Largest water suppliers
Lead is the LCR 90th-percentile result; a value above 0.015 mg/L exceeds the
EPA action level. “—” means no lead sample is on file for that supplier.
| Supplier | City | Population | Lead (p90) |
|---|---|---|---|
| Manchester Water Works | Manchester | 123,500 | 0.0000 mg/L |
| Pennichuck Water Works | Nashua | 88,853 | 0.0000 mg/L |
| Concord Water Dept | Concord | 44,215 | 0.0010 mg/L |
| Portsmouth Water Works | Portsmouth | 33,000 | 0.0000 mg/L |
| Keene Water Dept | Keene | 30,000 | 0.0000 mg/L |
| Dover Water Dept | Dover | 29,000 | 0.0010 mg/L |
| Merrimack Village Dist | Merrimack | 25,500 | 0.0000 mg/L |
| Rochester Water Dept | Rochester | 25,000 | 0.0020 mg/L |
| Salem Water Dept | Salem | 21,000 | 0.0020 mg/L |
| Derry Water Dept | Derry | 17,370 | 0.0000 mg/L |
| Laconia Water Works | Laconia | 17,125 | 0.0040 mg/L |
| Hudson Water Dept | Hudson | 16,700 | 0.0000 mg/L |
| Unh/Durham Water Sys | Durham | 16,000 | 0.0000 mg/L |
| Seabrook Water Dept | Seabrook | 14,000 | 0.0030 mg/L |
| Lebanon Water Dept | Lebanon | 13,600 | 0.0000 mg/L |
| Exeter Water Dept | Exeter | 12,236 | 0.0000 mg/L |
| Somersworth Water Works | Somersworth | 12,200 | 0.0000 mg/L |
| Pease Trade Port | Portsmouth | 9,900 | 0.0000 mg/L |
| Hanover Water Dept | Hanover | 9,600 | 0.0000 mg/L |
| Berlin Water Works | Berlin | 9,575 | 0.0000 mg/L |
| Milford Water Utilities Dept | Milford | 9,500 | 0.0020 mg/L |
| Claremont Water Dept | Claremont | 9,000 | 0.0020 mg/L |
| Franklin Water Works | Franklin | 7,200 | 0.0030 mg/L |
| Hampstead Area Water | Hampstead | 7,153 | 0.0020 mg/L |
| Litchfield | Litchfield | 6,920 | 0.0000 mg/L |
| Plymouth Vlg Water and Sewer | Plymouth | 6,700 | 0.0020 mg/L |
| Littleton Water and Light | Littleton | 6,500 | 0.0080 mg/L |
| Londonderry | Londonderry | 6,255 | 0.0000 mg/L |
| Wolfeboro Water and Sewer | Wolfeboro | 6,000 | 0.0020 mg/L |
| North Conway Water Pct | Conway | 5,500 | 0.0010 mg/L |
| Pembroke Water Works | Pembroke | 5,200 | 0.0000 mg/L |
| Newmarket Water Works | Newmarket | 5,030 | 0.0020 mg/L |
| Newport Water Works | Newport | 5,000 | 0.0140 mg/L |
| Central Hooksett Water Pct | Hooksett | 4,650 | 0.0010 mg/L |
| Peterborough Water Works | Peterborough | 4,500 | 0.0090 mg/L |
| Rye Water Dist | Rye | 4,300 | 0.0000 mg/L |
| Lower Bartlett Water Pct | Bartlett | 3,850 | 0.0010 mg/L |
| Jaffrey Water Works | Jaffrey | 3,800 | 0.0000 mg/L |
| Penacook Boscawen Water Pct | Boscawen | 3,800 | 0.0000 mg/L |
| Meredith Water Dept | Meredith | 3,750 | 0.0060 mg/L |
| Bristol Water Works | Bristol | 3,575 | 0.0070 mg/L |
| Village Dist of Eastman | Grantham | 3,400 | 0.0070 mg/L |
| Raymond Water Dept | Raymond | 3,300 | 0.0010 mg/L |
| Lincoln Water Works | Lincoln | 3,300 | 0.0070 mg/L |
| Goffstown Village Pct | Goffstown | 3,250 | 0.0860 mg/L |
| New London Springfield Water | New London | 3,250 | 0.0300 mg/L |
