Maryknoll, NY (10545): 2 Violations Recorded for Mapped Water Systems
EPA data for Ossining Water Department
EPA records for the water systems mapped to 10545 in Maryknoll, NY contain 2 recorded violations for inclusive record years 2021 through 2026, all mapped systems combined; 0 are marked health-based.
Data source: U.S. Environmental Protection Agency (EPA) SDWIS
At a Glance
- Water EPA records for water systems mapped to this ZIP show 2 violations (non-health) (since 2021).
- Lead The reported 90th-percentile lead result of 0.003 mg/L is below the EPA action level for water systems; EPA's health goal for lead is zero.
- PFAS At least one PFAS result is above an EPA MCL value (UCMR5 sampling; MCL compliance required from 2029).
- Radon EPA Zone 3 - county-level radon potential, not evidence of a low home result.
Get updates when new water-quality data is available for your area
Free alerts when new EPA data affects ZIP code 10545. No spam - just safety updates.
Unsubscribe anytime. We only send updates when your safety score changes. See our Privacy Policy.
See incorrect data? Let us know
Although the dataset for Maryknoll (10545) is limited in scope, one critical condition stands as the only elevated finding on record.
Score Breakdown
Overall Home Safety Score: Score unavailable
Required evidence is missing. Missing values remain unknown and are not imputed or renormalized.
Canonical components
Required domains
Coverage: 3 of 4 components and 2 of 3 domains observed.
Model 4.0.0; series home-safety-v4-cross-vertical.
Safety & Health (8) HIGH
Your Water System
ZIP code 10545 in Maryknoll, New York is mapped to the water system Ossining Water Department (EPA ID: NY5903451). This system provides water to approximately 30,000 people from surface water sources.
Other Water Quality Reports in New York
- 06390 (Fishers Island)
- 10001 (New York)
- 10002 (New York)
- 10003 (New York)
- 10004 (New York)
- 10005 (New York)
- 10006 (New York)
- 10007 (New York)
- 10008 (New York)
- 10009 (New York)
- 10010 (New York)
- 10011 (New York)
- 10012 (New York)
- 10013 (New York)
- 10014 (New York)
- 10015 (New York)
- 10016 (New York)
- 10017 (New York)
- 10018 (New York)
- 10019 (New York)
Nearby Water Quality Reports
- 10610 (White Plains) - <1 mi
- 10504 (Armonk) - 2 mi
- 10594 (Thornwood) - 2 mi - 6 violations recorded for mapped water systems
- 10570 (Pleasantville) - 3 mi - 7 violations recorded for mapped water systems
- 10571 (Pleasantville) - 3 mi
- 10572 (Pleasantville) - 3 mi
- 10595 (Valhalla) - 3 mi - 11 violations recorded for mapped water systems
- 10532 (Hawthorne) - 3 mi - 7 violations recorded for mapped water systems
- 10514 (Chappaqua) - 4 mi - 11 violations recorded for mapped water systems
- 10604 (West Harrison) - 4 mi - 3 violations recorded for mapped water systems
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Ossining Water Department (NY5903451) on EPA.gov.
4 of the top compounds applied across the surrounding county in USGS pesticide-use estimates appear on EPA drinking-water monitoring lists. See the agricultural pesticide-use section.
PFAS Contamination Detected
PFAS ("forever chemicals") have been reported in samples from water systems associated with ZIP code 10545. One or more compound results are above the level of a federal PFAS MCL with compliance required from 2029.
Detected compounds: PFOA.
Highest measured level: 0.0043 µg/L
Reverse osmosis (RO) and activated carbon block filters can reduce PFAS at the tap. Certifications list the compounds covered: an NSF/ANSI 53 or 58 claim for PFOA/PFOS does not cover every PFAS, so check that the product lists the compounds detected here.
Environmental Hazards (9) MODERATE
Home & Infrastructure (3) OK
Cost & Community (6) OK
CPSC product recall notices
These national notices are not matched to this ZIP code or water system.
Frequently Asked Questions
Is the tap water in 10545 safe to drink?
EPA SDWIS records 2 violations since 2021 across the water systems mapped to ZIP 10545 (primary system: Ossining Water Department), including 0 health-based. The violation table above shows which system each record belongs to. ZipCheckup last updated this page in July 2026. The federal source release date is unavailable, so that month is not presented as source currency.
Where does 10545's water come from?
The recorded water source for Ossining Water Department, a system mapped to ZIP code 10545, is Surface water. This system serves approximately 30,000 people.
How can I get my water tested in Maryknoll?
If Ossining Water Department supplies your home, contact it for its Consumer Confidence Report; otherwise contact the water utility that serves your address, or hire a certified lab for independent home water testing. The EPA recommends annual testing if you use a private well.
Is lead a concern in 10545 tap water?
The Lead and Copper Rule record selected for 10545 reports a 90th-percentile lead result of 0.003 mg/L for a water system mapped to this ZIP (record date 2025-12-31). The EPA action level is 0.015 mg/L. This result is below the EPA action level; it does not show the lead level in each home.
What is the radon risk for 10545?
10545 is mapped to a county in EPA Radon Zone 3 (low county-level radon potential; EPA recommends testing every home), located in Westchester County. EPA radon zones range from Zone 1 (highest county-level potential) to Zone 3 (lowest). Testing your home is recommended regardless of zone.
Are there PFAS (forever chemicals) in 10545's water?
Yes, PFAS have been detected in samples from water systems mapped to 10545. One or more PFAS results are above the level of a federal PFAS MCL with compliance required from 2029. Reverse osmosis and activated carbon filters certified to NSF/ANSI 53 or 58 specifically for PFOA/PFOS reduction can reduce PFAS.
How to cite this page
ZipCheckup. (2026). Maryknoll, NY (10545): 2 Violations Recorded for Mapped Water Systems. https://zipcheckup.com/report/10545/
@misc{zipcheckup-report-10545,
author = {{ZipCheckup}},
title = {{Maryknoll, NY (10545): 2 Violations Recorded for Mapped Water Systems}},
year = {2026},
url = {https://zipcheckup.com/report/10545/}
}
Page version: October 2026.
Nearby ZIP Code Reports
Water quality comparison for ZIP codes near 10545
| ZIP Code | City, State | Distance | Grade | Violations |
|---|---|---|---|---|
| 10610 | White Plains, NY | <1 mi | N/A | 0 |
| 10504 | Armonk, NY | 2.0 mi | N/A | 0 |
| 10594 | Thornwood, NY | 2.1 mi | A | 6 |
| 10570 | Pleasantville, NY | 2.9 mi | A | 7 |
| 10571 | Pleasantville, NY | 3.1 mi | N/A | 0 |
| 10572 | Pleasantville, NY | 3.1 mi | N/A | 0 |
| 10595 | Valhalla, NY | 3.3 mi | A | 11 |
| 10532 | Hawthorne, NY | 3.4 mi | A | 7 |
| 10514 | Chappaqua, NY | 4.1 mi | N/A | 11 |
| 10604 | West Harrison, NY | 4.1 mi | A | 3 |
Nearby ZIP Code Reports
2026 Rankings for Your Area
Overall safety breakdown
Home Safety Score →Find the right water filter
Water Filter Matcher →Compare filters, tests & services
Compare My Options →Compare with another ZIP
Compare Tool →2026 Rankings