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Non-Transient Non-Community Water System · PWS IL3107045

Riverwoods Montessori School

Riverwoods, Illinois 60015 - drinking water served from groundwater sources to 65 people, tracked in EPA SDWIS and UCMR5.

65
People served
56
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 56 drinking-water violations at Riverwoods Montessori School - below the Illinois per-system average.

56
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
65
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Riverwoods Montessori School

Riverwoods Montessori School is a private-owned non-transient non-community water system that delivers drinking water to 65 residents in Riverwoods, Illinois (Lake County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 56 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 56 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 8 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%).

Riverwoods Montessori School's 56 violations sit below 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
65
Total Violations
56
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
2
County
Lake
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
56
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 8 2021
Arsenic MR 5 2014
1,1,1-Trichloroethane MR 2 1996
Carbon tetrachloride MR 2 1996
1,2-Dichloropropane MR 2 1996
1,1,2-Trichloroethane MR 2 1996
Tetrachloroethylene MR 2 1996
CHLOROBENZENE MR 2 1996
Toluene MR 2 1996
Ethylbenzene MR 2 1996
Styrene MR 2 1996
1,2,4-Trichlorobenzene MR 2 1996
cis-1,2-Dichloroethylene MR 2 1996
Xylenes, Total MR 2 1996
p-Dichlorobenzene MR 2 1996
1,1-Dichloroethylene MR 2 1996
Vinyl chloride MR 2 1996
1,2-Dichloroethane MR 2 1996
Benzene MR 2 1996
DICHLOROMETHANE MR 2 1996
o-Dichlorobenzene MR 2 1996
trans-1,2-Dichloroethylene MR 2 1996
Trichloroethylene MR 2 1996
Nitrate MR 1 2018

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 Riverwoods Montessori School.

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 IL3107045 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 Riverwoods Montessori School 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
2021 Lead and Copper Rule MR 8 SDWIS / IL3107045 / 5000
2018 Nitrate MR 1 SDWIS / IL3107045 / 1040
2014 Arsenic MR 5 SDWIS / IL3107045 / 1005
1996 1,1,1-Trichloroethane MR 2 SDWIS / IL3107045 / 2981
1996 Carbon tetrachloride MR 2 SDWIS / IL3107045 / 2982
1996 1,2-Dichloropropane MR 2 SDWIS / IL3107045 / 2983
1996 1,1,2-Trichloroethane MR 2 SDWIS / IL3107045 / 2985
1996 Tetrachloroethylene MR 2 SDWIS / IL3107045 / 2987
1996 CHLOROBENZENE MR 2 SDWIS / IL3107045 / 2989
1996 Toluene MR 2 SDWIS / IL3107045 / 2991
1996 Ethylbenzene MR 2 SDWIS / IL3107045 / 2992
1996 Styrene MR 2 SDWIS / IL3107045 / 2996
1996 1,2,4-Trichlorobenzene MR 2 SDWIS / IL3107045 / 2378
1996 cis-1,2-Dichloroethylene MR 2 SDWIS / IL3107045 / 2380
1996 Xylenes, Total MR 2 SDWIS / IL3107045 / 2955

How Riverwoods Montessori School Compares

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

Metric Riverwoods Montessori School Illinois avg Federal benchmark
Total violations 56 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 65 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 Riverwoods Montessori School water safe to drink? ▼
Riverwoods Montessori School (PWS ID: IL3107045) has 56 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 65 people using Groundwater sources.
How many people does Riverwoods Montessori School serve? ▼
Riverwoods Montessori School serves 65 people in Riverwoods, Illinois. It is a Private-owned system using Groundwater water sources with 2 service connections.
What type of violations does Riverwoods Montessori School have? ▼
Riverwoods Montessori School has 56 total violations: 0 health-based violations (MCL exceedances or treatment failures), 56 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Riverwoods Montessori School water? ▼
No PFAS testing data is available for Riverwoods Montessori School under the EPA's UCMR5 monitoring program.
What water source does Riverwoods Montessori School use? ▼
Riverwoods Montessori School 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.