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Non-Transient Non-Community Water System · PWS IL3035311

Montmorency School

Rock Falls, Illinois 61071 - drinking water served from groundwater sources to 250 people, tracked in EPA SDWIS and UCMR5.

250
People served
205
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 205 drinking-water violations at Montmorency School, 2% of them health-based - above the Illinois per-system average.

205
Total EPA violations on record
2%
Health-based (MCL / treatment failure)
250
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Montmorency School

Montmorency School is a private-owned non-transient non-community water system that delivers drinking water to 250 residents in Rock Falls, Illinois (Whiteside County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 205 total violations for this system , of which 4 (2%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 201 monitoring and reporting violations are on file. The most recent violation on record dates to 2014.

The most frequently cited contaminant at this system is Cadmium, 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, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%).

Montmorency School's 205 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
250
Total Violations
205
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Private
Connections
1
County
Whiteside
School/Daycare
Yes
MCL Violations
2
Monitoring Violations
201
Treatment Tech Violations
2

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Cadmium MR 8 2014
Chromium MR 8 2014
Mercury MR 8 2014
Beryllium, Total MR 8 2014
Antimony, Total MR 8 2014
Thallium, Total MR 8 2014
Selenium MR 8 2014
Barium MR 8 2014
CYANIDE MR 8 2014
1,2,4-Trichlorobenzene MR 3 2008
cis-1,2-Dichloroethylene MR 3 2008
DICHLOROMETHANE MR 3 2008
p-Dichlorobenzene MR 3 2008
trans-1,2-Dichloroethylene MR 3 2008
1,2-Dichloroethane MR 3 2008
1,1,1-Trichloroethane MR 3 2008
Carbon tetrachloride MR 3 2008
Trichloroethylene MR 3 2008
1,1,2-Trichloroethane MR 3 2008
Tetrachloroethylene MR 3 2008
Benzene MR 3 2008
Toluene MR 3 2008
Ethylbenzene MR 3 2008
Methoxychlor MR 3 2014
Toxaphene MR 3 2014
Diquat MR 3 2014
OXAMYL MR 3 2014
Carbofuran MR 3 2014
LASSO MR 3 2014
Heptachlor MR 3 2014

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 Montmorency 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 IL3035311 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 Montmorency 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
2014 Cadmium MR 8 SDWIS / IL3035311 / 1015
2014 Chromium MR 8 SDWIS / IL3035311 / 1020
2014 Mercury MR 8 SDWIS / IL3035311 / 1035
2014 Beryllium, Total MR 8 SDWIS / IL3035311 / 1075
2014 Antimony, Total MR 8 SDWIS / IL3035311 / 1074
2014 Thallium, Total MR 8 SDWIS / IL3035311 / 1085
2014 Selenium MR 8 SDWIS / IL3035311 / 1045
2014 Barium MR 8 SDWIS / IL3035311 / 1010
2014 CYANIDE MR 8 SDWIS / IL3035311 / 1024
2014 Methoxychlor MR 3 SDWIS / IL3035311 / 2015
2014 Toxaphene MR 3 SDWIS / IL3035311 / 2020
2014 Diquat MR 3 SDWIS / IL3035311 / 2032
2014 OXAMYL MR 3 SDWIS / IL3035311 / 2036
2014 Carbofuran MR 3 SDWIS / IL3035311 / 2046
2014 LASSO MR 3 SDWIS / IL3035311 / 2051

How Montmorency School Compares

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

Metric Montmorency School Illinois avg Federal benchmark
Total violations 205 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 4 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 250 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 Montmorency School water safe to drink? ▼
Montmorency School (PWS ID: IL3035311) has 205 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 250 people using Groundwater sources.
How many people does Montmorency School serve? ▼
Montmorency School serves 250 people in Rock Falls, Illinois. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Montmorency School have? ▼
Montmorency School has 205 total violations: 4 health-based violations (MCL exceedances or treatment failures), 201 monitoring/reporting violations, and 2 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Montmorency School water? ▼
No PFAS testing data is available for Montmorency School under the EPA's UCMR5 monitoring program.
What water source does Montmorency School use? ▼
Montmorency 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.