hi thapa,

with respect to your question:

As of few survey and research related to ground water discussed the correlation of other trace elements like B, Fe,  Al and also the role of bicarbonates and pH.

hope this link might useful regarding your query :

https://www.hindawi.com/journals/isrn/2013/930207/#B4

Thank you sir. Naresh Kumar for your suggestion. It is good research work but it didn't suggested any correlations. 

Thanks You Bhavya G. for your helpful reference. 

Dear Raju Thapa,

please find the F / trace element relationships from Central Finland attached below.

Best regards, Jorma

Concentration of Fluoride in water based on dissociation and dissolution of Fluoride mineral/ rock  interaction with ground water. Any relation of Fluoride with Arsenic, Boran and Strontium depend on source rock in consistent with these elements.

I agree with Saxena answer, the concentration of Fluoride in water based on dissociation and dissolution of Fluoride mineral/ rock  interaction with ground water. Any relation of Fluoride with Arsenic, Boran and Strontium depend on source rock in consistent with these elements.

Based on my recent research on fluoride occurrence in groundwater in northern Nigeria, especially in rocks of granitic origin, it is evident that nacaphite (Na2CaPO4F), a fluoride bearing mineral occur in association with other metals. Based on rock water interaction processes, they are released into the groundwater system under acidic condition thereby enriching the groundwater.

Valuable answers

pH and calcium content in the surrounding environment play major role in soluble fluoride concentration in water.

So true Supriya Singh....