Public water system · CT0340211
ActiveAquarion-Ken Oaks
At a glance
Aquarion-Ken Oaks (PWSID CT0340211) is an active community water system in Fairfield County, Connecticut. It reports serving 152 people through 57 service connections. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 9 violations for this system; none is health-based, and the most recent began in December 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
152
Service connections
57
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Aquarion-Ken Oaks compare with other water systems in Fairfield County?
By EPA's size categories, Aquarion-Ken Oaks is a very small system (500 people or fewer). Fairfield County has 337 active public water systems. Its population served is well below the county average of 2,311 people per system, and accounts for less than 0.1% of the 778,730 people reported by systems filed under the county. Across Connecticut, the 2,363 active systems average 1,247 people each. Nationally, the average active community water system reports serving 6,703 people, so Aquarion-Ken Oaks is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Connecticut has 481 active community water systems, 20% of the state's 2,363 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 52 Connecticut systems (2.2%) list purchased surface water as their primary source.
Who owns and regulates Aquarion-Ken Oaks?
EPA lists Aquarion-Ken Oaks 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. 286 of the 337 active systems in Fairfield County (85%) are also privately owned.
Does Aquarion-Ken Oaks have drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in December 2021. The violations listed here began between January 2004 and December 2021. By type: 5 monitoring and reporting and 4 public notice, recordkeeping or other. The contaminant or rule involved most often is Consumer Confidence Rule (4 of them). EPA lists 9 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2021-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2018-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2014-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Filter) · code 36 | Surface Water Treatment Rulecode 0200 | No | Resolved |
| 2012-04-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Chlorinecode 0999 | No | Resolved |
| 2010-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2008-08-10 | Public notice, recordkeeping or otherConsumer Confidence Report Inadequate Reporting · code 72 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2004-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Haloacetic acids (HAA5)code 2456 | No | Resolved |
All 9 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Aquarion-Ken Oaks: frequently asked questions
Who runs Aquarion-Ken Oaks?
Aquarion-Ken Oaks (PWSID CT0340211) is a community water system privately owned. It is regulated by the CT state drinking water program.
How many people does Aquarion-Ken Oaks serve?
Aquarion-Ken Oaks reports serving 152 people through 57 service connections in Fairfield County, Connecticut.
Where does Aquarion-Ken Oaks get its water?
EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.
Does Aquarion-Ken Oaks have any drinking water violations?
EPA's records list 9 violations for this system; none is health-based, and the most recent began in December 2021. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Aquarion-Ken Oaks' 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 records list 9 violations for this system; none is health-based, and the most recent began in December 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the CT state drinking water program.
Where can I find Aquarion-Ken Oaks' water quality report?
As a community water system, Aquarion-Ken Oaks must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
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 |
| Norwalk First Taxing District | Fairfield | 40,256 | Community | Surface water |
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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, “Aquarion-Ken Oaks, PWSID CT0340211, Connecticut”, https://aquacensus.com/water-systems/connecticut/aquarion-ken-oaks-ct0340211 (data as of October 1, 2026).