Public water system · NY4130338
ActivePoestenkill Wd#1
At a glance
Poestenkill Wd#1 (PWSID NY4130338) is an active community water system in Rensselaer County, New York. It reports serving 752 people through 338 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's records list 9 violations for this system; 7 are health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
752
Service connections
338
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Poestenkill Wd#1 compare with other water systems in Rensselaer County?
By EPA's size categories, Poestenkill Wd#1 is a small system (501 to 3,300 people). Rensselaer County has 146 active public water systems. Its population served is about 19% below the county average of 926 people per system, and accounts for 0.6% of the 135,123 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 Poestenkill Wd#1 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. 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 Poestenkill Wd#1?
EPA lists Poestenkill Wd#1 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. 24 of the 146 active systems in Rensselaer County (16%) are also owned by a local government.
Does Poestenkill Wd#1 have drinking water violations?
EPA's records list 9 violations for this system; 7 are health-based, and the most recent began in October 2023. The violations listed here began between January 2011 and October 2023. By type: 7 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (8 of them). EPA lists 8 as resolved and 1 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Total trihalomethanes (TTHM)code 2950 | No | Resolved |
| 2022-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2021-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2021-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2021-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Archived |
| 2013-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2012-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2012-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02 | Total trihalomethanes (TTHM)code 2950 | Yes | Resolved |
| 2011-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Poestenkill Wd#1: frequently asked questions
Who runs Poestenkill Wd#1?
Poestenkill Wd#1 (PWSID NY4130338) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Poestenkill Wd#1 serve?
Poestenkill Wd#1 reports serving 752 people through 338 service connections in Rensselaer County, New York.
Where does Poestenkill Wd#1 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 Poestenkill Wd#1 have any drinking water violations?
EPA's records list 9 violations for this system; 7 are 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 Poestenkill Wd#1'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. EPA's records list 9 violations for this system; 7 are health-based, and the most recent began in October 2023. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Poestenkill Wd#1's water quality report?
As a community water system, Poestenkill Wd#1 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 Rensselaer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Troy City Pws | Rensselaer | 51,401 | Community | Surface water |
| East Greenbush General W.D. | Rensselaer | 15,843 | Community | Purchased surface water |
| North Greenbush Consolidated District | Rensselaer | 10,226 | Community | Purchased surface water |
| Rensselaer City Pws | Rensselaer | 9,300 | Community | Purchased surface water |
| Brunswick Consolidated Water District | Rensselaer | 7,050 | Community | Purchased surface water |
| Hoosick Falls (V) Pws | Rensselaer | 4,925 | 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, “Poestenkill Wd#1, PWSID NY4130338, New York”, https://aquacensus.com/water-systems/new-york/poestenkill-wd-1-ny4130338 (data as of October 1, 2026).