B75/100
Chappaqua Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 17,116 residents · New York
What's In Chappaqua's Tap Water?
69
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2018.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Water Utility Details
NEW CASTLE/STANWOOD W.D.
Population Served
17,116
Water Source
Purchased Surface Water
System ID
NY5903442
Frequently Asked Questions About Chappaqua Water
Is Chappaqua tap water safe to drink?
Chappaqua, New York tap water receives a grade of B (75/100), which is considered good. Out of 69 contaminants tested, none exceed EPA maximum contaminant levels (MCLs). While the water meets federal standards, some residents may still choose to use a filter for additional peace of mind.
What contaminants are in Chappaqua's water?
69 contaminants were tested in Chappaqua's water supply. No contaminants exceed EPA legal limits (MCLs) or health goals (MCLGs), which is a positive indicator of water quality.
Does Chappaqua have any water quality violations?
Yes, Chappaqua has 21 EPA violation(s) on record, with the most recent in 2018. Violation types include MR, MCL. 1 of these are health-based violations, which are the most serious category.
Do I need a water filter in Chappaqua?
Chappaqua water meets EPA standards, so a filter is not strictly necessary. However, some residents prefer the added security of a water filter. EPA health goals (MCLGs) are stricter than legal limits and are set at levels with zero expected health risk. All contaminants are within health goals.
Where does Chappaqua's tap water come from?
Chappaqua's drinking water is sourced from purchased surface water and supplied by NEW CASTLE/STANWOOD W.D.. The system serves approximately 17,116 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Chappaqua's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Chappaqua's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Chappaqua's water compare to other cities in New York?
Chappaqua's water quality score of 75/100 earns a grade of B, which is considered good. This is an above-average score compared to many cities nationwide. Visit our New York state page to see how all cities in the state compare.
What should I do if I'm concerned about Chappaqua's water quality?
If you have concerns about Chappaqua's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (NEW CASTLE/STANWOOD W.D.) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.