Williamstown Water Dept, MA
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2017-2019). 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.
Williamstown Water Dept at a glance
Williamstown Water Dept serves about 7,326 people through 2,119 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 groundwater, in Berkshire County, Massachusetts. EPA system ID: MA1341000; phone on file: 4134583383. They can tell you what your service line is made of and whether they pay to replace it.
Lead results over time
Against the period ending 2018 (0 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Williamstown Water Dept is 0 ppb across 2 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2019 | 0 (not detected) |
| 2018 | 0 (not detected) |
How Williamstown Water Dept compares
Of the 535 Massachusetts systems with a lead result, the median latest reading is 1.7 ppb; 13 are over 15 ppb right now and 66 have gone over at some point. Williamstown Water Dept's reported as 0 (not detected) sits at the 19th percentile in Massachusetts 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
37 other systems share Berkshire County; 30 of them have a higher latest lead result than Williamstown Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Pittsfield Dpu Water Dept | 43,927 | 2.4 ppb |
| North Adams Water Dept | 13,000 | 0 (not detected) |
| Lenox Dpw Water Division | 9,800 | 0 (not detected) |
| Adams Fire District | 7,945 | 0 (not detected) |
| Dalton Fire District | 6,330 | 1.15 ppb |
| Lee Water Dept | 5,686 | 1.1 ppb |
| Great Barrington Fire Dist | 4,380 | 5.3 ppb |
| Stockbridge Water Dept | 2,800 | 5 ppb |
| Lanesborough Fire And Water District | 2,342 | 2.2 ppb |
| Cheshire Water Dept | 1,407 | 2.2 ppb |
What to do in your house
Look up your address in Williamstown Water Dept'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 Williamstown Water Dept 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. A zero today does not rule out a jump later - the rules are tightening in 2027.