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In the model, areas that
are most suitable for septic systems are indicated in green, and those that
are less suitable are in red.
The maximum value was 9, at areas where new septic systems should be
developed with care and old ones should be cited for repairs. These areas are characterized by
high slopes and soil types that drain too quickly to leach out
nutrients. Areas that have low
slopes and soils that hold water for excessively long periods of time were
also likely to have low septic suitability.
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