New Hampshire Tap Water Quality: Is It Safe to Drink?

2026 EPA water quality data for 706 community water systems serving a combined 907,476 people in New Hampshire. Find your water system to see violations, PFAS results, lead testing, and a safety grade — free.

New Hampshire relies on a mix of surface water and bedrock wells for drinking water. PFAS contamination from the former Pease Air Force Base and a Saint-Gobain plastics facility prompted the state to adopt some of the strictest PFAS standards in the country. Naturally occurring arsenic and uranium are common in granite bedrock wells.

Find Your Water System in New Hampshire

Enter your ZIP code to see EPA violations, lead test results, PFAS data, and a safety grade for your water.

📊 Data from EPA’s SDWIS · 🔄 Updated quarterly · 🏛️ 706 water systems in New Hampshire

Showing the 250 largest of 706 community water systems in New Hampshire, by population served. Use the ZIP search above or the city links to find a smaller system.

MANCHESTER WATER WORKS MANCHESTER, NH · 123,500 people · Surface Water PENNICHUCK WATER WORKS NASHUA, NH · 89,073 people · Surface Water CONCORD WATER DEPT CONCORD, NH · 44,215 people · Surface Water PORTSMOUTH WATER WORKS PORTSMOUTH, NH · 33,000 people · Surface Water KEENE WATER DEPT KEENE, NH · 30,000 people · Surface Water DOVER WATER DEPT DOVER, NH · 29,000 people · Groundwater MERRIMACK VILLAGE DIST MERRIMACK, NH · 25,500 people · Groundwater ROCHESTER WATER DEPT ROCHESTER, NH · 25,000 people · Surface Water SALEM WATER DEPT SALEM, NH · 21,000 people · Surface Water AQUARION WATER/NH MONROE, CT · 18,950 people · Groundwater DERRY WATER DEPT DERRY, NH · 17,290 people · Surface Water Purchased LACONIA WATER WORKS LACONIA, NH · 17,000 people · Surface Water HUDSON WATER DEPT HUDSON, NH · 16,700 people · Groundwater UNH/DURHAM WATER SYS DURHAM, NH · 16,000 people · Surface Water SEABROOK WATER DEPT SEABROOK, NH · 14,000 people · Groundwater LEBANON WATER DEPT LEBANON, NH · 13,600 people · Surface Water EXETER WATER DEPT EXETER, NH · 12,236 people · Surface Water SOMERSWORTH WATER WORKS SOMERSWORTH, NH · 12,000 people · Surface Water PEASE TRADE PORT PORTSMOUTH, NH · 9,900 people · Groundwater HANOVER WATER DEPT HANOVER, NH · 9,600 people · Surface Water BERLIN WATER WORKS BERLIN, NH · 9,575 people · Surface Water MILFORD WATER UTILITIES DEPT MILFORD, NH · 9,500 people · Surface Water Purchased CLAREMONT WATER DEPT CLAREMONT, NH · 9,000 people · Surface Water FRANKLIN WATER WORKS FRANKLIN, NH · 7,200 people · Groundwater HAMPSTEAD AREA WATER ATKINSON, NH · 7,153 people · Surface Water Purchased LITCHFIELD NASHUA, NH · 7,000 people · Surface Water Purchased PLYMOUTH VLG WATER AND SEWER PLYMOUTH, NH · 6,700 people · Groundwater LITTLETON WATER AND LIGHT LITTLETON, NH · 6,500 people · Surface Water LONDONDERRY NASHUA, NH · 6,255 people · Surface Water Purchased WOLFEBORO WATER AND SEWER WOLFEBORO, NH · 6,000 people · Surface