Bryan Water Plant Laboratory
OH certified
Homeowner samples
- Coliform Bacteria
Ohio county well guide
Well Water in Defiance County, OH: Testing, Contractors and Rules
About 5,478 households in Defiance County, 36% of the county, rely on a private well. Nobody tests that water unless the owner does.
of households on a private well
Share on wells, county vs state
2licensed contractors serve the county
14 mito the nearest certified lab, Bryan Water Plant Laboratory
Nostatewide test required when a home is sold
About one in 3 households in Defiance County relies on a private well, around 5,478 homes. Outside the towns with public water, wells are the norm here.
Local rules for wells in Defiance County
The rules that apply in Defiance County are set at the state level in Ohio. New wells must be tested before use, and nothing 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 wellRequired
Under OAC 3701-28 a permit from the local health district is required before a well is drilled or altered. When the work is done, the owner asks the health district for the final inspection, and a sanitarian collects the water sample: total coliform, E. coli and nitrate. The system is approved only when the sample passes (4 or fewer total coliform per 100 mL and no E. coli for a well without continuous disinfection).
Water test when a home is soldNot required statewide
No statewide requirement. Most local health districts offer a real-estate evaluation of the well on request (a visual inspection plus a bacteria and nitrate sample), and some lenders ask for one. Ask the county health district for its fee and turnaround.
What the state recommends
ODH recommends a total coliform and nitrate test every year, and every time the water changes in taste, color or smell, after flooding, or after any work on the well or pump. Add arsenic, iron and manganese, hardness and sulfate at least once, and PFAS or methane where local conditions call for it.
Free or low-cost testingAvailable
No statewide free program. Several county health districts run their own labs (Erie, Logan, Mahoning, Canton City among them) and sell bacteria and nitrate tests at cost; others sell bottles from a certified lab. OSU Extension fact sheet AEX-315 lists labs that accept samples from homeowners.
Getting your water tested near Defiance County
The nearest certified lab is Bryan Water Plant Laboratory in Bryan, about 14 miles from the county center, and it accepts samples from homeowners. There are 3 more within 40 miles, listed below with what each tests for.
2 certified labs within 40 miles
Kleinfelder Water Technologies Laboratory (formerly Industrial Fluid Management, Inc.)
OH certified
- Coliform Bacteria
Licensed well contractors serving Defiance County
Licensed help in Defiance County includes Memmer’s Water Tech, Inc and Morris Heating, Air Conditioning & Plumbing. Every listing was matched to the Ohio license list; the "verify" link on each profile opens the state lookup.
2 licensed contractors
Memmer’s Water Tech, Inc.
Verified license
License 9999-PWSC-26-000056 Active
- Pump Installation
- Pump Repair
- Water Treatment
- Well Abandonment
- Well Drilling
- Well Repair
Morris Heating, Air Conditioning & Plumbing
Verified license
License 9999-PWSC-25-000107 Active
- Water Treatment
- Well Drilling
- Well Repair
Well depth and water chemistry
Well depth and water chemistry in Defiance County follow the rock underneath it. Typical wells here run 50 to 200 ft in glacial sand and gravel; 100 to 400 ft in bedrock in the east and south. Contaminants worth testing for in this part of Ohio include coliform bacteria, nitrate (northwest and central farm counties), arsenic (glacial aquifers in northwest and central ohio), iron.
Typical well depth
Varies by location. Check the state well record search for logs of nearby wells.
Contaminants to test for
- Coliform bacteria
- Nitrate (northwest and central farm counties)
- Arsenic (glacial aquifers in northwest and central Ohio)
- Iron
- Manganese
- Hardness
- Sulfate and hydrogen sulfide (eastern shale and coal country)
- Radium and uranium (some sandstone and shale wells)
- Methane (near oil and gas fields)
Neighboring counties: Paulding County, Williams County, Henry County, Putnam County.
What well work costs in Defiance County
Bacteria test (coliform and E. coli)$45 to $75published Ohio lab fees
Nitrate test$10 to $80varies by lab; ask when you order
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
County health department bacteria test: $45 if you collect, $75 if a sanitarian collects (Wayne County). Installed costs are national 2026 ranges; local quotes vary with depth, access and materials. Sources, checked September 2026: Wayne County Health Department, HomeGuide cost guides, Angi: cost to shock a well.
Questions Defiance County well owners ask
How many homes in Defiance County are on a well?
About 5,478, or 36% 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 Defiance County?
Bryan Water Plant Laboratory in Bryan, about 14 miles away. It accepts homeowner samples.
Do I need a permit to drill a well in Defiance County?
Under OAC 3701-28 a permit from the local health district is required before a well is drilled or altered. When the work is done, the owner asks the health district for the final inspection, and a sanitarian collects the water sample: total coliform, E. coli and nitrate. The system is approved only when the sample passes (4 or fewer total coliform per 100 mL and no E. coli for a well without continuous disinfection).
What does a well test cost near Defiance County?
Published lab fees in Ohio: $45 to $75 for a bacteria test. County health department bacteria test: $45 if you collect, $75 if a sanitarian collects (Wayne County). Mail-in kits cost about the same as walking in.