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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 8:00 am to 4:00 pm
- All other samples
- Monday – Thursday 8:00 am to 4:00 pm;
- Friday 8:00 am to 12:00 Noon
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