Public water system · CT0859134
ActiveGreat Hollow Lake
Transient non-community water system in Fairfield County, Connecticut, drawing primarily on groundwater.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
35
Service connections
4
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
Violations & enforcement
| Began | Violation | Contaminant | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | 3A | 8000 | No | Archived |
| 2025-10-01 | 19 | 3014 | No | Archived |
| 2024-04-01 | 19 | 3014 | No | Resolved |
| 2023-07-13 | 75 | 7500 | No | Resolved |
| 2023-04-01 | 3A | 8000 | No | Resolved |
| 2022-09-13 | 2A | 8000 | Yes | Resolved |
| 2022-09-13 | 75 | 7500 | No | Resolved |
| 2022-04-01 | 3A | 8000 | No | Resolved |
| 2021-09-01 | 1A | 8000 | Yes | Resolved |
| 2021-08-07 | 2B | 8000 | Yes | Resolved |
| 2020-08-08 | 2A | 8000 | Yes | Resolved |
Great Hollow Lake: frequently asked questions
Is Great Hollow Lake's water safe to drink?
Great Hollow Lake is an active transient non-community water system regulated under the Safe Drinking Water Act, overseen by the CT state drinking water program. EPA SDWA violation and enforcement records for this system are being added to AquaCensus from EPA ECHO; consult EPA ECHO or your annual Consumer Confidence Report for its current compliance status.
Who runs Great Hollow Lake?
Great Hollow Lake (PWSID CT0859134) is a local government-owned transient non-community water system, regulated by the CT state drinking water program.
How many people does Great Hollow Lake serve?
Great Hollow Lake reports serving 35 people through 4 service connections in Fairfield County, Connecticut.
Where does Great Hollow Lake get its water?
EPA SDWIS lists this system's primary water source as groundwater.
Other water systems in Fairfield County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Aquarion-Eastern Fairfield County | Fairfield | 351,756 | Community | Surface water |
| Aquarion-Stamford | Fairfield | 119,214 | Community | Surface water |
| Danbury Water Department | Fairfield | 62,055 | Community | Surface water |
| Aquarion-Greenwich | Fairfield | 53,297 | Community | Surface water |
| South Norwalk Electric & Water | Fairfield | 42,000 | Community | Surface water |
| Lancaster City Pws | Fairfield | 40,400 | Community | Groundwater |