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ZIP 94507

Water quality in Alamo, CA (94507)

Drinking water in ZIP 94507 (Alamo, Contra Costa County) comes from 40 public water system s on EPA's records. The list below is ranked by population served: the largest regional authority for your area appears first, smaller subdivisions and private systems below.

Combined population served: 560,206 people.

Public water systems serving ZIP 94507

Ranked by population served. Tier badges show how EPA records each utility's service area: "Serves your city" means EPA's geographic-areas table specifically lists Alamo; "Serves your county" means the utility serves Contra Costa County (regional authorities are usually filed this way); "Billing address at this ZIP" means the utility files paperwork from this ZIP but EPA does not confirm it serves you.

  1. CONTRA COSTA WATER DISTRICT

    CONCORD · PWSID CA0710003

    Serves 198k people

    Serves your county
  2. CITY OF ANTIOCH

    ANTIOCH · PWSID CA0710001

    Serves 115k people

    Serves your county
  3. BRENTWOOD

    BRENTWOOD · PWSID CA0710004

    Serves 65k people

    Serves your county
  4. CITY OF PITTSBURG

    PITTSBURG · PWSID CA0710008

    Serves 63k people

    Serves your county
  5. DIABLO WATER DISTRICT

    OAKLEY · PWSID CA0710007

    Serves 43k people

    Serves your county
  6. CITY OF MARTINEZ

    MARTINEZ · PWSID CA0710006

    Serves 31k people

    Serves your county
  7. GOLDEN STATE WATER COMPANY - BAY POINT

    RANCHO CORDOVA · PWSID CA0710002

    Serves 24k people

    Serves your county
  8. TOWN OF DISCOVERY BAY

    DISCOVERY BAY · PWSID CA0710009

    Serves 17k people

    Serves your county
  9. PLEASANTIMES MUTUAL WATER CO

    BETHEL ISLAND · PWSID CA0707576

    Serves 644 people

    Serves your county
  10. CLAYTON PALMS WATER

    CLAYTON · PWSID CA0707603

    Serves 549 people

    Serves your county
  11. WILLOW MOBILE HOME PARK

    MARTINEZ · PWSID CA0707613

    Serves 481 people

    Serves your county
  12. WILLOW PARK MARINA

    OAKLEY · PWSID CA0707507

    Serves 380 people

    Serves your county
  13. ORWOOD RESORT

    BRENTWOOD · PWSID CA0707545

    Serves 350 people

    Serves your county
  14. DELTA MUTUAL WATER COMPANY

    OAKLEY · PWSID CA0707573

    Serves 333 people

    Serves your county
  15. RIVERVIEW WATER ASSOCIATION

    BETHEL ISLAND · PWSID CA0707577

    Serves 230 people

    Serves your county
  16. CAMINO MOBILEHOME

    OAKLEY · PWSID CA0707598

    Serves 210 people

    Serves your county
  17. BETHEL ISLAND ESTATES

    SACRAMENTO · PWSID CA0707523

    Serves 200 people

    Serves your county
  18. BETHEL ISLAND MHC

    STOCKTON · PWSID CA0707575

    Serves 185 people

    Serves your county
  19. OAKLEY MUTUAL WATER COMPANY

    OAKLEY · PWSID CA0706004

    Serves 170 people

    Serves your county
  20. BIG OAK MOBILE HOME PARK WATER

    OAKLEY · PWSID CA0707588

    Serves 156 people

    Serves your county
  21. FARRAR PARK PROPERTY OWNERS

    BETHEL ISLAND RD · PWSID CA0706005

    Serves 140 people

    Serves your county
  22. CAMPERS INN - RV & GOLF COURSE

    ALAMO · PWSID CA5700554

    Serves 140 people

    Billing address at this ZIP
  23. RIVERVIEW MOBILE HOME PARK

    SACRAMENTO · PWSID CA0707553

    Serves 126 people

    Serves your county
  24. BETHEL ISLAND MUTUAL WATER CO

    BETHEL ISLAND · PWSID CA0707572

    Serves 123 people

    Serves your county
  25. RUSSOS MOBILE PARK

    BETHEL ISLAND · PWSID CA0707601

    Serves 110 people

    Serves your county
  26. SANDMOUND MUTUAL

    BETHEL ISLAND · PWSID CA0707556

    Serves 100 people

    Serves your county
  27. ANGLERS SUBDIVISION 4

    BETHEL ISLAND · PWSID CA0707569

    Serves 99 people

    Serves your county
  28. BELLA VISTA WATER SYS

    MORAGA · PWSID CA0707589

    Serves 93 people

    Serves your county
  29. MARINA MOBILE MANOR

    FREMONT · PWSID CA0707608

    Serves 75 people

    Serves your county
  30. KNIGHTSEN COMMUNITY WATER SYSTEM

    OAKLEY · PWSID CA0707547

    Serves 73 people

    Serves your county
  31. SANDY POINT MOBILE HOME PARK

    BRENTWOOD · PWSID CA0707597

    Serves 67 people

    Serves your county
  32. DOUBLETREE RANCH WATER SYSTEM

    LIVERMORE · PWSID CA0707615

    Serves 66 people

    Serves your county
  33. MORAGA HEIGHTS MUTUAL WATER

    CANYON · PWSID CA0707585

    Serves 66 people

    Serves your county
  34. ANGLER S RANCH #3

    BETHEL ISLAND · PWSID CA0707501

    Serves 60 people

    Serves your county
  35. DUTCH SLOUGH WATER WORKS

    OAKLEY · PWSID CA0707519

    Serves 49 people

    Serves your county
  36. CASA MEDANOS WATER SYSTEM

    WALNUT CREEK · PWSID CA0707594

    Serves 45 people

    Serves your county
  37. COLONIA SANTA MARIA

    BRENTWOOD · PWSID CA0707517

    Serves 32 people

    Serves your county
  38. WILCOX STATION RANCH

    CANYON · PWSID CA0707623

    Serves 31 people

    Serves your county
  39. RANDALL-BOLD WATER TREATMENT PLANT

    CONCORD · PWSID CA0710010

    Serves 1 people

    Serves your county
  40. CCWD/BRENTWOOD WTP

    CONCORD · PWSID CA0710011

    Serves 0 people

    Serves your county

More for CA

How we matched ZIP 94507: we translate the ZIP to a city and county via the Geonames postal database, then match against service-area cities and counties EPA has on file for each public water system. EPA does not publish authoritative service-area boundary maps for most systems, so there is still some guesswork; large regional authorities (e.g., county-wide water and sewer authorities) are usually filed at the county level even when they serve specific cities. Your water bill names the authoritative utility. Methodology.