Actualización de la peticiónSTOP SODIUM HYDROXIDE FROM BEING ADDED TO THUNDER BAY'S DRINKING WATERHodder Zone Pilot Study data Collection nears Completion. The Questions to be Answered.
Thunder Bay Water Watch
17 dic 2016
It has been almost a year since the City began it's test with the addition of sodium hydroxide (NaOH) into a section of Current River resident's water supply . The " Hodder Zone Pilot Study" data collection is ongoing until the end of 2016. If any readers would like to share test results or any personal feedback related to this test we welcome your email to Tbaywaterwatch@gmail.com or you can post your comments on this page. We have been told that the City has undertaken to inform the public about the results of the Current River NaOH test when it is complete, and will answer the following questions: => what was the testing protocol, and how close to 'real-world' conditions does it simulate? * what pH values were reached in the Current River test area after the maximum addition of NaOH? * what was the average lead level before and after the addition of NaOH in residences that do not have lead feeder lines or plumbing? * what was the average lead level before and after the addition of NaOH in residences that do have lead feeder lines? * how big is the sample in each case? Are the results statistically significant, and what is the confidence interval? * did tests confirm that the water chlorination remained effective for disinfection at the higher pH levels? What were bacteria levels pre- and post-addition of NaOH? Was the change statistically significant? Is it of concern? * did trihalomethane levels increase after the addition of NaOH? Was the change statistically significant? Is it of concern? * how many concerns were received from residents in the Current River NaOH test zone? Were they resolved to the residents' satisfaction? *given the test results to date, does the water authority consider that NaOH is effective in reducing the lead level? * has the lead level been decreased to be in compliance with drinking water standards of 10 ppb? * Does the sampling protocol reflect real world conditions, or should residents with lead lines be encouraged to flush lines before drinking the water - even if the standard has been met? * is anything else planned for the test area? * are the plans to roll-out NaOH addition City-wide? If so, when?
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