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ZIP 93475

Water quality in Oceano, CA (93475)

Drinking water in ZIP 93475 (Oceano, San Luis Obispo County) comes from 50 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: 268,104 people.

Public water systems serving ZIP 93475

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 Oceano; "Serves your county" means the utility serves San Luis Obispo 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. SAN LUIS OBISPO WATER DEPARTMENT

    SAN LUIS OBISPO · PWSID CA4010009

    Serves 48k people

    Serves your county
  2. CITY OF PASO ROBLES WATER DIVISION

    PASO ROBLES · PWSID CA4010007

    Serves 31k people

    Serves your county
  3. ATASCADERO MUTUAL WATER CO

    ATASCADERO · PWSID CA4010002

    Serves 31k people

    Serves your county
  4. CITY OF ARROYO GRANDE UTILITIES DIVISION

    ARROYO GRANDE · PWSID CA4010001

    Serves 18k people

    Serves your county
  5. CALIFORNIA MENS COLONY

    SAN LUIS OBISPO · PWSID CA4010830

    Serves 15k people

    Serves your county
  6. NIPOMO COMM SERVICES DIST

    NIPOMO · PWSID CA4010026

    Serves 14k people

    Serves your county
  7. MORRO BAY PW DEPT - WATER DIVISION

    MORRO BAY · PWSID CA4010011

    Serves 14k people

    Serves your county
  8. CITY OF GROVER BEACH PUBLIC WORKS DEPT

    GROVER BEACH · PWSID CA4010004

    Serves 13k people

    Serves your county
  9. PISMO BEACH WATER DEPARTMENT

    PISMO BEACH · PWSID CA4010008

    Serves 8,036 people

    Serves your county
  10. TEMPLETON CSD

    TEMPLETON · PWSID CA4010019

    Serves 8,011 people

    Serves your county
  11. OCEANO COMM SERVICES DIST.

