| 31. | California regulations consider mercury levels above 0 . 3 ppm high enough to warrant further study.
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| 32. | But beginning in the late 1980s, mercury levels began to spike, peaking in the early 1990s.
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| 33. | These factors when presented with high mercury levels, are home to the bacteria that process it.
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| 34. | The study monitored 67 patients as they reduced their fish intake and subsequently their bodies'mercury levels.
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| 35. | That means the fish are concentrated where MMS sediment samples indicate mercury levels may be highest.
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| 36. | :: : : : : Eating seagull bagels is a health risk because of high mercury levels.
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| 37. | In salt water, the most voracious predatory fish seem to have the worst mercury levels, scientists agree.
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| 38. | The government's original benchmark had been mercury levels of 50 parts per million detected in people's hair.
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| 39. | A rise in mercury levels in water could cause the disappearance of mimic shiners in some areas.
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| 40. | So mercury levels in bass haven't changed.
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