Public water system · NY2430063
ActiveTwin Rivers Lyonsdale
At a glance
Twin Rivers Lyonsdale (PWSID NY2430063) is an active non-transient non-community water system in Lewis County, New York. It reports serving 25 people through 1 service connection. 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 October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
1
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Twin Rivers Lyonsdale compare with other water systems in Lewis County?
By EPA's size categories, Twin Rivers Lyonsdale is a very small system (500 people or fewer). Lewis County has 67 active public water systems. Its population served is well below the county average of 246 people per system, and accounts for 0.2% of the 16,454 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 non-transient non-community water system reports serving 430 people, so Twin Rivers Lyonsdale is well below that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. New York has 704 active non-transient non-community water systems, 8.6% 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 Twin Rivers Lyonsdale?
EPA lists Twin Rivers Lyonsdale 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. 50 of the 67 active systems in Lewis County (75%) are also privately owned.
Does Twin Rivers Lyonsdale have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2023. The violations listed here began between January 2021 and October 2023. By type: 12 monitoring and reporting. The contaminants or rules involved are Lead and Copper Rule, Chlordane, Hexachlorobenzene and Fluoride. 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 |
|---|---|---|---|---|
| 2023-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chlordanecode 2959 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Hexachlorobenzenecode 2274 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nickelcode 1036 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Ethylene dibromide (EDB)code 2946 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Antimonycode 1074 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Seleniumcode 1045 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | cis-1,2-Dichloroethylenecode 2380 | No | Resolved |
| 2021-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Polychlorinated biphenyls (PCBs), totalcode 2383 | 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.
Twin Rivers Lyonsdale: frequently asked questions
Who runs Twin Rivers Lyonsdale?
Twin Rivers Lyonsdale (PWSID NY2430063) is a non-transient non-community water system privately owned. It is regulated by the NY state drinking water program.
How many people does Twin Rivers Lyonsdale serve?
Twin Rivers Lyonsdale reports serving 25 people through 1 service connection in Lewis County, New York.
Where does Twin Rivers Lyonsdale 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 Twin Rivers Lyonsdale 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 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 Twin Rivers Lyonsdale'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 October 2023. For current results, consult EPA ECHO, or the NY state drinking water program.
Where can I find Twin Rivers Lyonsdale's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Twin Rivers Lyonsdale is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.
Other water systems in Lewis County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Lowville Village | Lewis | 4,000 | Community | Surface water |
| Croghan Village | Lewis | 900 | Community | Groundwater |
| Copenhagen Village | Lewis | 850 | Community | Groundwater under influence of surface water |
| Lyons Falls Village | Lewis | 850 | Community | Groundwater |
| Port Leyden Village | Lewis | 820 | Community | Groundwater |
| Beaver Falls Water District | Lewis | 782 | Community | Purchased 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, “Twin Rivers Lyonsdale, PWSID NY2430063, New York”, https://aquacensus.com/water-systems/new-york/twin-rivers-lyonsdale-ny2430063 (data as of October 1, 2026).