NORTH CASTLE WATER DISTRICT #4
PWSID: NY5922909 · Armonk, NY · Serves 1,225 people
NORTH CASTLE WATER DISTRICT #4 has 12 health-based violations out of 12 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
NORTH CASTLE WATER DISTRICT #4 (PWSID NY5922909) is a cws water system drawing from a groundwater source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 1,225 people in Armonk, NY, and is subject to primacy enforcement by the New York drinking-water program.
The system's federal compliance record contains 12 total violations, with 12 classified as health-based (MCL exceedances or treatment-technique failures). 2 distinct contaminants have been cited, including Dibutyl phthalate, Mercury. Recorded violations span 2017–2024.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time 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 (12)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Dibutyl phthalate | 8 | 8 |
| Mercury | 4 | 4 |
Violation History (12)
| Contaminant | Health | Date |
|---|---|---|
| Dibutyl phthalate | Yes | Oct 1, 2024 |
| Dibutyl phthalate | Yes | Jan 1, 2024 |
| Dibutyl phthalate | Yes | Apr 1, 2023 |
| Dibutyl phthalate | Yes | Jan 1, 2023 |
| Dibutyl phthalate | Yes | Oct 1, 2022 |
| Dibutyl phthalate | Yes | Jul 1, 2022 |
| Dibutyl phthalate | Yes | Apr 1, 2022 |
| Dibutyl phthalate | Yes | Jan 1, 2022 |
| Mercury | Yes | Oct 1, 2020 |
| Mercury | Yes | Jan 1, 2020 |
| Mercury | Yes | Oct 1, 2019 |
| Mercury | Yes | Jan 1, 2017 |
Frequently Asked Questions
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.