Public water system · NY3920091
ActiveDorset Hollow
At a glance
Dorset Hollow (PWSID NY3920091) is an active community water system in Putnam County, New York. It reports serving 93 people through 32 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2007.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
93
Service connections
32
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Dorset Hollow compare with other water systems in Putnam County?
By EPA's size categories, Dorset Hollow is a very small system (500 people or fewer). Putnam County has 382 active public water systems. Its population served is about 38% below the county average of 150 people per system, and accounts for 0.2% of the 57,156 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 Dorset Hollow 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. 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 Dorset Hollow?
EPA lists Dorset Hollow as privately owned. 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. 342 of the 382 active systems in Putnam County (90%) are also privately owned.
Does Dorset Hollow have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2007. By type: 1 monitoring and reporting. The contaminant or rule involved is Lead and Copper Rule. EPA lists 1 as addressed. Addressed means the violation is not resolved or archived and is covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2007-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Addressed |
The one violation in EPA's records.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.
Dorset Hollow: frequently asked questions
Who runs Dorset Hollow?
Dorset Hollow (PWSID NY3920091) is a community water system privately owned. It is regulated by the NY state drinking water program.
How many people does Dorset Hollow serve?
Dorset Hollow reports serving 93 people through 32 service connections in Putnam County, New York.
Where does Dorset Hollow 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 Dorset Hollow have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in October 2007. 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 Dorset Hollow'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 one violation for this system; it is not health-based, and the most recent began in October 2007. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Dorset Hollow's water quality report?
As a community water system, Dorset Hollow 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 Putnam County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Carmel Wd 2 | Putnam | 5,000 | Community | Surface water |
| Mahopac School Complex (Falls, Mms, Mhs) | Putnam | 3,200 | Non-transient non-community | Groundwater |
| Cold Spring Village | Putnam | 2,666 | Community | Surface water |
| Brewster Village | Putnam | 2,162 | Community | Groundwater |
| Continental Village Wd | Putnam | 1,509 | Community | Purchased surface water |
| Mount Ebo Ws | Putnam | 1,500 | 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, “Dorset Hollow, PWSID NY3920091, New York”, https://aquacensus.com/water-systems/new-york/dorset-hollow-ny3920091 (data as of October 1, 2026).