Ossining Water Department, NY
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2025-2025). 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.
Ossining Water Department at a glance
Ossining Water Department serves about 30,000 people through 6,600 service connections, which makes it a large system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Westchester County, New York. EPA system ID: NY5903451; phone on file: 914-941-3554. Ask them for your address in their service line inventory - every system had to publish one by Oct 2024.
Every lead result on file
Against the period ending 2025 (2.3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Ossining Water Department is 13.4 ppb across 14 monitoring periods, none of them over 15 ppb (3 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2025 | 2.3 ppb |
| 2024 | 6.4 ppb |
| 2023 | 7.5 ppb |
| 2022 | 8 ppb |
| 2021 | 4.5 ppb |
| 2020 | 11 ppb over 10 |
| 2020 | 5.2 ppb |
| 2019 | 9.9 ppb |
| 2019 | 10.3 ppb over 10 |
| 2019 | 7.95 ppb |
| 2018 | 8.2 ppb |
| 2018 | 13.4 ppb over 10 |
| 2016 | 9.81 ppb |
Against other New York systems
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. Ossining Water Department's 3 ppb sits at the 75th percentile in New York and the 83rd nationally (higher means more lead).
Nearby utilities
89 other systems share Westchester County; 17 of them have a higher latest lead result than Ossining Water Department. 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 |
| Cortlandt Consolidated Wd | 28,369 | 1.4 ppb |
| Peekskill City | 24,272 | 2 ppb |
Next steps for Ossining, NY
Test your own tap with a certified lab first-draw sample; Ossining, 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 Ossining Water Department 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. The lead result guide covers how utilities pick the homes they sample. Systems that went over once often dip back under; here is what that means.