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JOHNSBURG NO.2

PWS ID: IL1115080 · JOHNSBURG, Illinois 60051

JOHNSBURG NO.2 serves 1,124 people in JOHNSBURG, Illinois using Groundwater water sources. It has 157 recorded EPA violations, including 19 health-based violations. No PFAS contamination was detected in UCMR5 testing.

Water Quality Snapshot: JOHNSBURG NO.2

JOHNSBURG NO.2 is a local-owned community water system that delivers drinking water to 1,124 residents in JOHNSBURG, Illinois (McHenry County) through 349 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 157 total violations for this system , of which 19 (12%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 97 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 Coliform (TCR), recorded in 12 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. JOHNSBURG NO.2's 157 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
1,124
Total Violations
157
Health-Based Violations
19
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
349
County
McHenry
School/Daycare
No
MCL Violations
12
Monitoring Violations
97
Treatment Tech Violations
7

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 12 2009
Combined Radium (-226 and -228) MCL 12 2007
Nitrate MR 8 2007
Lead and Copper Rule MR 8 2019
Public Notice Other 8 2018
TTHM MR 8 2023
Total Haloacetic Acids (HAA5) MR 8 2023
Consumer Confidence Rule Other 8 2024
Lead and Copper Rule TT 7 1996
Combined Radium (-226 and -228) MR 6 2007
Chlorine MR 6 2009
Toluene MR 6 2008
p-Dichlorobenzene MR 4 1991
1,1-Dichloroethylene MR 4 1991
1,2-Dichloroethane MR 4 1991
1,1,1-Trichloroethane MR 4 1991
Trichloroethylene MR 4 1991
Benzene MR 4 1991
Carbon tetrachloride MR 4 1991
Di(2-ethylhexyl) phthalate MR 4 2007
Chlordane MR 2 2014
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 JOHNSBURG NO.2.

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 IL1115080 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 JOHNSBURG NO.2 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 Consumer Confidence Rule Other 8 SDWIS / IL1115080 / 7000
2023 TTHM MR 8 SDWIS / IL1115080 / 2950
2023 Total Haloacetic Acids (HAA5) MR 8 SDWIS / IL1115080 / 2456
2019 Lead and Copper Rule MR 8 SDWIS / IL1115080 / 5000
2018 Public Notice Other 8 SDWIS / IL1115080 / 7500
2014 Chlordane MR 2 SDWIS / IL1115080 / 2959
2009 Coliform (TCR) MR 12 SDWIS / IL1115080 / 3100
2009 Chlorine MR 6 SDWIS / IL1115080 / 0999
2008 Toluene MR 6 SDWIS / IL1115080 / 2991
2007 Combined Radium (-226 and -228) MCL 12 SDWIS / IL1115080 / 4010
2007 Nitrate MR 8 SDWIS / IL1115080 / 1040
2007 Combined Radium (-226 and -228) MR 6 SDWIS / IL1115080 / 4010
2007 Di(2-ethylhexyl) phthalate MR 4 SDWIS / IL1115080 / 2039
1996 Lead and Copper Rule TT 7 SDWIS / IL1115080 / 5000
1991 p-Dichlorobenzene MR 4 SDWIS / IL1115080 / 2969

How JOHNSBURG NO.2 Compares

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

Metric JOHNSBURG NO.2 Illinois avg Federal benchmark
Total violations 157 69.4 SDWA compliance — any non-zero count is a recorded breach
Health-based violations 19 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 1,124 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 JOHNSBURG NO.2 water safe to drink? ▼
JOHNSBURG NO.2 (PWS ID: IL1115080) has 157 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,124 people using Groundwater sources.
How many people does JOHNSBURG NO.2 serve? ▼
JOHNSBURG NO.2 serves 1,124 people in JOHNSBURG, Illinois. It is a Local-owned system using Groundwater water sources with 349 service connections.
What type of violations does JOHNSBURG NO.2 have? ▼
JOHNSBURG NO.2 has 157 total violations: 19 health-based violations (MCL exceedances or treatment failures), 97 monitoring/reporting violations, and 7 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in JOHNSBURG NO.2 water? ▼
No PFAS testing data is available for JOHNSBURG NO.2 under the EPA's UCMR5 monitoring program.
What water source does JOHNSBURG NO.2 use? ▼
JOHNSBURG NO.2 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.

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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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