London Bridge Water Works, NY
Exceeded the action level in the past
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. 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.
London Bridge Water Works at a glance
London Bridge Water Works serves about 224 people through 64 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Putnam County, New York. EPA system ID: NY3903647; phone on file: 845-540-9546. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 14 ppb from 17 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for London Bridge Water Works is 30 ppb across 5 monitoring periods, 2 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 3 ppb |
| 2024 | 17 ppb over 15 |
| 2024 | 14.8 ppb over 10 |
| 2024 | 30 ppb over 15 |
| 2022 | 9.2 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. London Bridge Water Works's 3 ppb sits at the 72nd percentile in New York and the 81st nationally (higher means more lead).
Other water systems in Putnam County
97 other systems share Putnam County; 46 of them have a higher latest lead result than London Bridge Water Works. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Carmel Wd 2 | 5,000 | 6.9 ppb |
| Cold Spring Village | 2,666 | 1.7 ppb |
| Brewster Village | 2,162 | 7.9 ppb |
| Continental Village Wd | 1,509 | 4 ppb |
| Mount Ebo Ws | 1,500 | 2.1 ppb |
| Carmel Wd 3 | 1,350 | 0 (not detected) |
| Brewster Heights | 1,350 | 1.5 ppb |
| Watchtower Bible Tract Society | 1,251 | 0.4 ppb |
| Carmel Wd 8 | 1,000 | 1 ppb |
| Hunters Glen Condominium Ws | 875 | 1.5 ppb |
What to do in your house
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 London Bridge Water Works 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. Why an old exceedance still matters: over the limit before, under it now.