DECATUR, Ala. – In the attached press release from ADEM, Decatur Utilities is NOT listed among the state’s water systems where tests have shown concentrations of PFOS or PFOA to be at or above the final health advisory level.
Tests of Decatur Utilities finished drinking water confirm that PFOA and PFOS are not present.
The tests were performed at the direction of the Alabama Department of Environmental Management (ADEM) and in compliance with the Environmental Protection Agency’s (EPA) Unregulated Contaminant Monitoring Rule 3.
In all tests there was no detectable, or zero, levels of Perfluorooctanoic acid (PFOA) or Perfluorooctyl Sulfonate (PFOS) present.
Decatur Utilities spelled out its treatment process step by step:
- Screening to remove solids from raw water (sticks, branches, leaves, etc.)
- Chemical addition – causes the remaining solids to clump together. Acts like a magnet for dirt – causing particles to clump together so they will settle.
- Flocculation – slow mixing to make sure all particles come in contact with the chemicals and water.
- Sedimentation – the solids that clump together slow down and settle to the bottom of the basin. (DU’s WTP has 14 sedimentation basins.)
- Filtration – water passes through a filter media to remove particulate matter. (DU’s WTP uses 40 filters.)
- Disinfection – addition of chlorine as final step of purification
- Treatment process takes approximately 24 hours from raw water intake to delivery.