New Hampshire

Hillsborough County drinking water quality

280 active public water systems serve 336,745 people in Hillsborough County. 184 are compliant, 96 had at least one EPA violation in the past three years, 0 are designated serious violators, and 4 carry a health flag.

Active systems 280 74 community systems

People served 337K by public water systems

Systems with violations 96 34% of active systems, past 3 years

Serious violators 0 4 systems carry a health flag

Needs attention

Emerald Lake NH1141020 · Hillsborough · Community water system · Serves 1,300 3 rules violated in the past three years. Unresolved: Ground Water Rule and Public Notice Rule and Revised PN Rule.

Wediko School NH2552010 · Windsor · Community water system · Serves 280 3 rules violated in the past three years. Unresolved: Lead and Copper Rule.

Hollis Village Marketplace NH1176010 · Hollis · Community water system · Serves 36 3 rules violated in the past three years. Unresolved: Ground Water Rule.

Pelham BP NH1858130 · Pelham · Transient non-community system · Serves 25 1 rule violated in the past three years. Unresolved: Revised Total Coliform Rule.

Community water systems

74 systems, largest first

System	Serves	Rules violated, 3 yr	Unresolved
Sugar Hill Manor MHP Weare	76	0	0
Ashley Commons Milford	75	0	0
Kuncanowet Hills Mobile Home Weare	75	0	0
Runnells Landing Hollis	74	0	0
Frost Trailer Park Greenville	73	0	0
Gage Hill Pelham	73	0	0
Fairhaven Mobile Home Park Milford	63	3	1
South Face Condos Bennington	60	0	0
English Woods Bedford	58	0	0
Francoeur Apt/hudson Motor Inn Hudson	58	0	0
Appleton Gardens New Ipswich	57	0	0
Gowing Woods Amherst	53	0	0
Birches of Bennington Bennington	52	1	0
Connor Court Amherst	51	0	0
Greenfield Commons Greenfield	48	2	0
Heritage Way Milford	48	0	0
Hedgehog Community Coop Deering	45	0	0
Paradise Estates Condominium Pelham	45	0	0
Wilder Village Cluster New Ipswich	45	0	0
Boulder Hills Pelham	39	0	0
Hollis Village Marketplace Hollis	36	3	1
Simpson Mill Road Pelham	35	0	0
Old Lawrence Road Pelham	25	0	0
Rockwood Terrace Condos Manchester	25	4	1

Non-community systems (206: schools, campgrounds, workplaces, restaurants)

These systems serve places people visit rather than homes.

