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Lead service lines in Illinois

Lead service line inventory data for 1794 of the largest Illinois community water systems. Of those, 554 report no confirmed lead lines. Sourced from each utility's published inventory under EPA's LCRR.

At a glance

Utilities covered
1,794
Reporting no lead lines
554
of 1794 covered
Confirmed lead lines
384,400
across utilities that itemized
Galvanized requiring replacement
6,111
LCRI treats GRR as lead

Utilities with confirmed lead or galvanized service lines

Systems in Illinois where the published inventory has identified at least one lead or galvanized-requiring- replacement service line. The LCRI requires replacement within 10 years.

  1. 1. Chicago (PWS)

    PWSID IL0316000 · serves 2.7M

    150,767 lead
  2. 2. Aurora (PWS)

    PWSID IL0894070 · serves 183k

    16,463 lead
  3. 3. Cicero (PWS)

    PWSID IL0310510 · serves 83k

    15,201 lead
  4. 4. Rockford (PWS)

    PWSID IL2010300 · serves 147k

    12,823 lead
  5. 5. Des Plaines (PWS)

    PWSID IL0310630 · serves 61k

    11,542 lead
  6. 6. Evanston (PWS)

    PWSID IL0310810 · serves 74k

    10,564 lead
  7. 7. Illinois American - Peoria (PWS)

    PWSID IL1435030 · serves 138k

    10,322 lead
  8. 8. Elgin PWS

    PWSID IL0894380 · serves 115k

    10,206 lead
  9. 9. Evergreen Park (PWS)

    PWSID IL0310840 · serves 20k

    6,644 lead
  10. 10. Bloomington (PWS)

    PWSID IL1130200 · serves 78k

    5,866 lead
  11. 11. Quincy (PWS)

    PWSID IL0010650 · serves 42k

    5,457 lead
  12. 12. Calumet City (PWS)

    PWSID IL0310390 · serves 37k

    4,358 lead 810 GRR
  13. 13. Maywood (PWS)

    PWSID IL0311830 · serves 24k

    5,000 lead 50 GRR
  14. 14. Moline (PWS)

    PWSID IL1610450 · serves 45k

    4,675 lead
  15. 15. Arlington Heights (PWS)

    PWSID IL0314030 · serves 73k

    3,912 lead
  16. 16. Oak Park (PWS)

    PWSID IL0312250 · serves 55k

    3,777 lead
  17. 17. Homewood (PWS)

    PWSID IL0311350 · serves 19k

    3,767 lead
  18. 18. Westchester (PWS)

    PWSID IL0313150 · serves 16k

    3,663 lead
  19. 19. La Grange (PWS)

    PWSID IL0311530 · serves 16k

    3,577 lead
  20. 20. St Charles (PWS)

    PWSID IL0894830 · serves 33k

    2,870 lead

Utilities with the largest unknown counts

Systems where many service line materials remain unclassified. Under the LCRI all unknowns must be resolved by the end of the 10-year replacement window.

  1. 1. Chicago (PWS)

    PWSID IL0316000 · serves 2.7M

    336,580 unknown
  2. 2. Springfield (PWS)

    PWSID IL1671200 · serves 117k

    54,517 unknown
  3. 3. Aurora (PWS)

    PWSID IL0894070 · serves 183k

    33,161 unknown
  4. 4. Decatur - South WTP

    PWSID IL1150150 · serves 76k

    30,689 unknown
  5. 5. Rockford (PWS)

    PWSID IL2010300 · serves 147k

    27,009 unknown
  6. 6. Bloomington (PWS)

    PWSID IL1130200 · serves 78k

    26,225 unknown
  7. 7. Elgin PWS

    PWSID IL0894380 · serves 115k

    23,988 unknown
  8. 8. Illinois American - Alton (PWS)

    PWSID IL1195150 · serves 46k

    21,839 unknown
  9. 9. Illinois American - Granite City (PWS)

    PWSID IL1195030 · serves 28k

    20,520 unknown
  10. 10. Illinois American - Peoria (PWS)

    PWSID IL1435030 · serves 138k

    19,904 unknown
  11. 11. Illinois American - East St Louis (PWS)

    PWSID IL1635040 · serves 131k

    19,429 unknown
  12. 12. Aqua Illinois-Vermilion County (PWS)

    PWSID IL1835120 · serves 30k

    18,703 unknown
  13. 13. Arlington Heights (PWS)

    PWSID IL0314030 · serves 73k

    16,627 unknown
  14. 14. Glenview (PWS)

    PWSID IL0311020 · serves 48k

    15,992 unknown
  15. 15. Joliet (PWS)

    PWSID IL1970450 · serves 160k

    15,976 unknown
  16. 16. Skokie (PWS)

    PWSID IL0312880 · serves 66k

    15,796 unknown
  17. 17. Hoffman Estates (PWS)

    PWSID IL0311290 · serves 50k

    15,042 unknown
  18. 18. Waukegan (PWS)

    PWSID IL0971900 · serves 87k

    14,864 unknown
  19. 19. Bartlett (PWS)

    PWSID IL0314120 · serves 42k

    14,441 unknown
  20. 20. Elmhurst (PWS)

    PWSID IL0430350 · serves 45k

    13,831 unknown

Lead service lines by city

Cities in Illinois where at least one community water system based there has published service line inventory data.

How this page is verified

Each utility's row is sourced directly from that utility's own published Lead Service Line Inventory page (no federal aggregator exists). An automated verifier re-fetches every source URL on a monthly cron and fails CI if a utility's published claim is no longer present on its page or if a numeric count we recorded has drifted. See methodology for the full integrity pipeline.

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