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.
In most years, Chicago averages a daily maximum temperature for December that's between 29 and 40 degrees Fahrenheit (-2 to 5 degrees Celsius). The minimum temperature usually falls between 15 and 27 Â°F (-10 to -3 Â°C). The days at Chicago continue to grow colder during December.