Natures Classroom Institute Property LLC
PWSID: WI2686655
This system has no unresolved violations. The most recent violation on record was 2023-10-01.
This system has more violations on record than 98% of water systems in Wisconsin.
Violation trend: 1.8 per year over the last 5 years, down from 6.0 per year in the previous 5.
System Details
| Population Served | 40 |
| Service Connections | 1 |
| Water Source | Groundwater |
| System Type | Non-Transient Non-Community |
| Owner | Private |
| Status | Active |
| City | Mukwonago |
| EPA ZIP on File | 53149 |
| Note | School or Daycare |
Areas Served
- Mukwonago, Waukesha County
Lead & Copper Testing
| Contaminant | Level | EPA Action Level | Status |
|---|---|---|---|
| Lead (90th percentile) | 0.0014 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0011 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0007 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0002 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0001 mg/L | 0.015 mg/L | Below Action Level |
| Lead (90th percentile) | 0.0001 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 (39 total)
| Contaminant | Violation | Date | Health-Based | Status |
|---|---|---|---|---|
| 5000 | MR | 2023-10-01 | Returned to Compliance | |
| 5000 | MR | 2023-10-01 | Returned to Compliance | |
| 1005 | MCL Measured: 0.0120 MG/L (limit: 0.0105 MG/L) | 2022-04-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0120 MG/L (limit: 0.0105 MG/L) | 2022-04-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0105 MG/L (limit: 0.0105 MG/L) | 2022-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0105 MG/L (limit: 0.0105 MG/L) | 2022-01-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0123 MG/L (limit: 0.0105 MG/L) | 2021-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0123 MG/L (limit: 0.0105 MG/L) | 2021-10-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0135 MG/L (limit: 0.0105 MG/L) | 2021-07-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0143 MG/L (limit: 0.0105 MG/L) | 2021-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0143 MG/L (limit: 0.0105 MG/L) | 2021-04-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0143 MG/L (limit: 0.0105 MG/L) | 2021-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0143 MG/L (limit: 0.0105 MG/L) | 2021-01-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0127 MG/L (limit: 0.0105 MG/L) | 2020-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0127 MG/L (limit: 0.0105 MG/L) | 2020-10-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0107 MG/L (limit: 0.0105 MG/L) | 2020-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0107 MG/L (limit: 0.0105 MG/L) | 2020-07-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0138 MG/L (limit: 0.0105 MG/L) | 2019-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0138 MG/L (limit: 0.0105 MG/L) | 2019-07-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0143 MG/L (limit: 0.0105 MG/L) | 2019-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0143 MG/L (limit: 0.0105 MG/L) | 2019-04-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0155 MG/L (limit: 0.0105 MG/L) | 2019-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0155 MG/L (limit: 0.0105 MG/L) | 2019-01-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0158 MG/L (limit: 0.0105 MG/L) | 2018-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0158 MG/L (limit: 0.0105 MG/L) | 2018-10-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0165 MG/L (limit: 0.0105 MG/L) | 2018-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0165 MG/L (limit: 0.0105 MG/L) | 2018-07-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0130 MG/L (limit: 0.0105 MG/L) | 2018-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0130 MG/L (limit: 0.0105 MG/L) | 2018-04-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0120 MG/L (limit: 0.0105 MG/L) | 2018-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0120 MG/L (limit: 0.0105 MG/L) | 2018-01-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0130 MG/L (limit: 0.0105 MG/L) | 2017-10-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0130 MG/L (limit: 0.0105 MG/L) | 2017-10-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0150 MG/L (limit: 0.0105 MG/L) | 2017-07-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0150 MG/L (limit: 0.0105 MG/L) | 2017-07-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0168 MG/L (limit: 0.0105 MG/L) | 2017-04-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0168 MG/L (limit: 0.0105 MG/L) | 2017-04-01 | Yes | Returned to Compliance |
| 1005 | MCL Measured: 0.0127 MG/L (limit: 0.0105 MG/L) | 2017-01-01 | Yes | Acknowledged |
| 1005 | MCL Measured: 0.0127 MG/L (limit: 0.0105 MG/L) | 2017-01-01 | Yes | Returned to Compliance |
Understanding This Water System's Record
Natures Classroom Institute Property LLC is a non-transient non-community water system that draws from groundwater sources and serves a population of 40 in Mukwonago, Wisconsin. 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.