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Non-Transient Non-Community Water System · PWS IL3109009

Deer Park School

Ottawa, Illinois 61350 - drinking water served from groundwater sources to 155 people, tracked in EPA SDWIS and UCMR5.

155
People served
195
EPA violations
0
Health-based
Untested
UCMR5 result

The verdict

EPA records 195 drinking-water violations at Deer Park School - above the Illinois per-system average.

195
Total EPA violations on record
0%
Health-based (MCL / treatment failure)
155
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Deer Park School

Deer Park School is a public/private-owned non-transient non-community water system that delivers drinking water to 155 residents in Ottawa, Illinois (LaSalle County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 195 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 191 monitoring and reporting violations are on file. The most recent violation on record dates to 2023.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 42 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%).

Deer Park School's 195 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
155
Total Violations
195
Health-Based Violations
0
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Public/Private
Connections
1
County
LaSalle
School/Daycare
Yes
MCL Violations
0
Monitoring Violations
191
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 42 2023
Cadmium MR 5 2011
Chromium MR 5 2011
Antimony, Total MR 5 2011
Thallium, Total MR 5 2011
Selenium MR 5 2011
Mercury MR 5 2011
CYANIDE MR 5 2011
Arsenic MR 5 2017
Barium MR 5 2011
Beryllium, Total MR 5 2011
1,2,4-Trichlorobenzene MR 4 2020
Xylenes, Total MR 4 2020
DICHLOROMETHANE MR 4 2020
o-Dichlorobenzene MR 4 2020
p-Dichlorobenzene MR 4 2020
Vinyl chloride MR 4 2020
1,1-Dichloroethylene MR 4 2020
trans-1,2-Dichloroethylene MR 4 2020
Carbon tetrachloride MR 4 2020
Trichloroethylene MR 4 2020
1,1,2-Trichloroethane MR 4 2020
Toluene MR 4 2020
cis-1,2-Dichloroethylene MR 4 2020
1,1,1-Trichloroethane MR 4 2020
Ethylbenzene MR 4 2020
Styrene MR 4 2020
Benzene MR 4 2020
CHLOROBENZENE MR 4 2020
1,2-Dichloropropane MR 4 2020

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 Deer Park 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 IL3109009 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 Deer Park 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
2023 Lead and Copper Rule MR 42 SDWIS / IL3109009 / 5000
2020 1,2,4-Trichlorobenzene MR 4 SDWIS / IL3109009 / 2378
2020 Xylenes, Total MR 4 SDWIS / IL3109009 / 2955
2020 DICHLOROMETHANE MR 4 SDWIS / IL3109009 / 2964
2020 o-Dichlorobenzene MR 4 SDWIS / IL3109009 / 2968
2020 p-Dichlorobenzene MR 4 SDWIS / IL3109009 / 2969
2020 Vinyl chloride MR 4 SDWIS / IL3109009 / 2976
2020 1,1-Dichloroethylene MR 4 SDWIS / IL3109009 / 2977
2020 trans-1,2-Dichloroethylene MR 4 SDWIS / IL3109009 / 2979
2020 Carbon tetrachloride MR 4 SDWIS / IL3109009 / 2982
2020 Trichloroethylene MR 4 SDWIS / IL3109009 / 2984
2020 1,1,2-Trichloroethane MR 4 SDWIS / IL3109009 / 2985
2020 Toluene MR 4 SDWIS / IL3109009 / 2991
2020 cis-1,2-Dichloroethylene MR 4 SDWIS / IL3109009 / 2380
2020 1,1,1-Trichloroethane MR 4 SDWIS / IL3109009 / 2981

How Deer Park School Compares

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

Metric Deer Park School Illinois avg Federal benchmark
Total violations 195 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 155 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 Deer Park School water safe to drink? ▼
Deer Park School (PWS ID: IL3109009) has 195 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 155 people using Groundwater sources.
How many people does Deer Park School serve? ▼
Deer Park School serves 155 people in Ottawa, Illinois. It is a Public/Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Deer Park School have? ▼
Deer Park School has 195 total violations: 0 health-based violations (MCL exceedances or treatment failures), 191 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Deer Park School water? ▼
No PFAS testing data is available for Deer Park School under the EPA's UCMR5 monitoring program.
What water source does Deer Park School use? ▼
Deer Park 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.