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home insurance?

i live in southern california and my home value is 600,000. I pay 2,200 for insurance every 6 months. i think this is a little too high but would like to know if this is average. When i bought the house i was too excited that i didnt even talked to my insurance agent, who is located in Fresno, Ca. I do live near a school could that also be the reason why my home insurance is so high? Could the location make any different? Can i also change insurance or will there be a penalty? I have no clue? My insurance is through Farmer.
thanks in advance!!!!!