No...You are suffering from hormonal changes causing Androgenetic alopecia causing hair fall. It's completely stoppable even regrowth of hair is possible with certain medications without any side effects. Treatment depends on the grade of hair loss. So, it's a must for diagnosing which grade, you are in for an effective treatment. Please  send photos of your head, by direct online consultation for accurate diagnosis and proper treatment.

No relation to water.

U need to consult a dermatologist for proper management

Dandruff and bore water are common causes of hairfall along with other causes. U need a full evaluation of ur condition through a personal consultation and then only we can start medications. Consult personally for thr same

Hair fall as no relation with bore water. Your hair quality may deteriorate due to hard water which contains calcium and magnesium salts that are present in bore water. It leads to scum formation and flaking of the scalp.