Backflow Testing in Missouri
Backflow Testing across Missouri: the 380 ZIP codes and 209 cities we route calls in, and who licenses plumbers in the state.
Free to homeowners in Missouri — the contractor pays us for the introduction, you never do.
Who has to test
Our backflow testing coverage in Missouri runs to 380 ZIP codes in 209 cities. Where the covered places are many and small, the testing duty is set by whichever water utility serves the connection, so two houses a mile apart can sit under different rules and different annual deadlines.
Source: coverage area as published by our call partner; place and county names from the US Census Bureau.
We route backflow testing calls in 380 ZIP codes across 209 Missouri cities, in 34 counties.
What this site is
CrossConnect is a referral service, not a contractor. We connect property owners and managers with independent contractors. Backflow assembly testing is normally restricted to testers holding a specific certification and using calibrated equipment, and the report usually has to reach your water purveyor — ask to see the certification and ask who files the report. We carry out no testing, we certify nobody, we do not set prices, and we never charge callers anything. Nothing here selects a device for any installation or states that any assembly is passing.Checking a credential in Missouri
Missouri has no state plumbing board. Section 341.010 of the Revised Statutes requires a certificate for plumbers working in cities or towns of fifteen thousand or more inhabitants, and the chapter elsewhere recognizes licenses issued by any county or city operating under plumbing rules, so the office that issued one is a local office. Start here. Ask the contractor which municipality licenses them and confirm it with that office before work begins.
18 of the 32 Missouri counties we cover, from the top of the alphabet
- Andrew County 1 ZIP code
Savannah - Bates County 1 ZIP code
Drexel - Buchanan County 3 ZIP codes
Agency, De Kalb, Faucett - Caldwell County 2 ZIP codes
Kingston, Polo - Cape Girardeau County 12 ZIP codes
Cape Girardeau, Burfordville, Daisy, Delta, Dutchtown, Friedheim, Jackson, Millersville, Oak Ridge, Whitewater - Cass County 10 ZIP codes
Archie, Belton, East Lynne, Freeman, Garden City, Harrisonville, Peculiar, Pleasant Hill, Raymore, Strasburg - Christian County 13 ZIP codes
Billings, Bruner, Chadwick, Chestnutridge, Clever, Garrison, Highlandville, Nixa, Oldfield, Ozark, Ponce De Leon, Sparta, Spokane - Clay County 7 ZIP codes
Liberty, Excelsior Springs, Holt, Kearney, Missouri City, Smithville - Clinton County 5 ZIP codes
Cameron, Gower, Lathrop, Plattsburg, Trimble - Dekalb County 1 ZIP code
Stewartsville - Franklin County 8 ZIP codes
Catawissa, Gray Summit, Labadie, Pacific, Saint Albans, Union, Villa Ridge, Washington - Greene County 24 ZIP codes
Springfield, Ash Grove, Bois D'Arc, Brookline, Fair Grove, Republic, Strafford, Walnut Grove, Willard - Jackson County 98 ZIP codes
Kansas City, Independence, Lees Summit, Blue Springs, Buckner, Grain Valley, Grandview, Greenwood, Levasy, Lone Jack, Oak Grove, Sibley - Jasper County 17 ZIP codes
Joplin, Alba, Avilla, Carl Junction, Carterville, Carthage, Duenweg, Jasper, Neck City, Oronogo, Purcell, Reeds, Sarcoxie, Webb City - Jefferson County 1 ZIP code
High Ridge - Johnson County 3 ZIP codes
Holden, Kingsville, Warrensburg - Lafayette County 6 ZIP codes
Bates City, Lexington, Mayview, Napoleon, Odessa, Wellington - Lawrence County 11 ZIP codes
Aurora, Freistatt, Halltown, La Russell, Marionville, Miller, Mount Vernon, Pierce City, Stotts City, Verona, Wentworth
14 more Missouri counties are inside the coverage area and are not listed here. If your ZIP code is in Missouri, the call reaches a contractor.
What that coverage looks like
The 34 counties in our Missouri footprint are served by many separate water suppliers, and each one decides which premises must test and how often. Jackson County, with 98 covered ZIP codes, is the largest single block of them; Kansas City alone holds 71.
How a backflow testing job goes
A backflow test is a scheduled job that ends in a document. The assembly is isolated, the differential across it is measured, the result is written down, and the report goes to whoever requires it. A failed test means a repair or a rebuild and then a re-test; it does not mean the premises closes that day.
What the call asks about backflow testing
- What kind of premises it is and what is connected to the supply — irrigation, a boiler, a fire line, a commercial kitchen.
- Who is asking for the test: a water supplier, a health department, or a landlord.
- Whether there is an existing assembly with a serial number on it, and when it was last tested.
Every Missouri city we route in
40 cities, ordered by the share of buildings with twenty or more units. Containment assemblies are required building by building, and that is where the buildings are. Each page carries that city’s own numbers and the ZIP codes we route there.
- Branson 14%
- Kansas City 13%
- Valley Park 12%
- Springfield 11%
- Saint Louis 11%
- Brookline 10%
- Saint Ann 10%
- Chesterfield 7%
- Bridgeton 6%
- Liberty 6%
- Lees Summit 6%
- Hollister 6%
- Independence 6%
- Saint Charles 5%
- Joplin 5%
- Hazelwood 5%
- Excelsior Springs 5%
- Florissant 5%
- Platte City 4%
- O'Fallon 4%
- Ballwin 4%
- Savannah 4%
- Warrensburg 4%
- Cape Girardeau 4%
- Wentzville 4%
- Maryland Heights 4%
- Webb City 4%
- Raymore 3%
- Saint Peters 3%
- Neosho 3%
- Eureka 3%
- Blue Springs 3%
- Willard 3%
- Nixa 3%
- Grain Valley 3%
- Lake Saint Louis 3%
- Grandview 3%
- Reeds Spring 2%
- Belton 2%
- Fenton 2%
Before you call
A test is a scheduled job with a report at the end of it, not a repair. What the report has to show, and who it goes to, are on the pages above.
