Public water system · NY4100044

Active

Rensselaer City Pws

At a glance

Rensselaer City Pws (PWSID NY4100044) is an active community water system in Rensselaer County, New York. It reports serving 9,300 people through 3,200 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; 4 are health-based, and the most recent began in January 2022.

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

Population served

9,300

Service connections

3,200

Primary source

SWP

Purchased surface water

System type

CWS

Community water system

System record

PWSIDNY4100044

System typeCommunity water system

Activity statusActive

Population served9,300

Service connections3,200

Primary water sourcePurchased surface water

Owner typeLocal government

Primacy agencyNY state drinking water program

City servedRensselaer (C)

StateNew York

ZIP—

CountyRensselaer County

How does Rensselaer City Pws compare with other water systems in Rensselaer County?

By EPA's size categories, Rensselaer City Pws is a medium system (3,301 to 10,000 people). Rensselaer County has 146 active public water systems, and Rensselaer City Pws is the 4th-largest of them by population served. Its population served is about 10 times the county average of 926 people per system, and accounts for 6.9% 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 Rensselaer City Pws is about 39% 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 Rensselaer City Pws?

EPA lists Rensselaer City Pws 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 Rensselaer City Pws have drinking water violations?

EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in January 2022. The violations listed here began between September 1993 and January 2022. By type: 4 contaminant level above the legal limit, 3 public notice, recordkeeping or other and 2 monitoring and reporting. The contaminant or rule involved most often is Total trihalomethanes (TTHM) (5 of them). EPA lists 9 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
2022-01-01	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	Resolved
2018-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Total trihalomethanes (TTHM)code 2950	No	Resolved
2018-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Haloacetic acids (HAA5)code 2456	No	Resolved
2018-01-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2017-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Average · code 02	Total trihalomethanes (TTHM)code 2950	Yes	Resolved
2002-08-01	Public notice, recordkeeping or otherOperations Report · code 10	Not reported	No	Resolved
2000-07-01	Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71	Consumer Confidence Rulecode 7000	No	Resolved
1993-09-01	Public notice, recordkeeping or otherOperations Report · code 10	Not reported	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.

Rensselaer City Pws: frequently asked questions

Who runs Rensselaer City Pws?

Rensselaer City Pws (PWSID NY4100044) is a community water system owned by a local government. It is regulated by the NY state drinking water program.

How many people does Rensselaer City Pws serve?

Rensselaer City Pws reports serving 9,300 people through 3,200 service connections in Rensselaer County, New York.

Where does Rensselaer City Pws 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 Rensselaer City Pws have any drinking water violations?

EPA's records list 9 violations for this system; 4 are health-based, and the most recent began in January 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 Rensselaer City Pws' 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; 4 are health-based, and the most recent began in January 2022. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.

Where can I find Rensselaer City Pws' water quality report?

As a community water system, Rensselaer City Pws 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
Brunswick Consolidated Water District	Rensselaer	7,050	Community	Purchased surface water
Hoosick Falls (V) Pws	Rensselaer	4,925	Community	Groundwater
Grafton Lakes State Park	Rensselaer	2,500	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, “Rensselaer City Pws, PWSID NY4100044, New York”, https://aquacensus.com/water-systems/new-york/rensselaer-city-pws-ny4100044 (data as of October 1, 2026).