BackflowNear Test-Due Reminder

Backflow testing in O'Fallon, MO

99 backflow testing businesses work within 25 miles of O'Fallon, 5 of them based in town. Every one has testers on Missouri's certified backflow tester roster.

99 businesses within 25 miles
22 for-hire testers based in O'Fallon

Certified backflow testers near O'Fallon

Best Lawn Care

100/100
✓ MO Certified Backflow Tester Verified #34-11683 ★ 4.9 (979 reviews) 3 certified testers Backflow Testing

209 Josephville Rd, Wentzville, MO 63385 · 4 mi from O'Fallon

Call (636) 200-3000 Details Website

Verified Oct 2026 · Unclaimed listing

Pro Outdoor

100/100
✓ MO Certified Backflow Tester Verified #34-12921 ★ 4.7 (756 reviews) 18 certified testers Backflow Testing

304 TCW Ct, Lake St Louis, MO 63367 · 4 mi from O'Fallon

Call (636) 695-7800 Details Website

Verified Oct 2026 · Unclaimed listing

Lawn Authority

100/100
✓ MO Certified Backflow Tester Verified #34-10719 ★ 4.8 (104 reviews) 2 certified testers Backflow Testing

2709 Hopewell Rd, Wentzville, MO 63385 · 6 mi from O'Fallon

Call (636) 928-5296 Details Website

Verified Oct 2026 · Unclaimed listing

Metro Lawn Sprinklers

100/100
✓ MO Certified Backflow Tester Verified #34-9140 ★ 4.9 (851 reviews) 11 certified testers Backflow Testing

291 Indacom Dr, St Peters, MO 63376 · 7 mi from O'Fallon

Call (636) 936-8243 Details Website

Verified Oct 2026 · Unclaimed listing

Ozark Mechanical

100/100
✓ MO Certified Backflow Tester Verified #13-14144 ★ 5 (193 reviews) 2 certified testers Backflow Testing

2108 Parkway Dr, St Peters, MO 63376 · 9 mi from O'Fallon

Call (636) 317-1234 Details Website

Verified Oct 2026 · Unclaimed listing

GDS Irrigation

100/100
✓ MO Certified Backflow Tester Verified #43-8400 ★ 4.7 (50 reviews) 3 certified testers Backflow Testing

200 Clearview Dr, St Charles, MO 63303 · 10 mi from O'Fallon

Call (636) 724-8191 Details Website

Verified Oct 2026 · Unclaimed listing

Chesterfield Irrigation

100/100
✓ MO Certified Backflow Tester Verified #34-10712 ★ 3.5 (33 reviews) 4 certified testers Backflow Testing

727 Spirit of Saint Louis Blvd, Chesterfield, MO 63005 · 10 mi from O'Fallon

Call (636) 537-9795 Details Website

Verified Oct 2026 · Unclaimed listing

Roden Landscaping

90/100
✓ MO Certified Backflow Tester Verified #34-8418 ★ 4.6 (7 reviews) 2 certified testers Backflow Testing

7800 State Rte N, O'Fallon, MO 63368 · 2 mi from O'Fallon

Call (636) 561-3947 Details Website

Verified Oct 2026 · Unclaimed listing

Superior Service

90/100
✓ MO Certified Backflow Tester Verified #36-12691 ★ 4.9 (2605 reviews) Backflow Testing

101 Stag Industrial Blvd, Lake St Louis, MO 63367 · 4 mi from O'Fallon

Call (314) 209-7500 Details Website

Verified Oct 2026 · Unclaimed listing

Pipe Guys

90/100
✓ MO Certified Backflow Tester Verified #32-13204 ★ 5 (20 reviews) Backflow Testing

1072 Wies Industrial Dr, Lake St Louis, MO 63367 · 4 mi from O'Fallon

Call (314) 930-6009 Details Website

Verified Oct 2026 · Unclaimed listing

Automatic Rain

90/100
✓ MO Certified Backflow Tester Verified #34-12533 ★ 4.3 (23 reviews) 2 certified testers Backflow Testing

1491 E Pearce Blvd, Wentzville, MO 63385 · 6 mi from O'Fallon

Call (314) 387-0069 Details Website

Verified Oct 2026 · Unclaimed listing

Hauser Mechanical

90/100
✓ MO Certified Backflow Tester Verified #13-10923 ★ 3.2 (9 reviews) 2 certified testers Backflow Testing

1430 Mid Rivers Industrial Dr, St Peters, MO 63376 · 6 mi from O'Fallon

Call (636) 970-4416 Details

Verified Oct 2026 · Unclaimed listing

Out Door Décor

90/100
✓ MO Certified Backflow Tester Verified #34-2777 ★ 5 (17 reviews) Backflow Testing

