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Non-Transient Non-Community Water System · PWS IL3057844

Olympia School

Stanford, Illinois 61744 - drinking water served from groundwater sources to 918 people, tracked in EPA SDWIS and UCMR5.

918
People served
632
EPA violations
52
Health-based
Untested
UCMR5 result

The verdict

EPA records 632 drinking-water violations at Olympia School, 8% of them health-based - above the Illinois per-system average.

632
Total EPA violations on record
8%
Health-based (MCL / treatment failure)
918
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Olympia School

Olympia School is a local-owned non-transient non-community water system that delivers drinking water to 918 residents in Stanford, Illinois (McLean County) through 2 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 632 total violations for this system , of which 52 (8%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 574 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Arsenic, recorded in 40 violations (MCL, health-based). 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%).

Olympia School's 632 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
918
Total Violations
632
Health-Based Violations
52
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
2
County
McLean
School/Daycare
Yes
MCL Violations
52
Monitoring Violations
574
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 40 2020
Revised Total Coliform Rule MON 27 2024
1,1,1-Trichloroethane MR 21 2020
1,2-Dichloropropane MR 21 2020
1,1,2-Trichloroethane MR 21 2020
Tetrachloroethylene MR 21 2020
Toluene MR 21 2020
Styrene MR 21 2020
1,2,4-Trichlorobenzene MR 21 2020
Xylenes, Total MR 21 2020
DICHLOROMETHANE MR 21 2020
o-Dichlorobenzene MR 21 2020
p-Dichlorobenzene MR 21 2020
Vinyl chloride MR 21 2020
Trichloroethylene MR 21 2020
CHLOROBENZENE MR 21 2020
Ethylbenzene MR 21 2020
1,2-Dichloroethane MR 21 2020
Benzene MR 21 2020
cis-1,2-Dichloroethylene MR 21 2020
1,1-Dichloroethylene MR 21 2020
Carbon tetrachloride MR 21 2020
trans-1,2-Dichloroethylene MR 21 2020
Arsenic MR 17 2024
TTHM MR 15 2024
Total Haloacetic Acids (HAA5) MR 15 2024
Lead and Copper Rule MR 11 2016
Total Haloacetic Acids (HAA5) MCL 11 2020
Chlorine MR 4 2024
Public Notice Other 3 2022

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 Olympia 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 IL3057844 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 Olympia 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
2024 Revised Total Coliform Rule MON 27 SDWIS / IL3057844 / 8000
2024 Arsenic MR 17 SDWIS / IL3057844 / 1005
2024 TTHM MR 15 SDWIS / IL3057844 / 2950
2024 Total Haloacetic Acids (HAA5) MR 15 SDWIS / IL3057844 / 2456
2024 Chlorine MR 4 SDWIS / IL3057844 / 0999
2022 Public Notice Other 3 SDWIS / IL3057844 / 7500
2020 Arsenic MCL 40 SDWIS / IL3057844 / 1005
2020 1,1,1-Trichloroethane MR 21 SDWIS / IL3057844 / 2981
2020 1,2-Dichloropropane MR 21 SDWIS / IL3057844 / 2983
2020 1,1,2-Trichloroethane MR 21 SDWIS / IL3057844 / 2985
2020 Tetrachloroethylene MR 21 SDWIS / IL3057844 / 2987
2020 Toluene MR 21 SDWIS / IL3057844 / 2991
2020 Styrene MR 21 SDWIS / IL3057844 / 2996
2020 1,2,4-Trichlorobenzene MR 21 SDWIS / IL3057844 / 2378
2020 Xylenes, Total MR 21 SDWIS / IL3057844 / 2955

How Olympia School Compares

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

Metric Olympia School Illinois avg Federal benchmark
Total violations 632 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 52 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 918 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 Olympia School water safe to drink? ▼
Olympia School (PWS ID: IL3057844) has 632 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 918 people using Groundwater sources.
How many people does Olympia School serve? ▼
Olympia School serves 918 people in Stanford, Illinois. It is a Local-owned system using Groundwater water sources with 2 service connections.
What type of violations does Olympia School have? ▼
Olympia School has 632 total violations: 52 health-based violations (MCL exceedances or treatment failures), 574 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Olympia School water? ▼
No PFAS testing data is available for Olympia School under the EPA's UCMR5 monitoring program.
What water source does Olympia School use? ▼
Olympia 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.