- EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
- Lithium: found in 2 of 6 samples, average 4.15 µg/L, highest 13.6 µg/L (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- PFPeA (a PFAS): found in 1 of 6 samples, average 0.50 ppt, highest 3.1 ppt (EPA UCMR 5 testing, Mar 2024–Dec 2024)
- Lead, 90th percentile: 1 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jul 1, 2025–Dec 31, 2025). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
- Health-based violation: Groundwater Rule, Groundwater Rule, Nov 2024–Jun 2025 (EPA SDWIS)
Public EPA test results
Can you drink Mount Kisco tap water? What EPA records show
EPA NY5903437 · serves Mount Kisco (V), NY · about 11,187 people (EPA SDWIS)
This report shows EPA's federal records for this water system: UCMR 5 testing, lead testing and violations. It isn't a test of the water at your tap, and it has no Water Score.
Public EPA test results
Mount Kisco Water Department (EPA NY5903437)
ScoreYourWater.com gives no verdict on your tap water; it shows what the public records say, as of October 14, 2026. For Mount Kisco's main utility, Mount Kisco Water Department: 1 health-based violation since July 1, 2021 in EPA records (EPA SDWIS). PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
What EPA records show for Mount Kisco Water Department, as of October 14, 2026
Health-based violation: Groundwater Rule, Groundwater Rule, Nov 2024–Jun 2025 (EPA SDWIS).
Lead, 90th percentile: 1 ppb at the latest result in EPA records for a monitoring period that ran on or after July 1, 2021, at or below EPA's 15 ppb action level (EPA SDWIS, monitoring period Jul 1, 2025–Dec 31, 2025). The 90th percentile is a system-wide measure from homes sampled under EPA's lead rule; it isn't a result for your home.
EPA's UCMR 5 testing looked for 30 contaminants here and found 2.
PFOA and PFOS were not detected at or above EPA's reporting level in EPA's UCMR 5 testing.
Source: EPA records (SDWIS, UCMR 5). SDWIS: data as of Oct 14, 2026. EPA UCMR 5 data, samples through June 2026.
Your water bill names your utility.
Does Mount Kisco Water Department use chloramine?
We didn't find chloramine in Mount Kisco Water Department's EPA treatment records. That's not a complete list; your utility's annual water quality report says which disinfectant it uses.
What EPA records show for this system
Reported results in EPA records (data as of Oct 14–15, 2026)