Oregon county well guide

Well Water in Baker County, OR: Testing, Contractors and Rules

About 1,733 households in Baker County, 27% of the county, rely on a private well. Nobody tests that water unless the owner does.

Labs within 40 milesLicensed contractors
27%of households on a private well
Share on wells, county vs state
Baker County27%
Oregon average16%
11licensed contractors serve the county
40+ mito a certified lab; mail-in kits recommended
Yesstatewide test required when a home is sold

About one in 4 households in Baker County relies on a private well, around 1,733 homes. Outside the towns with public water, wells are the norm here.

Local rules for wells in Baker County

The rules that apply in Baker County are set at the state level in Oregon. The state does not require a test on a new well, and a test is required at sale. Some counties and townships add permits or setbacks of their own, so check locally before drilling. The state's own recommendations are below.

At a glance

Water test for a new wellNot required statewide

No statewide water test on a new well. The well must be built by an OWRD-licensed, bonded water supply well constructor (or by the landowner under a Landowner's Water Well Permit) to the OAR 690-210 standards, with a start card filed and the fee paid before drilling, a metal well ID tag attached, and a well report filed with OWRD within 30 days. Setbacks are 50 ft from a septic tank and 100 ft from a drainfield. Some counties ask for a bacteria test before a building permit is finaled, and lenders usually do.

Water test when a home is soldRequired

Yes. Oregon's Domestic Well Testing Act (ORS 448.271, OAR 333-061-0305 to 0335) requires the seller of a property with a domestic well to have the water tested by an ORELAP-accredited lab for arsenic, nitrate and total coliform bacteria, give the results to the buyer and report them to the Oregon Health Authority within 90 days of the sale. It is one of only a handful of state laws in the country that test private wells at transfer.

What the state recommends

The Oregon Health Authority recommends testing a domestic well every year for coliform bacteria and nitrate, and every three to five years for arsenic (found across the Willamette Valley, the Tualatin basin, Lane County and Klamath and Lake counties), plus pH, hardness, iron, manganese, lead and copper once. Add uranium and radon in Lane County and the Cascade foothills, and test again after flooding, well work or a change in taste, color or smell. In the Southern Willamette Valley and Lower Umatilla Basin Groundwater Management Areas, nitrate is the test that matters most.

Free or low-cost testingAvailable

No statewide free program. The OSU Extension Well Water Program runs free nitrate screening clinics around the state and publishes testing guidance, and Oregon Health Authority's Domestic Well Safety Program (971-673-0440) helps owners read results. The Lower Umatilla Basin (Morrow and Umatilla counties) has state-funded free nitrate testing and water delivery for affected wells. Otherwise the ORELAP labs below charge $30 to $60 for bacteria and nitrate and $150 to $250 for the real estate panel.

Getting your water tested near Baker County

Baker County has no certified lab within 40 miles, so most owners here test by mail. Order bottles from a certified lab, sample from the cold tap before any treatment, and ship the same day with an ice pack.

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Licensed well contractors serving Baker County

Licensed help in Baker County includes Ben’s Well Drilling & Repair LLC and Cascade Drilling LP and 9 others. Every listing was matched to the Oregon license list; the "verify" link on each profile opens the state lookup.

Well depth and water chemistry

Well depth and water chemistry in Baker County follow the rock underneath it. Typical wells here run 130 to 260 feet; the median of 854 new domestic wells reported to OWRD since 2000 is 180 feet. Contaminants worth testing for in this part of Oregon include arsenic (naturally occurring across the willamette valley, the tualatin basin, lane county, the klamath and lake basins and parts of central oregon).

Typical well depth

130 to 260 feet; the median of 854 new domestic wells reported to OWRD since 2000 is 180 feet

Contaminants to test for
  • Arsenic (naturally occurring across the Willamette Valley
  • The Tualatin basin
  • Lane County
  • The Klamath and Lake basins and parts of central Oregon)
  • Nitrate (Southern Willamette Valley
  • Lower Umatilla Basin and Northern Malheur groundwater management areas
  • And shallow wells in farm country)
  • Coliform bacteria (statewide
  • Worst in shallow and older wells)
  • Iron and manganese (valley alluvium and coastal sands)
  • Hardness (basalt and limestone areas)
  • Uranium and radon (Lane County granite and Cascade foothills)
  • Hydrogen sulfide (deep basalt wells)
  • Sodium and boron (some Willamette Valley aquifers)
  • PFAS near airfields and industrial sites

Neighboring counties: Union County, Wallowa County, Malheur County, Grant County.

What well work costs in Baker County

Bacteria test (coliform and E. coli)$20 to $40published Oregon lab fees
Nitrate test$20 to $40published Oregon lab fees
Broad panel (metals and minerals)$85 to $450state and university lab packages
Well inspection$250 to $550$350 to $900 with water testing
Submersible pump replacement$1,000 to $2,500installed; deep wells cost more
Pressure tank replacement$800 to $1,500installed
One treatment unit$700 to $3,500softener, iron filter or UV, installed
Multi-stage whole-house treatment$2,500 to $10,000+several units or whole-house RO, installed
New well, complete$6,000 to $16,000typical 200 ft well with pump; drilling alone about $20 to $30 per foot; deeper wells cost more
Shock chlorination$80 to $200by a contractor; under $30 to do yourself

Oregon Health Authority estimates; arsenic runs $25 to $45. Installed costs are national 2026 ranges; local quotes vary with depth, access and materials. Sources, checked September 2026: Oregon Health Authority testing recommendations, HomeGuide cost guides, Angi: cost to shock a well.

Questions Baker County well owners ask

How many homes in Baker County are on a well?

About 1,733, or 27% of households, based on Census housing data and state well surveys. The share is highest outside the towns with public water.

Where is the closest certified lab to Baker County?

There is no certified lab within 40 miles. Use a mail-in kit from a Oregon certified lab, or the county health department if it collects samples.

Do I need a permit to drill a well in Baker County?

No statewide water test on a new well. The well must be built by an OWRD-licensed, bonded water supply well constructor (or by the landowner under a Landowner's Water Well Permit) to the OAR 690-210 standards, with a start card filed and the fee paid before drilling, a metal well ID tag attached, and a well report filed with OWRD within 30 days. Setbacks are 50 ft from a septic tank and 100 ft from a drainfield. Some counties ask for a bacteria test before a building permit is finaled, and lenders usually do.

What does a well test cost near Baker County?

Published lab fees in Oregon: $20 to $40 for a bacteria test and $20 to $40 for nitrate. Oregon Health Authority estimates; arsenic runs $25 to $45. Mail-in kits cost about the same as walking in.