Hanover Water Dept, NH
Lead reported as not detected
Latest 90th-percentile lead: reported as 0 (not detected) (monitoring period 2021-2023). 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.
Hanover Water Dept at a glance
Hanover Water Dept serves about 9,600 people through 1,645 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 Grafton County, New Hampshire. EPA system ID: NH1071010. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
That is down 2 ppb from 2 ppb in the period ending 2023. The highest 90th-percentile result EPA holds for Hanover Water Dept is 4 ppb across 3 monitoring periods, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 0 (not detected) |
| 2023 | 2 ppb |
| 2020 | 4 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. Hanover Water Dept's reported as 0 (not detected) sits at the 14th percentile in New Hampshire and the 37th nationally (higher means more lead). Systems reporting 0 tie at the bottom, so the rank mostly reflects size among them.
Nearby utilities
68 other systems share Grafton County; 14 of them have a higher latest lead result than Hanover Water Dept. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Lebanon Water Dept | 13,600 | 2 ppb |
| Plymouth Vlg Water And Sewer | 6,700 | 2 ppb |
| Littleton Water And Light | 6,500 | 8 ppb |
| Bristol Water Works | 3,575 | 5 ppb |
| Lincoln Water Works | 3,300 | 7 ppb |
| Waterville Valley Water Dist | 3,150 | - |
| Woodstock Water Dept | 2,950 | - |
| Woodsville Water And Light | 1,950 | - |
| Bethlehem Village Dist | 1,750 | - |
| Ashland Water Dept | 1,525 | - |
Next steps for Hanover, NH
Look up your address in Hanover 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 Hanover 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. The lead result guide covers how utilities pick the homes they sample. Small systems behave differently: why small systems go over more often.