Treadwell Water District, NY
Lead detected, under the action levels
Latest 90th-percentile lead: 3.3 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.
About Treadwell Water District
Treadwell Water District serves about 164 people through 70 service connections, which makes it a very small system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws groundwater, in Delaware County, New York. EPA system ID: NY1200273; phone on file: 607-432-5510. They can tell you what your service line is made of and whether they pay to replace it.
Treadwell Water District's lead record
That is up 1.1 ppb from 2.2 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Treadwell Water District is 11.9 ppb across 19 monitoring periods, none of them over 15 ppb (1 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3.3 ppb |
| 2024 | 2.2 ppb |
| 2024 | 1.8 ppb |
| 2023 | 1.7 ppb |
| 2023 | 2.1 ppb |
| 2022 | 0 (not detected) |
| 2022 | 1.5 ppb |
| 2021 | 2.4 ppb |
| 2021 | 2.1 ppb |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2020 | 1 ppb |
| 2020 | 1 ppb |
| 2019 | 0 (not detected) |
| 2019 | 0 (not detected) |
| 2019 | 1 ppb |
| 2019 | 11.9 ppb over 10 |
| 2018 | 1.1 ppb |
| 2016 | 5 ppb |
How Treadwell Water District compares
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. Treadwell Water District's 3.3 ppb sits at the 77th percentile in New York and the 84th nationally (higher means more lead).
Nearby utilities
31 other systems share Delaware County; 4 of them have a higher latest lead result than Treadwell Water District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Delhi Village | 3,833 | 8.8 ppb |
| Sidney Village | 3,800 | 0 (not detected) |
| Walton Village | 3,010 | 0.7 ppb |
| Stamford Village | 1,280 | 1.8 ppb |
| Hancock Village | 1,182 | 3 ppb |
| Hobart Village | 700 | 3 ppb |
| Margaretville Village | 650 | 1.5 ppb |
| Downsville Water District | 617 | 1.5 ppb |
| Davenport Water District | 600 | 2.4 ppb |
| Roxbury Water District | 600 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Treadwell, 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 Treadwell Water District whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 3110 ppb (copper action level 1,300 ppb).
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. Size matters more than most people expect: small vs large water systems.