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.
Illinois USDA Hardiness Zone Map. Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Illinois which ranges from USDA Zone 4b to USDA Zone 6b. 1990 USDA Hardiness Zone Maps for Neighboring States and Provinces.