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2022 Well Sampling Sign-up

Ag Order 4.0 requires that the Primary Irrigation Well for each enrolled ranch be sampled between March 1 and May 31 of 2022.  The Ag Order also requires that every Domestic Well located on an enrolled ranch be sampled during this time.  After completing the registration form below, the individual(s) you designate will be contacted by one of our samplers to confirm timing, access, and other details.  Upon successful sample collection, you will need to make a payment as follows:

Primary Irrigation Wells – $160 per well
On-Farm Domestic Wells – $225 per well
Optional Irrigation Suitability – $55* per irrigation well (only if requested by grower)

*If desired by the grower, field sample collectors will submit sufficient bottles to the laboratory to support a full “Irrigation Suitability” analysis. The cost is an additional $55 in Monterey, Santa Cruz, Santa Clara, San Benito, and San Mateo counties. The following additional analysis will be included: Alkalinity, Bicarbonate, Boron, Calcium, Carbonate, Chloride, Conductivity, Hardness, Iron, Magnesium, Manganese, Nitrate, pH, Potassium, SAR (Sodium Absorption Ratio) & Adjusted SAR, Sodium, Sulfate, TDS (Total Dissolved Solids). For SLO and Santa Barbara counties, please contact Fruit Growers Laboratory for pricing.

Prices include the following, each of which is mandated by Ag Order 4.0:

  • In-field parameter measurement and stabilization (pH, conductivity, temperature)
  • Sample collection by a qualified technician
  • Chain-of-custody form completion and cold sample delivery to a certified laboratory
  • Laboratory analysis of Total Dissolved Solids and Nitrate (Irrigation Wells & Domestic Wells)
  • Laboratory analysis of 1,2,3-Trichloropropane (Domestic Wells only)
  • Lab-direct reporting to GeoTracker

Please complete the web-form below for each Ranch (AGL) that you wish to schedule for well sampling.  If you have a large number of individual Ranches to schedule and prefer to submit a spreadsheet instead, you may download this Excel template and email back to  (Use of the Excel template is OPTIONAL.)

Groundwater Sampling Sign-Up Form

* Complete one form for each Ranch

Coordinator Information
Can be anyone you want to designate for this task; it does not have to match your contact info in GeoTracker

Will this be the same person listed as the Coordinator above?

Only if known

if not daily
if not daily

Designated Primary Irrigation Well

use existing Well ID if known; otherwise, assign a name
only if known

Example – if a well is not getting turned on until June, or other extenuating circumstances.

Contact Info

  • PO Box 2227
    Watsonville, CA 95077
  • 831-761-8644 (phone)
  • 831-761-8695 (fax)
For a full list of contacts please
visit our contact page.

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