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ANTIOCH

PWS ID: IL0970050 · ANTIOCH, Illinois 60002

ANTIOCH serves 14,175 people in ANTIOCH, Illinois using Groundwater water sources. It has 115 recorded EPA violations, including 16 health-based violations. PFAS "forever chemicals" were detected in UCMR5 testing (1 compound found).

Water Quality Snapshot: ANTIOCH

ANTIOCH is a local-owned community water system that delivers drinking water to 14,175 residents in ANTIOCH, Illinois (Lake County) through 4,598 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 115 total violations for this system , of which 16 (14%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 87 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 17 violations (MR). Under EPA's UCMR5 PFAS monitoring program, 1 PFAS compound was detected in samples collected from this system, with a maximum reported concentration of 13.4 ppt. PFAS are persistent synthetic chemicals linked to health effects at very low exposure levels.

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. ANTIOCH's 115 violations sit above the Illinois average. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%). All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

PFAS Detected

1 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.

Population Served
14,175
Total Violations
115
Health-Based Violations
16
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
4,598
County
Lake
School/Daycare
No
MCL Violations
3
Monitoring Violations
87
Treatment Tech Violations
13

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 17 2006
Lead and Copper Rule MR 13 2023
Lead and Copper Rule TT 13 2000
Public Notice Other 4 2008
BHC-GAMMA MR 3 1993
Toxaphene MR 3 1993
LASSO MR 3 1993
Heptachlor MR 3 1993
Heptachlor epoxide MR 3 1993
2,4-D MR 3 1993
Total Polychlorinated Biphenyls (PCB) MR 3 1993
1,2-DIBROMO-3-CHLOROPROPANE MR 3 1993
Chlordane MR 3 1993
Coliform (TCR) MCL 3 1995
Aldicarb sulfoxide MR 3 1993
Aldicarb MR 3 1993
Aldicarb sulfone MR 3 1993
ETHYLENE DIBROMIDE MR 3 1993
Methoxychlor MR 3 1993
Atrazine MR 3 1993
Carbofuran MR 3 1993
2,4,5-TP MR 3 1993
Pentachlorophenol MR 3 1993
Chlorine MR 2 2006
Gross Alpha, Excl. Radon and U MR 1 1977
Consumer Confidence Rule Other 1 2025

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 7 of 420 samples detected PFAS.

Contaminant Date Result MRL Status
lithium 5/15/2025 <9 µg/L 9 µg/L Not Detected
PFNA 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
6:2 FTS 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
ADONA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFUnA 5/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
9Cl-PF3ONS 5/15/2025 <0.002 µg/L 0.002 µg/L Not Detected
PFHpS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFBS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHpA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOS 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFDA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFDoA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFOA 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFBA 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
NMeFOSAA 5/15/2025 <0.006 µg/L 0.006 µg/L Not Detected
4:2 FTS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFEESA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
NFDHA 5/15/2025 <0.02 µg/L 0.02 µg/L Not Detected
PFPeS 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 5/15/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/15/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
HFPO-DA 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
11Cl-PF3OUdS 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFEESA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
6:2 FTS 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
4:2 FTS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
8:2 FTS 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFMPA 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFPeA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFMBA 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFPeS 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFTA 5/15/2025 <0.008 µg/L 0.008 µg/L Not Detected
PFTrDA 5/15/2025 <0.007 µg/L 0.007 µg/L Not Detected
NEtFOSAA 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBA 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
lithium 5/15/2025 <9 µg/L 9 µg/L Not Detected
NFDHA 5/15/2025 <0.02 µg/L 0.02 µg/L Not Detected
NMeFOSAA 5/15/2025 <0.006 µg/L 0.006 µg/L Not Detected
PFNA 5/15/2025 <0.004 µg/L 0.004 µg/L Not Detected
PFHpS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
HFPO-DA 5/15/2025 <0.005 µg/L 0.005 µg/L Not Detected
PFBS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected
PFHxS 5/15/2025 <0.003 µg/L 0.003 µg/L Not Detected

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 ANTIOCH.

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 IL0970050 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 ANTIOCH 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
2025 Consumer Confidence Rule Other 1 SDWIS / IL0970050 / 7000
2023 Lead and Copper Rule MR 13 SDWIS / IL0970050 / 5000
2008 Public Notice Other 4 SDWIS / IL0970050 / 7500
2006 Coliform (TCR) MR 17 SDWIS / IL0970050 / 3100
2006 Chlorine MR 2 SDWIS / IL0970050 / 0999
2000 Lead and Copper Rule TT 13 SDWIS / IL0970050 / 5000
1995 Coliform (TCR) MCL 3 SDWIS / IL0970050 / 3100
1993 BHC-GAMMA MR 3 SDWIS / IL0970050 / 2010
1993 Toxaphene MR 3 SDWIS / IL0970050 / 2020
1993 LASSO MR 3 SDWIS / IL0970050 / 2051
1993 Heptachlor MR 3 SDWIS / IL0970050 / 2065
1993 Heptachlor epoxide MR 3 SDWIS / IL0970050 / 2067
1993 2,4-D MR 3 SDWIS / IL0970050 / 2105
1993 Total Polychlorinated Biphenyls (PCB) MR 3 SDWIS / IL0970050 / 2383
1993 1,2-DIBROMO-3-CHLOROPROPANE MR 3 SDWIS / IL0970050 / 2931

How ANTIOCH Compares

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

Metric ANTIOCH Illinois avg Federal benchmark
Total violations 115 69.4 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 16 10.3 Indicates a contaminant exceeded a federal MCL
PFAS detection 1 compound 40.9% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 14,175 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is ANTIOCH water safe to drink? ▼
ANTIOCH (PWS ID: IL0970050) has 115 recorded violations in the EPA SDWIS database. PFAS contamination has been detected in UCMR5 testing, with 1 PFAS compound found. This system serves 14,175 people using Groundwater sources.
How many people does ANTIOCH serve? ▼
ANTIOCH serves 14,175 people in ANTIOCH, Illinois. It is a Local-owned system using Groundwater water sources with 4,598 service connections.
What type of violations does ANTIOCH have? ▼
ANTIOCH has 115 total violations: 16 health-based violations (MCL exceedances or treatment failures), 87 monitoring/reporting violations, and 13 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in ANTIOCH water? ▼
Yes. UCMR5 testing detected 1 PFAS compound in ANTIOCH's water supply: lithium. PFAS are persistent "forever chemicals" that do not break down in the environment.
What water source does ANTIOCH use? ▼
ANTIOCH uses Groundwater 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.

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Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.

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

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Data sourced from $official public datasets. See our methodology for details. Retrieved and formatted by PlainWater Editorial