System	Serves	Rules violated, 3 yr	Unresolved
Hollis Sch Dist Hollis	2,000	0	0
Crotched Mountain Ski Area Bennington	1,500	2	0
Hillsborough Cnty Yth Cntr New Boston	1,150	1	1
Hollis Brookline HS Hollis	980	0	0
470 Mobil Bedford	950	0	0
McDonalds Restaurant Pelham	900	0	0
Dunkin Donuts/baskin Robbins Pelham	775	1	0
John Stark Reg High Sch Weare	698	0	0
Cold Springs Campground/ph Weare	657	0	0
Center Woods Elementary Sch Weare	620	0	0
Riley Field Complex Bedford	600	0	0
New Boston Elementary Sch New Boston	598	0	0
Greenfield ST PK Pump House Greenfield	550	0	0
Weare Middle Sch Weare	500	1	1
Camp Tevya Brookline	497	0	0
Bedford White Ave Irving Bedford	475	1	0
Highbridge Hill Elem Sch New Ipswich	465	0	0
Camp Foster Bedford	460	1	0
Dunkin Donuts Hollis	450	0	0
Camp Young Judaea/the Grove Amherst	415	0	0
Boynton Middle Sch New Ipswich	410	1	0
Richard Maghakian Memorial Sch Brookline	395	0	0
7 Eleven Litchfield	350	0	0
Mascenic Regional High Sch New Ipswich	350	0	0
Murphys Taproom/carriage Hse Bedford	350	1	0
Pelham Veterans Memorial Park Pelham	335	0	0
All Seasons Condos Weare	325	1	0
Barbara C Harris Camp/conf Ctr Greenfield	320	2	0
Windsor Mtn Internatnl/cabins Windsor	310	0	0
Windsor Mtn Intrnl/dining Hall Windsor	310	0	0
Alpine Grove Events Centre Hollis	300	1	0
Country Three Corners Weare	300	0	0
Dunkin Donuts Kiosk Hillsborough	300	1	0
Parkers Maple Barn/sugar House Mason	300	1	0
Capt Samuel Douglass Academy Brookline	299	1	0
Autumn Hills Campground Weare	280	0	0
Friendly Beaver Cmpground East New Boston	275	0	0
Friendly Beaver Cmpground West New Boston	275	0	0
Crossroads Baptist Church Pelham	260	0	0
Wilds of New England Deering	260	1	0
Cold Springs 3/west Weare	250	0	0
Connies Plaza Hudson	250	1	0
Labelle Winery Amherst	250	0	0
Milford Technology Center Milford	250	0	0
Peterborough Players Theatre Peterborough	250	1	0
Beaver Brook/maple Hill Farm Hollis	245	1	1
Brookline Event Center Brookline	240	1	0
Camp Carpenter Dining Hall Manchester	230	1	0
Beaver Brook ED Center Hollis	220	0	0
Mont Vernon Village Sch Mont Vernon	216	0	0
Second Nature Academy Nashua	212	2	0
26 Clinton Drive Bldg Hollis	200	0	0
Cowboy Cantina Weare	200	2	2
Northwood Plaza Pelham	200	0	0
Young Richardson Post 59 Hillsborough	200	0	0
Amherst Country Club Amherst	180	0	0
Bedford West Convenience Ctr Bedford	180	0	0
Camp Runels Pelham	180	1	0
Pine Hill Waldorf Sch Wilton	180	0	0
High Mowing Sch Wilton	173	0	0
Well School Peterborough	160	2	1
Congregational Church Hollis	150	0	0
Dollar General Store 17171 New Ipswich	150	0	0
Pine Valley Golf Course Pelham	150	1	0
ST Patrick Religious Educ Ctr Pelham	150	0	0
Stonebridge Country Club Goffstown	150	0	0
Hollis Montessori School Hollis	145	0	0
The Sargent Center Hancock	140	0	0
Camp Allen Bedford	137	2	0
Smokehaus Bbq Amherst	135	0	0
Camp Kettleford Bedford	125	0	0
Kelari Greek Taverna Pelham	125	1	0
Ussf Space Force Stn Sat Trkng New Boston	123	0	0
Granite State Cabinetry Bedford	120	1	0
Wediko Kitchen Windsor	120	2	0
Mason Public Sch Mason	110	0	0
Greenfield Elementary Sch Greenfield	109	1	0
Colonial Way Plaza Pelham	107	0	0
Lttr Day ST Chrch/peterborough Peterborough	105	2	0
Brantwood Camp for Girls Greenfield	101	1	0
Black Forest Cafe Amherst	100	0	0
Blackbird Market and Deli Weare	100	1	0
Caryns Country Convenience Str Brookline	100	0	0
Dollar General Store 23246 Weare	100	0	0
Dunkin Donuts Brookline	100	0	0
Hannaford Pelham 8015 Pelham	100	0	0
Hudson Irving Hudson	100	0	0
Island Bowls New Ipswich	100	1	0
Monadnock Comm Early Lng Ctr Peterborough	100	1	0
NE Pentecostal Ministries Pelham	100	0	0
New Ipswich Market New Ipswich	100	0	0
Pelham Plaza Pelham	100	0	0
Ponemah Green Amherst	100	0	0
Rosewald Farm Hillsborough	100	0	0
Strong Foundations New Boston	100	0	0
Brantwood Camp for Boys Greenfield	99	1	0
Harbor Camp/rec Hall Antrim	95	0	0
Harbor Camps/dining Hall Antrim	95	0	0
Harbor Camps/lower Antrim	95	0	0
Learn AS WE Play Chld Care Ctr Goffstown	94	0	0

All 206 in the systems table

Inactive systems (277, no longer operating or reporting)

Kept for the record and excluded from the county totals above. Browse inactive systems.

About this data

Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.

Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The New Hampshire records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet.

Hillsborough County drinking water quality

Needs attention

Community water systems

Compliant

Violations in the past 3 years

Serious violator

Health flag

Inactive system