Running Brook, NH
Above the federal action level
Latest 90th-percentile lead: 19 ppb (monitoring period 2024-2024). 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.
About Running Brook
Running Brook serves about 47 people through 24 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Rockingham County, New Hampshire. EPA system ID: NH0613030. Ask the utility on your bill for your address in their service line inventory.
Lead results over time
The highest 90th-percentile result EPA holds for Running Brook is 19 ppb across 1 monitoring period, 1 of them over the 15 ppb action level.
| Period ending | 90th-percentile lead |
|---|---|
| 2024 | 19 ppb over 15 |
Where this result ranks
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. Running Brook's 19 ppb sits at the 59th percentile in New Hampshire and the 99th nationally (higher means more lead).
Neighbouring systems
185 other systems share Rockingham County; 7 of them have a higher latest lead result than Running Brook. 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) |
| Seabrook Water Dept | 14,000 | 3 ppb |
| 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) |
Next steps for Derry, NH
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 Running Brook 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. The action level is dropping - the 10 ppb rule from 2027.