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2,908 Pennsylvania water systems have inventoried 3,929,613 service lines for EPA. 65,295 (1.7%) are confirmed lead and 2,057,908 (52%) are still of unknown material. Below: every large or city-linked Pennsylvania utility ranked by lead lines.
Pennsylvania water systems reported 65,295 lead service lines and 48,443 galvanized lines requiring replacement as of Q2 2026 — 1.7% of the 3,929,613 lines inventoried and 3.0% of the national lead total, ranking #9 of 51. PHILADELPHIA WATER DEPARTMENT reports the most in the state (16,805).
PHILADELPHIA WATER DEPARTMENT (16,805), PITTSBURGH WATER & SEWER AUTH (16,165), LCA ALLENTOWN DIVISION (4,552) lead the list; 173 Pennsylvania systems report at least one lead line in total.
Find your utility in the table below, then check its published service line inventory (most utilities post an address-lookup map) or call the number on your water bill. Utilities must notify customers whose line is lead, galvanized-requiring-replacement or unknown. You can also test the pipe entering your home: lead is soft, dull gray, non-magnetic and turns shiny when scratched.
Under EPA's Lead and Copper Rule Improvements, systems must replace lead and galvanized-requiring-replacement lines within 10 years starting in 2027; systems with very high counts can receive longer deadlines. Ask your utility for its replacement plan and whether it covers the homeowner-owned portion.
Use a filter certified to NSF/ANSI 53 for lead for drinking and cooking, flush the tap after water has sat for hours, never use hot tap water for drinking or infant formula, and confirm your actual level with a certified lab test.
Source: EPA SDWIS Service Line Inventory, Q2 2026 snapshot (updated 2026-08-18). Counts are service lines, not people.
A certified mail-in lab test shows exactly what's in your water — lead plus dozens of other contaminants — with EPA-grade accuracy. Know your real levels before spending on a filter.
Certified lab · results in days
Community systems serving 50,000+ people plus systems linked to a city report on this site (35 shown). State totals above include every reporting system.
| # | Water system | Status | Lead | GRR | Unknown | Total lines | City report |
|---|---|---|---|---|---|---|---|
| 1 | PHILADELPHIA WATER DEPARTMENT PA1510001 · 1,600,000 served | Lead service lines present | 16,805 | 1,777 | 351,513 | 527,919 | |
| 2 | PITTSBURGH WATER & SEWER AUTH PA5020038 · 520,000 served | Lead service lines present | 16,165 | 2,250 | 2,361 | 80,528 | |
| 3 | LCA ALLENTOWN DIVISION PA3390024 · 118,000 served | Lead service lines present | 4,552 | 5,839 | 20,894 | 31,999 | |
| 4 | PA AMER WATER CO-PITTSBURGH PA5020039 · 686,000 served | Lead service lines present | 4,290 | 1,780 | 207,101 | 230,084 | |
| 5 | WILKINSBURG-PENN JT WATER AUTH PA5020056 · 125,000 served | Lead service lines present | 3,704 | 134 | 5,828 | 44,686 | |
| 6 | MAWC SWEENEY PLANT PA5650032 · 143,000 served | Lead service lines present | 2,408 | 272 | 1,911 | 64,985 | |
| 7 | WILLIAMSPORT MUN WATER AUTH PA4410173 · 51,000 served | Lead service lines present | 1,690 | 5 | 17,268 | 18,964 | |
| 8 | WEST VIEW WATER AUTHORITY PA5020043 · 200,000 served | Lead service lines present | 567 | 205 | 18,428 | 62,701 | |
| 9 | CITY OF LANCASTER PA7360058 · 120,000 served | Lead service lines present | 474 | 0 | 42,841 | 49,714 | |
