Verified license

A-1 Rotary & Pump Service

Warsaw, MO · Benton CountyWell drilling and pump installation

Call (660) 438-2416
Directions
License status
Active
checked September 30, 2026
License number
003596
Missouri record
Services
6
Geothermal and more
Counties served
8
on the state record

About A-1 Rotary & Pump Service

A-1 Rotary & Pump Service is a well drilling and pump installation contractor based in Warsaw, MO (Benton County). The Missouri licensing program lists license 003596 as active, and we last checked the record on September 30, 2026.

The state record covers geothermal, pump installation, pump repair, well abandonment, well drilling and well repair. It lists 8 counties where the business works, including Pettis County, Benton County and Morgan County.

This profile is built from public state license records checked on September 30, 2026. Well Water Insider does not rate or endorse contractors. Own this business? Claim the profile to add photos, hours and a description.

License record

Verified against state records
License number
003596
License type
Well drilling and pump installation
Status
Active
Last verified
September 30, 2026

Check this license yourself on the official Missouri lookup.

What the state record says

Missouri permitted well installation and pump installation contractor (Missouri Geological Survey permit 003596, held by Oral G Nichols: water well, pump installation; restricted heat pump well; active on the WIMS permit search). Missouri permits the individual under the Water Well Drillers' Act (RSMo 256.600 to 256.640) and the 10 CSR 23 well construction rules; a water well permit covers constructing, reconstructing and plugging water wells, and a pump installer permit covers installing and repairing pumps. A restricted permit limits the holder to specified work. Primary responsible party on the business record: Oral Nichols. Filed 297 water well certification reports with the Missouri Geological Survey since 2016 (297 of them domestic wells), most recently in November 2023, mostly in Pettis, Benton and Morgan counties; the median depth of those wells is 290 feet.

Services

What the Missouri record says A-1 Rotary & Pump Service is licensed or registered to do.

Geothermal

Drilling closed-loop boreholes for ground-source heat pumps.

Pump Installation

Setting a new submersible or jet pump with the pressure tank, switch and controls.

Pump Repair

Tracking down low pressure, short cycling or no water, then repairing or replacing parts of the pump system.

Well Abandonment

Sealing an unused well to state standards so it cannot carry surface water down into the aquifer.

Well Drilling

Drilling a new private well, setting the casing and grouting it the way state rules require.

Well Repair

Fixing casings, caps, pitless adapters and other parts of an existing well.

Service area

Based in Benton County, Missouri. The state record lists 8 counties.

Approximate location (Benton County)Counties on the state record

  • Pettis County
  • Benton County
  • Morgan County
  • Henry County
  • St. Clair County
  • Hickory County
  • Saline County
  • Moniteau County

Well water in Benton County

Useful context before you call a contractor here.

56%of households in Benton County drink from a private well (est.)
210 to 350 feet; the median of 2,185 domestic wells certified to the Missouri Geological Survey since 2000 is 270 feettypical private well depth
Not statewidewater test when a home with a well is sold: no statewide rule in Missouri
Open the Benton County well guide

Typical costs for these services

National ranges to help you read a quote. They are not prices from A-1 Rotary & Pump Service; ask for a written estimate.

Submersible pump replacement$1,000 to $2,500installed; deep wells cost more
Pressure tank replacement$800 to $1,500installed
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

National 2026 ranges. Sources, checked September 2026: HomeGuide cost guides, Angi.

Before you hire

  1. 1

    Confirm the license

    Look up license 003596 on the Missouri state lookup and make sure it is active for the work you need. Open the Missouri lookup.

  2. 2

    Get a written estimate

    Ask for the scope, parts, depth or pump size, permit fees and warranty in writing. Compare two or three quotes for big jobs.

  3. 3

    Ask about permits and the well log

    New wells and many repairs are reported to the state. Ask who files the paperwork and for a copy of the well log.

  4. 4

    Test the water after the work

    Any work on a well can disturb bacteria. Test for coliform bacteria once the job is done.

Questions about A-1 Rotary & Pump Service

Is A-1 Rotary & Pump Service licensed?

Yes. The Missouri record shows license 003596 (well drilling and pump installation) with the status "active", last checked on September 30, 2026. You can confirm it on the state lookup.

What services does A-1 Rotary & Pump Service offer?

The state record lists geothermal, pump installation, pump repair, well abandonment, well drilling and well repair. Call to confirm they take on your type of job.

What areas does A-1 Rotary & Pump Service serve?

The business is based in Benton County (Warsaw, MO). The state record lists 8 counties, including Pettis County, Benton County, Morgan County, Henry County and St. Clair County.

How do I contact A-1 Rotary & Pump Service?

Call (660) 438-2416. The address on the state record is 21203 Allen Rd, Warsaw, MO 65355.

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