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Community Water System · PWS IL1790400

Marquette Heights

Marquette Heights, Illinois 61554 - drinking water served from groundwater sources to 2,974 people, tracked in EPA SDWIS and UCMR5.

2,974
People served
127
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 127 drinking-water violations at Marquette Heights - above the Illinois per-system average.

127
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
2,974
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Marquette Heights

Marquette Heights is a local-owned community water system that delivers drinking water to 2,974 residents in Marquette Heights, Illinois (Tazewell County) through 1,139 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 127 total violations for this system , of which 0 (0%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 125 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 1,1-Dichloroethylene, recorded in 12 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%).

Marquette Heights's 127 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
2,974
Total Violations
127
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
1,139
County
Tazewell
School/Daycare
No
MCL Violations
0
Monitoring Violations
125
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,1-Dichloroethylene MR 12 1991
1,2-Dichloroethane MR 12 1991
Carbon tetrachloride MR 12 1991
Trichloroethylene MR 12 1991
Benzene MR 12 1991
1,1,1-Trichloroethane MR 12 1991
p-Dichlorobenzene MR 11 1991
Arsenic MR 4 1987
Barium MR 4 1987
Cadmium MR 4 1987
TTHM MR 4 2023
Total Haloacetic Acids (HAA5) MR 4 2023
Mercury MR 4 1987
Nitrate MR 4 1987
Selenium MR 4 1987
Fluoride MR 4 1987
Chromium MR 4 1987
LEAD AND COPPER RULE REVISIONS RPT 2 2025
Gross Alpha, Excl. Radon and U MR 1 1977
Coliform (TCR) MR 1 1995

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 Marquette Heights.

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 IL1790400 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 Marquette Heights 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 LEAD AND COPPER RULE REVISIONS RPT 2 SDWIS / IL1790400 / 5200
2023 TTHM MR 4 SDWIS / IL1790400 / 2950
2023 Total Haloacetic Acids (HAA5) MR 4 SDWIS / IL1790400 / 2456
1995 Coliform (TCR) MR 1 SDWIS / IL1790400 / 3100
1991 1,1-Dichloroethylene MR 12 SDWIS / IL1790400 / 2977
1991 1,2-Dichloroethane MR 12 SDWIS / IL1790400 / 2980
1991 Carbon tetrachloride MR 12 SDWIS / IL1790400 / 2982
1991 Trichloroethylene MR 12 SDWIS / IL1790400 / 2984
1991 Benzene MR 12 SDWIS / IL1790400 / 2990
1991 1,1,1-Trichloroethane MR 12 SDWIS / IL1790400 / 2981
1991 p-Dichlorobenzene MR 11 SDWIS / IL1790400 / 2969
1987 Arsenic MR 4 SDWIS / IL1790400 / 1005
1987 Barium MR 4 SDWIS / IL1790400 / 1010
1987 Cadmium MR 4 SDWIS / IL1790400 / 1015
1987 Mercury MR 4 SDWIS / IL1790400 / 1035

How Marquette Heights Compares

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

Metric Marquette Heights Illinois avg Federal benchmark
Total violations 127 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 0 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 2,974 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 Marquette Heights water safe to drink? ▼
Marquette Heights (PWS ID: IL1790400) has 127 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,974 people using Groundwater sources.
How many people does Marquette Heights serve? ▼
Marquette Heights serves 2,974 people in Marquette Heights, Illinois. It is a Local-owned system using Groundwater water sources with 1,139 service connections.
What type of violations does Marquette Heights have? ▼
Marquette Heights has 127 total violations: 0 health-based violations (MCL exceedances or treatment failures), 125 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Marquette Heights water? ▼
No PFAS testing data is available for Marquette Heights under the EPA's UCMR5 monitoring program.
What water source does Marquette Heights use? ▼
Marquette Heights 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.
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.