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Community Water System · PWS IL1794320

Deer Creek

Deer Creek, Illinois 61733 - drinking water served from groundwater sources to 647 people, tracked in EPA SDWIS and UCMR5.

647
People served
87
EPA violations
4
Health-based
Untested
UCMR5 result

The verdict

EPA records 87 drinking-water violations at Deer Creek, 5% of them health-based - above the Illinois per-system average.

87
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
647
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Deer Creek

Deer Creek is a local-owned community water system that delivers drinking water to 647 residents in Deer Creek, Illinois (Tazewell County) through 346 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 87 total violations for this system , of which 4 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 66 monitoring and reporting violations are on file. The most recent violation on record dates to 2020.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 27 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 Creek's 87 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
647
Total Violations
87
Health-Based Violations
4
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
346
County
Tazewell
School/Daycare
No
MCL Violations
4
Monitoring Violations
66
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 27 2007
Chlorine MR 12 2007
Public Notice Other 6 2008
Coliform (TCR) MCL 4 2015
Consumer Confidence Rule Other 4 2018
Fluoride MR 4 1986
Selenium MR 4 1986
Mercury MR 4 1986
Nitrate MR 4 1986
Lead and Copper Rule MR 3 2020
Chromium MR 2 1986
Combined Radium (-226 and -228) MR 2 2008
Cadmium MR 1 1986
Arsenic MR 1 1986
Barium MR 1 1986
Gross Alpha, Excl. Radon and U MR 1 1977

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 Creek.

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 IL1794320 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 Creek 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
2020 Lead and Copper Rule MR 3 SDWIS / IL1794320 / 5000
2018 Consumer Confidence Rule Other 4 SDWIS / IL1794320 / 7000
2015 Coliform (TCR) MCL 4 SDWIS / IL1794320 / 3100
2008 Public Notice Other 6 SDWIS / IL1794320 / 7500
2008 Combined Radium (-226 and -228) MR 2 SDWIS / IL1794320 / 4010
2007 Coliform (TCR) MR 27 SDWIS / IL1794320 / 3100
2007 Chlorine MR 12 SDWIS / IL1794320 / 0999
1986 Fluoride MR 4 SDWIS / IL1794320 / 1025
1986 Selenium MR 4 SDWIS / IL1794320 / 1045
1986 Mercury MR 4 SDWIS / IL1794320 / 1035
1986 Nitrate MR 4 SDWIS / IL1794320 / 1040
1986 Chromium MR 2 SDWIS / IL1794320 / 1020
1986 Cadmium MR 1 SDWIS / IL1794320 / 1015
1986 Arsenic MR 1 SDWIS / IL1794320 / 1005
1986 Barium MR 1 SDWIS / IL1794320 / 1010

How Deer Creek Compares

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

Metric Deer Creek Illinois avg Federal benchmark
Total violations 87 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 647 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 Creek water safe to drink? ▼
Deer Creek (PWS ID: IL1794320) has 87 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 647 people using Groundwater sources.
How many people does Deer Creek serve? ▼
Deer Creek serves 647 people in Deer Creek, Illinois. It is a Local-owned system using Groundwater water sources with 346 service connections.
What type of violations does Deer Creek have? ▼
Deer Creek has 87 total violations: 4 health-based violations (MCL exceedances or treatment failures), 66 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Deer Creek water? ▼
No PFAS testing data is available for Deer Creek under the EPA's UCMR5 monitoring program.
What water source does Deer Creek use? ▼
Deer Creek uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
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.