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FAQs

FAQs - Wells, Plumbing

What does Thurston County need to know about my water source?

Washington state law requires the Permit Assistance Center to obtain an assurance that permit-applicants have an adequate supply of drinking water available for their projects. Applicants provide this assurance by filling out a "Certificate of Water Availability Form."

I need to build a new well.  How do I go about doing this?

You will need to need to have Thurston County approve of your well site by submitting a Well Site Supplemental Application (SA 020). Click here for the application and a description of the process.

What must I do to connect to an existing well?

You will need to need to have Thurston County approve of existing well by submitting a Well Site Supplemental Application (SA 020). Click here for the application and a description of the process.

What other things might I be asked to provide?

  • Completed Certificate of Water Availability.
  •  Well site approval - Drawings of your well site must be included on your site plan and are approved during the site-plan review process. (This is required if your well is to serve as the source for a Group B or 2-party public water system. Click here for an explanation - SA 020.)
  • Well driller’s report - This report, also commonly called a “well log,” provides details about how your well is constructed.
  •  Water right permit (if required) - This permit is required if you will be drawing from a surface-water source. It also may be required if you will use the water for irrigation purposes.
  • Access easement (if required) - An easement is required if you must cross public right of way or another person’s property to access your well, or if your well is on another person’s property. To get an easement application for crossing a Thurston County right-of-way, click here (SA 015B).
  • Isolation covenant (two-party well only) - This form gives property owners the legal ability to control activities within 100 feet of their well that could affect their water quality. Click here for covenant forms.
  • Quantity test (pump test, air test, bailer test) - Your quantity test must demonstrate a minimum 400-gallon-per-day flow for single-family wells and a minimum 800-gallon-per-day flow for two-party wells.
  • Satisfactory bacteria and nitrate tests -These water quality tests ensure that your water meets drinking-water standards. If your building site is in a known or suspected contamination area, additional water quality tests may be required. To request that an Environmental Health Officer perform a well sample, click here for a "Certified Water Sample" application.
  • Assurance that no contamination source within 100 feet of the well

Contact Us

Thurston County Permit Assistance Center, 2000 Lakeridge Drive SW, Olympia, WA 98502-6045.
Phone: (360) 786-5490. TDD line: (360) 754-2933.  E-mail: permit@co.thurston.wa.us.

 

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