayette	740	Community	Purchased groundwater
Vandalia Correctional Center	Fayette	700	Community	Purchased surface water
Farina	Fayette	540	Community	Purchased surface water

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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, “Vandalia, PWSID IL0510350, Illinois”, https://aquacensus.com/water-systems/illinois/vandalia-il0510350 (data as of October 1, 2026).