The fate of three groups of microorganisms â bacteria, protozoa, and viruses â in wastewater is an important consideration in onsite sewage treatment and disposal systems (hereafter referred to as septic systems).he fate of three groups of microorganisms â bacteria, protozoa, and viruses â in wastewater is an important consideration in onsite sewage treatment and disposal systems (hereafter referred to as septic systems).
Forget maps......Chicago is in zone 5...and gardeners wishing to plant those plants that are hardy to the Chicago area had better realize that zone 5 plants are the ones to buy. Besides zones are a relative term. Chicago is on the shores of Lake Michigan and the closer to the Lake, the more moderate the temperatures.
Chicago has a humid continental climate with hot summers and no dry season. The temperature typically varies from 21Â°F to 83Â°F over the course of the year, and is rarely below 3Â°F or above 91Â°F. The warm season lasts for 113 days, from May 30 to September 20, with an average daily high temperature above 73Â°F.