MARIANAPOLIS PREP SCHOOL - ST JOHNS
PWS ID: CT1410051 · THOMPSON, Connecticut 06277
Population Served
128
Total Violations
424
Health-Based Violations
43
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 1
- County
- Windham
- School/Daycare
- No
- MCL Violations
- 42
- Monitoring Violations
- 321
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MR | 53 | 2006 |
| Chlorine | MR | 43 | 2007 |
| Coliform (TCR) | MCL | 42 | 2007 |
| Consumer Confidence Rule | Other | 23 | 2019 |
| Gross Alpha, Excl. Radon and U | MR | 18 | 2006 |
| Combined Radium (-226 and -228) | MR | 18 | 2006 |
| Combined Uranium | MR | 18 | 2006 |
| Public Notice | Other | 7 | 2008 |
| BHC-GAMMA | MR | 4 | 2007 |
| Toxaphene | MR | 4 | 2007 |
| Aldicarb sulfoxide | MR | 4 | 2007 |
| Carbofuran | MR | 4 | 2007 |
| Atrazine | MR | 4 | 2007 |
| LASSO | MR | 4 | 2007 |
| 2,4-D | MR | 4 | 2007 |
| 2,4,5-TP | MR | 4 | 2007 |
| Pentachlorophenol | MR | 4 | 2007 |
| Chlordane | MR | 4 | 2007 |
| Diquat | MR | 4 | 2007 |
| Di(2-ethylhexyl) phthalate | MR | 4 | 2007 |
| Dinoseb | MR | 4 | 2007 |
| HEXACHLOROBENZENE | MR | 4 | 2007 |
| Benzo(a)pyrene | MR | 4 | 2007 |
| Heptachlor | MR | 4 | 2007 |
| ETHYLENE DIBROMIDE | MR | 4 | 2007 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 4 | 2007 |
| Picloram | MR | 4 | 2007 |
| Dalapon | MR | 4 | 2007 |
| Aldicarb | MR | 4 | 2007 |
| OXAMYL | MR | 4 | 2007 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.