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PRAIRIE GROVE SCHOOL

PWS ID: IL3062398 · CRYSTAL LAKE, Illinois 60014

PRAIRIE GROVE SCHOOL serves 1,050 people in CRYSTAL LAKE, Illinois using Groundwater water sources. It has 147 recorded EPA violations, including 8 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: PRAIRIE GROVE SCHOOL

PRAIRIE GROVE SCHOOL is a local-owned non-transient non-community water system that delivers drinking water to 1,050 residents in CRYSTAL LAKE, Illinois (McHenry County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 147 total violations for this system , of which 8 (5%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 129 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 Revised Total Coliform Rule, recorded in 53 violations (MON). 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. PRAIRIE GROVE SCHOOL's 147 violations sit above the Illinois average. Statewide, 199 of 487 UCMR5-tested systems have reported PFAS detections (40.9%). 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
1,050
Total Violations
147
Health-Based Violations
8
Water Source
Groundwater

System Details

System Type
Non-Transient Non-Community
Owner Type
Local
Connections
1
County
McHenry
School/Daycare
Yes
MCL Violations
8
Monitoring Violations
129
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 53 2024
Coliform (TCR) MR 30 2010
Coliform (TCR) MCL 8 2008
Public Notice Other 8 2023
Lead and Copper Rule MR 3 2016
BHC-GAMMA MR 2 2002
Endothall MR 2 2002
Atrazine MR 2 2002
LASSO MR 2 2002
Heptachlor MR 2 2002
Heptachlor epoxide MR 2 2002
2,4,5-TP MR 2 2002
Pentachlorophenol MR 2 2002
Total Polychlorinated Biphenyls (PCB) MR 2 2002
1,2-DIBROMO-3-CHLOROPROPANE MR 2 2002
Chlordane MR 2 2002
2,4-D MR 2 2002
Diquat MR 2 2002
Picloram MR 2 2002
OXAMYL MR 2 2002
Methoxychlor MR 2 2002
Carbofuran MR 2 2002
Simazine MR 2 2002
ETHYLENE DIBROMIDE MR 2 2002
Glyphosate MR 2 2002
Toxaphene MR 2 2002
Nitrate MR 1 2018

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 PRAIRIE GROVE 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 IL3062398 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 PRAIRIE GROVE 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 53 SDWIS / IL3062398 / 8000
2023 Public Notice Other 8 SDWIS / IL3062398 / 7500
2018 Nitrate MR 1 SDWIS / IL3062398 / 1040
2016 Lead and Copper Rule MR 3 SDWIS / IL3062398 / 5000
2010 Coliform (TCR) MR 30 SDWIS / IL3062398 / 3100
2008 Coliform (TCR) MCL 8 SDWIS / IL3062398 / 3100
2002 BHC-GAMMA MR 2 SDWIS / IL3062398 / 2010
2002 Endothall MR 2 SDWIS / IL3062398 / 2033
2002 Atrazine MR 2 SDWIS / IL3062398 / 2050
2002 LASSO MR 2 SDWIS / IL3062398 / 2051
2002 Heptachlor MR 2 SDWIS / IL3062398 / 2065
2002 Heptachlor epoxide MR 2 SDWIS / IL3062398 / 2067
2002 2,4,5-TP MR 2 SDWIS / IL3062398 / 2110
2002 Pentachlorophenol MR 2 SDWIS / IL3062398 / 2326
2002 Total Polychlorinated Biphenyls (PCB) MR 2 SDWIS / IL3062398 / 2383

How PRAIRIE GROVE SCHOOL Compares

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

Metric PRAIRIE GROVE SCHOOL Illinois avg Federal benchmark
Total violations 147 69.4 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 8 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 1,050 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
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is PRAIRIE GROVE SCHOOL water safe to drink? ▼
PRAIRIE GROVE SCHOOL (PWS ID: IL3062398) has 147 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,050 people using Groundwater sources.
How many people does PRAIRIE GROVE SCHOOL serve? ▼
PRAIRIE GROVE SCHOOL serves 1,050 people in CRYSTAL LAKE, Illinois. It is a Local-owned system using Groundwater water sources with 1 service connections.
What type of violations does PRAIRIE GROVE SCHOOL have? ▼
PRAIRIE GROVE SCHOOL has 147 total violations: 8 health-based violations (MCL exceedances or treatment failures), 129 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in PRAIRIE GROVE SCHOOL water? ▼
No PFAS testing data is available for PRAIRIE GROVE SCHOOL under the EPA's UCMR5 monitoring program.
What water source does PRAIRIE GROVE SCHOOL use? ▼
PRAIRIE GROVE 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.

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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.

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