553 Kimberly Ln, St Peters, MO 63376 · 7 mi from O'Fallon

Call (636) 697-2311 Details Website

Verified Oct 2026 · Unclaimed listing

MH Contracting

90/100
✓ MO Certified Backflow Tester Verified #32-8101 ★ 4.6 (25 reviews) Backflow Testing

2256 Autumn Trace Pkwy, Wentzville, MO 63385 · 9 mi from O'Fallon

Call (314) 960-3008 Details Website

Verified Oct 2026 · Unclaimed listing

Wayne's Plumbing

80/100
✓ MO Certified Backflow Tester Verified #06-8594 Backflow Testing

75 Saybridge Manor Pkwy, Lake St Louis, MO 63367 · 4 mi from O'Fallon

Call (636) 561-1499 Details

Verified Oct 2026 · Unclaimed listing

3 Seasons Irrigation

80/100
✓ MO Certified Backflow Tester Verified #34-12361 ★ 4.6 (16 reviews) Backflow Testing

1419 Diehr Road, Wentzville, MO 63385 · 6 mi from O'Fallon

Call (636) 262-8026 Details

Verified Oct 2026 · Unclaimed listing

Henrys Irrigation

80/100
✓ MO Certified Backflow Tester Verified #32-2826 ★ 5 (11 reviews) Backflow Testing

110 River Grv Ct, O'Fallon, MO 63366 · 6 mi from O'Fallon

Call (636) 466-5324 Details

Verified Oct 2026 · Unclaimed listing

Builders Bloc

100/100
✓ MO Certified Backflow Tester Verified #06-1893 ★ 3.4 (18 reviews) 2 certified testers Backflow Testing

285 Chesterfield Business Pkwy, Chesterfield, MO 63005 · 11 mi from O'Fallon

Call (314) 336-0200 Details Website

Verified Oct 2026 · Unclaimed listing

Chesterfield Service

100/100
✓ MO Certified Backflow Tester Verified #32-9598 ★ 4.9 (4483 reviews) 2 certified testers Backflow Testing

245 Chesterfield Industrial Blvd, Chesterfield, MO 63005 · 11 mi from O'Fallon

Call (636) 532-5841 Details Website

Verified Oct 2026 · Unclaimed listing

Wiegmann Associates

100/100
✓ MO Certified Backflow Tester Verified #13-11576 ★ 4 (8 reviews) 6 certified testers Backflow Testing

650 Fountain Lakes Blvd, St Charles, MO 63301 · 11 mi from O'Fallon

Call (636) 940-1056 Details Website

Verified Oct 2026 · Unclaimed listing

City of O'Fallon Utility Services: backflow test rules

  • Who must test. Devices are required on all irrigation systems, fire sprinkler systems and commercial service lines. Source.
  • Notices and deadlines. No mailed notice is described. Source.
  • How the report is filed. Email backflow@ofallonmo.gov or fax 636-379-5618; no portal. Mailing address line was not captured in the page text. Source.
  • Fees. Charged if the report is not received by June 1. Source.
  • Approved testers. City points to the Missouri DNR list. Source.

Everything about City of O'Fallon Utility Services's backflow program

Independent certified testers based in O'Fallon

Testers Missouri's roster lists without a company. Names, certificate numbers and phones as the state publishes them.

TownTesterCertificateExpiresPhone
O'Fallon Jason D. Bruer 34-0543 Mar 2027 (314) 440-4370

Never miss your annual backflow test

Most water utilities require the backflow assembly on an irrigation, fire or commercial line to be tested every year, and a missed test can mean a shutoff notice. Tell us when yours was last tested in O'Fallon and we'll text you a month before it is due, with certified local testers ready to book.

Free. One text before your test is due. No spam, cancel anytime. Privacy

Backflow testing questions in O'Fallon

Who can test a backflow preventer in O'Fallon?

A tester certified by Missouri Department of Natural Resources. Your water utility may also keep its own list of testers allowed to file reports. In O'Fallon, see City of O'Fallon Utility Services's rules below.

How many certified backflow testers are based in O'Fallon?

22 testers who test for the public list O'Fallon as their base on Missouri's roster, and 99 testing businesses are within 25 miles.

How often do I need a backflow test?

Most utilities require a test when the assembly is installed and then every year. Your utility's notice gives the due date and how the tester files the report.

Roster: Missouri Department of Natural Resources, read October 6, 2026.

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