Woonsocket Water Division, RI
Lead detected, under the action levels
Latest 90th-percentile lead: 6.6 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.
Woonsocket Water Division at a glance
Woonsocket Water Division serves about 45,828 people through 9,805 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 Providence County, Rhode Island. EPA system ID: RI1559518; phone on file: 401-767-1413. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
That is down 1.3 ppb from 7.9 ppb in the period ending 2024. The highest 90th-percentile result EPA holds for Woonsocket Water Division is 9.3 ppb across 14 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 6.6 ppb |
| 2024 | 7.9 ppb |
| 2023 | 9.3 ppb |
| 2023 | 9.3 ppb |
| 2023 | 9.3 ppb |
| 2022 | 5.8 ppb |
| 2022 | 5.8 ppb |
| 2022 | 4.4 ppb |
| 2021 | 5.6 ppb |
| 2020 | 5.8 ppb |
| 2020 | 5.8 ppb |
| 2019 | 2 ppb |
| 2019 | 2 ppb |
| 2017 | 2 ppb |
Where this result ranks
Of the 78 Rhode Island systems with a lead result, the median latest reading is 1.1 ppb; 6 are over 15 ppb right now and 17 have gone over at some point. Woonsocket Water Division's 6.6 ppb sits at the 90th percentile in Rhode Island and the 94th nationally (higher means more lead).
Neighbouring systems
24 other systems share Providence County; 3 of them have a higher latest lead result than Woonsocket Water Division. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Providence-City Of | 333,142 | 1.7 ppb |
| Pawtucket Water Supply Board Veolia-Na | 98,130 | 0 (not detected) |
| East Providence-City Of | 47,961 | 0.3 ppb |
| Lincoln Water Commission | 21,664 | 0 (not detected) |
| Cumberland, Town Of | 21,235 | 0 (not detected) |
| Greenville Water District | 9,500 | 0 (not detected) |
| Smithfield Water Supply Board | 9,460 | 0 (not detected) |
| Clear River Electric And Water District | 6,000 | 1.3 ppb |
| Slatersville Public Supply | 3,403 | 0 (not detected) |
| Dowling Village | 2,720 | 0 (not detected) |
Your move
Test your own tap with a certified lab first-draw sample; Woonsocket, RI 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 Woonsocket Water Division 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. The action level is dropping - the 10 ppb rule from 2027.