Public water system · CT0709153
ActiveHaddam Killingworth Inter/Middle School
At a glance
Haddam Killingworth Inter/Middle School (PWSID CT0709153) is an active non-transient non-community water system in Middlesex County, Connecticut. It reports serving 808 people through 1 service connection. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in May 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
808
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Haddam Killingworth Inter/Middle School compare with other water systems in Middlesex County?
By EPA's size categories, Haddam Killingworth Inter/Middle School is a small system (501 to 3,300 people). Middlesex County has 277 active public water systems. Its population served is about 129% above the county average of 353 people per system, and accounts for 0.8% of the 97,777 people reported by systems filed under the county. Across Connecticut, the 2,363 active systems average 1,247 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Haddam Killingworth Inter/Middle School is about 88% above that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Connecticut has 483 active non-transient non-community water systems, 20% 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 Haddam Killingworth Inter/Middle School?
EPA lists Haddam Killingworth Inter/Middle School as owned by a local government. 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. 45 of the 277 active systems in Middlesex County (16%) are also owned by a local government.
Does Haddam Killingworth Inter/Middle School have drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in May 2022. The violations listed here began between April 2008 and May 2022. By type: 8 monitoring and reporting, 2 public notice, recordkeeping or other, 1 required treatment not met and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 12 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 |
|---|---|---|---|---|
| 2022-05-21 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2021-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-07-10 | Required treatment not metTreatment Technique, Corrective/Expedited Actions (RTCR) · code 2C | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2016-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2015-08-15 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Resolved |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Resolved |
| 2014-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Methoxychlorcode 2015 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dibromo-3-chloropropane (DBCP)code 2931 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Alachlor (Lasso)code 2051 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarbcode 2047 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dinosebcode 2041 | No | Resolved |
The 12 most recent 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.
Haddam Killingworth Inter/Middle School: frequently asked questions
Who runs Haddam Killingworth Inter/Middle School?
Haddam Killingworth Inter/Middle School (PWSID CT0709153) is a non-transient non-community water system owned by a local government. It is regulated by the CT state drinking water program.
How many people does Haddam Killingworth Inter/Middle School serve?
Haddam Killingworth Inter/Middle School reports serving 808 people through 1 service connection in Middlesex County, Connecticut.
Where does Haddam Killingworth Inter/Middle School 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 Haddam Killingworth Inter/Middle School have any drinking water violations?
Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in May 2022. 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 Haddam Killingworth Inter/Middle School'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. Of the 12 most recent violations in EPA's records, 2 are health-based, and the most recent began in May 2022. For current results, consult EPA ECHO, or the CT state drinking water program.
Where can I find Haddam Killingworth Inter/Middle School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Haddam Killingworth Inter/Middle School is a non-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 Middlesex County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Middletown Water Department | Middlesex | 41,019 | Community | Surface water |
| Cromwell Fire District Water Department | Middlesex | 14,316 | Community | Groundwater |
| Ctwc - Shoreline Region-Chester System | Middlesex | 5,030 | Community | Surface water |
| Portland Water Department | Middlesex | 5,010 | Community | Purchased surface water |
| Connecticut Valley Hospital | Middlesex | 2,928 | Community | Surface water |
| Pratt & Whitney | Middlesex | 2,800 | 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, “Haddam Killingworth Inter/Middle School, PWSID CT0709153, Connecticut”, https://aquacensus.com/water-systems/connecticut/haddam-killingworth-inter-middle-school-ct0709153 (data as of October 1, 2026).