Knolls Water Co., Inc., NY
Exceeded the action level in the past
Latest 90th-percentile lead: 1 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. The latest result is under the action level, but this system has gone over 15 ppb before. Lead comes from pipes, not the source water, so a home with a lead service line can still be exposed. Test your own tap.
Knolls Water Co., Inc. at a glance
Knolls Water Co., Inc. serves about 230 people through 79 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Orange County, New York. EPA system ID: NY3503563; phone on file: 845-620-6221. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Knolls Water Co., Inc.'s lead record
That is down 1.43 ppb from 2.43 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Knolls Water Co., Inc. is 18.9 ppb across 11 monitoring periods, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 1 ppb |
| 2024 | 2.43 ppb |
| 2023 | 4 ppb |
| 2022 | 1.9 ppb |
| 2021 | 2 ppb |
| 2020 | 2.7 ppb |
| 2020 | 3.2 ppb |
| 2019 | 18.9 ppb over 15 |
| 2018 | 5 ppb |
| 2017 | 3 ppb |
| 2016 | 2.85 ppb |
How Knolls Water Co., Inc. 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. Knolls Water Co., Inc.'s 1 ppb sits at the 32nd percentile in New York and the 52nd nationally (higher means more lead).
Neighbouring systems
129 other systems share Orange County; 85 of them have a higher latest lead result than Knolls Water Co., Inc.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Kiryas Joel | 51,623 | 9 ppb |
| Middletown City | 30,000 | 1 ppb |
| Newburgh City | 29,000 | 1.5 ppb |
| New Windsor Consolidated Wd | 25,667 | 0 (not detected) |
| Newburgh Consolidated Wd | 22,282 | 1.5 ppb |
| Wallkill Consolidated Wd | 18,450 | 1.97 ppb |
| Monroe Village | 12,000 | 3 ppb |
| Woodbury Cons. W.D. | 10,845 | 8.5 ppb |
| Cornwall-On-Hudson | 9,700 | 1 ppb |
| Port Jervis City | 9,000 | 3.04 ppb |
Next steps for West Nyack, NY
Test your own tap with a certified lab first-draw sample; West Nyack, 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 Knolls Water Co., Inc. 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. Why an old exceedance still matters: over the limit before, under it now.