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Transient Non-Community Water System · PWS IL3000828

Rolling Oaks Office Well

Sheridan, Illinois 60551 - drinking water served from groundwater sources to 250 people, tracked in EPA SDWIS and UCMR5.

250
People served
40
EPA violations
13
Health-based
Untested
UCMR5 result

The verdict

EPA records 40 drinking-water violations at Rolling Oaks Office Well, 33% of them health-based - below the Illinois per-system average.

40
Total EPA violations on record
33%
Health-based (MCL / treatment failure)
250
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Rolling Oaks Office Well

Rolling Oaks Office Well is a private-owned transient non-community water system that delivers drinking water to 250 residents in Sheridan, Illinois (LaSalle County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 40 total violations for this system , of which 13 (33%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 21 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 Coliform (TCR), recorded in 13 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%).

Rolling Oaks Office Well's 40 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
250
Total Violations
40
Health-Based Violations
13
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
1
County
LaSalle
School/Daycare
No
MCL Violations
4
Monitoring Violations
21
Treatment Tech Violations
9

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 13 2008
Revised Total Coliform Rule TT 9 2025
Nitrate MR 5 2020
Coliform (TCR) MCL 4 1994
E. COLI MR 3 2025
Public Notice Other 2 2025

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 Rolling Oaks Office Well.

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 IL3000828 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 Rolling Oaks Office Well 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 Revised Total Coliform Rule TT 9 SDWIS / IL3000828 / 8000
2025 E. COLI MR 3 SDWIS / IL3000828 / 3014
2025 Public Notice Other 2 SDWIS / IL3000828 / 7500
2020 Nitrate MR 5 SDWIS / IL3000828 / 1040
2008 Coliform (TCR) MR 13 SDWIS / IL3000828 / 3100
1994 Coliform (TCR) MCL 4 SDWIS / IL3000828 / 3100

How Rolling Oaks Office Well Compares

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

Metric Rolling Oaks Office Well Illinois avg Federal benchmark
Total violations 40 69.4 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 13 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 Rolling Oaks Office Well water safe to drink? ▼
Rolling Oaks Office Well (PWS ID: IL3000828) has 40 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 Rolling Oaks Office Well serve? ▼
Rolling Oaks Office Well serves 250 people in Sheridan, Illinois. It is a Private-owned system using Groundwater water sources with 1 service connections.
What type of violations does Rolling Oaks Office Well have? ▼
Rolling Oaks Office Well has 40 total violations: 13 health-based violations (MCL exceedances or treatment failures), 21 monitoring/reporting violations, and 9 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Rolling Oaks Office Well water? ▼
No PFAS testing data is available for Rolling Oaks Office Well under the EPA's UCMR5 monitoring program.
What water source does Rolling Oaks Office Well use? ▼
Rolling Oaks Office Well uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.