Water NORTH CONWAY WATER PCT NORTH CONWAY, NH · 5,500 people · Groundwater PEMBROKE WATER WORKS PEMBROKE, NH · 5,200 people · Groundwater NEWMARKET WATER WORKS NEWMARKET, NH · 5,030 people · Groundwater NEWPORT WATER WORKS NEWPORT, NH · 5,000 people · Surface Water CENTRAL HOOKSETT WATER PCT HOOKSETT, NH · 4,650 people · Surface Water Purchased PETERBOROUGH WATER WORKS PETERBOROUGH, NH · 4,500 people · Groundwater RYE WATER DIST RYE, NH · 4,300 people · Groundwater LOWER BARTLETT WATER PCT INTERVALE, NH · 3,850 people · Groundwater PENACOOK BOSCAWEN WATER PCT NASHUA, NH · 3,800 people · Groundwater JAFFREY WATER WORKS JAFFREY, NH · 3,800 people · Groundwater MEREDITH WATER DEPT MEREDITH, NH · 3,750 people · Surface Water BRISTOL WATER WORKS BRISTOL, NH · 3,575 people · Groundwater VILLAGE DIST OF EASTMAN GRANTHAM, NH · 3,400 people · Groundwater LINCOLN WATER WORKS LINCOLN, NH · 3,300 people · Surface Water RAYMOND WATER DEPT RAYMOND, NH · 3,300 people · Groundwater FARMINGTON WATER DEPT FARMINGTON, NH · 3,250 people · Groundwater GOFFSTOWN VILLAGE PCT GOFFSTOWN, NH · 3,250 people · Surface Water NEW LONDON SPRINGFIELD WATER NEW LONDON, NH · 3,250 people · Groundwater WATERVILLE VALLEY WATER DIST WATERVILLE VALLEY, NH · 3,150 people · Groundwater LITTLE POND ESTATES NASHUA, NH · 3,000 people · Surface Water Purchased COGSWELL SPRINGS WATER WORKS HENNIKER, NH · 3,000 people · Groundwater HOOKSETT VILLAGE WATER PCT HOOKSETT, NH · 3,000 people · Groundwater WOODSTOCK WATER DEPT NORTH WOODSTOCK, NH · 2,950 people · Groundwater CHARLESTOWN WATER WORKS CHARLESTOWN, NH · 2,850 people · Groundwater WINCHESTER WATER DEPT WINCHESTER, NH · 2,800 people · Groundwater CONWAY WATER AND SEWER CONWAY, NH · 2,745 people · Groundwater GROVETON WATER SYS GROVETON, NH · 2,650 people · Groundwater GORHAM WATER AND SEWER DEPT GORHAM, NH · 2,630 people · Surface Water LANCASTER WATER DEPT LANCASTER, NH · 2,500 people · Surface Water TILTON NORTHFIELD WATER DIST TILTON, NH · 2,500 people · Groundwater LOCKE LAKE NASHUA, NH · 2,280 people · Surface Water WOODSVILLE WATER AND LIGHT WOODSVILLE, NH · 2,075 people · Surface Water PARADISE SHORES MOULTONBOROUGH, NH · 2,060 people · Groundwater HILLSBOROUGH WATER WORKS HILLSBOROUGH, NH · 2,000 people · Surface Water ALTON WATER WORKS ALTON, NH · 1,800 people · Groundwater NORTH HINSDALE WATER DEPT HINSDALE, NH · 1,800 people · Groundwater WILTON WATER WORKS WILTON, NH · 1,790 people · Groundwater BETHLEHEM VILLAGE DIST BETHLEHEM, NH · 1,750 people · Surface Water N SWANZEY WATER AND FIRE PRCT N SWANZEY, NH · 1,700 people · Surface Water Purchased ROLLINSFORD WATER SEWER DIST ROLLINSFORD, NH · 1,688 people · Groundwater SUNAPEE WATER WORKS SUNAPEE, NH · 1,680 people · Surface Water WHITEFIELD WATER WHITEFIELD, NH · 1,640 people · Groundwater PITTSFIELD AQUEDUCT NASHUA, NH · 1,630 people · Surface Water BELMONT WATER DEPT NASHUA, NH · 1,612 people · Groundwater EPPING WATER AND SEWER