Public water system · NY1404543
ActiveEcwa West Seneca
At a glance
Ecwa West Seneca (PWSID NY1404543) is an active community water system in Erie County, New York. It reports serving 23,557 people through 9,441 service connections. Its primary water source is purchased surface water, and EPA lists it as owned by a local government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
23,557
Service connections
9,441
Primary source
SWP
Purchased surface water
System type
CWS
Community water system
System record
How does Ecwa West Seneca compare with other water systems in Erie County?
By EPA's size categories, Ecwa West Seneca is a large system (10,001 to 100,000 people). Erie County has 108 active public water systems. Its population served is about 166% above the county average of 8,858 people per system, and accounts for 2.5% of the 956,649 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 Ecwa West Seneca is about 3.5 times 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 Ecwa West Seneca?
EPA lists Ecwa West Seneca 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. 36 of the 108 active systems in Erie County (33%) are also owned by a local government.
Does Ecwa West Seneca have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Ecwa West Seneca. For the latest compliance status, check EPA ECHO for current compliance history.
Ecwa West Seneca: frequently asked questions
Who runs Ecwa West Seneca?
Ecwa West Seneca (PWSID NY1404543) is a community water system owned by a local government. It is regulated by the NY state drinking water program.
How many people does Ecwa West Seneca serve?
Ecwa West Seneca reports serving 23,557 people through 9,441 service connections in Erie County, New York.
Where does Ecwa West Seneca 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 Ecwa West Seneca have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Ecwa West Seneca'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 Safe Drinking Water Act records list no violations for this system. For current results, consult the system's annual water quality report, EPA ECHO, or the NY state drinking water program.
Where can I find Ecwa West Seneca's water quality report?
As a community water system, Ecwa West Seneca 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 Erie County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Ecwa Direct | Erie | 313,380 | Community | Surface water |
| Buffalo Water Authority | Erie | 276,000 | Community | Surface water |
| Ecwa Amherst | Erie | 92,697 | Community | Purchased surface water |
| Tonawanda, Town Water Dept. | Erie | 72,571 | Community | Surface water |
| Ecwa Lancaster | Erie | 29,018 | Community | Purchased surface water |
| Ecwa Orchard Park | Erie | 24,582 | 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, “Ecwa West Seneca, PWSID NY1404543, New York”, https://aquacensus.com/water-systems/new-york/ecwa-west-seneca-ny1404543 (data as of October 1, 2026).