NORTH CASTLE WATER DISTRICT #4
PWSID: NY5922909 · Armonk, NY · Serves 1,225 people
According to EPA Safe Drinking Water Information System (SDWIS), NORTH CASTLE WATER DISTRICT #4 (PWSID NY5922909) in Armonk, NY is listed as a CWS water system covering about 1,225 people. The same extract lists 20 health-based violation records spanning 2017-2025. Those 20 health-based rows for NORTH CASTLE WATER DISTRICT #4 cover contaminants such as PERFLUOROCTANOIC ACID (PFOA), Manganese, PERFLUOROCTANE SULFONIC ACID (PFOS); they remain historical EPA registry entries, not a current compliance or drinkability score.
NORTH CASTLE WATER DISTRICT #4 has 20 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 3 distinct EPA contaminant codes appear in this system's record, including PERFLUOROCTANOIC ACID (PFOA), Manganese, PERFLUOROCTANE SULFONIC ACID (PFOS). Recorded violations span 2017–2025. Day-to-day primacy enforcement for this system runs through the New York drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the New York state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- NY5922909
- System Type
- CWS
- Water Source
- Groundwater
- Location
- Armonk, NY
- Population Served
- 1,225
- Health Violations
- Yes (20)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| PERFLUOROCTANOIC ACID (PFOA) | 14 | 14 |
| Manganese | 4 | 4 |
| PERFLUOROCTANE SULFONIC ACID (PFOS) | 2 | 2 |
Violation History (20)
| Contaminant | Health | Date |
|---|---|---|
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Oct 1, 2025 |
| PERFLUOROCTANE SULFONIC ACID (PFOS) | Yes | Oct 1, 2025 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Jul 1, 2025 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Apr 1, 2025 |
| PERFLUOROCTANE SULFONIC ACID (PFOS) | Yes | Apr 1, 2025 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Apr 1, 2025 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Jan 1, 2025 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Oct 1, 2024 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Oct 1, 2024 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Jan 1, 2024 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Apr 1, 2023 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Jan 1, 2023 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Oct 1, 2022 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Jul 1, 2022 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Apr 1, 2022 |
| PERFLUOROCTANOIC ACID (PFOA) | Yes | Jan 1, 2022 |
| Manganese | Yes | Oct 1, 2020 |
| Manganese | Yes | Jan 1, 2020 |
| Manganese | Yes | Oct 1, 2019 |
| Manganese | Yes | Jan 1, 2017 |
Frequently Asked Questions
What does EPA SDWIS list for NORTH CASTLE WATER DISTRICT #4?
How many people does NORTH CASTLE WATER DISTRICT #4 serve?
What violations does NORTH CASTLE WATER DISTRICT #4 have?
What contaminants have been found in NORTH CASTLE WATER DISTRICT #4 water?
Compare beyond New York
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest NORTH CASTLE WATER DISTRICT #4 on cumulative violation count (20) and EPA-reported population served (1,225). Violation-count peers include Yerington (Campbell Ranch), GENTRY WATERWORKS, MULBERRY WATERWORKS. Population peers include San Pasqual District A, BRECKENRIDGE UNION WATER ASSOC, ROLLING GREEN UTILITIES, INC..
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Similar population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ gate).
Nearby Water Systems
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About This Data
NORTH CASTLE WATER DISTRICT #4 (NY5922909) is drawn from EPA SDWIS. Nearby county systems in this extract include NEW YORK CITY SYSTEM; YONKERS CITY; GREENBURGH CONSOLIDATED WD #1; MOUNT VERNON WATER DEPARTMENT. Health-based rows (20 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.