Tree roots are being blamed for a 98,280-gallon sewage spill in Sausalito that went unnoticed for two weeks.
The overflow started on March 17 and went undetected because of heavy vegetation, according to the county. The spill was stopped on March 31.
The spill, between 71 and 67 Woodward Ave., was caused by roots blocking a private sewer lateral, said Gregory Pirie, a county environmental health official.
Pirie said water samples taken on Thursday near the spill location and at a catch basin off Easterby Street and Filbert Avenue showed high levels of E. coli, coliform bacteria and enterococcus bacteria.