Public water system · CT1661262
ActiveTyrrell Middle School
At a glance
Tyrrell Middle School (PWSID CT1661262) is an active non-transient non-community water system in New Haven County, Connecticut. It reports serving 454 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, none is health-based, and the most recent began in August 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
454
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Tyrrell Middle School compare with other water systems in New Haven County?
By EPA's size categories, Tyrrell Middle School is a very small system (500 people or fewer). New Haven County has 212 active public water systems. Its population served is well below the county average of 3,412 people per system, and accounts for less than 0.1% of the 723,334 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 Tyrrell Middle School is roughly in line with 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 Tyrrell Middle School?
EPA lists Tyrrell 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. 32 of the 212 active systems in New Haven County (15%) are also owned by a local government.
Does Tyrrell Middle School have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2025. The violations listed here began between January 2005 and August 2025. By type: 10 monitoring and reporting, 1 monitoring and 1 reporting. The contaminant or rule involved most often is E. coli (2 of them). EPA lists 9 as resolved and 3 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-08-06 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Unaddressed |
| 2016-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2016-08-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-07-15 | Monitoring and reportingMonitoring, Source Water (GWR) · code 34 | E. colicode 3014 | No | Unaddressed |
| 2016-07-08 | ReportingReporting, Assessment Forms (RTCR) · code 4A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | p-Dichlorobenzenecode 2969 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlorobenzenecode 2989 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Dichloromethanecode 2964 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | 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.
Tyrrell Middle School: frequently asked questions
Who runs Tyrrell Middle School?
Tyrrell Middle School (PWSID CT1661262) 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 Tyrrell Middle School serve?
Tyrrell Middle School reports serving 454 people through 1 service connection in New Haven County, Connecticut.
Where does Tyrrell 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 Tyrrell Middle School have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in August 2025. 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 Tyrrell 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, none is health-based, and the most recent began in August 2025. For current results, consult EPA ECHO, or the CT state drinking water program.
Where can I find Tyrrell Middle School's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Tyrrell 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 New Haven County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Regional Water Authority | New Haven | 418,900 | Community | Surface water |
| Waterbury Water Department | New Haven | 107,271 | Community | Surface water |
| Meriden Water Division | New Haven | 58,441 | Community | Surface water |
| Wallingford Water Department | New Haven | 37,267 | Community | Surface water |
| Ctwc - Shoreline Region-Guilford System | New Haven | 33,975 | Community | Surface water |
| Ctwc - Naugatuck Region-Central System | New Haven | 22,735 | Community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Tyrrell Middle School, PWSID CT1661262, Connecticut”, https://aquacensus.com/water-systems/connecticut/tyrrell-middle-school-ct1661262 (data as of October 1, 2026).