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Lead service lines in California

Lead service line inventory data for 3803 of the largest California community water systems. Of those, 3296 report no confirmed lead lines. Sourced from each utility's published inventory under EPA's LCRR.

At a glance

Utilities covered
3,803
Reporting no lead lines
3,296
of 3803 covered
Confirmed lead lines
9
across utilities that itemized
Galvanized requiring replacement
12,494
LCRI treats GRR as lead

Utilities with confirmed lead or galvanized service lines

Systems in California 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. EAST BAY MUD

    PWSID CA0110005 · serves 1.4M

    3,935 GRR
  2. 2. WESTERN HEIGHTS WATER COMPANY

    PWSID CA3610053 · serves 7,705

    1,462 GRR
  3. 3. SAN LUIS OBISPO WATER DEPARTMENT

    PWSID CA4010009 · serves 48k

    890 GRR
  4. 4. CHINO, CITY OF

    PWSID CA3610012 · serves 86k

    872 GRR
  5. 5. NORWALK - CITY, WATER DEPT.

    PWSID CA1910191 · serves 20k

    751 GRR
  6. 6. SFPUC CITY DISTRIBUTION DIVISION

    PWSID CA3810011 · serves 848k

    653 GRR
  7. 7. SONOMA, CITY OF

    PWSID CA4910012 · serves 12k

    483 GRR
  8. 8. VICTORVILLE WATER DISTRICT

    PWSID CA3610052 · serves 136k

    408 GRR
  9. 9. CHESTER PUBLIC U.D.

    PWSID CA3210009 · serves 2,187

    201 GRR
  10. 10. OAKDALE, CITY OF

    PWSID CA5010014 · serves 23k

    176 GRR
  11. 11. CITY OF GRASS VALLEY

    PWSID CA2910001 · serves 4,947

    154 GRR
  12. 12. EL SEGUNDO-CITY, WATER DEPT.

    PWSID CA1910040 · serves 16k

    145 GRR
  13. 13. GREENFIELD, CITY OF

    PWSID CA2710008 · serves 19k

    144 GRR
  14. 14. TULARE, CITY OF

    PWSID CA5410015 · serves 72k

    142 GRR
  15. 15. RIVERBANK, CITY OF

    PWSID CA5010018 · serves 25k

    134 GRR
  16. 16. CITY OF TUSTIN

    PWSID CA3010046 · serves 67k

    130 GRR
  17. 17. PETALUMA, CITY OF

    PWSID CA4910006 · serves 61k

    122 GRR
  18. 18. GONZALES, CITY OF

    PWSID CA2710007 · serves 8,327

    122 GRR
  19. 19. CITY OF FAIRFIELD

    PWSID CA4810003 · serves 120k

    91 GRR
  20. 20. BANNING HTS. MUTUAL WATER CO.

    PWSID CA3301031 · serves 567

    81 GRR

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. CITY OF FRESNO

    PWSID CA1010007 · serves 546k

    85,548 unknown
  2. 2. CWS - BAKERSFIELD

    PWSID CA1510003 · serves 268k

    52,060 unknown
  3. 3. CALIFORNIA WATER SERVICE - STOCKTON

    PWSID CA3910001 · serves 176k

    39,837 unknown
  4. 4. CITY OF VALLEJO

    PWSID CA4810007 · serves 121k

    36,385 unknown
  5. 5. CALIFORNIA WATER SERVICE CO. - DOMINGUEZ

    PWSID CA1910033 · serves 144k

    31,869 unknown
  6. 6. CWS - VISALIA

    PWSID CA5410016 · serves 148k

    28,174 unknown
  7. 7. CALIFORNIA WATER SERVICE CO. - ELA

    PWSID CA1910036 · serves 152k

    26,874 unknown
  8. 8. CALIFORNIA WATER SERVICE CO. - HERM/REDO

    PWSID CA1910134 · serves 97k

    24,355 unknown
  9. 9. CALIFORNIA WATER SERVICE CO. - PALOS VER

    PWSID CA1910104 · serves 71k

    23,500 unknown
  10. 10. CITY OF SANTA MARIA UTILITIES DEPARTMENT

    PWSID CA4210011 · serves 109k

    19,743 unknown
  11. 11. CAL-WATER SERVICE CO.-CHICO

    PWSID CA0410002 · serves 115k

    19,384 unknown
  12. 12. CORONA, CITY OF

    PWSID CA3310037 · serves 169k

    19,144 unknown
  13. 13. BAKERSFIELD, CITY OF

    PWSID CA1510031 · serves 160k

    16,291 unknown
  14. 14. CWSC LOS ALTOS SUBURBAN

    PWSID CA4310001 · serves 70k

    15,503 unknown
  15. 15. CALIFORNIA WATER SERVICE-S SAN FRANCISCO

    PWSID CA4110009 · serves 64k

    15,446 unknown
  16. 16. CALIFORNIA WATER SERVICE - LIVERMORE

    PWSID CA0110003 · serves 60k

    14,400 unknown
  17. 17. PORTERVILLE, CITY OF

    PWSID CA5410010 · serves 63k

    12,717 unknown
  18. 18. MONTEREY PARK-CITY, WATER DEPT.

    PWSID CA1910092 · serves 62k

    12,178 unknown
  19. 19. GOLETA WATER DISTRICT

    PWSID CA4210004 · serves 84k

    11,938 unknown
  20. 20. CITY OF DAVIS

    PWSID CA5710001 · serves 67k

    10,076 unknown

Lead service lines by city

Cities in California 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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