Backflow testing for dry cleaners and high-hazard commercial accounts
Anderson Electric City’s hazard table lists dry cleaners as high hazard. Laundromats are listed as low hazard. Charleston Water System, under the same state rule, lists dry cleaners among businesses that install a preventer and test it annually.
Sources checked October 2, 2026.
Anderson’s table is in the September 2008 Cross Connection Control Policy. The policy says the table is a guide and that each facility is evaluated on its own. Charleston’s commercial list is on Backflow Requirements for Commercial Customers. Charleston is not an Upstate utility. It is a second South Carolina example of the same kind of rule.
Why the process in the shop matters
Anderson’s policy describes a high hazard as a cross connection that could cause death, illness, or the spread of disease if it reached the public supply. Dry cleaning uses solvents and other chemicals. The protection the Anderson policy names for a high hazard is an air gap, a reduced pressure principle assembly, or a pressure vacuum breaker where backpressure is not expected. Your utility, not this page, chooses the device for your address.
A low-hazard listing, such as laundromats on Anderson’s table, is not a free pass. The assembly still has to match what that utility required, and it still has to be tested on the schedule in your letter.
What the annual letter is asking
The letter is the utility telling the account that a test is due and how the report gets back to them. Hire a General Tester, the classification allowed to test for the public, and make sure they file inside the window printed on the letter. A Limited Tester only tests assemblies owned by their employer.
Greenville Water customers can follow the portal steps. Anderson customers can follow the 10-day test-form rule in the 2008 policy. The cost guide keeps tester prices and utility fees apart.
Why this site exists
Major Cleaners is a commercial account that gets this test. The people behind this directory built it because the notice and the filing steps are confusing, not because the site sells tests. This page is not a tester listing and not an advertisement for a cleaner.