Tests of the waters of Richardson Bay in Marin County continue to turn up unsafe levels of bacteria. 

After two months of this KCBS Radio reporter Keith Menconi says now officials are stepping up their efforts to find the source of the problem, and residents are beginning to grow uneasy.

<p>Tests of the waters of Richardson Bay in Marin County continue to turn up unsafe levels of bacteria.&nbsp;</p>
<p>After two months of this KCBS Radio reporter Keith Menconi says now officials are stepping up their efforts to find the source of the problem, and residents are beginning to grow uneasy.</p>

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