Mixed Well Water Testing Results
The City of Simonton has been notified that some well water tests are showing mixed results. The City has determined that it would be beneficial to begin tracking the residential properties that have shown mixed test results from testing their water well. Please fill out the form below to report your results. Mixed results include well tests that began negative and now have changed to positive readings. This information will help the City assist residents.
For residents that have treated and continue to have positive results, the following list are suggestions:
- Check the type of bleach. Some bleach does not have enough sodium hypochlorite (unscented chlorine laundry bleach containing 5 to 6% sodium hypochlorite). Not all bleaches will work.
- Do not use bleach that is scented or odorless—it should have a sharp chlorine odor.
- Use a bleach that has a NSF seal or says “meets NSF Standard 60” on the label.
- Are you using enough bleach to disinfect? The safewell (002) document has a chart and please refer to the “Post Flood” amounts to use. This is considered as “Shocking “ the water to effectively treat.
- Are you allowing enough “contact time” for the bleach to sit in the well and “shock” or treat? The bleach should sit for at least 24 hours or longer if so needed. If the bleach is at the correct strength, it must have time to make contact with the bacteria to be effective.
- It may take 4 or 5 good “shocks” for a water well to respond. So, you should keep treating until the sample confirms a negative result.
If you continue to have mixed testing results or struggling to get a negative result, we suggest hiring a licensed well service provider to evaluate the system.