my mom has been having problems for years with the owner of the property she rents from . there are major plumbing issues , improper venelation , black mold that is causing health issues , and now to top it all off she has just been released from the hospital for carbon monoxide poisoning that she has somehow got . the gas company came out but they cannot find where it is coming from but the only place she could of got it is from her house ... the owner is now refusing to agknowledge this . nor is he willing to fix the plumbing (she has no cold water only hot and the plumbing is very old and the toilet and sinks plug and do not work properly .. and he will not do anything about the mold that is basically infesting the whole house and i believe is a health hazard .. we are at our wits end my mom cannot afford to move and is staying with me until we figure this out but she is still paying rent we are in california does anybody have any suggestions on what we can do ??? is he breaking laws and can he be considered a slum lord ??? please help