Water Quality Analysis

Environmental Laboratory

MPUD operates a water quality laboratory at the WWTF certified under the SWRCB Environmental Laboratory Accreditation Program (ELAP).  MPUD is able to perform most of the daily, weekly and monthly water quality monitoring for the public water and wastewater system in the MPUD lab. The operation of the laboratory provides the operations staff to more efficiently monitor water quality and operational parameters for the water and wastewater treatment systems.  


MPUD provides bacteriological and nitrate analysis of drinking water for the public.  Water sampling bottles are available at the administrative office, 4992 7th Street, Mariposa.

                                       Sample Receiving Days                          Receiving Times                Fee Schedule

Bacteria                        Monday through Thursday           8 am to noon and 1 to 2 pm            $35.00

Nitrate (as NO3-N       Monday through Thursday                    8 am to 11:30 am                     $50.00

Contact Information

Mariposa Public Utility District

4992 7th Street

P.O. Box 494

Mariposa CA 95338

Office Phone:  (209) 966-2515  Fax: (209) 966-6615

Office Hours:

Monday- Thursday: 8am-5pm Friday 8am-4pm

Closed for lunch from 12-1


Emergency Contact

water and wastewater services


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