Braintree Water And Sewer Dept., MA
Lead detected, under the action levels
Latest 90th-percentile lead: 4.8 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.
Braintree Water And Sewer Dept. at a glance
Braintree Water And Sewer Dept. serves about 39,143 people through 12,167 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 Norfolk County, Massachusetts. EPA system ID: MA4040000; phone on file: 7818439205. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Lead results over time
That is down 2.3 ppb from 7.1 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Braintree Water And Sewer Dept. is 15 ppb across 8 monitoring periods, none of them over 15 ppb (4 over 10 ppb).
| Period ending | 90th-percentile lead |
|---|---|
| 2025 | 4.8 ppb |
| 2023 | 7.1 ppb |
| 2022 | 11 ppb over 10 |
| 2021 | 6.8 ppb |
| 2021 | 11 ppb over 10 |
| 2021 | 15 ppb over 10 |
| 2020 | 13 ppb over 10 |
| 2017 | 8 ppb |
Where this result ranks
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. Braintree Water And Sewer Dept.'s 4.8 ppb sits at the 83rd percentile in Massachusetts and the 90th nationally (higher means more lead).
Neighbouring systems
38 other systems share Norfolk County; 7 of them have a higher latest lead result than Braintree Water And Sewer Dept.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Tri Town Water Board | 856,000 | - |
| Quincy Water Dept. (Mwra) | 106,000 | 14.4 ppb |
| Brookline Water And Sewer Division | 63,191 | 2 ppb |
| Weymouth Water Department | 57,871 | 1.2 ppb |
| Randolph/Holbrook Joint Water Board | 46,519 | - |
| Dedham Westwood Water Dist. | 41,630 | 2 ppb |
| Randolph Water Department | 35,114 | 3 ppb |
| Franklin Water Department | 33,706 | 5 ppb |
| Needham Water Dept | 31,664 | 2 ppb |
| Norwood Water Dept. (Mwra) | 29,909 | 7 ppb |
Your move
Test your own tap with a certified lab first-draw sample; Braintree, MA 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 Braintree Water And Sewer 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. The lead result guide covers how utilities pick the homes they sample. Size matters more than most people expect: small vs large water systems.