Crystal Lake Montessori

PWSID: IL3057232

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No active violations
This system has no unresolved violations. The most recent violation on record was 2022-01-18.

This system has more violations on record than 91% of water systems in Illinois.

Violation trend: 0.4 per year over the last 5 years, down from 4.4 per year in the previous 5.

System Details

Population Served	200
Service Connections	1
Water Source	Groundwater
System Type	Non-Transient Non-Community
Owner	Private
Status	Active
City	Woodstock
EPA ZIP on File	60098
Note	School or Daycare

Lead & Copper Testing

Contaminant	Level	EPA Action Level	Status
Lead (90th percentile)	0.0100 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0033 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0000 mg/L	0.015 mg/L	Below Action Level
Lead (90th percentile)	0.0000 mg/L	0.015 mg/L	Below Action Level

Violation History (35 total)

Contaminant	Violation	Date	Health-Based	Status
5000	MR	2022-01-18		Returned to Compliance
5000	MR	2022-01-18		Returned to Compliance
2010	MR	2017-01-01	Major	Acknowledged
2015	MR	2017-01-01	Major	Acknowledged
2020	MR	2017-01-01	Major	Acknowledged
2032	MR	2017-01-01	Major	Acknowledged
2033	MR	2017-01-01	Major	Acknowledged
2034	MR	2017-01-01	Major	Acknowledged
2036	MR	2017-01-01	Major	Acknowledged
2037	MR	2017-01-01	Major	Acknowledged
2040	MR	2017-01-01	Major	Acknowledged
2046	MR	2017-01-01	Major	Acknowledged
2050	MR	2017-01-01	Major	Acknowledged
2051	MR	2017-01-01	Major	Acknowledged
2065	MR	2017-01-01	Major	Acknowledged
2067	MR	2017-01-01	Major	Acknowledged
2105	MR	2017-01-01	Major	Acknowledged
2110	MR	2017-01-01	Major	Acknowledged
2326	MR	2017-01-01	Major	Acknowledged
2383	MR	2017-01-01	Major	Acknowledged
2931	MR	2017-01-01	Major	Acknowledged
2946	MR	2017-01-01	Major	Acknowledged
2959	MR	2017-01-01	Major	Acknowledged
1005	MR	2017-01-01	Major	Acknowledged
3100	MCL	2015-12-01	Yes	Returned to Compliance
5000	MR	2012-10-01		Returned to Compliance
1010	MR	2011-01-01	Major	Acknowledged
1015	MR	2011-01-01	Major	Acknowledged
1020	MR	2011-01-01	Major	Acknowledged
1024	MR	2011-01-01	Major	Acknowledged
1035	MR	2011-01-01	Major	Acknowledged
1074	MR	2011-01-01	Major	Acknowledged
1075	MR	2011-01-01	Major	Acknowledged
1085	MR	2011-01-01	Major	Acknowledged
1045	MR	2011-01-01	Major	Acknowledged

Understanding This Water System's Record

Crystal Lake Montessori is a non-transient non-community water system that draws from groundwater sources and serves a population of 200 in Woodstock, Illinois. This page shows its complete compliance history as reported to the EPA's Safe Drinking Water Information System (SDWIS), the federal database that tracks every public water system in the United States.

What Do These Violations Mean?

Health-based violations mean the system exceeded an EPA maximum contaminant level (MCL) or failed to provide required treatment. These indicate potential health risks from contaminants like lead, arsenic, bacteria, nitrates, or disinfection byproducts. Non-health-based violations involve monitoring, reporting, or procedural requirements — the system missed a testing deadline or failed to notify customers, but contaminant levels were not necessarily unsafe.

What Should You Do?

Your water utility is required to publish an annual Consumer Confidence Report (CCR) that details test results and any violations. If your system has active health-based violations, consider a certified water filter rated for the specific contaminants involved. The contaminant guides on this site explain health risks and filter options for common pollutants. For the most current results, contact your water utility directly — EPA data can lag weeks or months behind real-time testing.