skip to the main content area of this page
Missoula Valley Water Quality District
(406) 258-4890
Missoula County Seal and image of areas around the City.

Missoula Valley Water Quality District

Department: Water Quality District
Missoula County Home


Water Quality District - Wells

Should I Test My Water?

Yes. We recommend that all well owners periodically test their drinking water.

What should I test for?

Depending on the location of your well, there are several contaminants that you should consider testing for. All drinking water wells should be tested periodically for:

Drinking water in older homes should be tested at least once at the indoor tap for:

Testing for other contaminants may be appropriate in locations where there are potential sources of concern or evidence of historic contamination:

Contact the Water Quality District for recommendations for your specific location. Contact Us

Water Testing

Household wells should be tested periodically as mentioned above.  Have a competent laboratory test your water annually for total and fecal coliform bacteria (from human and animal wastes), nitrate, arsenic, total dissolved solids, and pH levels.  The Missoula City-County Health Department Lab can test your water for bacteria. If you suspect other contaminants are present, tests for these should also be done.  Some chemical tests are expensive, so you will want to reduce the list by identifying potential contaminants specific to your situation.

Free arsenic tests available for Missoula County residents.  Pick up a test kit at 301 W. Alder St. on the 2nd floor.

Water Testing Resources

Private Wells

You can have your water tested for bacteria at the Missoula City-County Health Department. Click here for more information on our lab services.


Get Adobe Reader Please note some documents are in "Portable Document Format" and requires Adobe Acrobat Reader to view.   If you do not have this viewer, visit

Missoula City-County Health Department Logo

Site Navigation

Health Divisions

More Information

Facebook Logo MCCHD on Facebook

Twitter Logo MCCHD on Twitter

Search Health Sites