Public water system · NY4519111
ActiveHalfmoon Water District (Troy)
At a glance
Halfmoon Water District (Troy) (PWSID NY4519111) is an active community water system in Saratoga County, New York. It reports serving 15,000 people through 7,000 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
15,000
Service connections
7,000
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Halfmoon Water District (Troy) compare with other water systems in Saratoga County?
By EPA's size categories, Halfmoon Water District (Troy) is a large system (10,001 to 100,000 people). Saratoga County has 216 active public water systems, and Halfmoon Water District (Troy) is the 3rd-largest of them by population served. Its population served is about 16 times the county average of 916 people per system, and accounts for 7.6% of the 197,820 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 community water system reports serving 6,703 people, so Halfmoon Water District (Troy) is about 124% above 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. New York has 2,281 active community water systems, 28% of the state's 8,167 active systems. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 399 New York systems (4.9%) list purchased surface water as their primary source.
Who owns and regulates Halfmoon Water District (Troy)?
EPA lists Halfmoon Water District (Troy) as owned by a local government. 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. 30 of the 216 active systems in Saratoga County (14%) are also owned by a local government.
Does Halfmoon Water District (Troy) have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2016. The violations listed here began between February 1993 and January 2016. By type: 7 monitoring and reporting, 3 contaminant level above the legal limit and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 9 as resolved and 3 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2016-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-09-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2007-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2006-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Haloacetic acids (HAA5)code 2456 | Yes | Resolved |
| 2006-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2006-02-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 2006-02-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | No | Resolved |
| 1995-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Archived |
| 1993-03-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-03-01 | Public notice, recordkeeping or otherOperations Report · code 10 | Not reported | No | Resolved |
| 1993-02-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-02-01 | Public notice, recordkeeping or otherOperations Report · code 10 | Not reported | 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.
Halfmoon Water District (Troy): frequently asked questions
Who runs Halfmoon Water District (Troy)?
Halfmoon Water District (Troy) (PWSID NY4519111) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Halfmoon Water District (Troy) serve?
Halfmoon Water District (Troy) reports serving 15,000 people through 7,000 service connections in Saratoga County, New York.
Where does Halfmoon Water District (Troy) 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 Halfmoon Water District (Troy) have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in January 2016. 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 Halfmoon Water District (Troy)'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, 3 are health-based, and the most recent began in January 2016. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Halfmoon Water District (Troy)'s water quality report?
As a community water system, Halfmoon Water District (Troy) 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 Saratoga County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Clifton Park Water Authority | Saratoga | 35,000 | Community | Purchased surface water |
| Saratoga Springs City | Saratoga | 26,525 | Community | Surface water |
| Burnt Hills-Ballston Lk Wd | Saratoga | 10,000 | Community | Purchased surface water |
| Waterford Water Works (Purchase Troy) | Saratoga | 9,800 | Community | Purchased surface water |
| Wilton Water & Sewer Authority | Saratoga | 9,490 | Community | Purchased surface water |
| Malta Water District #1 | Saratoga | 8,950 | 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, “Halfmoon Water District (Troy), PWSID NY4519111, New York”, https://aquacensus.com/water-systems/new-york/halfmoon-water-district-troy-ny4519111 (data as of October 1, 2026).