2007 – 2015 – Nyngan (New South Wales) – Fluoride
NSW Health had recorded 02 high fluoride values of 2.04 and 2.29 in reticulation system on 30thof June and 20thof October in 2015 respectively. Hence NSW Health advised to shut down the fluoridation plant from 23/10/2016. Existing system gives 93 % compliance to critical control operational limits.Theexisting fluoridation plant (system), has been already identified to replace in 2016, under NSW Health funds since it didnot meet the requirement of the New South Wales Code of Practice for Fluoridation of Public Water Supplies 2011, in a number of areas…
The existing Fluoridation system is not compliant with the NSW guidelines. There were 513 noncompliance incidents were recorded over a period of 8 years and the percentage of excedences is 21%. There is a trend of increasing fluoride concentration with current operation. However, the fluoridation system was shut down from 23rdof October 2015, due to reporting of high concentration of fluoride in reticulation system.
“Fluoride occurs naturally in seawater (1.4 mg/L), soil (up to 300 parts per million) and air (from volcanic gases and industrial pollution). Naturally occurring fluoride concentrations in drinking water depend on the type of soil and rock through which the water drains. Generally, concentrations in surface water are relatively low (<0.1–0.5 mg/L), while water from deeper wells may have quite high concentrations (1–10 mg/L) if the rock formations are fluoride-rich.” 2011 ADWG. Health Guideline: 1.5mg/L