Massachusetts utilities with soft water.

Up to 60 mg/L (3.5 grains per gallon). 107 utilities serving 5.3 million people as they report it, largest first.

All 107, by people served

Massachusetts utilities with soft water, 1 to 107
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
MWRA	Boston	2,580,000	11	0.7
Boston Water and Sewer Commission (MWRA)	Boston	675,647	11 to 16	0.6 to 0.9
Lowell Regional Water Utility	Lowell	120,418	19	1.1
Brockton Water Department	Brockton	105,788	24	1.4
City of New Bedford Dpi	New Bedford	101,079	16	0.9
Falmouth Water Dept	Falmouth	97,551	16	0.9
Fall River Water Department	Fall River	94,000	8.5	0.5
Lawrence Water Works	Lawrence	89,143	21	1.2
Taunton Water Division	Taunton	62,165	13	0.7
Weymouth Water Department	Weymouth	57,871	15	0.9
Upper Cape Regional Water Cooperative	Sandwich	56,250	13	0.7
Centerville Osterville Marstons Mills WD	Barnstable	50,000	19	1.1
Randolph/Holbrook Joint Water Board	Randolph	46,519	58	3.4
Attleboro Water Dept	Attleboro	46,461	41	2.4
Pittsfield Dpu Water Dept	Pittsfield	43,927	21	1.2
Fitchburg DPW Division of Water Supply	Fitchburg	41,946	7.9	0.5
Marlborough DPW Water Div. (MWRA)	Marlborough	41,799	15	0.9
Harwich Water Department	Harwich	39,144	24	1.4
Braintree Water and Sewer Dept.	Braintree	39,143	52	3
Yarmouth Water Department	Yarmouth	38,900	18	1.1
Holyoke Water Works	Holyoke	37,838	14	0.8
Gloucester Public Utility Division	Gloucester	37,440	18	1
Andover Water Dept	Andover	36,569	38	2.2
Brewster Water Department	Brewster	35,000	27	1.6
Hyannis Water System, Town of Barnstable	Barnstable	35,000	17	1
Tewksbury Water Department	Tewksbury	31,342	33	1.9
North Andover Water Dept	North Andover	30,915	37	2.2
Milford Water Department	Milford	30,379	42	2.5
Chatham Water Department	Chatham	30,000	20	1.2
Mattapoisett River Valley W.D.	Mattapoisett	29,600	35	2
Dartmouth Water Division	Dartmouth	24,696	23	1.3
Oak Bluffs Water District	Oak Bluffs	24,000	20	1.2
Bourne Water District	Bourne	22,500	32	1.9
Provincetown Water Department	Provincetown	22,250	25	1.5
Gardner Water Department	Gardner	21,381	33	1.9
Wareham Fire District	Wareham	20,102	44	2.5
Hudson Water Supply	Hudson	20,032	38	2.2
Southbridge Water Department	Southbridge	19,562	6.9	0.4
Ashland Water and Sewer Dept.	Ashland	18,832	38	2.2
Pembroke Water Division DPW	Pembroke	18,175	45	2.7
Holden Water Division, DPW	Holden	18,016	24	1.4
Orleans Water Department	Orleans	17,460	19	1.1
Swansea Water District	Swansea	17,375	40	2.3
Duxbury Water Department	Duxbury	16,387	34	2
Clinton Water Dept	Clinton	15,428	15	0.9
Fairhaven Water Dept	Fairhaven	15,155	41	2.4
Northborough Water Department (MWRA)	Northborough	13,551	16	0.9
Uxbridge DPW, Water Division	Uxbridge	11,612	43	2.5
Athol DPW Water Division	Athol	10,587	48	2.8
Rockport Water Dept	Rockport	10,000	24	1.4
Aquarion Water Company, Pinehills	Plymouth	9,478	26	1.5
Edgartown Water Department	Edgartown	8,027	13	0.8
Whitinsville Water Company	Northbridge	7,899	24	1.4
Buzzards Bay Water District	Bourne	7,700	16	0.9
Mattapoisett Water Department	Mattapoisett	7,685	33	1.9
