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Non-Transient Non-Community Water System · PWS IL3149823

Monte Carlo Plaza

Park Ridge, Illinois 60068 - drinking water served from groundwater sources to 235 people, tracked in EPA SDWIS and UCMR5.

235
People served
893
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 893 drinking-water violations at Monte Carlo Plaza - above the Illinois per-system average.

893
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
235
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Monte Carlo Plaza

Monte Carlo Plaza is a private-owned non-transient non-community water system that delivers drinking water to 235 residents in Park Ridge, Illinois (Cook County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 893 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 882 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 BHC-GAMMA, recorded in 23 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, 123 of 487 UCMR5-tested systems have reported PFAS detections (25.3%).

Monte Carlo Plaza's 893 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
235
Total Violations
893
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
2
County
Cook
School/Daycare
No
MCL Violations
0
Monitoring Violations
882
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
BHC-GAMMA MR 23 2021
Methoxychlor MR 23 2021
Carbofuran MR 23 2021
LASSO MR 23 2021
2,4,5-TP MR 23 2021
Pentachlorophenol MR 23 2021
1,2-DIBROMO-3-CHLOROPROPANE MR 23 2021
ETHYLENE DIBROMIDE MR 23 2021
Chlordane MR 23 2021
Atrazine MR 23 2021
Heptachlor MR 23 2021
Heptachlor epoxide MR 23 2021
2,4-D MR 23 2021
Total Polychlorinated Biphenyls (PCB) MR 23 2021
Toxaphene MR 23 2021
1,2,4-Trichlorobenzene MR 22 2021
cis-1,2-Dichloroethylene MR 22 2021
DICHLOROMETHANE MR 22 2021
o-Dichlorobenzene MR 22 2021
p-Dichlorobenzene MR 22 2021
Vinyl chloride MR 22 2021
trans-1,2-Dichloroethylene MR 22 2021
1,1,1-Trichloroethane MR 22 2021
Carbon tetrachloride MR 22 2021
1,2-Dichloropropane MR 22 2021
Trichloroethylene MR 22 2021
1,1,2-Trichloroethane MR 22 2021
Tetrachloroethylene MR 22 2021
CHLOROBENZENE MR 22 2021
Ethylbenzene MR 22 2021

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 Monte Carlo Plaza.

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 IL3149823 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 Monte Carlo Plaza 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 Public Notice Other 10 SDWIS / IL3149823 / 7500
2024 Lead and Copper Rule MR 21 SDWIS / IL3149823 / 5000
2024 Revised Total Coliform Rule MON 7 SDWIS / IL3149823 / 8000
2021 BHC-GAMMA MR 23 SDWIS / IL3149823 / 2010
2021 Methoxychlor MR 23 SDWIS / IL3149823 / 2015
2021 Carbofuran MR 23 SDWIS / IL3149823 / 2046
2021 LASSO MR 23 SDWIS / IL3149823 / 2051
2021 2,4,5-TP MR 23 SDWIS / IL3149823 / 2110
2021 Pentachlorophenol MR 23 SDWIS / IL3149823 / 2326
2021 1,2-DIBROMO-3-CHLOROPROPANE MR 23 SDWIS / IL3149823 / 2931
2021 ETHYLENE DIBROMIDE MR 23 SDWIS / IL3149823 / 2946
2021 Chlordane MR 23 SDWIS / IL3149823 / 2959
2021 Atrazine MR 23 SDWIS / IL3149823 / 2050
2021 Heptachlor MR 23 SDWIS / IL3149823 / 2065
2021 Heptachlor epoxide MR 23 SDWIS / IL3149823 / 2067

How Monte Carlo Plaza Compares

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

Metric Monte Carlo Plaza Illinois avg Federal benchmark
Total violations 893 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 25.3% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 235 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 Monte Carlo Plaza water safe to drink? ▼
Monte Carlo Plaza (PWS ID: IL3149823) has 893 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 235 people using Groundwater sources.
How many people does Monte Carlo Plaza serve? ▼
Monte Carlo Plaza serves 235 people in Park Ridge, Illinois. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does Monte Carlo Plaza have? ▼
Monte Carlo Plaza has 893 total violations: 0 health-based violations (MCL exceedances or treatment failures), 882 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Monte Carlo Plaza water? ▼
No PFAS testing data is available for Monte Carlo Plaza under the EPA's UCMR5 monitoring program.
What water source does Monte Carlo Plaza use? ▼
Monte Carlo Plaza uses Groundwater as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
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.