What a well water test costs at the Oklahoma DEQ lab
The DEQ State Environmental Laboratory's private well annual test costs $75.00 from July 1, 2026 through June 30, 2027 (DEQ lab fee schedule FY27).
DEQ lab test prices, FY27
| Test list | What it includes | Base fee |
|---|---|---|
| Private well annual | Total coliforms and E. coli, nitrate/nitrite, pH, conductivity | $75.00 |
| Private well diagnostics | The annual list plus calcium, copper, iron, manganese, sodium, hardness | $175.00 |
| Daycare / real estate | Total coliforms and E. coli, nitrate, nitrite, lead | $104.00 |
| Garber-Wellington | Arsenic, chromium, selenium, uranium | $64.00 |
| Screening for drinking water | Antimony, arsenic, barium, beryllium, cadmium, chromium, copper, lead, thallium, uranium, selenium | $115.00 |
Source: DEQ State Environmental Laboratory fee schedule, FY27 (SELSD-SD-008-R4). DEQ adds a 2.25% merchant fee plus a $2.00 portal fee when you pay by credit or debit card (DEQ laboratory services fees page).
How much is a bacteria test on well water in Oklahoma?
The private well annual list, which includes total coliform and E. coli, is $75.00 at the DEQ lab for FY27 (July 1, 2026 to June 30, 2027) (DEQ lab fee schedule FY27).
Which test do I need when buying a home with a well?
DEQ's daycare and real estate list, at $104.00 for FY27, covers bacteria, nitrate, nitrite and lead (DEQ lab fee schedule FY27). Ask your lender which tests it accepts.
Why is there a Garber-Wellington test?
DEQ sells a $64.00 FY27 panel named for the Garber-Wellington aquifer that tests arsenic, chromium, selenium and uranium (DEQ lab fee schedule FY27). If your driller says your well is in that aquifer, it is worth asking about.
Other labs
You can also use a DEQ-accredited private lab. Find one with the DEQ accredited laboratory search. More on how often to test is on our testing page.
Related: check a driller · DEQ lab test prices · plugging an old well · permits and setbacks · costs