Dear El Mourabit Youssef, below please find a link outlining the potential dangers of excess chlorination of drinking water:

https://aquascienceaz.com/blog/warning-signs-of-high-chlorine-levels-in-your-water/

Yes, there is high possibility

Thanks to Dr. Oluwadara Pelumi Omotayo, Dr.Frank T. Edelmann and to Dr. Augustine Ifelebuegu for your contributions.

May create bladder problems.

Thank you Dear Aijaz Panhwar.

Thank you Marina Vasiljevic for your contribution.

In addition to what prof. Vasiljevic said, there is high chance of formation of chlorite (ClO2) chlorate (ClO3) and per chlorate (ClO4) anions if the excess chlorine is expose to solar light, all of which are toxic and listed on the EPA priority list of toxic compounds. Although the acceptable level in surface water differs

Ok dear Soliu Ganiyu , thank you for your contribution.

Of course, excessive chlorination would lead to higher production of disinfectant byproducts, which is absolutely unhealthy for both fauna and flora. More reactive species production can cause mutations too.

Thank you Dear Muhammad Arslan for your contribution.

One would have to rely on long-term research. The question is whether they are available. These may be the effects that will show up after many years.