The number of phone calls does not determine when or where treatment for adult mosquitoes will be done. Spraying for adult mosquito outbreaks occur only on an as needed basis. TMAD conducts several on-going types of surveillance to quantify mosquito populations. In general, staff are aware of mosquito population increases. Occasionally, phone calls are important because they alert the District of potential problem areas that surveillance has not predicted. It could also indicate an individual is experiencing a problem specifically in their property or neighborhood. In these situations, an inspector will be contacted to check for mosquitoes.