Grays Harbor County



Office Hours:
8:00 am - Noon,
1:00 pm - 4:30 pm

Environmental Health E-Mail

Environmental Health Jeff Nelson, R.S. Director
100 W Broadway, Suite 31
Montesano, WA 98563-3614
(360) 249-4222
(360) 249-3203 Fax

Safety and quality of drinkable water.

Eric Khambatta, R.S.
Environmental Health Specialist III
Water Lab Manager



Montesano Location

Sample bottles may be obtained and paid for from the reception desk at the Grays Harbor County Public Services Department located on the 3rd floor of the County Administration Building in Montesano, 100 W Broadway; 8:00am-4:30pm M-F, Closed daily from 12-1pm.
Drinking Water Sample Drop off times:
Mon 8:00 am – 4:30 pm
Tue 8:00 am – 4:30 pm
Wed 8:00 am – 4:30 pm
Thur 8:00 am – 3:00 pm
Nitrate Testing Samples Accepted:
Mon 8:00am – 4:30pm
Tue 8:00am – 4:30pm
Wed 8:00am – 12:00pm



Aberdeen Location

If you have an account, water sample bottles can also be obtained from the Grays Harbor County Public Health and Social Services Department located at 2109 Sumner Ave., in Aberdeen between 8am-4:30pm; closed 12-12:30pm M-F. All Aberdeen drop off location samples must be collected & submitted on the same day.
Samples can no longer be paid for in Aberdeen, so unless you have an account or the sample has been paid for with a receipt validation on the lab slip, the sample will be denied.
Drop off times:
ONLY Tuesday before 3:00 p.m.
(Note: they will be closed from 12 – 12:30p.m. daily)



Water Sample Submittal Instructions

Each drinking water or nitrate sample has a fee of $23, which must be paid for at the Montesano location prior to analysis, unless an account has been set up for billing.
Please read and follow the instructions located on the back of the water lab form. Improper handling could invalidate your sample.
Drinking water samples CANNOT be tested if they are over 30 hours old. Environmental samples must be tested within 8 hours of collection. Call for Environmental sample pricing.
Samples can ONLY be accepted in the bottles provided by the Environmental Health Division since they contain the chemicals necessary for testing. All other containers will be refused for testing.
Call or check website for holiday schedule or emergency testing:



Water Lab Closures

Grays Harbor County Drinking Water Laboratory we will be closed and not accepting any samples on the following dates:
    July 1st, 2015 - Jan 1st, 2016 Closures
  July 2, 2015
  September 7, 2015
  November 10-11, 2015
  November 25-26, 2015
  December 23-24, 2015
  December 31, 2015
Samples will not be accepted on the dates indicated above.

We apologize for any inconvenience. If you have any questions please feel free to contact us at (360) 249-4222, or e-mail

Directions For Disinfecting contaminated wells and new wells   Water
  Water Sample Collection and Analysis Request


What are coliform bacteria?
Coliform bacteria are organisms that are present in the environment and in the feces of all warm-blooded animals and humans. Coliform bacteria will not likely cause illness. However, their presence in drinking water indicates that disease-causing organisms (pathogens) could be in the water system. Most pathogens that can contaminate water supplies come from the feces of humans or animals. Testing drinking water for all possible pathogens is complex, time-consuming, and expensive. It is relatively easy and inexpensive to test for coliform bacteria. If coliform bacteria are found in a water sample, water system operators work to find the source of contamination and restore safe drinking water. There are three different groups of coliform bacteria; each has a different level of risk.

Total coliform, fecal coliform, and E. coli
Total coliform, fecal coliform, and E. coli are all indicators of drinking water quality. The total coliform group is a large collection of different kinds of bacteria. Fecal coliforms are types of total coliform that mostly exist in feces. E. coli is a sub-group of fecal coliform. When a water sample is sent to a lab, it is tested for total coliform. If total coliform is present, the sample will also be tested for either fecal coliform or E. coli, depending on the lab testing method.

Total Coliform Fecal

Total coliform bacteria are commonly found in the environment (e.g., soil or vegetation) and are generally harmless. If only total coliform bacteria are detected in drinking water, the source is probably environmental. Fecal contamination is not likely. However, if environmental contamination can enter the system, there may also be a way for pathogens to enter the system. Therefore, it is important to find the source and resolve the problem.

Fecal coliform bacteria are a sub-group of total coliform bacteria. They appear in great quantities in the intestines and feces of people and animals. The presence of fecal coliform in a drinking water sample often indicates recent fecal contamination » meaning that there is a greater risk that pathogens are present than if only total coliform bacteria is detected.

E. coli
is a sub-group of the fecal coliform group. Most E. coli bacteria are harmless and are found in great quantities in the intestines of people and warm-blooded animals. Some strains, however, can cause illness. The presence of E. coli in a drinking water sample almost always indicates recent fecal contamination » meaning there is a greater risk that pathogens are present.

A note about E. coli: E. coli outbreaks receive much media coverage. Most outbreaks have been caused by a specific strain of E. coli bacteria known as E. coli O157:H7. When a drinking water sample is reported as "E. coli present" it does not mean that this dangerous strain is present and in fact, it is probably not present. However, it does indicate recent fecal contamination. Boiling or treating contaminated drinking water with a disinfectant destroys all forms of E. coli, including O157:H7.