| Quick facts | Answer |
|---|---|
| Cost range | $40-$85 residential; $125 commercial |
| Time | Varies by property - confirm timing in your quote |
| Who's qualified | A state-certified backflow prevention tester with a current certification card |
Why Charleston irrigation backflow testing is required yearly
Charleston Water System requires annual testing, and all reports must be filed with the applicable fees through its third-party reporting process. The city's coastal location and frequent storms and flooding increase the risk of backflow events. Humid conditions, with average relative humidity around 75% to 80%, add to the importance of protection during wet weather.
Who can perform irrigation backflow testing in Charleston
South Carolina requires all backflow testing to be done by a state-certified backflow prevention tester. A certified tester holds an up-to-date certification card issued by the Department. Certification types include General Tester, Limited Tester, Inspector Tester, and Manufacturer's Agent.
How testers get certified for backflow work in South Carolina
Becoming a certified tester requires passing a proctored practical exam and a written exam. Certification is valid for 3 years before recertification is required. Training courses, such as one at Midlands Technical College, require 4 days of training plus a written exam and a hands-on exit exam, with tuition listed at $699.00 plus fees and equipment.
Where to find a backflow tester certification class near Charleston
South Carolina DES has listed a tester certification class at the North Charleston Convention Center, with dates shown as June 9-12, 2026. Check the state's Cross Connection Control & Backflow Prevention program for current class listings. Ask any tester you hire for proof of a current certification card.
What to do next
- Schedule your annual irrigation backflow test before Charleston Water System's filing deadline.
- Ask the tester to show a current South Carolina backflow prevention assembly tester certification card.
- Request a written quote that states the per-device price and any filing fees.
- Confirm the report will be filed through the water system's third-party reporting process.
- Call (843) 286-4721 or email [email protected] for a free quote from a licensed, insured local backflow tester.
CHS Backflow is a free referral service: an independent contractor does the work and may pay us a referral fee. You never pay us anything.
