Water testing in Grays Harbor County, WA

Lowest listed local program price: $37, other prices posted, Grays Harbor County Public Services Department, Environmental Health Division.

Well water

Grays Harbor County Water Lab Well Testing

$37, other prices posted

Bacteria
E. coli
Fecal coliform
Nitrate

Pick up a sample bottle from the receptionist at the County Administration Building in Montesano and drop off the sample within the posted time windows.

Official page

All posted prices

Each drinking water sample has a fee of $37 and each nitrate sample has a fee of $47

Who can use it: Grays Harbor County, Washington

Grays Harbor County Administration Building Water Lab, 100 W Broadway, Montesano · (360) 249-5579

Checked October 1, 2026. Report a change

See statewide tests and certified-lab lists for Washington.

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