DEPT EPPING, NH · 1,600 people · Groundwater HINSDALE WATER DEPT/DOWNTOWN HINSDALE, NH · 1,600 people · Groundwater CONTOOCOOK VILLAGE PCT CONCORD, NH · 1,600 people · Surface Water ASHLAND WATER DEPT ASHLAND, NH · 1,525 people · Groundwater GUNSTOCK ACRES VILLAGE DIST GILFORD, NH · 1,440 people · Groundwater SANBORNVILLE WATER DEPT SANBORNVILLE, NH · 1,425 people · Groundwater DREW WOODS NASHUA, NH · 1,408 people · Surface Water Purchased ROCKINGHAM COUNTY COMPLEX BRENTWOOD, NH · 1,387 people · Groundwater ENFIELD WATER DEPT ENFIELD, NH · 1,345 people · Groundwater COLEBROOK WATER WORKS COLEBROOK, NH · 1,300 people · Groundwater EMERALD LAKE HILLSBORO, NH · 1,300 people · Groundwater WATERVILLE ESTATE VLG DIST/W CAMPTON, NH · 1,250 people · Groundwater VILLAGE DISTRICT OF EIDELWEISS MADISON, NH · 1,200 people · Groundwater TROY WATER WORKS TROY, NH · 1,200 people · Groundwater POWDER HILL NASHUA, NH · 1,155 people · Surface Water Purchased GRASMERE WATER PCT/MAIN GOFFSTOWN, NH · 1,125 people · Surface Water Purchased GREENVILLE WATER DEPT GREENVILLE, NH · 1,100 people · Surface Water WALPOLE WATER DEPT WALPOLE, NH · 1,057 people · Groundwater ROSEBROOK WATER MONROE, CT · 1,050 people · Groundwater LISBON WATER DEPT LISBON, NH · 1,010 people · Groundwater EXETER RIVER MOBILE HOME PARK EXETER, NH · 980 people · Groundwater WILLIAMSBURG NASHUA, NH · 928 people · Groundwater ANTRIM SEWER AND WATER DEPT ANTRIM, NH · 920 people · Groundwater NEW CASTLE WATER WORKS PORTSMOUTH, NH · 910 people · Surface Water Purchased CABOT PRESERVE NASHUA, NH · 878 people · Groundwater Purchased CARROLL WATER WORKS TWIN MOUNTAIN, NH · 875 people · Groundwater BROOK PARK ESTS NASHUA, NH · 875 people · Surface Water Purchased OSSIPEE WATER DEPT CENTER OSSIPEE, NH · 860 people · Groundwater BEAR VIEW CROSSING ALLENSTOWN, NH · 800 people · Groundwater Purchased EPSOM VILLAGE WATER DISTRICT HENNIKER, NH · 800 people · Groundwater MILTON WATER DIST MILTON, NH · 800 people · Groundwater MOUNTAIN LAKES WATER DISTRICT WOODSVILLE, NH · 787 people · Groundwater BENNINGTON WATER DEPT BENNINGTON, NH · 775 people · Groundwater RIVER RUN CONDOS NORTH CONWAY, NH · 750 people · Groundwater NO HAVERHILL WATER AND LIGHT WOODSVILLE, NH · 750 people · Groundwater MARLBOROUGH WATER WORKS MARLBOROUGH, NH · 750 people · Groundwater MERIDEN VILLAGE WATER DIST MERIDEN, NH · 750 people · Groundwater VLG OF NORTHWOOD RDG WTR DIST NORTHWOOD, NH · 688 people · Groundwater CANAAN WATER DEPT CANAAN, NH · 684 people · Surface Water WARNER VILLAGE WATER DIST WARNER, NH · 660 people · Groundwater ANDOVER VILLAGE DIST ANDOVER, NH · 650 people · Surface Water BARTLETT VILLAGE PCT BARTLETT, NH · 625 people · Surface Water SULLIVAN COUNTY COMPLEX UNITY, NH · 625 people · Groundwater N WALPOLE VILLAGE DISTRICT/LOW BELLOWS FALLS, VT · 625 people · Groundwater GREEN HILLS ESTS NASHUA, NH · 620 people · Groundwater Purchased CAMPTON VILLAGE PCT CAMPTON, NH · 600 people · Groundwater HILL WATER WORKS HILL, NH · 600 people · Groundwater NEW HAMPTON VILLAGE PCT GLEN, NH · 600 people · Surface Water LOV WATER MOULTONBOROUGH, NH · 590 people · Groundwater BIRCH HILL EAST NASHUA, NH · 550 people · Groundwater Purchased NEWFIELDS VLG WATER AND SEWER ROCHESTER, NH · 550 people · Groundwater PRECINCT OF HAVERHILL CORNER HAVERHILL, NH · 540 people · Groundwater FRANCONIA VILLAGE WATER FRANCONIA, NH · 535 people · Groundwater W AND E NASHUA, NH · 525 people · Groundwater MAPLE HILL ACRES NASHUA, NH · 523 people · Surface Water Purchased JACKSON WATER PCT JACKSON, NH · 500 people · Surface Water GEORGES MILLS WATER WORKS SUNAPEE, NH · 500 people · Groundwater COLBY POND ATKINSON, NH · 485 people · Groundwater ROCKHOUSE MOUNTAIN CONWAY, NH · 480 people · Groundwater MITTERSILL WATER DEPT FRANCONIA, NH · 475 people · Groundwater GREENVILLE EST VILLAGE DIST GREENVILLE, NH · 472 people · Surface Water Purchased PLAISTOW WATER DEPT ATKINSON, NH · 465 people · Surface Water Purchased WHISPERING WINDS NASHUA, NH · 460 people · Surface Water Purchased HANCOCK WATER WORKS HANCOCK, NH · 450 people · Surface Water BADGER HILL NASHUA, NH · 438 people · Groundwater WEST SWANZEY WATER WEST SWANZEY, NH · 430 people · Groundwater W STEWARTSTOWN WATER PCT WEST STEWARTSTOWN, NH · 428 people · Groundwater Purchased PINELAND PARK EXETER, NH · 425 people · Groundwater PINE GARDENS MHP BELMONT, NH · 413 people · Groundwater RIVER RUN EXETER, NH · 411 people · Groundwater LOCHMERE VILLAGE DIST TILTON, NH · 405 people · Groundwater RESIDENTIAL CAMP MONADNOCK JAFFREY, NH · 400 people · Groundwater ABENAKI WATER /LAKELAND MONROE, CT · 395 people · Groundwater COTTON FARMS MHP MINNEAPOLIS, MN · 390 people · Groundwater TWIN RIDGE CONDOS NASHUA, NH · 390 people · Surface Water Purchased MOUNTAIN VALE VILLAGE MHP SAN FRANCISCO, CA · 388 people · Groundwater HALES LOCATION HALES LOCATION, NH · 385 people · Groundwater CATAMOUNT HILL CONCORD, NH · 383 people · Groundwater AVERY ESTATES NASHUA, NH · 380 people · Surface Water Purchased CHESHIRE COUNTY COMPLEX WESTMORELAND, NH · 380 people · Surface Water FREEDOM HILL/PINE RIDGE EST LOUDON, NH · 370 people · Groundwater KINGS TOWNE MHP EPSOM, NH · 350 people · Groundwater ACKERMAN RETIREMENT PARK DERRY, NH · 350 people · Groundwater SAMOSET AT WINNIPESAUKEE MANCHESTER, NH · 343 people · Groundwater LAKEVIEW CONDOS WINDSOR, VT · 328 people · Groundwater MALLARDS LANDING BELMONT, NH · 325 people · Groundwater GOLDEN BROOK NASHUA, NH · 323 people · Groundwater NORDIC VILLAGE CHEPACHET, RI · 315 people · Groundwater TRANQUILITY ESTATES CONCORD, NH · 315 people · Groundwater LEDGES AT NEWFOUND LAKE GILFORD, NH · 307 people · Groundwater OAKWOOD TERRACE NASHUA, NH · 307 people · Surface Water Purchased PINE GROVE MOBILE HOME PARK SWANZEY, NH · 305 people · Groundwater LANCASTER FARMS ATKINSON, NH · 303 people · Groundwater CARDIGAN MOUNTAIN SCH CANAAN, NH · 300 people · Groundwater CROTCHED MOUNTAIN SCHOOL GREENFIELD, NH · 300 people · Groundwater MONROE WATER DEPT MONROE, NH · 300 people · Groundwater NORTH STRATFORD WATER DEPT COLUMBIA, NH · 300 people · Groundwater MINISTERIAL/PARRISH HILLS NASHUA, NH · 298 people · Groundwater HIDDEN VALLEY/MASON MOULTONBOROUGH, NH · 298 people · Groundwater LINDERHOF PROP OWNR ASSN GLEN, NH · 295 people · Groundwater SOUHEGAN WOODS NASHUA, NH · 293 people · Groundwater ROPEWALK SERVICES ASHLAND, NH · 290 people · Groundwater PLAINFIELD WATER DEPT MERIDEN, NH · 284 people · Groundwater LYME WATER ENFIELD, NH · 283 people · Groundwater WEDIKO SCHOOL WINDSOR, NH · 280 people · Groundwater LAKES REGION MHP COOP II BELMONT, NH · 276 people · Groundwater OWLS NEST GOLF CLUB AND CONDOS CAMPTON, NH · 272 people · Groundwater EAGLE RIDGE RESORT GLEN, NH · 270 people · Groundwater MERRYMEETING MHP ALTON, NH · 265 people · Groundwater BLUFFS AT OSSIPEE LAKE CENTER OSSIPEE, NH · 265 people · Groundwater TAMWORTH WATER WORKS MOULTONBOROUGH, NH · 265 people · Groundwater LOWER SHAKER VILLAGE MERIDEN, NH · 263 people · Groundwater INDIAN MOUND GOLF CLUB MOULTONBOROUGH, NH · 260 people · Groundwater VILLAGE AT RIVERBEND PLYMOUTH, NH · 258 people · Groundwater CARROLL COUNTY COMPLEX OSSIPEE, NH · 258 people · Groundwater OSSIPEE MOUNTAINS ESTATES CENTER OSSIPEE, NH · 255 people · Groundwater GLEN RIDGE DEV NASHUA, NH · 253 people · Groundwater EMERALD ACRES BARRINGTON, NH · 250 people · Groundwater SUNRAY SHORES WATER DIST BELMONT, NH · 250 people · Groundwater MAPLE HAVEN NASHUA, NH · 250 people · Groundwater OAKRIDGE CONDOS HAVERHILL, NH · 250 people · Groundwater VILLAGES AT LOUDON LOUDON, NH · 250 people · Groundwater WHITE LAKE ESTATES PAWTUCKET, RI · 250 people · Groundwater MAPLEVALE AND CRICKET HILL ATKINSON, NH · 248 people · Groundwater VIEWPOINT COOP SWANZEY, NH · 248 people · Groundwater VILLAGES AT CHESTER CONDOS MANCHESTER, NH · 245 people · Groundwater CONTOOCOOK RIVER COOPERATIVE DEERING, NH · 245 people · Groundwater OLDE TOWNE ALLENSTOWN, NH · 243 people · Groundwater SACO WOODS CONDOS GLEN, NH · 240 people · Groundwater EPSOM HEALTHCARE CTR EPSOM, NH · 240 people · Groundwater ABENAKI WATER/WHITE ROCK WATER MONROE, CT · 238 people · Groundwater TWO RIVERS MHCC CAMPTON, NH · 234 people · Groundwater LRMHV GILFORD, NH · 233 people · Groundwater PITTSBURG WATER DEPT PITTSBURG, NH · 233 people · Groundwater GLENCLIFF HOME FOR THE ELDERLY GLENCLIFF, NH · 230 people · Groundwater SARGENT WOODS ATKINSON, NH · 230 people · Groundwater TENNEY BROOK II PLYMOUTH, NH · 228 people · Groundwater SWAINS LAKE VILLAGE WATER BARRINGTON, NH · 227 people · Groundwater BLACKROCKS VILLAGE ATKINSON, NH · 226 people · Groundwater BROOKDALE SPRUCE WOOD DURHAM, NH · 225 people · Groundwater SPRINGWOOD HILLS NASHUA, NH · 225 people · Surface Water Purchased PATRICIAN SHORES CENTER HARBOR, NH · 225 people · Groundwater SUNRISE ESTATES NASHUA, NH · 225 people · Groundwater HALE ESTATES CONWAY, NH · 220 people · Groundwater HOLLIS PINES COOP MHP WEST CONCORD, NH · 220 people · Groundwater HUDSON MOBILE HOME ESTS NASHUA, NH · 220 people · Groundwater RODGERS DEV GILFORD, NH · 220 people · Groundwater GREAT BAY WATER SYSTEM NASHUA, NH · 218 people · Groundwater PLEASANT POND COOP AND CMPGRND WINDHAM, NH · 218 people · Groundwater HOPKINTON VILLAGE PCT HOPKINTON, NH · 215 people · Groundwater ACORN TERRACE ROCHESTER, NH · 215 people · Groundwater FAR ECHO HARBOR MOULTONBOROUGH, NH · 213 people · Groundwater WHITE MOUNTAIN RESORT/GATEWAY MOULTONBOROUGH, NH · 213 people · Groundwater MONTROSE CONDOS EPPING, NH · 210 people · Groundwater CHALK POND WATER NEWBURY, NH · 208 people · Groundwater HEMLOCK HAVEN PORTSMOUTH, NH · 207 people · Groundwater LOST VALLEY OSSIPEE, NH · 206 people · Groundwater GROUSE POINT CLUB MEREDITH, NH · 205 people · Groundwater PENDLETON COVE MOULTONBOROUGH, NH · 204 people · Groundwater CORNERSTONE ESTATES ATKINSON, NH · 202 people · Groundwater ROCK RIMMON COOPERATIVE EAST HAMPSTEAD, NH · 200 people · Groundwater SUN VALLEY MONROE, CT · 200 people · Groundwater Purchased WESCO UTILITIES NASHUA, NH · 200 people · Groundwater Purchased THE MEADOWS MANCHESTER, NH · 200 people · Groundwater PINE KNOLL VILLAGE MARBLEHEAD, MA · 200 people · Groundwater MONADNOCK TENANTS RINDGE, NH · 200 people · Groundwater MOUNTAIN RIVER CONDOS EAST CAMPTON, NH · 200 people · Groundwater SOUTH MAIN STREET WATER DIST WARREN, NH · 200 people · Groundwater SOUTH WEARE WATER WEARE, NH · 200 people · Groundwater BARRINGTON MOBILE HOME ESTATES LAS VEGAS, NH · 198 people · Groundwater WOODLANDS NASHUA, NH · 198 people · Groundwater SALT RIVER CONDOS EXETER, NH · 195 people · Groundwater TOWN LINE VILLAGE HOLDERNESS, NH · 193 people · Groundwater ABENAKI WATER/GILFORD VILLAGE MONROE, CT · 190 people · Groundwater VALLEY FIELD APTS NORTHLAND NASHUA, NH · 188 people · Groundwater STONEFORD ATKINSON, NH · 188 people · Groundwater

New Hampshire Drinking Water: Frequently Asked Questions

Is New Hampshire tap water safe to drink?

New Hampshire has 706 community water systems regulated by the EPA serving a combined 907,476 people. Water quality varies by system — search above to find your specific utility and see its violation history, lead test results, and safety grade.

How many water systems are in New Hampshire?

There are 706 EPA-regulated community water systems in New Hampshire serving a combined 907,476 people. Each system is required to test for over 90 contaminants and publicly report any violations.

Does New Hampshire have PFAS in its drinking water?

PFAS (forever chemicals) have been detected in water systems across the country, including New Hampshire. The EPA finalized enforceable PFAS limits in 2024. Search for your specific water system above to see if PFAS were detected and whether levels exceed the new federal limits.

EPA data last updated: 2026-07-12