Highland Colony, NH
Above the federal action level
Latest 90th-percentile lead: 32 ppb (monitoring period 2019-2021). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. In the most recent monitoring period, more than 10% of the sampled homes measured above 15 ppb. Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking now, and test your own tap.
Highland Colony at a glance
Highland Colony serves about 88 people through 35 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Grafton County, New Hampshire. EPA system ID: NH1162010. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
The highest 90th-percentile result EPA holds for Highland Colony is 32 ppb across 1 monitoring period, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2021 | 32 ppb over 15 |
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. Highland Colony's 32 ppb sits at the 78th percentile in New Hampshire and the 100th nationally (higher means more lead).
Neighbouring systems
68 other systems share Grafton County; 3 of them have a higher latest lead result than Highland Colony. 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 |
| Hanover Water Dept | 9,600 | 0 (not detected) |
| 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 | - |
Your move
Use a filter certified to NSF/ANSI 53 for lead on the tap you drink and cook from, now, before you test. Then test your own tap. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Highland Colony 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. 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.