Public water system · NY3420254
ActiveHidden Hollow
At a glance
Hidden Hollow (PWSID NY3420254) is an active community water system in Ontario County, New York. It reports serving 32 people through 18 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
32
Service connections
18
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Hidden Hollow compare with other water systems in Ontario County?
By EPA's size categories, Hidden Hollow is a very small system (500 people or fewer). Ontario County has 53 active public water systems. Its population served is well below the county average of 1,756 people per system, and accounts for less than 0.1% of the 93,056 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 Hidden 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 Hidden Hollow?
EPA lists Hidden 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. 26 of the 53 active systems in Ontario County (49%) are also privately owned.
Does Hidden Hollow have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 2023. The violations listed here began between June 2000 and January 2023. By type: 8 monitoring and reporting, 2 monitoring and 2 public notice, recordkeeping or other. The contaminant or rule involved most often is Total coliform bacteria (TCR) (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 |
|---|---|---|---|---|
| 2023-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Radium (-226 and -228)code 4010 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-226code 4020 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Radium-228code 4030 | No | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Combined Uraniumcode 4006 | No | Resolved |
| 2013-06-01 | Public notice, recordkeeping or otherOperations Report · code 10 | Not reported | No | Resolved |
| 2010-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2008-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2005-10-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 2000-06-01 | 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.
Hidden Hollow: frequently asked questions
Who runs Hidden Hollow?
Hidden Hollow (PWSID NY3420254) is a community water system privately owned. It is regulated by the NY state drinking water program.
How many people does Hidden Hollow serve?
Hidden Hollow reports serving 32 people through 18 service connections in Ontario County, New York.
Where does Hidden 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 Hidden Hollow 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 January 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 Hidden 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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in January 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 Hidden Hollow's water quality report?
As a community water system, Hidden 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 Ontario County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Geneva City | Ontario | 13,334 | Community | Surface water |
| Canandaigua-Farmington Consolidated W.D. | Ontario | 13,000 | Community | Purchased surface water |
| Canandaigua City | Ontario | 11,264 | Community | Surface water |
| Mcwa - Geneva | Ontario | 8,532 | Community | Purchased surface water |
| Canandaigua Town Cons. Wd | Ontario | 6,800 | Community | Purchased surface water |
| Hopewell Cons Wd 1 | Ontario | 3,781 | Community | Purchased 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, “Hidden Hollow, PWSID NY3420254, New York”, https://aquacensus.com/water-systems/new-york/hidden-hollow-ny3420254 (data as of October 1, 2026).