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291 North Main Street
Fax (559) 781-6437
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Public Works

City of Porterville Laboratory

1265 W. Grand Avenue, Porterville     Phone 559-782-7510

Certified by State Water Resources Control Board Environmental Laboratory Accreditation Program (ELAP) Certificate #1653.

The City of Porterville Laboratory provides analytical services to various City departments and surrounding communities for drinking water, wastewater, and industrial wastewater testing.

Analytical Services:

  • Bacteriological testing:

Total coliform and E-coli in drinking water.

Total coliform, fecal coliform,       E-coli in source water.

  • Nitrate/Nitrite testing
  • General Minerals
  • Trace Metals
  • Volatile Organic Compounds (VOC)

Laboratory Hours for receiving samples:

Bacteriological Samples

     Monday – Thursday 7:30 to 4:00 pm

All other samples

     Monday – Thursday 7:30 to 4:00;

     Friday 8:00 to 12:00 Noon


ELAP Certificate

List of Accredited Fields of Testing

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