| Figure
3.14. |
Dissolved mercury (Hg) concentrations in water
in parts per billion (ppb) at 24 RMP stations sampled
in January, April, and August 1997. Note logarithmic
scale. 
= not detected. Concentrations ranged from not detected
to 0.035 ppb. The highest concentration was at Petaluma
River (BD15) in January. Average concentrations
were highest (0.0085 ppb) in the Northern Estuary
in January and lowest (0.00026 ppb) in the Central
Bay in August. Mercury is compared to guidelines
only on a total basis. |
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