PlainWater
States → Illinois

Community Water System · PWS IL0870350

Vienna

Vienna, Illinois 62995 - drinking water served from surface water sources to 1,618 people, tracked in EPA SDWIS and UCMR5.

1,618
People served
458
EPA violations
45
Health-based
Untested
UCMR5 result

The verdict

EPA records 458 drinking-water violations at Vienna, 10% of them health-based - above the Illinois per-system average.

458
Total EPA violations on record
10%
Health-based (MCL / treatment failure)
1,618
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Vienna

Vienna is a local-owned community water system that delivers drinking water to 1,618 residents in Vienna, Illinois (Johnson County) through 740 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 458 total violations for this system , of which 45 (10%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 380 monitoring and reporting violations are on file. The most recent violation on record dates to 2018.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 70 violations (MR). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Illinois, EPA tracks 5,117 public water systems serving 12,576,876 people, with 355,322 cumulative violations and 52,932 health-based violations on record. About 81% of systems in the state carry at least one violation, and state-wide the average per system is 69.4 violations. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Vienna's 458 violations sit above the Illinois average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
1,618
Total Violations
458
Health-Based Violations
45
Water Source
Surface Water

System Details

System Type
Community
Owner Type
Local
Connections
740
County
Johnson
School/Daycare
No
MCL Violations
8
Monitoring Violations
380
Treatment Tech Violations
37

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 70 2011
Surface Water Treatment Rule MR 40 1994
Surface Water Treatment Rule TT 20 1994
CARBON, TOTAL TT 17 2018
1,2-Dichloroethane MR 13 1993
Carbon tetrachloride MR 13 1993
Trichloroethylene MR 13 1993
cis-1,2-Dichloroethylene MR 11 1993
o-Dichlorobenzene MR 11 1993
1,1-Dichloroethylene MR 11 1993
CHLOROBENZENE MR 11 1993
Toluene MR 11 1993
Styrene MR 11 1993
Xylenes, Total MR 7 1993
p-Dichlorobenzene MR 7 1993
trans-1,2-Dichloroethylene MR 7 1993
1,1,1-Trichloroethane MR 7 1993
1,2-Dichloropropane MR 7 1993
Ethylbenzene MR 7 1993
Benzene MR 7 1993
Tetrachloroethylene MR 7 1993
Chlorine MR 6 2011
TTHM MCL 6 2011
Nitrate MR 6 1993
Atrazine MR 3 1994
LASSO MR 3 1994
Heptachlor epoxide MR 3 1994
2,4-D MR 3 1994
2,4,5-TP MR 3 1994
Pentachlorophenol MR 3 1994

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Vienna.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID IL0870350 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Illinois Drinking Water Authority

Illinois EPA, Bureau of Water is the primacy agency that licenses and inspects Vienna under EPA-delegated authority.

Open IL regulator portal

Source: Illinois EPA, Bureau of Water

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2018 CARBON, TOTAL TT 17 SDWIS / IL0870350 / 2920
2017 Consumer Confidence Rule Other 2 SDWIS / IL0870350 / 7000
2011 Coliform (TCR) MR 70 SDWIS / IL0870350 / 3100
2011 Chlorine MR 6 SDWIS / IL0870350 / 0999
2011 TTHM MCL 6 SDWIS / IL0870350 / 2950
1994 Surface Water Treatment Rule MR 40 SDWIS / IL0870350 / 0200
1994 Surface Water Treatment Rule TT 20 SDWIS / IL0870350 / 0200
1994 Atrazine MR 3 SDWIS / IL0870350 / 2050
1994 LASSO MR 3 SDWIS / IL0870350 / 2051
1994 Heptachlor epoxide MR 3 SDWIS / IL0870350 / 2067
1994 2,4-D MR 3 SDWIS / IL0870350 / 2105
1994 2,4,5-TP MR 3 SDWIS / IL0870350 / 2110
1994 Pentachlorophenol MR 3 SDWIS / IL0870350 / 2326
1994 Total Polychlorinated Biphenyls (PCB) MR 3 SDWIS / IL0870350 / 2383
1994 1,2-DIBROMO-3-CHLOROPROPANE MR 3 SDWIS / IL0870350 / 2931

How Vienna Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Vienna Illinois avg Federal benchmark
Total violations 458 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 45 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 1,618 2,458 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 5,117 regulated public water systems in Illinois.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Vienna water safe to drink? ▼
Vienna (PWS ID: IL0870350) has 458 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,618 people using Surface Water sources.
How many people does Vienna serve? ▼
Vienna serves 1,618 people in Vienna, Illinois. It is a Local-owned system using Surface Water water sources with 740 service connections.
What type of violations does Vienna have? ▼
Vienna has 458 total violations: 45 health-based violations (MCL exceedances or treatment failures), 380 monitoring/reporting violations, and 37 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Vienna water? ▼
No PFAS testing data is available for Vienna under the EPA's UCMR5 monitoring program.
What water source does Vienna use? ▼
Vienna uses Surface Water as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.