BackflowNear Test-Due Reminder

Backflow testing in St Charles, MO

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

127 businesses within 25 miles
1 for-hire testers based in St Charles

Certified backflow testers near St Charles

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 · 2 mi from St Charles

Call (636) 940-1056 Details Website

Verified Oct 2026 · Unclaimed listing

Byrd Plumbing

100/100
✓ MO Certified Backflow Tester Verified #34-10742 ★ 4.3 (23 reviews) 2 certified testers Backflow Testing

500 Little Hills Industrial Blvd, St Charles, MO 63301 · 2 mi from St Charles

Call (314) 867-5696 Details Website

Verified Oct 2026 · Unclaimed listing

KAMS Mechanical

100/100
✓ MO Certified Backflow Tester Verified #06-7692 2 certified testers Backflow Testing

14515 Missouri Bottom Rd, Bridgeton, MO 63044 · 3 mi from St Charles

Call (314) 475-1001 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 · 3 mi from St Charles

Call (636) 724-8191 Details Website

Verified Oct 2026 · Unclaimed listing

Jarrell Mechanical

100/100
✓ MO Certified Backflow Tester Verified #13-13423 ★ 3.7 (25 reviews) 42 certified testers Backflow Testing

4208 Rider Trail N, Earth City, MO 63045 · 3 mi from St Charles

Call (314) 291-0100 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 · 4 mi from St Charles

Call (636) 317-1234 Details Website

Verified Oct 2026 · Unclaimed listing

Metro Lawn Sprinklers

100/100
✓ MO Certified Backflow Tester Verified #34-9140 ★ 4.9 (851 reviews) 17 certified testers Backflow Testing

291 Indacom Dr, St Peters, MO 63376 · 5 mi from St Charles

Call (636) 936-8243 Details Website

Verified Oct 2026 · Unclaimed listing

Finch Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-9187 ★ 4.7 (3 reviews) 8 certified testers Backflow Testing

3377 Hollenberg Dr, Bridgeton, MO 63044 · 5 mi from St Charles

Call (314) 291-4300 Details Website

Verified Oct 2026 · Unclaimed listing

C&R Mechanical

100/100
✓ MO Certified Backflow Tester Verified #06-9578 ★ 3.4 (14 reviews) 17 certified testers Backflow Testing

12825 Pennridge Dr, Bridgeton, MO 63044 · 5 mi from St Charles

Call (314) 739-1800 Details Website

Verified Oct 2026 · Unclaimed listing

Green Turf Irrigation

100/100
✓ MO Certified Backflow Tester Verified #34-9805 ★ 4.9 (584 reviews) 7 certified testers Backflow Testing

73 Millwell Ct, Maryland Heights, MO 63043 · 7 mi from St Charles

Call (314) 739-0410 Details Website

Verified Oct 2026 · Unclaimed listing

Deluca Plumbing

100/100
✓ MO Certified Backflow Tester Verified #06-10229 ★ 2.6 (10 reviews) 18 certified testers Backflow Testing

2466 Old Dorsett Rd, Maryland Heights, MO 63043 · 7 mi from St Charles

Call (314) 427-5551 Details Website

Verified Oct 2026 · Unclaimed listing

Mechanical Solutions

100/100
✓ MO Certified Backflow Tester Verified #13-8149 ★ 4 (5 reviews) 5 certified testers Backflow Testing

2030 Altom Ct, St. Louis, MO 63146 · 9 mi from St Charles

Call (314) 342-1480 Details Website

Verified Oct 2026 · Unclaimed listing

S&S Plumbing Systems

90/100
✓ MO Certified Backflow Tester Verified #06-9195 ★ 5 (72 reviews) 2 certified testers Backflow Testing

143 S 5th St, St Charles, MO 63301 · 2 mi from St Charles

Call (636) 696-6661 Details Website

Verified Oct 2026 · Unclaimed listing

Omega Plumbing

90/100
✓ MO Certified Backflow Tester Verified #06-4317 4 certified testers Backflow Testing

4132 Shoreline Dr # E, Earth City, MO 63045 · 4 mi from St Charles

Call (314) 291-2003 Details

Verified Oct 2026 · Unclaimed listing

Hoffman Borthers

90/100
✓ MO Certified Backflow Tester Verified #32-9660 ★ 4.8 (608 reviews) Backflow Testing

3700 Rider Trail S Ste 100, Earth City, MO 63045 · 4 mi from St Charles

Call (314) 274-3978 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 St Charles

Call (636) 970-4416 Details

Verified Oct 2026 · Unclaimed listing

Focal Pointe

90/100
✓ MO Certified Backflow Tester Verified #34-2665 ★ 4.8 (5 reviews) 2 certified testers Backflow Testing

11950 Missouri Bottom Rd, Hazelwood, MO 63042 · 7 mi from St Charles

Call (636) 346-4837 Details Website

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 St Charles

Call (636) 697-2311 Details Website

Verified Oct 2026 · Unclaimed listing

Cintas Fire

90/100
✓ MO Certified Backflow Tester Verified #32-13668 ★ 4.6 (52 reviews) 3 certified testers Backflow Testing

634 Lambert Pointe Dr, Hazelwood, MO 63042 · 7 mi from St Charles

Call (314) 227-9191 Details Website

Verified Oct 2026 · Unclaimed listing

Plumbing Planning Corp.

90/100
✓ MO Certified Backflow Tester Verified #06-0671 ★ 4.3 (7 reviews) 6 certified testers Backflow Testing

11860 Dorsett Rd, Maryland Heights, MO 63043 · 8 mi from St Charles

Call (314) 739-0057 Details

Verified Oct 2026 · Unclaimed listing

Meyer Landscaping

90/100
✓ MO Certified Backflow Tester Verified #32-1225 ★ 3.9 (14 reviews) Backflow Testing

11285 Florence Ave, St Ann, MO 63074 · 8 mi from St Charles

Call (314) 291-4700 Details Website

Verified Oct 2026 · Unclaimed listing

Design Aire

90/100
✓ MO Certified Backflow Tester Verified #13-6094 ★ 4.9 (2754 reviews) Backflow Testing

2550 Harley Dr, Maryland Heights, MO 63043 · 8 mi from St Charles

Call (314) 739-1600 Details Website

Verified Oct 2026 · Unclaimed listing

Aqueduct Plumbing

90/100
✓ MO Certified Backflow Tester Verified #06-12316 2 certified testers Backflow Testing

2641 Chaucer Ave, St. Louis, MO 63114 · 10 mi from St Charles

Call (314) 423-3334 Details Website

Verified Oct 2026 · Unclaimed listing

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 St Charles and we'll text you a month before it is due, with certified local testers ready to book.

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Backflow testing questions in St Charles

Who can test a backflow preventer in St Charles?

A tester certified by Missouri Department of Natural Resources. Your water utility may also keep its own list of testers allowed to file reports. Check the notice your utility sent.

How many certified backflow testers are based in St Charles?

1 testers who test for the public list St Charles as their base on Missouri's roster, and 127 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.

Approved list: City of Nixa certified backflow testers, City of Nixa.

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