Water Quality

Water Quality Data and Studies

M1W Recycled Water QualityThese documents and data have been provided as a informative resource for the Monterey County residents as well as for the growers participating in the Castroville Seawater Intrusion Project.

Monitoring Program

View or download a PDF showing the constituents, frequency, and locations monitored.


The following are in PDF format.

Report on Demonstration Study Conducted at the Bayonet Golf Course in Seaside, California, to Determine the Compatibility of Recycled Water for Golf Course Irrigation. April 2006. (File size: 6.4 MB)

Effects of Recycled Water on Soil Salinity Levels for Cool Season Vegetables (presented at the Fourth International Symposium on Irrigation of Horticultural Crops September 1-6, 2003, Davis, CA and published in Acta Horticulturae No. 664 in December 2004) (File size 1 MB)

Efficacy of Pathogen Removal During Full-scale Operation of Water Reuse Facilities in Monterey California (presented at the IWA 4th International Symposium on Wastewater Reclamation and Reuse November 12-14, 2003, Mexico, City) (File size: 371K)

Recycled Water Food Safety Study for Monterey County Water Recycling Projects. Prepared by the Water Quality and Operations Committee. Sponsored by Monterey County Water Resources Agency and Monterey One Water (formerly Monterey Regional Water Pollution Control Agency). August 1998. (File size 6.4 MB)

Monterey Water Reclamation Study for Agriculture, Final Report, April 1987. (This is a very large file — over 13 MB.)

Monterey County Water Recycling Projects brochure. (164 KB)

State of California 2019 Environmental Laboratory Accreditation certification and List of Accredited Fields of Testing (77 KB)

Chemical Analysis

Recycled Water Blended Water
All samples are collected at the end of the treatment process and prior to the storage pond. Recycled/River Water Mix
2002 – Present
1997 to 2001 (PDF)
2011 – Present

Administrative Offices

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7:30 a.m. to 5:00 p.m. Fridays

5 Harris Court, Bldg D
Monterey, CA 93940

(831) 372-3367
or (831) 422-1001

or email Customer Service