| Farmington Water Dept | Farmington | 3,250 | 0.0200 mg/L |
| Waterville Valley Water Dist | Waterville Valley | 3,150 | 0.0690 mg/L |
| Little Pond Estates | Bedford | 3,000 | — |
| Hooksett Village Water Pct | Hooksett | 3,000 | — |
| Cogswell Springs Water Works | Henniker | 3,000 | 0.0190 mg/L |
| Woodstock Water Dept | Woodstock | 2,950 | — |
| Charlestown Water Works | Charlestown | 2,850 | 0.0190 mg/L |
| Winchester Water Dept | Winchester | 2,800 | — |
| Conway Water and Sewer | Conway | 2,745 | — |
| Groveton Water Sys | Northumberland | 2,650 | 0.0300 mg/L |
| Gorham Water and Sewer Dept | Gorham | 2,630 | — |
| Lancaster Water Dept | Lancaster | 2,500 | — |
| Tilton Northfield Water Dist | Northfield | 2,500 | 0.0360 mg/L |
| Locke Lake | Barnstead | 2,308 | — |
| Paradise Shores | Moultonborough | 2,060 | 0.0370 mg/L |
| Hillsborough Water Works | Hillsborough | 2,000 | 0.0330 mg/L |
| Woodsville Water and Light | Haverhill | 1,950 | 0.0360 mg/L |
| North Hinsdale Water Dept | Hinsdale | 1,800 | — |
| Alton Water Works | Alton | 1,800 | 0.2100 mg/L |
| Wilton Water Works | Wilton | 1,790 | 0.0630 mg/L |
| Bethlehem Village Dist | Bethlehem | 1,750 | 0.0210 mg/L |
| N Swanzey Water and Fire Prct | Swanzey | 1,700 | — |
| Rollinsford Water Sewer Dist | Rollinsford | 1,688 | 0.0430 mg/L |
| Sunapee Water Works | Sunapee | 1,680 | 0.0160 mg/L |
| Whitefield Water | Whitefield | 1,640 | — |
| Pittsfield Aqueduct | Pittsfield | 1,625 | 0.0700 mg/L |
| Belmont Water Dept | Belmont | 1,612 | 0.0850 mg/L |
| Epping Water and Sewer Dept | Epping | 1,600 | — |
| Hinsdale Water Dept/Downtown | Hinsdale | 1,600 | — |
| Contoocook Village Pct | Hopkinton | 1,600 | 0.0370 mg/L |
| Ashland Water Dept | Ashland | 1,525 | 0.0310 mg/L |
| Gunstock Acres Village Dist | Gilford | 1,440 | 0.0340 mg/L |
| Sanbornville Water Dept | Wakefield | 1,425 | 0.0390 mg/L |
| Drew Woods | Derry | 1,413 | — |
| Rockingham County Complex | Brentwood | 1,387 | 0.0220 mg/L |
| Enfield Water Dept | Enfield | 1,345 | — |
| Colebrook Water Works | Colebrook | 1,300 | 0.0310 mg/L |
| Emerald Lake | Hillsborough | 1,300 | — |
| Waterville Estate Vlg Dist/W | Campton | 1,250 | 0.0370 mg/L |
| Troy Water Works | Troy | 1,200 | 0.0370 mg/L |
| Village District of Eidelweiss | Madison | 1,200 | — |
| Powder Hill | Bedford | 1,148 | — |
| Grasmere Water Pct/Main | Goffstown | 1,125 | — |
| Greenville Water Dept | Greenville | 1,100 | 0.1100 mg/L |
| Walpole Water Dept | Walpole | 1,057 | — |
| Lisbon Water Dept | Lisbon | 1,010 | 0.0210 mg/L |
| Exeter River Mobile Home Park | Exeter | 980 | — |
| Cabot Preserve | Bedford | 965 | — |
| Antrim Sewer and Water Dept | Antrim | 920 | — |
| Williamsburg | Pelham | 910 | — |
| New Castle Water Works | New Castle | 910 | 0.0170 mg/L |
| Brook Park Ests | Londonderry | 880 | — |
| Carroll Water Works | Carroll | 875 | 0.0290 mg/L |
| Ossipee Water Dept | Ossipee | 860 | 0.0190 mg/L |