Inflow/Infiltration (I/I) such as depicted here can result in an overburdening of the
sanitary sewer system, which may result in SSO's--Sanitary Sewer Overflows. SSO's
are violations of several federal regulations, including Section 301 of the Clean Water
Act and National Pollutant Discharge Elimination System permit requirements. And as
you can imagine, SSO's are nothing new! Frequently, as
illustrated by the manhole photo at the top, entire segments of sewer network have been
around for decades--some even date from the turn of the century or earlier!
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