MASHANTUCKET PEQUOT TRIBAL NATION
Connecticut - Community Water System - PWSID: CT0723011
System Information
| PWSID | CT0723011 |
| System Name | MASHANTUCKET PEQUOT TRIBAL NATION |
| System Type | Community Water System |
| Water Source | Ground Water Under Influence |
| Activity Status | Non-Inventory |
| Owner Type | Native American |
| EPA Region | 01 |
| Serves School | No |
| Wholesaler | No |
| First Reported | Jan 11, 2000 |
| Last Reported | Jun 29, 2026 |
Location & Contact
| State | Connecticut |
| City | MASHANTUCKET |
| ZIP Code | 06338-3249 |
| Address | 145 ROUTE 2 |
| Organization | GREENWOOD, KEN |
| Phone | 860-396-6780 |
Population & Service
| Population Served | 17,050 |
| Service Connections | 300 |
Drinking Water Violations (246)
This water system has 246 violations recorded in the EPA SDWIS database.
| Begin Date | End Date | Contaminant | Category | Health-Based | Major | Measured | Federal MCL | State MCL | Status | Return to Compliance | Rule |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Aug 10, 2025 | - | Other | No | No | - | - | - | Resolved | Nov 18, 2024 | - | |
| Jul 1, 2025 | - | Other | No | No | - | - | - | Resolved | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.0002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.2 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.7 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.006 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | - | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.07 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.003 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | - | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.003 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.0005 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.007 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.004 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | - | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.2 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.004 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.07 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.04 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.0002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.05 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.05 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | - | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.04 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.05 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.001 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.4 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.007 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.00005 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.003 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.5 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.0005 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.006 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | Yes | - | 0.7 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.2 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.0002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.003 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.4 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | - | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.05 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.2 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.5 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.0002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | - | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.002 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.00005 mg/L | - | Archived | Nov 18, 2024 | - | |
| Jan 1, 2023 | Dec 31, 2025 | MR | No | No | - | 0.001 mg/L | - | Archived | Nov 18, 2024 | - |
About This Water System
Public water system data comes from the EPA Safe Drinking Water Information System (SDWIS). Systems with violations must notify customers. Contact your water utility for the latest annual water quality report.