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Lake County Code Chapter 171 provides the rules and regulations for onsite wastewater treatment (OWTS) in the county. OWTS, commonly referred to as septic systems, are used to treat and disperse wastewater for both residential and non-residential property. The systems are used in incorporated and unincorporated areas wherever public sewers do not exist.
OWTS designs are based on estimated wastewater flow and soil conditions. Soil conditions are determined by a professional soil scientist/classifier. The description of the soil from the soil evaluation provides the basis for a particular system type described in the Code. The key characteristic in soil suitability for OWTS is the depth to the seasonal soil saturation.
There are basically five system types presented in the code. The difference in the system types is defined by the depth of seasonal soil saturation (see illustrations below). The treatment of the effluent is critical in protecting surface and groundwater resources.
To receive approval to construct an OWTS (septic system), the following steps must be accomplished:
Drip Dispersal System
Drip Dispersal System - Diagram
Peat Filter
Modified Mound Bed
Type 1 Trench System
Type 1 Trench System - Diagram
Type 4 At-Grade System
Type 4 At-Grade System - Diagram
Type 5 Mound System (2 Beds)
Type 5 Mound System (2 Beds) - Diagram