Pennsylvania water hardness, by utility.

64 Pennsylvania utilities serving 2 million people as they report it, from the state’s own results. Hardness is the calcium and magnesium in water; EPA sets no limit for it.

The short answer

7 utilities serving 1.6 million people have water in more than one band. Among those in one band, soft water reaches the most people: 14 utilities serving 214,065.

The largest, Philadelphia Water Department, is moderately hard to hard depending on the source, 101 to 169 mg/L (5.9 to 9.9 grains per gallon).

Very hard

Above 180 mg/L (10.5 grains per gallon). 20 utilities serving 137,500 people, largest first.

Pennsylvania utilities: very hard water
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Lca Wlsa Central Division	Allentown	47,693	244	14.3
Veolia Mechanicsburg	Harrisburg	45,013	323	18.9
Nwwa Warrington Township	North Wales	21,588	354	20.7
Veolia Water PA Dallas	Harrisburg	7,563	238	13.9
College Twp Water Authority	State College	6,000	351	20.5
Beech Creek Borough Authority	Beech Creek	1,800	265	15.5
Lca Arcadia West Division	Allentown	1,392	237	13.8
Lca Emmaus Consecutive Div	Allentown	1,046	183	10.7
Trumbauersville Mun Waterworks	Trumbauersville	974	330	19.3
McAlisterville Area Joint Auth	Mc Alisterville	850	299	17.5
Warriors Mark Gen Auth	Warriors Mark	750	212	12.4
Eei Meadows Complex	Dallas	628	201	11.8
Echo Valley Estates	Shavertown	490	195	11.4
Cedar Manor MHP	Morgantown	432	307	17.9
Veolia Water PA Inc Ccip	Bloomsburg	419	240	14
W Freedom Water Assn	Parker	250	493	28.9
Loysville Youth Dev Ctr	Loysville	249	313	18.3
Imperial Mobile Home Park	Morgantown	151	229	13.4
Lca Beverly Hills Division	Allentown	122	213	12.5
Miller Manor Homeowners Assoc	Northampton	90	306	17.9

Hard

121 to 180 mg/L (7.1 to 10.5 grains per gallon). 10 utilities serving 36,081 people, largest first.

Pennsylvania utilities: hard water
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
MT Joy Boro Auth	Mount Joy	15,261	170	9.9
Emmaus Borough Public Water	Emmaus	14,000	141	8.2
Spring Twp Water Authority	Bellefonte	3,300	167	9.8
Upper Halfmoon Water	Port Matilda	1,500	137	8
Westtown School	West Chester	900	165	9.6
Lca Heidelberg Heights Div	Allentown	509	151	8.8
Lca Upper Milford Central Div	Allentown	256	176	10.3
Martins Community Lp MHP	Cochranville	180	153	8.9
Providence Place of Hazleton	Drums	140	160	9.3
Country Acres Personal Care	Titusville	35	126	7.4

Moderately hard

61 to 120 mg/L (3.6 to 7 grains per gallon). 13 utilities serving 11,512 people, largest first.

Pennsylvania utilities: moderately hard water
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Aqua PA Greenville	Sharon	8,600	93	5.4
Lca Washington Township Div	Allentown	965	73	4.2
Lake Wallenpaupack Sandy Shore	Lakeville	499	77	4.5
Sugar Creek Resthome	Worthington	323	83	4.8
Wetherill Estates	Exton	250	91	5.3
Sbwja Grove Park	Bellefonte	185	82	4.8
Lca Clearview Farm Estates Div	Allentown	170	81	4.7
Lca Pine Lakes Division	Allentown	158	64	3.8
Masons Mobile City	Moscow	140	87	5.1
Maplewood Mobile Home Park	Bowmansville	70	108	6.3
Echo Valley MHP	North East	60	68	4
Highland Court	Parkesburg	54	80	4.7
Schoolhouse Hill Apts	Montrose	38	74	4.4

Soft

Up to 60 mg/L (3.5 grains per gallon). 14 utilities serving 214,065 people, largest first.

Pennsylvania utilities: soft water
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Easton Area Water System	Easton	96,867	44	2.6
Lebanon Water Auth	Lebanon	57,000	56	3.3
Hca Hazleton Division	Hazleton	45,000	16	0.9
Municipal Authority Sunbury	Sunbury	11,043	54	3.1
South Mountain Restoration Ctr	South Mountain	950	7.8	0.5
Bowmanstown Authority	Bowmanstown	900	31	1.8
Alexandria Boro Water Auth	Alexandria	815	22	1.3
E Bangor Mun Authority	East Bangor	800	37	2.2
Skytop Lodge Inc	Skytop	300	46	2.7
Four Seasons Estates MHP	Mountain Top	98	25	1.5
Getz Personal Care Home	Kunkletown	95	46	2.7
Pithole Water Association	Smethport	87	59	3.5
Perry Phillips Mobile Homes	Coatesville	60	8.2	0.5
White Rock Mobile Home Park	Lake City	50	52	3

Varies

Water in more than one band, depending on where or when it was sampled: each is given as its range, softest to hardest, and its report says more. 7 utilities serving 1.6 million people, largest first.

Pennsylvania utilities: varies water
Utility	Based in	Serves	Hardness, mg/L	Grains per gallon
Philadelphia Water Department	Philadelphia	1,600,000	101 to 169	5.9 to 9.9
Doylestown Boro Water Dept	Doylestown	8,700	136 to 287	7.9 to 16.8
Upper Saucon Twp Water Supply	Center Valley	7,300	95 to 196	5.5 to 11.5
Jersey Shore Area Jnt Wat Auth	Jersey Shore	6,600	61 to 131	3.6 to 7.7
Pocono Manor Inn	Pocono Manor	300	73 to 129	4.3 to 7.5
Buckingham Twp Fieldstone	Buckingham	281	117 to 128	6.8 to 7.5
Eden Glen Village	Strasburg	80	52 to 66	3 to 3.9

Source: Pennsylvania Department of Environmental Protection, Drinking Water Reporting System, 63 utilities, results from Jan. 9, 2020 to Sept. 24, 2026, read Oct. 17, 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.

Very hard

Hard

Moderately hard

Soft

Varies

Where to go next