Flint Water System Progress - Building Protective Coating and Ensuring Safe Drinking Water
The Flint water system is making progress with the formation of an orthophosphate coating on pipes to reduce lead levels. Residents can safely drink filtered water, but ongoing evaluation is addressing lead particles. Regular filter maintenance is crucial, along with running cold water and flushing pipes to help distribute protective chemicals. The EPA is actively involved in improving chlorine levels and monitoring orthophosphate levels site-by-site. Efforts are ongoing to address particulate lead levels throughout different sites, ensuring the filters' effectiveness and promoting clean drinking water for all residents.
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Presentation Transcript
Flint Water System Progress Robert Kaplan USEPA Region 5 April 8, 2016 U.S. Environmental Protection Agency 1
The drinking water system is recovering, but is unstable. Orthophosphate coating is forming on pipes where enough water is flowing through the pipes Levels of lead dissolved in the water appear to be declining Still problem of random small particles of lead in the pipes, additional evaluation is ongoing Flint residents can safely drink filtered water. EPA and Virginia Tech testing has shown the filters are effective even at very high levels Filters need to be maintained, with cartridges replaced regularly Only run cold water through the filters We need your help - Residents need to run the water in their homes and businesses. To help build the protective orthophosphate coating To help distribute the chlorine, which protects against microbes Flushing the pipes will help clean the sediment out U.S. Environmental Protection Agency 2
Drinking Water System Improving Chlorine U.S. Environmental Protection Agency 3
Drinking Water System Improving Orthophosphate 4 Site 1 Site 2 Site 3 Site 4 Site 5 Site 6 Site 7 Site 8 CS WS 3 Orthophosphate (mg/L) 2 1 0 11/1/2015 12/1/2015 1/1/2016 2/1/2016 3/1/2016 Date U.S. Environmental Protection Agency 4
Particulate Lead Random from House to House Site AT Site G 300 8 7 250 6 200 5 (ppb) (ppb) 150 4 3 100 2 50 1 0 0 DS03at S01at S02at S03at S04at S05at S06at S07at S08at S09at S10at S11at S12at S14at S13at DS03g S06g S01g S02g S03g S04g S05g S07g S08g S09g S10g S11g S12g S13g S14g S15g U.S. Environmental Protection Agency 5
Filters Work U.S. Environmental Protection Agency 6