| 10 | PA AMER WATER CO LAKE SCRANTON PA2359008 · 137,142 served | Lead service lines present | 271 | 657 | 49,696 | 58,687 | |
| 11 | HAMPTON SHALER WATER AUTHORITY PA5020019 · 61,949 served | Lead service lines present | 234 | 2 | 23,919 | 24,845 | |
| 12 | CHESTER WATER AUTHORITY PA1230004 · 140,437 served | Lead service lines present | 148 | 1 | 38,696 | 47,939 | |
| 13 | MAWC YOUGH PLANT PA5260036 · 133,000 served | Lead service lines present | 135 | 114 | 889 | 53,390 | |
| 14 | PAW CEASETOWN PA2409002 · 58,467 served | Lead service lines present | 127 | 370 | 29,346 | 31,988 | |
| 15 | LEBANON WATER AUTH PA7380010 · 57,000 served | Lead service lines present | 121 | 62 | 10,342 | 20,512 | |
| 16 | PAW NESBITT PA2409010 · 52,640 served | Lead service lines present | 80 | 134 | 13,972 | 15,588 | |
| 17 | PAW WATRES PA2409011 · 52,002 served | Lead service lines present | 79 | 282 | 22,620 | 25,383 | |
| 18 | AQUA PA MAIN SYSTEM PA1460073 · 822,600 served | Lead service lines present | 55 | 4,595 | 39,217 | 305,008 | |
| 19 | PA AMERICAN NORRISTOWN PA1460046 · 88,885 served | Lead service lines present | 43 | 374 | 30,340 | 34,495 | |
| 20 | PA AMERICAN WATER CO WEST PA7210029 · 105,127 served | Lead service lines present | 39 | 1,712 | 32,832 | 43,594 | |
| 21 | NORTH PENN WATER AUTHORITY PA1460034 · 91,941 served | Lead service lines present | 34 | 26 | 0 | 35,133 | |
| 22 | EASTON AREA WATER SYSTEM PA3480050 · 96,867 served | Lead service lines present | 21 | 21 | 23,011 | 30,928 | |
| 23 | CAPITAL REGION WATER PA7220049 · 66,540 served | Lead service lines present | 15 | 479 | 0 | 21,176 | |
| 24 | PA AMER WATER CO PA7220017 · 50,200 served | Lead service lines present | 11 | 402 | 19,709 | 21,912 | |
| 25 | YORK WATER CO PA7670100 · 206,762 served | Lead service lines present | 9 | 111 | 71,283 | 71,671 | |
| 26 | READING AREA WATER AUTHORITY PA3060059 · 95,100 served | Lead service lines present | 2 | 254 | 20,112 | 34,305 | |
| 27 | NORTH WALES WATER AUTHORITY PA1460048 · 72,496 served | Lead service lines present | 2 | 3 | 17,382 | 24,730 | |
| 28 | CITY OF BETHLEHEM PA3480046 · 117,259 served | Lead service lines present | 0 | 777 | 29,933 | 37,089 | |
| 29 | ERIE CITY WATER AUTHORITY PA6250028 · 220,001 served | Lead service lines present | 0 | 1,312 | 26,597 | 58,201 | |
| 30 | BCWSA MAIN LOWER SOUTH PA1090079 · 52,621 served | Many lines still unverified | 0 | 0 | 12,784 | 14,770 | |
| 31 | STATE COLLEGE BORO WATER AUTH PA4140096 · 72,000 served | Lead service lines present | 0 | 7 | 8,710 | 15,478 | |
| 32 | ALTOONA WATER AUTHORITY PA4070023 · 62,500 served | Lead service lines present | 0 | 6,598 | 8,683 | 23,663 | |
| 33 | AQUA PA BENSALEM PA1090078 · 59,001 served | Lead service lines present | 0 | 6 | 5,735 | 12,999 | |
| 34 | VEOLIA WATER PA7220015 · 110,000 served | Lead service lines present | 0 | 186 | 0 | 38,322 | |
| 35 | LOWER BUCKS CO JOINT MUN AUTH PA1090026 · 63,007 served | No lead service lines reported | 0 | 0 | 0 | 19,487 |
A lead or unknown service line means lead can enter water after it leaves the treatment plant, so city-level test results understate what reaches your tap. Filter drinking and cooking water with an NSF/ANSI 53 lead-certified system, and see the lead in drinking water guide or Pennsylvania city water reports.
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