Mosquitoes usually breed in slightly alkaline water. If water is acidic, breeding and metamorphosis of mosquitoes is affected. secondly, larval nutrition is another important factor responsible for completion of life cycle of mosquitoes. Lower pH of water in not favourable for mosquito breeding.

Thank you shabad for your exelente answer, actually i work in this path. Cordially 

Very true Celina, even I have collected Anopheles from water coolers besides Aedes, there seems to be a habitat shift phenomenon going on in mosquito populations. Hence no wonder if we see them in unusual habitats.

we have recently published an article dealing with this topic, the quality of the water in which the different species of Algerian Sahara live (Effects of certain natural breeding site characteristics on the distribution of Culicidae (Diptera) mosquito species in southeast Algeria ). my concern is to make changes on the quality of the water in the conditions of the laboratory

Pollutant water are the breeding grounds of mosquitoes. Most mosquitoes prefer stagnant or polluted water as their breeding sites. Some species of mosquitoes prefer clean water as well. Water quality of mosquito larval habitats is important to know whether they can survive and complete their life cycle in that habitat. And also, water quality parameters (physic-chemical properties) of water of larval habitats of mosquitoes are studied for implementing larval management programmes.

Thanks to answer me, it is very important your comments

I' m also working in this area and all the answers were informative.

Jiji p v, thanks for your comment