Seabrook Water Dept, NH
Lead detected, under the action levels
Latest 90th-percentile lead: 3 ppb (monitoring period 2022-2024). 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.
About Seabrook Water Dept
Seabrook Water Dept serves about 14,000 people through 3,832 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 groundwater, in Rockingham County, New Hampshire. EPA system ID: NH2111010. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
Against the period ending 2023 (3 ppb) the latest result is about the same. The highest 90th-percentile result EPA holds for Seabrook Water Dept is 5 ppb across 9 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 3 ppb |
| 2023 | 3 ppb |
| 2023 | 3 ppb |
| 2022 | 3 ppb |
| 2020 | 3 ppb |
| 2019 | 4 ppb |
| 2019 | 5 ppb |
| 2017 | 3 ppb |
| 2016 | 2 ppb |
Against other New Hampshire systems
Of the 124 New Hampshire systems with a lead result, the median latest reading is 16 ppb; 62 are over 15 ppb right now and 64 have gone over at some point. Seabrook Water Dept's 3 ppb sits at the 41st percentile in New Hampshire and the 83rd nationally (higher means more lead).
Nearby utilities
185 other systems share Rockingham County; 12 of them have a higher latest lead result than Seabrook Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Portsmouth Water Works | 33,000 | 0 (not detected) |
| Salem Water Dept | 21,080 | 2 ppb |
| Derry Water Dept | 17,528 | 0 (not detected) |
| Exeter Water Dept | 12,236 | 0 (not detected) |
| Pease Trade Port | 9,900 | 0 (not detected) |
| Hampstead Area Water | 7,153 | 2 ppb |
| Londonderry | 6,255 | 4 ppb |
| Newmarket Water Works | 5,030 | 2 ppb |
| Rye Water Dist | 4,300 | 0 (not detected) |
| Raymond Water Dept | 3,300 | 1 ppb |
Next steps for Seabrook, NH
Test your own tap with a certified lab first-draw sample; Seabrook, NH 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 Seabrook 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. Size matters more than most people expect: small vs large water systems.