WHAT IS A SITE EVALUATION?
A well site evaluation is an inspection and written determination by the health district that states whether a selected site is
suitable for the construction of a new well, or whether an existing well is in a suitable site to serve as a source of drinking
water. During a well site evaluation, the land surrounding the proposed new well site is assessed for potential sources of
contamination. For evaluations where the well already exists, the well's visible construction is also assessed for potential
WHEN IS A WELL SITE EVALUATION REQUIRED?
WAC 246-290 and WAC 246-291 require that a well site evaluation be performed by authorized personnel as part of source
approval for any new or previously unapproved source serving a public water system. WAC 246-290 also requires a well site
evaluation as part of the approval of a well that serves as the water source for a bottled water plant or ice plant.
WHEN MIGHT AN INDIVIDUAL WATER SYSTEM OWNER REQUEST A WELL SITE EVALUATION?
Usually, people request site evaluations for loan certification purposes or for evaluation of and assistance with some problem
that they are experiencing with their home's individual water system. NOTE: a well site evaluation is only appropriate for
loan certification on properties that do not already have an existing well and/or the intent is to drill a new well. For properties
where the well and water system is already in place, the applicant should request a Sanitary Survey instead.
IS A SATISFACTORY WELL SITE EVALUATION THE SAME AS A SOURCE APPROVAL?
No. The well site evaluation is only one of the items required for approval of a well to serve a public water system or bottled
DOES APPROVAL BY NETCHD FOR A GROUP B WATER SYSTEM GIVE ME LEGAL RIGHT TO THE WATER?
No. Legal availability of water is determined by the County in which the system is installed or by Washington State Department of Ecology.