Williamstown Water Dept	Williamstown	7,326	13	0.7
Town of Eastham	Eastham	6,199	20	1.1
Marion Water Division	Marion	6,119	31	1.8
Rutland Water Department	Rutland	6,025	22	1.3
Dudley Water Department	Dudley	5,515	42	2.5
Barnstable Fire District	Barnstable	5,400	31	1.8
Dighton Water District	Dighton	5,280	49	2.8
Palmer Water District No.1	Palmer	4,789	54	3.1
North Sagamore Water District	Bourne	4,668	21	1.2
Upton DPW Water/Wastewater Division	Upton	4,420	31	1.8
Douglas Water Department	Douglas	4,400	42	2.4
Monson Water and Sewer Dept	Monson	4,222	34	2
North Raynham Water District	Raynham	3,902	41	2.4
Westminster Department of Public Works	Westminster	3,889	11	0.6
North Brookfield Water Department	North Brookfield	3,863	9.2	0.5
Essex Water Dept.	Essex	3,675	38	2.2
Sunderland Water District	Sunderland	3,190	37	2.1
Siasconset Water Department	Nantucket	3,000	47	2.7
Stockbridge Water Dept	Stockbridge	2,800	59	3.4
Barre Water Department	Barre	2,610	21	1.2
Agawam Springs Water Company	Plymouth	2,380	12	0.7
Aquarion Water Company Ponds of Plymouth	Plymouth	2,267	17	1
West Groton Water Supply District	Groton	1,853	34	2
Williamsburg Water Dept	Williamsburg	1,575	34	2
Bernardston Fire Water Dist	Bernardston	1,471	21	1.2
Chester Water Dept	Chester	750	12	0.7
South Meadow Village	Carver	750	37	2.1
East Northfield Water Co	Northfield	659	11	0.6
Paddock Estates	Boxborough	463	15	0.9
Millbury Ind. Park/ Park Hill Village	Millbury	400	25	1.5
Sturbridge Retirement Coop. Corp.	Sturbridge	350	58	3.4
Pinetree Village	Carver	348	30	1.8
North Carver Water System	Carver	300	26	1.5
The Reserve at Spring Hill	Rehoboth	300	55	3.2
Sea Oaks Condominiums	Mashpee	222	56	3.3
Masac Plymouth	Plymouth	210	7.8	0.5
Townhouses @ Copper Lantern	Carver	176	34	2
River Crossing Condominium	Tyngsborough	150	43	2.5
Holmes Park Water District	Westminster	131	16	0.9
Aquarion Water Co. (Springdale Farms)	Dover	126	60	3.5
Lancaster Woods Condominiums	Lancaster	120	51	3
Cobblers Creek Condominiums	Upton	118	4.7	0.3
Beechwood Point Condos	Mashpee	112	52	3
Deerfield Estates	Hopkinton	100	1	0.1
The Meeting House @ Stow Condo	Stow	92	1	0.1
Nemasket Health Care Center	Middleborough	90	49	2.9
Granville Centre Water Co	Granville	70	48	2.8
Haystack Estates	Westford	60	37	2.2
Maillet Woods Condominiums	Hopkinton	55	0.9	0.1
Madden Estates	West Brookfield	50	22	1.3
Buffumville Heights Estates Condominium	Oxford	40	30	1.7
Hubbardston House Apartments	Hubbardston	40	54	3.2

Source: Massachusetts Department of Environmental Protection, Drinking Water Program, 287 utilities, results from Jan. 5, 2015 to Sept. 23, 2026, read Oct. 10, 2026. Each sampling point is taken at its median; a figure is typical where every point falls in one band.

Also: 1 utility’s own water quality reports, read by hand, each named on the utility’s page.

Bands are the U.S. Geological Survey’s, at 17.1 mg/L to the grain. People served is what each utility reports; where one sells water to another, the same people can be counted twice. How hardness is measured here.

All 107, by people served

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