Backflow Testing in Ohio
Backflow Testing across Ohio: the 818 ZIP codes and 560 cities we route calls in, and who licenses plumbers in the state.
Free to homeowners in Ohio — the contractor pays us for the introduction, you never do.
Who has to test
Our backflow testing coverage in Ohio runs to 818 ZIP codes in 560 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 818 ZIP codes across 560 Ohio cities, in 63 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 Ohio
Ohio licenses are issued by the Ohio Construction Industry Licensing Board, Department of Commerce, which publishes a public search you can use before work begins. Ohio licenses commercial plumbing contractors at state level; residential-only work is generally regulated locally.
18 of the 63 Ohio counties we cover, from the top of the alphabet
- Adams County 4 ZIP codes
Peebles, Seaman, West Union, Winchester - Ashland County 2 ZIP codes
Loudonville, Perrysville - Ashtabula County 3 ZIP codes
Ashtabula, Conneaut, Geneva - Athens County 4 ZIP codes
Buchtel, Glouster, Nelsonville, Trimble - Brown County 8 ZIP codes
Fayetteville, Feesburg, Georgetown, Hamersville, Higginsport, Mount Orab, Russellville, Sardinia - Butler County 17 ZIP codes
Hamilton, Fairfield, Middletown, West Chester, Monroe, Okeana, Overpeck, Oxford, Seven Mile, Somerville, Trenton - Champaign County 10 ZIP codes
Cable, Christiansburg, Conover, Mechanicsburg, Mingo, North Lewisburg, Rosewood, Saint Paris, Urbana, Woodstock - Clark County 16 ZIP codes
Springfield, Catawba, Clifton, Donnelsville, Enon, Medway, New Carlisle, North Hampton, South Charleston, South Vienna, Tremont City - Clermont County 15 ZIP codes
Amelia, Batavia, Bethel, Chilo, Felicity, Goshen, Loveland, Miamiville, Milford, Moscow, Neville, New Richmond, Newtonsville, Owensville and 1 more - Clinton County 9 ZIP codes
Blanchester, Clarksville, Martinsville, Midland, New Vienna, Port William, Reesville, Sabina, Wilmington - Columbiana County 20 ZIP codes
Columbiana, East Liverpool, East Palestine, East Rochester, Elkton, Hanoverton, Homeworth, Kensington, Leetonia, Lisbon, Negley, New Waterford, North Georgetown, Rogers and 6 more - Coshocton County 9 ZIP codes
Blissfield, Brinkhaven, Conesville, Coshocton, Fresno, Plainfield, Walhonding, Warsaw, West Lafayette - Crawford County 5 ZIP codes
Bucyrus, Crestline, Galion, North Robinson, Sulphur Springs - Cuyahoga County 53 ZIP codes
Cleveland, Euclid, Chagrin Falls, Strongsville, Bay Village, Beachwood, Bedford, Berea, Brecksville, Broadview Heights, Brook Park, Gates Mills, Independence, Lakewood and 7 more - Darke County 15 ZIP codes
Ansonia, Arcanum, Gettysburg, Greenville, Hollansburg, New Madison, New Weston, North Star, Osgood, Palestine, Pitsburg, Rossburg, Union City, Versailles and 1 more - Defiance County 1 ZIP code
Hicksville - Delaware County 10 ZIP codes
Westerville, Delaware, Galena, Lewis Center, Ostrander, Powell, Radnor, Sunbury - Erie County 2 ZIP codes
Huron, Vermilion
45 more Ohio counties are inside the coverage area and are not listed here. If your ZIP code is in Ohio, the call reaches a contractor.
What that coverage looks like
The 63 counties in our Ohio footprint are served by many separate water suppliers, and each one decides which premises must test and how often. Clermont County, with 86 covered ZIP codes, is the largest single block of them; Cincinnati 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 Ohio city we route in
130 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.
- Beachwood 29%
- Lakewood 25%
- Euclid 23%
- Rocky River 22%
- Wickliffe 19%
- Bedford 19%
- Willoughby 16%
- Cleveland 15%
- Kent 14%
- Westlake 13%
- Columbus 12%
- New Lexington 11%
- North Olmsted 11%
- Niles 11%
- Cuyahoga Falls 11%
- Sheffield Lake 11%
- Cincinnati 10%
- Berea 9%
- Dublin 9%
- Strongsville 9%
- Akron 9%
- Hilliard 8%
- Columbiana 8%
- Milford 7%
- West Chester 7%
- Eastlake 7%
- Westerville 7%
- Miamisburg 7%
- Tallmadge 7%
- Stow 7%
- Batavia 7%
- Twinsburg 7%
- Canal Winchester 6%
- Wadsworth 6%
- Brunswick 6%
- Campbell 6%
- Broadview Heights 6%
- North Royalton 6%
- Oberlin 6%
- Dayton 6%
- Avon Lake 6%
- Youngstown 6%
- Lewis Center 6%
- Hudson 5%
- Lorain 5%
- Springfield 5%
- Ashtabula 5%
- New Albany 5%
- Coshocton 5%
- Solon 5%
- Fairborn 5%
- Elyria 5%
- Zanesville 5%
- Oxford 5%
- Fairfield 5%
- Delaware 5%
- Bay Village 5%
- London 5%
- Huron 4%
- Olmsted Falls 4%
- Newark 4%
- Groveport 4%
- Marion 4%
- Upper Sandusky 4%
- Grove City 4%
- Barberton 4%
- Canton 4%
- East Liverpool 4%
- North Canton 4%
- Newton Falls 4%
- Uniontown 4%
- Reynoldsburg 4%
- Xenia 4%
- Brook Park 4%
- Loveland 4%
- Warren 4%
- Medina 4%
- Troy 4%
- Mansfield 4%
- Macedonia 4%
- Chillicothe 4%
- Mount Orab 4%
- Germantown 4%
- Aurora 4%
- Franklin 3%
- Alliance 3%
- Painesville 3%
- Hamilton 3%
- Granville 3%
- Chardon 3%
- Mentor 3%
- Brecksville 3%
- Chagrin Falls 3%
- Heath 3%
- Middletown 3%
- Ravenna 3%
- Blacklick 3%
- Blanchester 3%
- Lancaster 3%
- Canal Fulton 3%
- Monroe 3%
- Mason 3%
- Bellefontaine 3%
- Struthers 3%
- Pickerington 3%
- Ashville 3%
- Lebanon 3%
- Conneaut 3%
- Amelia 3%
- Bucyrus 3%
- Geneva 2%
- North Ridgeville 2%
- Salem 2%
- Kenton 2%
- Avon 2%
- Maple Heights 2%
- Maineville 2%
- Cambridge 2%
- Wilmington 2%
- Streetsboro 2%
- Brookville 2%
- Sidney 2%
- Girard 2%
- Marysville 2%
- Northfield 2%
- Trenton 2%
- Mount Vernon 2%
- West Union 2%
- Greenville 2%
- Hubbard 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.
