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Pennsylvania Water Quality
7,701 public water systems serving 12,630,061 people.
Water Systems
7,701
Total Violations
1,159,868
Violation Rate
97.1%
PFAS Detection
57.6%
224 of 389 tested
Largest Water Systems
PHILADELPHIA WATER DEPARTMENT
PHILADELPHIA, PA · 1,600,000 served
AQUA PA MAIN SYSTEM
BRYN MAWR, PA · 822,600 served
PA AMER WATER CO-PITTSBURGH
MCMURRAY, PA · 686,000 served
PITTSBURGH WATER & SEWER AUTH
PITTSBURGH, PA · 520,000 served
ERIE CITY WATER AUTHORITY
ERIE, PA · 220,001 served
YORK WATER CO
YORK, PA · 206,762 served
WEST VIEW WATER AUTHORITY
PITTSBURGH, PA · 200,000 served
MAWC SWEENEY PLANT
GREENSBURG, PA · 143,000 served
CHESTER WATER AUTHORITY
CHESTER, PA · 140,437 served
PA AMER WATER CO LAKE SCRANTON
WILKES BARRE, PA · 134,570 served
MAWC YOUGH PLANT
GREENSBURG, PA · 133,000 served
WILKINSBURG-PENN JT WATER AUTH
WILKINSBURG, PA · 125,000 served
CITY OF LANCASTER
LANCASTER, PA · 120,000 served
LCA ALLENTOWN DIVISION
ALLENTOWN, PA · 118,000 served
CITY OF BETHLEHEM
BETHLEHEM, PA · 117,259 served
VEOLIA WATER
HARRISBURG, PA · 110,000 served
PA AMERICAN WATER CO WEST
MECHANICSBURG, PA · 105,127 served
EASTON AREA WATER SYSTEM
EASTON, PA · 96,867 served
READING AREA WATER AUTHORITY
READING, PA · 95,100 served
NORTH PENN WATER AUTHORITY
LANSDALE, PA · 91,941 served
Most Violations
#1 CONGREGATION OHR MENACHEM CANADENSIS
9,908 #2 SALEM HEIGHTS ESTATE LAKE ARIEL
6,572 #3 PA AMERICAN AUDUBON NORRISTOWN
5,456 #4 AQUA PA SUN VALLEY WHITEHAVEN
4,752 #5 COBBS LAKE PRESERVE LAKE ARIEL
3,507 #6 ROBINWOOD VILLAGE SAYLORSBURG
3,499 #7 PARADISE STREAM RESOR MOUNT POCONO
3,309 #8 MOUNT EAGLE WATER ASSOC HOWARD
3,283 #9 NOTTINGHAM MANOR M H COURT NOTTINGHAM
3,266 #10 TOWER SPRINGS LLC MALVERN,
3,062 #11 NESHAMINY MANOR CENTER WARRINGTON
3,037 #12 SUNRISE LAKES SEC 12 MOSCOW
2,993 #13 NEWPORT BORO WATER AUTH NEWPORT
2,935 #14 AMBLER BORO WATER DEPT AMBLER
2,896 #15 MCCONNELLSBURG BORO MUNI AUTH MC CONNELLSBURG
2,725 Counties in Pennsylvania
Allegheny
69 systems · 2,014,752 served
· 5,241 violations
Philadelphia
6 systems · 1,601,175 served
· 447 violations
Montgomery
172 systems · 1,274,688 served
· 36,032 violations
Bucks
299 systems · 599,107 served
· 59,577 violations
Lancaster
434 systems · 406,457 served
· 39,193 violations
York
208 systems · 389,602 served
· 25,528 violations
Berks
493 systems · 382,268 served
· 54,767 violations
Northampton
205 systems · 334,919 served
· 15,627 violations
Luzerne
251 systems · 325,882 served
· 44,749 violations
Erie
146 systems · 304,235 served
· 23,068 violations
Chester
276 systems · 302,878 served
· 47,248 violations
Lehigh
201 systems · 294,981 served
· 15,405 violations
Dauphin
145 systems · 294,232 served
· 21,033 violations
Westmoreland
82 systems · 262,918 served
· 12,979 violations
Fayette
41 systems · 255,694 served
· 10,137 violations
Cumberland
99 systems · 249,438 served
· 10,230 violations
Monroe
443 systems · 188,975 served
· 72,365 violations
Centre
78 systems · 182,614 served
· 21,783 violations
Beaver
96 systems · 179,116 served
· 14,356 violations
Lackawanna
119 systems · 172,971 served
· 22,460 violations
Butler
182 systems · 159,830 served
· 24,329 violations
Delaware
23 systems · 151,505 served
· 3,592 violations
Cambria
70 systems · 141,807 served
· 19,662 violations
Franklin
122 systems · 136,296 served
· 18,681 violations
Schuylkill
188 systems · 132,673 served
· 19,535 violations
Blair
53 systems · 101,979 served
· 8,263 violations
Lebanon
109 systems · 101,380 served
· 8,644 violations
Mercer
146 systems · 98,473 served
· 18,095 violations
Northumberland
66 systems · 93,484 served
· 9,157 violations
Lycoming
135 systems · 89,254 served
· 31,610 violations
Showing top 30 of 68 counties.