Four Winds Hospital, NY
Lead detected, under the action levels
Latest 90th-percentile lead: 2.75 ppb (monitoring period 2025-2027). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Who runs the water here
Four Winds Hospital serves about 400 people through 26 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Westchester County, New York. EPA system ID: NY5930031. Ask the utility on your bill for your address in their service line inventory.
Four Winds Hospital's lead record
That is down 5.1 ppb from 7.85 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Four Winds Hospital is 7.85 ppb across 4 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2027 | 2.75 ppb |
| 2024 | 7.85 ppb |
| 2021 | 2 ppb |
| 2018 | 4.8 ppb |
Where this result ranks
Of the 2,077 New York systems with a lead result, the median latest reading is 1.5 ppb; 17 are over 15 ppb right now and 165 have gone over at some point. Four Winds Hospital's 2.75 ppb sits at the 70th percentile in New York and the 79th nationally (higher means more lead).
Other water systems in Westchester County
89 other systems share Westchester County; 25 of them have a higher latest lead result than Four Winds Hospital. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Yonkers City | 211,569 | 7.14 ppb |
| Veolia Water New York, Inc. Rd-1 | 146,732 | 12.2 ppb |
| Mount Vernon Water Department | 73,893 | 7.12 ppb |
| Westchester Joint Water Works | 59,629 | 3 ppb |
| White Plains City | 59,559 | 1.25 ppb |
| Veolia Water New York, Inc. Rd-2 | 57,301 | 2 ppb |
| Greenburgh Consolidated Wd #1 | 43,312 | 1.29 ppb |
| Yorktown Consold. Water Dist.#1 | 36,000 | 1.2 ppb |
| Ossining Water Department | 30,000 | 3 ppb |
| Cortlandt Consolidated Wd | 28,369 | 1.4 ppb |
Next steps for Katonah, NY
Test your own tap with a certified lab first-draw sample; Katonah, NY may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Four Winds Hospital whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. Why sampled homes are the worst-case ones is in the guide to reading the number. The action level is dropping - the 10 ppb rule from 2027.