KNOLLCREST TAX DISTRICT
PWS ID: CT0910081 · NEW FAIRFIELD, Connecticut 06812
Population Served
356
Total Violations
163
Health-Based Violations
17
Water Source
Groundwater
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 89
- County
- Fairfield
- School/Daycare
- No
- MCL Violations
- 12
- Monitoring Violations
- 116
- Treatment Tech Violations
- 5
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Consumer Confidence Rule | Other | 18 | 2025 |
| Combined Uranium | MR | 14 | 2017 |
| Combined Radium (-226 and -228) | MR | 14 | 2017 |
| Gross Alpha, Excl. Radon and U | MR | 14 | 2017 |
| Coliform (TCR) | MCL | 8 | 1997 |
| Revised Total Coliform Rule | MON | 8 | 2023 |
| Public Notice | Other | 8 | 2025 |
| Revised Total Coliform Rule | MCL | 4 | 2023 |
| Revised Total Coliform Rule | TT | 4 | 2023 |
| Lead and Copper Rule | MR | 4 | 2023 |
| Revised Total Coliform Rule | RPT | 4 | 2016 |
| BHC-GAMMA | MR | 2 | 2017 |
| Methoxychlor | MR | 2 | 2017 |
| Toxaphene | MR | 2 | 2017 |
| Dalapon | MR | 2 | 2017 |
| Diquat | MR | 2 | 2017 |
| Di(2-ethylhexyl) adipate | MR | 2 | 2017 |
| OXAMYL | MR | 2 | 2017 |
| Simazine | MR | 2 | 2017 |
| Di(2-ethylhexyl) phthalate | MR | 2 | 2017 |
| Picloram | MR | 2 | 2017 |
| Aldicarb sulfone | MR | 2 | 2017 |
| Carbofuran | MR | 2 | 2017 |
| Heptachlor | MR | 2 | 2017 |
| 2,4,5-TP | MR | 2 | 2017 |
| Pentachlorophenol | MR | 2 | 2017 |
| Benzo(a)pyrene | MR | 2 | 2017 |
| Total Polychlorinated Biphenyls (PCB) | MR | 2 | 2017 |
| 1,2-DIBROMO-3-CHLOROPROPANE | MR | 2 | 2017 |
| ETHYLENE DIBROMIDE | MR | 2 | 2017 |
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025.
This data is provided for informational purposes only.