CRYSTAL LAKE MONTESSORI
PWS ID: IL3057232 · WOODSTOCK, Illinois 60098
CRYSTAL LAKE MONTESSORI serves 200 people in WOODSTOCK, Illinois using Groundwater water sources. It has 193 recorded EPA violations, including 4 health-based violations. No PFAS contamination was detected in UCMR5 testing.
Water Quality Snapshot: CRYSTAL LAKE MONTESSORI
CRYSTAL LAKE MONTESSORI is a private-owned non-transient non-community water system that delivers drinking water to 200 residents in WOODSTOCK, Illinois (McHenry County) through 1 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 193 total violations for this system , of which 4 (2%) are health-based — meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 189 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.
The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 9 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. CRYSTAL LAKE MONTESSORI's 193 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.
System Details
- System Type
- Non-Transient Non-Community
- Owner Type
- Private
- Connections
- 1
- County
- McHenry
- School/Daycare
- Yes
- MCL Violations
- 4
- Monitoring Violations
- 189
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Lead and Copper Rule | MR | 9 | 2022 |
| 1,2,4-Trichlorobenzene | MR | 7 | 2012 |
| cis-1,2-Dichloroethylene | MR | 7 | 2012 |
| DICHLOROMETHANE | MR | 7 | 2012 |
| o-Dichlorobenzene | MR | 7 | 2012 |
| p-Dichlorobenzene | MR | 7 | 2012 |
| Vinyl chloride | MR | 7 | 2012 |
| 1,1-Dichloroethylene | MR | 7 | 2012 |
| 1,2-Dichloroethane | MR | 7 | 2012 |
| 1,1,1-Trichloroethane | MR | 7 | 2012 |
| 1,2-Dichloropropane | MR | 7 | 2012 |
| Trichloroethylene | MR | 7 | 2012 |
| CHLOROBENZENE | MR | 7 | 2012 |
| Benzene | MR | 7 | 2012 |
| Xylenes, Total | MR | 7 | 2012 |
| trans-1,2-Dichloroethylene | MR | 7 | 2012 |
| Tetrachloroethylene | MR | 7 | 2012 |
| Ethylbenzene | MR | 7 | 2012 |
| Styrene | MR | 7 | 2012 |
| Carbon tetrachloride | MR | 7 | 2012 |
| Toluene | MR | 7 | 2012 |
| 1,1,2-Trichloroethane | MR | 7 | 2012 |
| Coliform (TCR) | MCL | 4 | 2015 |
| Coliform (TCR) | MR | 2 | 1992 |
| Carbofuran | MR | 1 | 2017 |
| Toxaphene | MR | 1 | 2017 |
| Heptachlor | MR | 1 | 2017 |
| CYANIDE | MR | 1 | 2011 |
| Cadmium | MR | 1 | 2011 |
| Methoxychlor | MR | 1 | 2017 |
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 CRYSTAL LAKE MONTESSORI.
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 IL3057232 on SDWISSource: EPA SDWIS Federal Reports Search
Illinois Drinking Water Authority
Illinois EPA — Bureau of Water is the primacy agency that licenses and inspects CRYSTAL LAKE MONTESSORI under EPA-delegated authority.
Open IL regulator portalSource: 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 |
|---|---|---|---|---|
| 2022 | Lead and Copper Rule | MR | 9 | SDWIS / IL3057232 / 5000 |
| 2017 | Carbofuran | MR | 1 | SDWIS / IL3057232 / 2046 |
| 2017 | Toxaphene | MR | 1 | SDWIS / IL3057232 / 2020 |
| 2017 | Heptachlor | MR | 1 | SDWIS / IL3057232 / 2065 |
| 2017 | Methoxychlor | MR | 1 | SDWIS / IL3057232 / 2015 |
| 2017 | Total Polychlorinated Biphenyls (PCB) | MR | 1 | SDWIS / IL3057232 / 2383 |
| 2017 | Pentachlorophenol | MR | 1 | SDWIS / IL3057232 / 2326 |
| 2017 | Chlordane | MR | 1 | SDWIS / IL3057232 / 2959 |
| 2017 | OXAMYL | MR | 1 | SDWIS / IL3057232 / 2036 |
| 2017 | LASSO | MR | 1 | SDWIS / IL3057232 / 2051 |
| 2017 | Heptachlor epoxide | MR | 1 | SDWIS / IL3057232 / 2067 |
| 2017 | ETHYLENE DIBROMIDE | MR | 1 | SDWIS / IL3057232 / 2946 |
| 2017 | Arsenic | MR | 1 | SDWIS / IL3057232 / 1005 |
| 2017 | Picloram | MR | 1 | SDWIS / IL3057232 / 2040 |
| 2017 | Glyphosate | MR | 1 | SDWIS / IL3057232 / 2034 |
How CRYSTAL LAKE MONTESSORI Compares
Cross-reference this system's record against state averages and the federal MCL framework for context.
| Metric | CRYSTAL LAKE MONTESSORI | Illinois avg | Federal benchmark |
|---|---|---|---|
| Total violations | 193 | 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 | 200 | 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
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Related Data for Illinois
Read our methodology — how this data is sourced, computed, and verified.