    OCEANO · PWSID CA4010005

    Serves 7,601 people

    Serves your county
  12. LOS OSOS COMMUNITY SERVICES DISTRICT

    LOS OSOS · PWSID CA4010016

    Serves 7,086 people

    Serves your county
  13. GOLDEN STATE WATER COMPANY - LOS OSOS

    HAWTHORNE · PWSID CA4010017

    Serves 5,924 people

    Serves your county
  14. CAMBRIA COMM SERVICES DIST

    CAMBRIA · PWSID CA4010014

    Serves 5,532 people

    Serves your county
  15. GOLDEN STATE WATER COMPANY - NIPOMO

    RANCHO CORDOVA · PWSID CA4010018

    Serves 4,506 people

    Serves your county
  16. ATASCADERO STATE HOSPITAL

    ATASCADERO · PWSID CA4010832

    Serves 4,100 people

    Serves your county
  17. WOODLANDS DEVELOPMENT

    ARROYO GRANDE · PWSID CA4010081

    Serves 3,862 people

    Serves your county
  18. HERITAGE RANCH CSD

    PASO ROBLES · PWSID CA4010012

    Serves 2,956 people

    Serves your county
  19. SAN MIGUEL COMMUNITY SERVICES DISTRICT

    SAN MIGUEL · PWSID CA4010010

    Serves 2,600 people

    Serves your county
  20. CAYUCOS BEACH MUTUAL WATER COMPANY

    CAYUCOS · PWSID CA4010006

    Serves 2,567 people

    Serves your county
  21. MORRO ROCK MUTUAL WATER CO

    CAYUCOS · PWSID CA4010015

    Serves 2,181 people

    Serves your county
  22. NACIMIENTO WATER COMPANY

    BRADLEY · PWSID CA4010027

    Serves 2,181 people

    Serves your county
  23. GOLDEN STATE WATER COMPANY-CYPRESS RIDGE

    RANCHO CORDOVA · PWSID CA4010040

    Serves 2,026 people

    Serves your county
  24. AVILA BEACH COMMUNITY SERVICES DISTRICT

    AVILA BEACH · PWSID CA4000222

    Serves 1,630 people

    Serves your county
  25. SAN MIGUELITO MWC

    AVILA BEACH · PWSID CA4010003

    Serves 1,600 people

    Serves your county
  26. LOPEZ PROJECT

    SAN LUIS OBISPO · PWSID CA4010022

    Serves 1,569 people

    Serves your county
  27. GOLDEN STATE WATER COMPANY - EDNA

    HAWTHORNE · PWSID CA4010023

    Serves 1,493 people

    Serves your county
  28. SLO CWWD NO. 23 - SANTA MARGARITA

    SAN LUIS OBISPO · PWSID CA4010024

    Serves 1,291 people

    Serves your county
  29. SLOCSA #10A - CAYUCOS

    SAN LUIS OBISPO · PWSID CA4010901

    Serves 1,200 people

    Serves your county
  30. SLO CSA NO. 16 - SHANDON

    SAN LUIS OBISPO · PWSID CA4010028

    Serves 1,085 people

    Serves your county
  31. LAUREATE WATER COMPANY

    SAN LUIS OBISPO · PWSID CA4000206

    Serves 700 people

    Serves your county
  32. MESA DUNES MOBILE HOME ESTATES

    ARROYO GRANDE · PWSID CA4000650

    Serves 600 people

    Serves your county
  33. S & T MUTUAL WATER COMPANY

    LOS OSOS · PWSID CA4000523

    Serves 591 people

    Serves your county
  34. WOODLAND PARK MUTUAL WATER CO

    ARROYO GRANDE · PWSID CA4000506

    Serves 538 people

    Serves your county
  35. WALNUT HILLS MUTUAL WATER CO

    PASO ROBLES · PWSID CA4000670

    Serves 486 people

    Serves your county
  36. SAN SIMEON CSD

    SAN SIMEON · PWSID CA4000568

    Serves 462 people

    Serves your county
  37. GARDEN FARMS C.W.D.

    ATASCADERO · PWSID CA4000507

    Serves 440 people

    Serves your county
  38. LOS ROBLES MOBILE HOME ESTATES

    PASO ROBLES · PWSID CA4000649

    Serves 420 people

    Serves your county
  39. GREEN RIVER MUTUAL WATER CO.

    PASO ROBLES · PWSID CA4000554

    Serves 350 people

    Serves your county
  40. SANTA YSABEL RANCH MWC

    SAN LUIS OBISPO · PWSID CA4000802

    Serves 344 people

    Serves your county
  41. RANCHO COLINA MOBILE HOME PARK

    MORRO BAY · PWSID CA4000653

    Serves 249 people

    Serves your county
  42. GRAN CIELO MUTUAL WATER COMPANY

    SAN LUIS OBISPO · PWSID CA4000853

    Serves 139 people

    Serves your county
  43. IRISH HILLS MUTUAL WATER CO

    SAN LUIS OBISPO · PWSID CA4000203

    Serves 135 people

    Serves your county
  44. CANYON CREST MUTUAL BENEFIT WC

    ARROYO GRANDE · PWSID CA4000230

    Serves 133 people

    Serves your county
  45. EDNA VALLEY RANCH EAST

    ARROYO GRANDE · PWSID CA4000202

    Serves 132 people

    Serves your county
  46. CALLENDER GROVE MUTUAL WATER

    SAN LUIS OBISPO · PWSID CA4000805

    Serves 126 people

    Serves your county
  47. SPANISH LAKES MUTUAL WATER CO

    TEMPLETON · PWSID CA4000789

    Serves 125 people

    Serves your county
  48. HALCYON WATER SYSTEM

    HALCYON · PWSID CA4000501

    Serves 110 people

    Serves your county
  49. LAS VENTANAS RANCH

    SAN LUIS OBISPO · PWSID CA4000815

    Serves 108 people

    Serves your county
  50. VARIAN RANCH MUTUAL WATER

    ARROYO GRANDE · PWSID CA4000765

    Serves 105 people

    Serves your county

More for CA

How we matched ZIP 93475: 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.