Dighton Water District, MA
Lead detected, under the action levels
Latest 90th-percentile lead: 1.6 ppb (monitoring period 2026-2026). 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.
Who runs the water here
Dighton Water District serves about 5,280 people through 1,980 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 Bristol County, Massachusetts. EPA system ID: MA4076000; phone on file: 5088249390. Call that number and ask whether your address has a lead, galvanized or unknown service line.
Dighton Water District's lead record
Against the period ending 2025 (2 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Dighton Water District is 3 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2026 | 1.6 ppb |
| 2025 | 2 ppb |
| 2024 | 0 (not detected) |
| 2024 | 2 ppb |
| 2023 | 3 ppb |
| 2023 | 2 ppb |
| 2022 | 3 ppb |
| 2019 | 2 ppb |
| 2016 | 3 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. Dighton Water District's 1.6 ppb sits at the 48th percentile in Massachusetts and the 65th nationally (higher means more lead).
Other water systems in Bristol County
27 other systems share Bristol County; 14 of them have a higher latest lead result than Dighton Water District. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Inima Usa / Aquaria Llc | 105,643 | - |
| City Of New Bedford Dpi | 101,079 | 4.1 ppb |
| Fall River Water Department | 94,000 | 12 ppb |
| Taunton Water Division | 62,165 | 1.8 ppb |
| Attleboro Water Dept | 46,461 | 1.33 ppb |
| North Attleboro Water Dept | 31,410 | 5.1 ppb |
| Easton Water Div | 25,058 | 1.9 ppb |
| Dartmouth Water Division | 24,696 | 7 ppb |
| Mansfield Water Division | 21,797 | 1.9 ppb |
| Norton Water Department | 19,161 | 1.2 ppb |
What to do in your house
Test your own tap with a certified lab first-draw sample; North Dighton, 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 Dighton Water District whether it covers that cost before hiring anyone - many utilities now do. Its latest copper 90th percentile is 1350 ppb (copper action level 1,300 ppb).
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. Size matters more than most people expect: small vs large water systems.