Public water system · CT0309144
ActiveCornerstone of Columbia
At a glance
Cornerstone of Columbia (PWSID CT0309144) is an active transient non-community water system in Tolland County, Connecticut. It reports serving 193 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
193
Service connections
1
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Cornerstone of Columbia compare with other water systems in Tolland County?
By EPA's size categories, Cornerstone of Columbia is a very small system (500 people or fewer). Tolland County has 296 active public water systems. Its population served is roughly in line with the county average of 202 people per system, and accounts for 0.3% of the 59,796 people reported by systems filed under the county. Across Connecticut, the 2,363 active systems average 1,247 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Cornerstone of Columbia is about 34% above that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Connecticut has 1,399 active transient non-community water systems, 59% of the state's 2,363 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 2,263 Connecticut systems (96%) list groundwater as their primary source.
Who owns and regulates Cornerstone of Columbia?
EPA lists Cornerstone of Columbia as privately owned. The CT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 253 of the 296 active systems in Tolland County (85%) are also privately owned.
Does Cornerstone of Columbia have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Cornerstone of Columbia. For the latest compliance status, check EPA ECHO for current compliance history.
Cornerstone of Columbia: frequently asked questions
Who runs Cornerstone of Columbia?
Cornerstone of Columbia (PWSID CT0309144) is a transient non-community water system privately owned. It is regulated by the CT state drinking water program.
How many people does Cornerstone of Columbia serve?
Cornerstone of Columbia reports serving 193 people through 1 service connection in Tolland County, Connecticut.
Where does Cornerstone of Columbia get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Cornerstone of Columbia have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Cornerstone of Columbia's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the CT state drinking water program.
Where can I find Cornerstone of Columbia's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Cornerstone of Columbia is a transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Tolland County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| University of Connecticut - Main Campus | Tolland | 27,199 | Community | Purchased surface water |
| Ctwc - Hebron Center Division | Tolland | 1,927 | Community | Groundwater |
| Coventry High & Nathan Hale Schools | Tolland | 1,252 | Non-transient non-community | Groundwater |
| Tolland Water Department | Tolland | 1,251 | Community | Groundwater |
| Ctwc - Amston Lake Division | Tolland | 910 | Community | Groundwater |
| Horace Porter School | Tolland | 797 | Non-transient non-community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Cornerstone of Columbia, PWSID CT0309144, Connecticut”, https://aquacensus.com/water-systems/connecticut/cornerstone-of-columbia-ct0309144 (data as of October 1, 2026).