Lead pipes by county in Michigan
Lead, galvanized and unknown service lines reported by the water systems serving each Michigan county.
| County | Lead | Galv. | Unknown | Systems |
|---|
| Alcona County | 2 | 87 | 0 | 1 |
| Alger County | 0 | 214 | 1 | 1 |
| Allegan County | 982 | 1,968 | 1 | 8 |
| Alpena County | 7 | 68 | 3,657 | 2 |
| Antrim County | 404 | 419 | 132 | 6 |
| Arenac County | 0 | 11 | 0 | 2 |
| Baraga County | 0 | 0 | 92 | 2 |
| Barry County | 856 | 991 | 5 | 4 |
| Bay County | 3,394 | 908 | 429 | 17 |
| Benzie County | 0 | 238 | 44 | 3 |
| Berrien County | 2,692 | 1,753 | 10,830 | 20 |
| Branch County | 1,270 | 466 | 18 | 4 |
| Calhoun County | 4,276 | 353 | 7,250 | 9 |
| Cass County | 1,342 | 674 | 17 | 6 |
| Charlevoix County | 801 | 641 | 1,899 | 6 |
| Cheboygan County | 35 | 97 | 1,547 | 2 |
| Chippewa County | 199 | 186 | 0 | 2 |
| Clare County | 0 | 228 | 45 | 3 |
| Clinton County | 90 | 305 | 623 | 4 |
| Crawford County | 0 | 243 | 0 | 1 |
| Delta County | 3,999 | 339 | 0 | 3 |
| Dickinson County | 2,491 | 983 | 1,251 | 5 |
| Eaton County | 1,489 | 479 | 871 | 7 |
| Emmet County | 5 | 159 | 971 | 7 |
| Genesee County | 785 | 595 | 4,594 | 17 |
| Gladwin County | 0 | 0 | 331 | 2 |
| Gogebic County | 119 | 204 | 1,092 | 6 |
| Grand Traverse County | 2 | 350 | 1,239 | 7 |
| Gratiot County | 4 | 534 | 625 | 4 |
| Hillsdale County | 211 | 970 | 263 | 5 |
| Houghton County | 79 | 51 | 1,909 | 10 |
| Huron County | 2 | 33 | 1,567 | 9 |
| Ingham County | 952 | 74 | 5,341 | 10 |
| Ionia County | 160 | 697 | 2,325 | 7 |
| Iosco County | 0 | 6 | 0 | 4 |
| Iron County | 40 | 61 | 692 | 9 |
| Isabella County | 1 | 67 | 695 | 5 |
| Jackson County | 7,840 | 1 | 3,602 | 7 |
| Kalamazoo County | 4,740 | 589 | 0 | 6 |
| Kalkaska County | 0 | 629 | 0 | 1 |
| Kent County | 19,858 | 657 | 2,301 | 16 |
| Keweenaw County | 0 | 9 | 60 | 2 |
| Lake County | 23 | 5 | 51 | 1 |
| Lapeer County | 21 | 11 | 500 | 5 |
| Leelanau County | 102 | 55 | 100 | 4 |
| Lenawee County | 784 | 2,502 | 1,906 | 12 |
| Livingston County | 7 | 63 | 1,485 | 16 |
| Luce County | 90 | 715 | 64 | 3 |
| Mackinac County | 84 | 242 | 11 | 2 |
| Macomb County | 1,557 | 867 | 26,298 | 21 |
| Manistee County | 258 | 740 | 149 | 3 |
| Marquette County | 129 | 138 | 3,812 | 9 |
| Mason County | 29 | 1,390 | 1,565 | 3 |
| Mecosta County | 0 | 0 | 41 | 1 |
| Menominee County | 364 | 380 | 0 | 2 |
| Midland County | 0 | 81 | 1,077 | 7 |
| Missaukee County | 189 | 56 | 0 | 1 |
| Monroe County | 780 | 560 | 905 | 8 |
| Montcalm County | 411 | 2,121 | 631 | 8 |
| Muskegon County | 12,866 | 4,030 | 0 | 14 |
| Newaygo County | 540 | 353 | 268 | 6 |
| Oakland County | 4,843 | 1,053 | 24,876 | 63 |
| Oceana County | 607 | 653 | 133 | 3 |
| Ogemaw County | 2 | 29 | 0 | 1 |
| Ontonagon County | 103 | 45 | 92 | 4 |
| Osceola County | 226 | 504 | 0 | 3 |
| Otsego County | 176 | 166 | 413 | 1 |
| Ottawa County | 4,603 | 2,868 | 215 | 15 |
| Presque Isle County | 177 | 65 | 0 | 2 |
| Roscommon County | 0 | 57 | 393 | 1 |
| Saginaw County | 6,337 | 148 | 2,134 | 22 |
| Sanilac County | 39 | 34 | 753 | 6 |
| Schoolcraft County | 121 | 275 | 685 | 2 |
| Shiawassee County | 2,243 | 1,958 | 92 | 6 |
| St. Clair County | 386 | 464 | 13,605 | 18 |
| St. Joseph County | 3,351 | 281 | 449 | 10 |
| Tuscola County | 138 | 1,278 | 497 | 7 |
| Van Buren County | 802 | 914 | 3,258 | 9 |
| Washtenaw County | 203 | 902 | 4,163 | 17 |
| Wayne County | 99,027 | 11,317 | 134,685 | 43 |
| Wexford County | 0 | 149 | 247 | 3 |
Systems serving several counties are counted in each. Source: EPA SDWIS service line inventory, 2026 Q3.