Public water system · NY5502499

Active

Onteora High School

At a glance

Onteora High School (PWSID NY5502499) is an active non-transient non-community water system in Ulster County, New York. It reports serving 1,300 people through 10 service connections. Its primary water source is groundwater, and EPA lists it as under public/private ownership. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

1,300

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDNY5502499

System typeNon-transient non-community water system

Activity statusActive

Population served1,300

Service connections10

Primary water sourceGroundwater

Owner typePublic/private partnership

Primacy agencyNY state drinking water program

City servedOlive (T)

StateNew York

ZIP—

CountyUlster County

How does Onteora High School compare with other water systems in Ulster County?

By EPA's size categories, Onteora High School is a small system (501 to 3,300 people). Ulster County has 446 active public water systems. Its population served is about 4.4 times the county average of 298 people per system, and accounts for 1% of the 133,020 people reported by systems filed under the county. Across New York, the 8,167 active systems average 2,374 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Onteora High School is about 3 times 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. New York has 704 active non-transient non-community water systems, 8.6% of the state's 8,167 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 7,096 New York systems (87%) list groundwater as their primary source.

Who owns and regulates Onteora High School?

EPA lists Onteora High School as under public/private ownership. The NY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 2 of the 446 active systems in Ulster County (0.4%) are also under public/private ownership.

Does Onteora High 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 October 2023. The violations listed here began between January 2004 and October 2023. By type: 10 monitoring and reporting and 2 public notice, recordkeeping or other. 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
2023-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2022-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2022-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2011-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2010-02-01	Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24	Total coliform bacteria (TCR)code 3100	No	Resolved
2009-07-01	Public notice, recordkeeping or otherOperations Report · code 10	Not reported	No	Resolved
2009-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2009-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2008-01-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2007-07-01	Public notice, recordkeeping or otherOperations Report · code 10	Not reported	No	Resolved
2005-09-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2004-01-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	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.

Onteora High School: frequently asked questions

Who runs Onteora High School?

Onteora High School (PWSID NY5502499) is a non-transient non-community water system under public/private ownership. It is regulated by the NY state drinking water program.

How many people does Onteora High School serve?

Onteora High School reports serving 1,300 people through 10 service connections in Ulster County, New York.

Where does Onteora High 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 Onteora High 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 October 2023. 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 Onteora High 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 October 2023. For current results, consult EPA ECHO, or the NY state drinking water program.

Where can I find Onteora High School's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Onteora High 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 Ulster County

Water system	County	Population served	Type	Source
Kingston (City) Water District	Ulster	24,000	Community	Surface water
New Paltz (Village) Water Dist	Ulster	7,523	Community	Surface water
Ulster Water District	Ulster	5,500	Community	Purchased surface water
Port Ewen Water District	Ulster	4,500	Community	Surface water
Ellenville (Village) Water Dis	Ulster	4,300	Community	Groundwater
Saugerties (Village) Water Dis	Ulster	4,200	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, “Onteora High School, PWSID NY5502499, New York”, https://aquacensus.com/water-systems/new-york/onteora-high-school-ny5502499 (data as of October 1, 2026).