Putnam Water Pollution Control Authority, CT
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (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 90th-percentile result was reported as 0 (not detected at the lab's limit). That says the sampled homes were low, not that your home has no lead service line. Check your utility's service line inventory for your address.
Putnam Water Pollution Control Authority at a glance
Putnam Water Pollution Control Authority serves about 7,300 people through 2,451 service connections, which makes it a medium-sized system under EPA's size classes. It is owned by a local government (city, town, county or district) and draws surface water, in Windham County, Connecticut. EPA system ID: CT1160011; phone on file: 860-963-6800. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 2.8 ppb from 2.8 ppb in the period ending 2025. The highest 90th-percentile result EPA holds for Putnam Water Pollution Control Authority is 2.8 ppb across 20 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 0 (not detected) |
| 2025 | 2.8 ppb |
| 2024 | 0 (not detected) |
| 2024 | 0 (not detected) |
| 2023 | 0 (not detected) |
| 2023 | 0.9 ppb |
| 2022 | 0.6 ppb |
| 2022 | 1.7 ppb |
| 2021 | 1.4 ppb |
| 2021 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2020 | 0 (not detected) |
| 2019 | 2.4 ppb |
| 2019 | 0 (not detected) |
| 2018 | 1.4 ppb |
| 2018 | 0 (not detected) |
| 2017 | 1.5 ppb |
| 2017 | 0 (not detected) |
| 2016 | 2 ppb |
| 2016 | 0 (not detected) |
Where this result ranks
Of the 493 Connecticut systems with a lead result, the median latest reading is 0.8 ppb; 2 are over 15 ppb right now and 49 have gone over at some point. Putnam Water Pollution Control Authority's reported as 0 (not detected) sits at the 35th percentile in Connecticut and the 36th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Neighbouring systems
45 other systems share Windham County; 25 of them have a higher latest lead result than Putnam Water Pollution Control Authority. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Windham Water Works | 21,214 | 0 (not detected) |
| Ctwc - Crystal System | 6,378 | 2.1 ppb |
| Ctwc - Gallup System | 2,538 | 2.3 ppb |
| Ctwc - Plainfield System | 1,713 | 0 (not detected) |
| Ctwc - Thompson System | 1,070 | 1.1 ppb |
| Woodstock Academy South Campus | 620 | 7.9 ppb |
| Pomfret School | 400 | 0 (not detected) |
| Ctwc - Ashford Park Division | 334 | 0 (not detected) |
| Wyndham Park Apartments | 312 | 1.4 ppb |
| Sterling Water System | 308 | 0.8 ppb |
Next steps for Putnam, CT
Look up your address in Putnam Water Pollution Control Authority's service line inventory. If it says lead, galvanized or unknown, test your tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Putnam Water Pollution Control Authority 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. What a 90th-percentile result does and does not tell you: how to read a lead result. Small systems behave differently: why small systems go over more often.