Joliet, Illinois, is a growing city in Will County with a mix of older residential neighborhoods, new subdivisions, and a significant commercial and industrial sector including the Joliet Arsenal redevelopment area and several large distribution centers. The local water supply is managed primarily by the City of Joliet’s Water Department and various private well systems in outlying areas. Illinois state law and local municipal codes require annual backflow prevention device testing for most commercial properties, multi-family buildings, and many residential irrigation systems. As development continues along the I-80 and I-55 corridors, demand for certified backflow testers is rising. The market is moderately competitive, with a handful of established plumbing companies offering testing, but there is room for a dedicated, locally focused backflow testing business that emphasizes fast scheduling, digital reports, and knowledgeable customer service.
To perform backflow testing in Illinois, you must hold a valid Illinois Department of Public Health (IDPH) Backflow Prevention Device Tester Certification. This requires completing an approved training course and passing both a written and practical exam. Certification must be renewed every three years with continuing education credits. You can find approved training providers through IDPH or organizations like the American Backflow Prevention Association (ABPA).
You must register your business with the Illinois Secretary of State as a sole proprietorship, LLC, or corporation. An LLC is recommended for liability protection. Next, obtain a City of Joliet Business License through the city’s Revenue Division. As of 2025, the fee varies by business type; a home-based service business typically pays around $100 annually. If you operate from a commercial location, additional zoning permits may apply. Additionally, Will County requires a County Business License for any unincorporated area work. Check with the Will County Clerk’s office.
General liability insurance ($1 million minimum) is essential. Many commercial clients and property managers require proof of insurance before allowing testing on their premises. Also consider errors and omissions insurance to cover potential report inaccuracies. Workers’ compensation insurance is required by Illinois law if you have any employees.
Joliet’s Municipal Code (Chapter 51, Article VI) mandates that all backflow prevention assemblies be tested upon installation and annually thereafter by a certified tester. Reports must be submitted to the City’s Water Department within 10 days. You must use the city’s approved form or a compatible online system. Familiarize yourself with the Joliet water service area map—parts of the city are served by the Joliet Waterworks system, while others use private wells where testing may still be required by local code.
Go to Google Business Profile (formerly Google My Business) and claim your listing. Use your actual Joliet business address—if you work from home, you can set the service area to “Joliet and surrounding areas” without showing your home address publicly. Verify via postcard, phone, or email (Google often uses video verification for service-area businesses).
Use a name that clearly describes your service: “Joliet Backflow Testing” or “Will County Backflow Services LLC.” Avoid stuffing keywords unnaturally. Ensure the name matches your registered business name and any signage.
Select the primary category “Plumber” or “Fire protection system supplier” if you also do fire line testing. A more accurate category is “Backflow prevention device tester” if it appears in the drop-down; otherwise use “Plumber.” Add secondary categories such as “Water well drilling contractor” or “Irrigation system installer” if relevant. Under attributes, check “Free estimates,” “Service area,” and “Online appointments.”
Write a compelling business description (750 characters max). Include keywords like “backflow testing Joliet,” “certified backflow tester,” “annual backflow inspection,” and “commercial backflow prevention.” List your services: “Residential backflow testing,” “Commercial backflow testing,” “Fire sprinkler backflow test,” “Irrigation backflow test,” and “Backflow repair services.” Add your phone number with a local 815 or 779 area code. Add your website URL and link to your online scheduling page.
Upload at least 10 high-quality photos: your truck with your business logo, a tester performing a backflow test, a close-up of a backflow device, and your certification credentials. Add a short video (30-60 seconds) explaining what backflow testing is and why it matters. Geo-tag photos with Joliet landmarks when possible.
Encourage every customer to leave a Google review. Respond to all reviews professionally, especially negative ones. Use the Q&A section to answer common questions like “Do you test all brands of backflow devices?” and “How quickly can you schedule a test in Joliet?”
Target phrases like “backflow testing Joliet,” “backflow tester near me,” “Joliet backflow prevention testing,” “commercial backflow testing Will County,” and “irrigation backflow test Joliet.” Also target neighborhood-specific terms: “Crest Hill backflow tester,” “Shorewood backflow testing,” “Rockdale backflow test,” and “Plainfield backflow services.” Use tools like Google Keyword Planner or Ahrefs to confirm search volume.
Create a dedicated “Service Areas” page listing Joliet and all surrounding towns (Channahon, Minooka, Elwood, Mokena, New Lenox, Frankfort, Lockport, Romeoville, Bolingbrook). Include a map embed and local landmarks. Write a detailed “About” page that mentions your IDPH certification, years of experience in Will County, and your mobile testing unit. Each service page should include the target keyword in the H1 tag, meta description, and content naturally.
Get listed on Yelp, Angi, HomeAdvisor, Nextdoor, and the Joliet Chamber of Commerce directory. Also claim listings on IL-specific directories like IllinoisBackflow.com and the Will County Small Business Association. Ensure your Name, Address, and Phone number (NAP) are consistent across every listing. Use a local phone number (815 or 779) rather than a toll-free number.
Sponsor a local youth sports team or the Joliet Fire Department charity event to get a link from their website. Write guest posts for the Joliet Patch or local real estate blogs about water safety and backflow prevention. Partner with Joliet plumbing companies to be their preferred backflow tester—they can link to your site from their referral page.
Set your Google Business Profile service area to a 20-mile radius centered on Joliet. Add posts regularly: “Just tested 15 backflow devices at the Joliet Town Center” or “Annual testing reminder for Joliet commercial properties.” Use Google’s “Products” section to list your testing packages with prices.
Joliet pricing falls between Chicago suburbs and more rural Will County towns. Typical rates as of early 2025:
Run a free GBP audit, analyze your competitors, and track your review growth — all in one platform.
Try BizLaunchIQ Free →